the fact that a pump device 73 is additionally received in a pivot 72 of the housing pump device 73 is comprised of a tappet 74 which is supported in an axially movable manner in a bore 75 of pivot 72 of the housing tappet 74 is acting on a pressure chamber 76 which is connected with an outlet valve 77 and an inlet valve 78 inlet valve 78 feeds into a lower interior space 79 of the housing which as a rule is completely filled with oil outlet valve 77 on the other hand is connected via a connection channel 80 with a bore 81 centrally extending in driving shaft 24 bore 81 is extending up to above the antifriction bearing 26 provided for supporting the driving shaft 24 due to the action of the pump the oil is therefore pumped from interior space 79 of the housing and via inlet valve 78 and outlet valve 77 located within the bore 81 up to antifriction bearing 26 from where it supplies both the driving shaft 24 and the other components of the gearing with an adequate amount of oil in the embodiment shown tappet 74 is pressed by a spring 82 against a pot shaped attachment 84 of bevel gear 83 and rests in a groove 85 that is arranged in the form of a ring around screw bolt 18 and comprises a wavelike deepening so that when.