发明名称 |
Method for producing a tubular spring and an actuator unit comprising one such tubular spring |
摘要 |
A method for producing a tubular spring ( 12 ) in the form of a cylindrical hollow body, especially for pre-tensioning a piezoelectric actuator element ( 2 ) of an actuator unit ( 1 ) of a fuel injector comprises the step of providing a thin-walled, solid-drawn steel tube with a plurality of regularly arranged longish recesses ( 14 ) by means of laser cutting. Thus, an actuator unit ( 1 ) comprises a piezoelectric actuator element ( 2 ) which is arranged in a thin-walled cylindrical hollow body, wherein the hollow body being elastically embodied and pre-tensioning the actuator element ( 2 ). Furthermore, the hollow body is a solid-drawn steel tube which is provided with a plurality of longish recesses ( 14 ).
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申请公布号 |
US7222424(B2) |
申请公布日期 |
2007.05.29 |
申请号 |
US20040821775 |
申请日期 |
2004.04.09 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
JOVOVIC DEJAN;LEWENTZ GUENTER;VOIGT ANDREAS;ZUMSTRULL CLAUS |
分类号 |
B23P15/16;B21D51/16;F02M63/00;F16F1/02;H01L41/053;H02N2/04 |
主分类号 |
B23P15/16 |
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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