Global Patent Index - EP 1319801 A2

EP 1319801 A2 2003-06-18 - System for exchanging pick holders having tension screws

Title (en)

System for exchanging pick holders having tension screws

Title (de)

Meisselhalterwechselsystem mit Spannschrauben

Title (fr)

Système pour échanger des porte-pics avec des vis de serrage

Publication

EP 1319801 A2 (DE)

Application

EP 02025217 A

Priority

DE 10161713 A

Abstract (en)

The chisel holder (20), especially for a road surface cutting machine, is secured by a clamping bolt (15) at the mounting (11) on the road milling roller (10). The outer thread (16) of the clamping bolt and/or the inner thread (14) of the threaded drilling (13) at the holder mounting have a metal layer of zinc and aluminum segments with a chrome oxide bonding agent. The applied metal coating is fired when in place. The coating thickness is 5-10 mu m, and the number of segments per mu m of the coating increases the barrier effect of the coated surfaces. The coating is applied by immersion, centrifugally or spraying, to be dried and then fired at 300 degrees C. The friction value of the screw bond is reduced by the addition of a dry lubricant

Abstract (de)

Die Erfindung betrifft ein Meißelhalterwechselsystem mit einem Basisteil (11) mit einer Meißelhalteraufnahme (12), in die ein mit einem Meißel bestückter Meißelhalter (20) einsetzbar ist, wobei der Meißelhalter (20) mit einem Halterschaft (22) in die Meißelhalteraufnahmen (12) eingeführt und mittels Spannschrauben (15) darin festgehalten sind und wobei die Spannschrauben in eine Gewindeaufnahme (13) des Basisteils (11) einschraubbar ist und sich dabei unter Spannung in einer Spannaufnahme (23) des Halterschaftes (22) des Meißelhalters abstützen. Bei einem Meißelhalterwechselsystem ist nach der Erfindung vorgesehen, dass die Oberflächen des Außengewindes (16) der Spannschraube (15) und/oder des Innengewindes der Gewindeaufnahme der Meißelhalteraufnahmen (12) mit einer metallischen Schicht aus Zink- und Aluminiumlamellen und einem mineralischen Chromoxyd-Bindemittel versehen sind, die nach dem Aufbringen eingebrannt ist, dann werden die Schraubverbindungen so verbessert, dass größere Vorspannkräfte/Anziehdrehmomente übertragbar sind, ohne eine Beschädigung der Schraubverbindungen befürchten zu müssen. <IMAGE>

IPC 1-7 (main, further and additional classification)

E21C 35/193

IPC 8 full level (invention and additional information)

E21C 35/193 (2006.01); E21C 35/18 (2006.01); E21C 35/19 (2006.01)

CPC (invention and additional information)

E21C 35/193 (2013.01); E21C 2035/1826 (2013.01); E21C 2035/191 (2013.01); Y10S 411/903 (2013.01); Y10S 411/914 (2013.01)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

EPO simple patent family

EP 1319801 A2 20030618; EP 1319801 A3 20030820; EP 1319801 B1 20060517; AT 326613 T 20060615; DE 10161713 A1 20030710; DE 10161713 B4 20040205; DE 50206795 D1 20060622; ES 2261580 T3 20061116; US 2003132660 A1 20030717; US 6866343 B2 20050315

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