BEARING ARRANGEMENT FOR THE WORKING SPINDLE OF A MACHINE

• Main Authors: SCHULTEN, HERMANN, KUHN, SIEGFRIED, PHILIPP, BERNHARD
• Format: Patent
• Language: English; German
• Published: 12.01.1989
• Edition: 4
• Subjects: BEARINGS; BLASTING; BORING; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT; DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MACHINE TOOLS; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; TRANSPORTING; TURNING; WEAPONS

A bearing arrangement for the working spindle of a machine-tool, e.g. a lathe, comprises angular contact ball bearings in tandem-O-arrangement with an inner, a middle, and an outer ball bearing. To ensure that the effective leverage of this type of bearing arrangement is as short as possible and that its length is defined as far as possible and remains approximately constant under load, the diameter of the spindle is greater in the region of the outer bearing than in the region of the other bearings. Un agencement de support de la broche de travail d'une machine-outil, par exemple un tour, comprend des roulements à billes à contact oblique montés en tandem-O avec un roulement à billes interne, un roulement à billes intermédiaire et un roulement à billes externe. Afin que la longueur du bras en porte à faux d'un tel agencement de support soit aussi réduite et aussi définie que possible, et reste constante même sous contrainte, la broche présente dans la région du roulement externe un diamètre plus grand que dans la région des autres roulements.