Shaft and hub connection assembly

A shaft and hub connection assembly for transmitting torque, comprising:

• a shaft extending along and rotatable about an axis and terminating axially at a shaft end;
• a hub extending along and rotatable about the axis and terminating axially at a hub end;
• one of the shaft end of the shaft and the hub end of the hub defining a male connection portion, and the other of the shaft end of the shaft and the hub end of the hub defining a female connection portion for receiving and being coupled with the male connection portion;
• the female connection portion having a radially inner surface defined by a plurality of inside faces;
• the male connection portion having a radially outer surface defined by a plurality of outside faces and removably nested within the plurality of inside faces for coupling the male and female connection portions to one another;
• each of the plurality of outside faces of the male connection portion being concave or convex shaped along a first circumferential radius;
• and
• each of the plurality of inside faces of the female connection portion being concave or convex shaped along a second circumferential radius being substantially the same as the first circumferential radius.

A shaft and hub connection assembly for transmitting torque, comprising:

• a shaft extending along and rotatable about an axis and terminating axially at a shaft end;
• a hub extending along and rotatable about the axis and terminating axially at a hub end;
• one of the shaft end of the shaft and the hub end of the hub defining a male connection portion, and the other of the shaft end of the shaft and the hub end of the hub defining a female connection portion for receiving and being coupled with the male connection portion;
• the female connection portion having a radially inner surface defined by a plurality of inside faces;
• the male connection portion having a radially outer surface defined by a plurality of outside faces and nested within the plurality of inside faces for coupling the male and female connection portions to one another;
• a first flange extending outwardly from the shaft in spaced relationship with the shaft end;
• a second flange extending from the hub adjacent to the hub end and positioned in abutting axially end-to-end relationship with the first flange;
• wherein a first axial radius is defined between the first flange and one of the radially outer and inner surfaces, a second axial radius is defined between the second flange and the other of the radially outer and inner surfaces, and a gap is defined between the first axial radius and the second axial radius such that all contact between the male and female connection portions occurs along the outside and inside faces.