Global Patent Index - EP 3903999 A1

EP 3903999 A1 20211103 - IMPROVED SPINDLE FOR ROTATING HEADS FOR CALIBRATION OR SMOOTHING OF ARTIFICIAL OR NATURAL PLANAR MATERIALS

Title (en)

IMPROVED SPINDLE FOR ROTATING HEADS FOR CALIBRATION OR SMOOTHING OF ARTIFICIAL OR NATURAL PLANAR MATERIALS

Title (de)

VERBESSERTE SPINDEL FÜR ROTIERENDE KÖPFE ZUM KALIBRIEREN ODER GLÄTTEN VON KÜNSTLICHEN ODER NATÜRLICHEN PLANEN MATERIALIEN

Title (fr)

BROCHE AMÉLIORÉE POUR TÊTES ROTATIVES POUR LE CALIBRAGE OU LE LISSAGE DE MATÉRIAUX PLANS ARTIFICIELS OU NATURELS

Publication

EP 3903999 A1 20211103 (EN)

Application

EP 21020234 A 20210426

Priority

IT 202000009079 A 20200427

Abstract (en)

A spindle for rotating heads for calibrating or dressing artificial or natural planar materials comprises: a sleeve (10) within which a body (5) of the spindle is slidable in turn provided with a spindle shaft (6) at the lower end (3) of which a rotating head (2) with abrasive tools (9) is applied; at least two pneumatic cylinders (11) for positioning the spindle (1), i.e., the head connected thereto, on a supporting structure (13); fixing the sleeve to the structure (13) of a machine on which the spindle is mounted by means of an adjustment flange (12) with spherical surface (20); at least two electric rotation drive motors (24) of the spindle and a transmission from said motors to the spindle shaft (6); said electric motors being coupled in rotation to the spindle shaft each with a belt transmission (21); between said sleeve and said spindle shaft (6) a sliding body which supports the spindle shaft (1) in rotation and is pushed in a raised or lowered position on the planar surface (30) in operation with said pneumatic cylinders (11); furthermore, it has the pneumatic cylinders connected outside the sleeve (10) and, with a stem (14) at the lower sheet (15) of a transmission box (16) on whose upper sheet (17) a front flanged support (25) is fixed for each electric motor (24); the transmission box (16) comprises outer closing walls positioned between the two lower (15) and upper sheets (17); a central cover (42) for closing, stiffening and accessing the internal compartment with the central groove wheel (22), for belt transmissions, connected and rotating with the spindle shaft (6).

IPC 8 full level

B24B 41/04 (2006.01); B24B 7/22 (2006.01); B24B 47/22 (2006.01)

CPC (source: EP)

B24B 7/22 (2013.01); B24B 41/04 (2013.01); B24B 47/22 (2013.01)

Citation (applicant)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3903999 A1 20211103; IT 202000009079 A1 20211027

DOCDB simple family (application)

EP 21020234 A 20210426; IT 202000009079 A 20200427