Method for mounting a contact pin for a piezoelectric element, sleeve, and actuator unit

US7495372B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Marko Adam · Chemnitz, DE
• Bernhard Döllgast · Wolfsberg, AT
• Emanuel Sanftleben · Pfatter, DE

Key dates

• Filing date: Feb 23, 2005
• Grant date: Feb 24, 2009
• Expiry date: Apr 16, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/42

Abstract

During the production of an actuator unit (11), which is to be installed in a fuel injector, a piezoelectric element (8) is firstly inserted into a plastic sleeve (1). Two contact pins (5) are provided for the external power supply for the piezoelectric element (8), and are guided outside the plastic sleeve (1). In order to fix the position of the contact pins (5), particularly before encapsulating the piezoelectric element (8) with the plastic sleeve (1), pin mounts (2) provided in the form of detent connections are provided for the contact pins (5). The detent connections (2) are designed for fixing the contact pins (5) in the position thereof after they have been inserted into these detent connections. In one particular embodiment, the plastic sleeve (1) is provided in the form of a one-piece hollow body so that the mounting can be effected in a particularly simple manner.