Patent ID: 6979157
Filing Date: 2005-12-27
Classification: B23B,F16D,Y10T

Abstract:
1. A coupling for use between the modules of a modular tool holder arm, comprising: a male coupling part forming the end of a first module and containing a central, hollow journal having a symmetrical cross section, which journal is bordered on one end thereof by a first end face perpendicular to its perimeter surface, and a female coupling part forming the end of a second module connected to the first module and containing a central, hollow seat having a symmetrical cross section, which is bordered on an end of the second module by a second end face perpendicular to its perimeter surface, wherein in an engaged state of the coupling, the male and female coupling parts form a shaft-hub seat as a first power transmission location and the first and second end faces resting against each other by frictional engagement form a second power transmission location, wherein at least under load during rotation of the coupling about a rotational axis thereof, a first stress field develops at the first power transmission location, and a second stress field develops at the second power transmission location, and wherein the first power transmission location is separated from the second power transmission location, so that each of said stress fields is influenced only by the power transmission location forming the respective stress field, wherein drive keys form a third power transmission location, wherein at least under load, a third stress field forms in the third power transmission location, and wherein the second and the third power transmission locations are separated from each other so that each of said stress fields is influenced only by the power transmission location forming the respective stress field.