Device for locking a piston rod of a piston of an actuator which is pressurizable in order to disengage a parking lock and is spring-loaded in order to engage the parking lock

US11143299B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Florian Weinl · Gettorf, DE
• Thomas Schwegler · Tettnang, DE
• Maik Wiesner · Weingarten, DE
• Dirk Leutheuser · Oberdorf, DE

Key dates

• Filing date: Dec 4, 2020
• Grant date: Oct 12, 2021
• Expiry date: Dec 4, 2040

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H63/3425
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A device for locking a piston rod of a piston of an actuator is provided. An electrically actuatable electromagnet includes an armature rod, which is axially movable counter to a first preloading spring and on which two actuating elements are axially displaceably mounted between two stops of the armature rod. A second preloading spring is axially mounted between the two actuating elements. The actuating elements each include actuating contours, which are associated with latching mechanisms, via which the piston is mechanically fixable in a disengaged condition and in a engaged condition of the parking lock.