Parking lock for an automatic transmission in a motor vehicle

US11708900B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Florian Weinl · Gettorf, DE
• Sebastian Deeg · Blitzenreute, DE
• Dirk Leutheuser · Oberdorf, DE
• Tobias Miller · Weingarten, DE
• Arthur Strehlau · Friedrichshafen, DE
• Julia Klein · Oberdorf, DE
• Matthias List · Dresden, DE
• Armin Gierling · Tettnang, DE

Key dates

• Filing date: Oct 15, 2020
• Grant date: Jul 25, 2023
• Expiry date: Dec 19, 2040

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H63/3475
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A parking lock includes a locking pawl (2) and an interlocking element (6) arranged on a connecting bar (5) to a selector lever (4). The end of the connecting bar (5) facing away from the interlocking element (6) is articulatedly connected to the selector lever (4). A hydraulically actuatable actuator (10) includes two pistons (11, 12) provided for disengaging the parking lock. During normal operation, a detent device (13), which is actuatable by an electromagnet (13a), locks the first piston (11) in a piston position corresponding to an engaged condition (P_ein) or a disengaged condition (P_aus). Without requiring activating the electromagnet (13a) to release the detent device (13), the parking lock, during normal operation, is manually disengagable with an emergency disengagement device (15) acting upon the second piston (12) and is manually engagable with an emergency engagement device (16) acting upon the detent device (13).