Free-wheeling overload coupling

US4075873A · kind A · utility

Assignee

• Jean Walterscheid GmbH · DE

Inventor

• Hubert Geisthoff · Lohmar, DE

Key dates

• Filing date: Aug 31, 1976
• Grant date: Feb 28, 1978
• Expiry date: Aug 31, 1996

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D43/206
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An overload coupling has a first coupling member, a second coupling member which is rotatable relative to the first coupling member but fixed axially with respect thereto and a third coupling member rotatably disposed between the first and second coupling members and axially movable between a first position in which torque transmitting means provided on the second and third coupling members are in engagement and a second position in which the torque transmitting means are disengaged. A plurality of torque transmitting balls are circumferentially spaced in the first coupling member and are spring biased axially toward the second coupling member. The third coupling member is provided with a plurality of arcuate recesses to receive the torque transmitting balls and each of these recesses has a torque transmitting portion and a free-wheeling portion. The axial distance between the torque transmitting and free-wheeling portions is greater than the distance between the engaged and disengaged positions of the third coupling member. The first coupling member is further provided with a plurality of spring biased bolts which are engageable with the third coupling member to urge the third cou…