Spur gear for use in a spur gear unit, gearwheel pair for a spur gear unit, spur gear unit having such a gearwheel pair, and method for producing a spur gear and its use in spur gear units

A gearwheel pair for a spur gear unit, comprising:

• a first spur gear, and
• a second spur gear, which can be arranged to mesh with the first spur gear,
• wherein the first spur gear consists entirely or partially of metal or plastic, and
• the second spur gear comprises:
• an outer part having a gear rim made of a first plastic and having a number of injection-molded portions,
• an inlay part made of metal, and
• a connecting part made of a second plastic, the connecting part arranged between the inlay part and the outer part for an interlocked and/or materially-bonded connection between the inlay part and the outer part.

A method, comprising:

• producing a spur gear, wherein the spur gear comprises:
• an outer part having a gear rim made of a first plastic,
• an inlay part made of metal, and
• a connecting part made of a second plastic, which is arranged between the inlay part and the outer part for an interlocked and/or materially-bonded connection between the inlay part and the outer part, and
• injection molding the outer part while forming a number of injection-molded portions, and
• injection molding the connecting part between the outer part and the inlay part such that the connection part overlaps the injection-molded portions.