Shaft-hub connection with toothing
A method for producing a shaft-hub connection, in particular between a helically toothed pinion ( 2 ) and a hub ( 6 ), a partial section ( 3 ) of the helically toothed running toothing ( 4 ) of the pinion is used, during the connection to the hub, as a type of chip-removing cutting tool, by virtue of the partial section cutting with the profiles of its teeth into the hub in an axially aligned fashion.
1. A shaft-hub connection comprising:
a hub having a multi-step bore comprising a first step of diameter d 1 and a second step of diameter d 2 wherein diameter d 2 is greater than diameter d 1 ; and
a pinion having a centering bolt portion and a partial section portion, said partial section portion having a helically toothed running toothing and a circumferential cut bevel having an undercut angle, said centering bolt portion is received in the first step and the circumferential cut bevel is cut into an interior surface of the second step defining diameter d 2 to positively lock the hub to the pinion, wherein the circumferential cut bevel is undercut with respect to an end ring surface with an angle of <15°, a first elliptical shaped indent is provided between the partial section of the helically toothed running toothing of the pinion and the rest of the running toothing of the pinion and a second elliptical shaped indent is provided between the partial section and the centering bolt wherein the first and second indents relieve any possible notch stresses.
2. The shaft-hub connection as claimed in claim 1 , wherein a diameter of a head circle of the partial section portion of the helically toothed running toothing on the pinion is slightly smaller than a diameter of the head circle of the rest of the running toothing of the pinion.
3. The shaft-hub connection as claimed in claim 1 , wherein the multi-step is formed by an entry section as the first centering section, and a connecting section and a centering section as the second centering section, wherein these bore sections have different axial lengths and internal diameters of different sizes.
4. The shaft-hub connection as claimed in claim 3 , wherein the entry section of the multi-step bore of the hub is shorter in axial length than the axial length of the connecting section, and has an internal diameter which corresponds to the diameter of the head circle of the partial section of the running toothing of the pinion.
5. The shaft-hub connection as claimed in claim 4 , wherein the connecting section of the multi-step bore corresponds in axial length to the axial length of the partial section of the running toothing of the pinion, reduced by the axial length of the entry section of the multi-step bore.
6. The shaft-hub connection as claimed in claim 3 , wherein the internal diameter of the connecting section of the multi-step bore is made slightly smaller than the diameter of the head circle of the partial section of the running toothing of the pinion.
7. The shaft-hub connection as claimed in claim 3 , wherein the centering section which follows the connecting section corresponds in its dimensions to those of the centering bolt which is provided coaxially at the free end of the partial section of the helically toothed running toothing of the pinion.
8. The shaft-hub connection as claimed in claim 1 , wherein the running toothing encloses a slope angle (β) with respect to a central axis (M) of the pinion of 1° to 30°.
9. The shaft-hub connection as claimed in claim 1 , wherein in a region of the partial section in a region of an external lateral surface, the helically toothed running toothing encloses a clearance angle (α 1 , α 2 ) with respect to a lateral surface of the pinion which is in the range from −5° to +5°.
10. The shaft-hub connection as claimed in claim 1 , wherein the undercut angle is about 7.5°.