Drawing lock for torque transmitting engagement between two shaft members arrestable in the open position

US4639162A · kind A · utility

Assignee

• Jean Walterscheid GmbH · DE

Inventors

• Hubert Geisthoff · Lohmar, DE
• Theo Buthe · Lohmar, DE
• Felix Mikeska · Lohmar, DE

Key dates

• Filing date: Mar 4, 1986
• Grant date: Jan 27, 1987
• Expiry date: Mar 4, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T403/604
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In a mechanism for connecting together in torque transmitting engagement a coupling sleeve and a power takeoff shaft, particularly in agricultural implements, there is provided a drawing lock which may be arrested in the open position. The drawing lock includes a locking ring which holds a plurality of radially movable torque transmitting balls in their locked position during torque transmission of the assembly. A slotted spring ring is provided which engages the torque transmitting balls to hold them radially inwardly thereby to arrest the device in the open position. When a power takeoff shaft is inserted into the bore of the coupling sleeve, the torque transmitting balls are moved radially outwardly and, as a result, the slotted spring ring resiliently expands in diameter thereby to cause a first stop face of the ring to become disengaged from a supporting face of a supporting ring which is axially affixed to the coupling sleeve. The slotted ring then moves axially out of engagement with the torque transmitting balls and a second stop face on the ring engages the supporting face of the supporting ring. In accordance with a second embodiment of the invention, the slotted spring r…