Planet Transmission, Drive Device Comprising the Planet Transmission and Vehicle Comprising the Drive Device

摘要

A planetary transmission includes a sun gear, which constitutes an input drive to the planetary transmission, a ring gear arranged around the sun gear, and a planet carrier which is designed to rotate and which carries at least one planet wheel, which planet wheel meshes with the sun gear and the ring gear. The planet carrier constitutes an output drive from the planetary transmission. The planetary transmission further includes a wet disk brake, a first set of brake disks in the brake being rotationally locked to the planet carrier and thereby in operation rotating at the rotational speed of the planet carrier. The planetary transmission further comprises an arrangement for circulation of a cooling fluid through the brake which is rotationally locked to the sun gear and thereby in operation rotates at the rotational speed of the sun gear.