Gearwheel with an insert portion made of metal and an outer portion made of plastic, steering mechanism with such a gearwheel and method for producing such a gearwheel

A gearwheel comprising:

• an insert portion made of metal;
• and
• an outer portion made of plastic, wherein the outer portion comprises a toothed rim with a plurality of teeth directed outward relative to a central longitudinal axis of the gearwheel and the outer portion is injection-molded onto the insert portion,
• wherein the outer portion has a plurality of injection-molded sections on a side surface of the insert portion which is directed transversely to the central longitudinal axis,
• wherein each of the injection-molded sections has a three-sided shape,
• wherein one corner of each injection-molded section extends radially inward toward the central longitudinal axis,
• wherein each injection-molded section has two side edges arranged such that between the two side edges an obtuse angle opening radially outward relative to the central longitudinal axis is formed,
• wherein the plurality of injection-molded sections are distributed uniformly around the central longitudinal axis,
• wherein the corner extending radially inward of each injection-molded section is curved and defines a radius, such that a notional full circle with that radius lies completely on the side surface of the insert portion and coincides flush with an outer circumference of the insert portion, and
• wherein the plurality of injection-molded sections on the side surface of the insert portion are positioned a distance apart from one another and side surface areas of the insert portion between directly adjacent injection-molded sections are left free.