Abstract: A gear system includes a planetary gear and a frame structure including connection sections for attaching the frame structure to an external mechanical structure such as a nacelle of a wind power plant. The planetary gear includes a planet carrier, a sun wheel, a gear ring, and planet wheels meshing with the sun wheel and with the gear ring. The planet carrier includes a mechanical interface structure for connecting to an external rotating element such as a wind rotor. The frame structure includes a front cover shield that is a single piece of material, attached to the gear ring, and shaped to constitute a bearing cover for covering and supporting a bearing that supports the planet carrier. Thus, there is no need for a separate bearing cover.

Abstract: A planet wheel assembly includes a planet shaft, a planet wheel having radial contact surfaces and axial contact surfaces, bushings connected to the planet shaft, radial sliding elements between radial contact surfaces of the bushings and the radial contact surfaces of the planet wheel, and axial sliding elements between axial contact surfaces of the bushings and the axial contact surfaces of the planet wheel. The planet wheel is shaped to constitute a circumferential projection which protrudes radially towards the planet shaft, is axially between the radial sliding elements, and forms the first and second axial contact surfaces of the planet wheel. This arrangement, where the radial sliding elements are axially outmost and the axial sliding elements are on the middle, improves the ability of the radial sliding elements to act against forces tilting the planet wheel.

Abstract: A planet wheel assembly includes a planet shaft, a planet wheel having radial contact surfaces and axial contact surfaces, bushings connected to the planet shaft, radial sliding elements between radial contact surfaces of the bushings and the radial contact surfaces of the planet wheel, and axial sliding elements between axial contact surfaces of the bushings and the axial contact surfaces of the planet wheel. The planet wheel is shaped to constitute a circumferential projection which protrudes radially towards the planet shaft, is axially between the radial sliding elements, and forms the first and second axial contact surfaces of the planet wheel. This arrangement, where the radial sliding elements are axially outmost and the axial sliding elements are on the middle, improves the ability of the radial sliding elements to act against forces tilting the planet wheel.