发明名称 |
Rotating head for crystal pulling systems |
摘要 |
A rotating head (11) for crystal pulling systems (1) according to Czochralski has a reference platform (16) which is able to rotate around a vertical rotation axis (A-A) with a vertical feed-through opening (25) for a pulling cable (13) that can be wound up and a drive assembly (23) for driving a horizontal shaft (22). A winding drum (15) with a helical winding groove (29) for the pulling cable is located on this shaft in a fixed manner so it cannot rotate, but can be moved axially. In order to avoid abrasion and contamination and to accurately guide the cable (13), a helical guiding element (30) with the same pitch as the winding groove is located on the horizontal shaft (22) at a location remote from the vertical rotation axis (A-A). This guiding element is able to rotate with the horizontal shaft. The guiding element works together with a guiding nut (31) in such a way that the part of the cable (13) which faces tangentially away from the winding drum (15) is directly guided in the vertical rotation axis (A-A). Here, the helical guiding element (30) is designed as a guiding groove and the guiding nut (31) cooperates with the guiding groove by means of rotating balls (32).
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申请公布号 |
US5702523(A) |
申请公布日期 |
1997.12.30 |
申请号 |
US19940302194 |
申请日期 |
1994.08.31 |
申请人 |
LEYBOLD AKTIENGESELLSCHAFT |
发明人 |
SCHULMANN, WINFRIED;THIMM, FRANZ;KAISER, HELMUT |
分类号 |
C30B15/30;(IPC1-7):C30B35/00 |
主分类号 |
C30B15/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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