Planetary gearbox with a thrust washer having anti-rotation means

A planetary gearbox comprising:

• a housing formed as a planet carrier with at least two support cheeks, the support cheeks connected axially by means of connecting pieces, and two flanks of the planet carrier facing away from one another comprise a pair of stops, each stop formed circumferentially between two adjacent connecting pieces, and the two flanks are formed on and extend radially from one or more of the at least two support cheeks;
• a planet bearing mounted in the housing and formed from an axially aligned planet pin and a thrust washer;
• and
• a planet gear rotatable about a planetary axis on the planet bearing, wherein the thrust washer comprises:
• an outer circumferential surface;
• two integrally-formed projections, each facing a one of the pair of stops to prevent rotation of the thrust washer about the planetary axis and extending radially beyond the outer circumferential surface relative to the planetary axis;
• first thrust surfaces disposed on a first side of the thrust washer facing the housing;
• first lubrication channels formed axially opposite the first thrust surfaces and extending radially outwards;
• second thrust surfaces circumferentially offset from the first thrust surfaces and disposed on a second side of the thrust washer facing the planet gear;
• and
• second lubrication channels formed axially opposite the second thrust surfaces and extending radially outwards.

A planetary gearbox comprising:

• a housing comprising a pair of stops;
• a planet bearing mounted in the housing and formed from an axially aligned planet pin and a thrust washer;
• and
• a planet gear rotatable about a planetary axis on the planet bearing, wherein the thrust washer comprises:
• two integrally-formed tongue-like projections curved so as to form a wing, each wing engaged behind a one of the pair of stops to prevent rotation of the thrust washer about the planetary axis;
• a radially outer surface;
• first thrust surfaces disposed on a first side of the thrust washer facing the housing and first lubrication channels formed axially opposite the first thrust surfaces and extending radially outwards to the radially outer surface;
• and
• second thrust surfaces circumferentially offset from the first thrust surfaces and disposed on a second side of the thrust washer facing the planet gear and second lubrication channels formed axially opposite the second thrust surfaces and extending radially outwards to the radially outer surface,
• wherein the housing comprises a housing section formed as a planet carrier;
• and
• wherein the planet carrier comprises:
• two axially offset support cheeks connected by connecting pieces;
• and
• two flanks facing away from one another and formed circumferentially between two circumferentially adjacent connecting pieces, the flanks formed on and extending radially from at least one of the support cheeks;
• and
• wherein:
• the two flanks form the pair of stops;
• and
• a distal end portion of each of the two tongue-like projections includes a bend such that the distal end portion contacts a corresponding flank of the planet carrier.