Multi-component gear wheel for a gear assembly of a brake actuator, brake actuator having such a multi-component gear wheel, and method for producing such a multi-component wheel

A method for producing a multi-component gear wheel (10), comprising:

• injection molding a sleeve-shaped support body (100) made of a first plastic material;
• and
• overmolding the sleeve-shaped support body (100) with a gear wheel body (200) made of a second plastic material, which has a lower stiffness and higher elasticity than the first plastic material, such that the gear wheel body (200) is firmly integrally formed onto the sleeve-shaped support body (100),
• wherein the gear wheel body (200) has outer toothing (210) and inner spindle-nut toothing (230) for receiving a spindle (50),
• wherein the spindle-nut toothing (230) is at least partially axially spaced apart from the outer toothing (210) in one direction,
• wherein the support body (200) protrudes axially at least partially into a region of the outer toothing (210) and into a region of the spindle toothing (230), and
• wherein the support body (100) has a smaller outer diameter than the outer toothing (210).

A multi-component gear wheel (10) for a gear assembly of a brake actuator, comprising:

• a sleeve-shaped support body (100) made of a first plastic material;
• and
• a gear wheel body (200) firmly integrally formed onto the sleeve-shaped support body (100) and made of a second plastic material, which has a lower stiffness and higher elasticity than the first plastic material,
• wherein the gear wheel body (200) has outer toothing (210) and inner spindle-nut toothing (230) for receiving a spindle (50),
• wherein the spindle-nut toothing (230) is at least partially axially spaced apart from the outer toothing (210) in one direction,
• wherein the support body (100) protrudes axially at least partially into a region of the outer toothing (210) and into a region of the spindle-nut toothing (230),
• wherein the support body (100) has a smaller outer diameter than the outer toothing (210),
• wherein the outer toothing (210) comprises teeth (212), the outer toothing (210) comprising helical gear toothing, and wherein the sleeve-shaped support body (100) has, below each of the teeth (212), a wall portion (120) directed radially toward the helical gear toothing in order to support a relevant one of the teeth (212) of the outer toothing (210), and
• wherein the wall portion (120) is cup-shaped and is concave in a region of a radial wall (122) thereof.