Gear

A gear (1) having a gear body (200) made of a first plastic material, wherein the gear body (200) has

• an axis of rotation (R),
• external toothing (210) arranged around an axis of rotation,
• a centrally located receiving opening (220), and
• an intermediate portion (225) located between the external toothing (210) and the wall (221) of the receiving opening (220),
• wherein the gear body (200) is fixedly integrally formed on a support body (100), which is arranged at least partially in the intermediate portion (225) and is made of a second plastic material, which has a higher stiffness and lower elasticity than the first plastic material, such that surface portions of the external toothing (210), of the wall (221) of the receiving opening (220), of the intermediate portion (225), and of the support body (100) form a substantially flat end face of the gear (1), and wherein the support body (100) has reinforcing portions (120) for teeth (212) of the external toothing (210),
• characterized by the following additional features:
• the external toothing (210) is helical toothing with teeth (212) which, at least in portions, extend at a helix angle (W) to the axis of rotation (R),
• at least some of the reinforcing portions (120) extend at least in portions at an angle (V) which corresponds at least approximately to the helix angle (W) of the helical toothing,
• the support body (100) has an annular carrier structure (110) which is oriented perpendicularly to the axis of rotation (R) and on which the reinforcing portions (120) are located,
• the annular carrier structure (110) has first projections (111) which each project in the radial direction toward a tooth (212) of the external toothing (210), and
• the first projections (111) of the carrier structure (110), which each project in the radial direction toward a tooth (212) of the external toothing (210), are set back in the radial direction with respect to the maximum extent of the reinforcing portions (120).