Pick holder extraction

Details Pick holder extraction Pick holder extraction

E - Fixed Constructions

21

C

E21C 35/18 (2006.01) E21C 35/19 (2006.01) E21C 35/197 (2006.01) E21C 37/24 (2006.01)

Patent

CA 2217500

A pick holder (110) is frictionally seated via a round cylindrical barrel (112) in a pick box of a continuous miner. A pick is in operation rotationally located in a bore (114). The bore (114), toward a rear thereof, has an internal, inwardly projecting screw thread (30). When the pick has been removed, the pick holder (110) is extracted from the pick box by screwing a screw threaded shank into the screw thread (30), and applying an extracting force via the shank and the interengaged screw threads to the pick holder (110).

Ce porte-pic (110) est mis en place par friction par l'intermédiaire d'un barillet cylindrique (112) dans le casier à pics d'un mineur continu. En fonctionnement, un pic est disposé par rotation dans une âme (114) qui présente, sur sa partie arrière un filetage interne (30) orienté vers l'intérieur. Une fois le pic retiré, le porte-pic (110) est extrait du casier à pics par vissage d'une tige filetée dans ce filetage (30) et par application d'une force d'extraction au porte-pic (110) par l'intermédiaire de cette tige et des deux filetages qui sont en prise.

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