Power transmission gear unit and vehicle instrument
AssigneeYazaki Corporation
InventorTaisei FUKUDA
Life of this patent
Estimating the term…
Abstract
Hemispherical protrusions are protrudingly provided in end surfaces of a rotor gear and a tooth portion of a small gear having the smaller number of gear teeth between the rotor gear and a large gear of an intermediate gear, and between the small gear of the intermediate gear and an output gear, which are meshed with each other in a transmission gear train. Thus, in a case where the large gear rides on the rotor gear or the small gear rides on the output gear when the intermediate gear is accommodated in a housing after the rotor gear and the output gear are accommodated, it is possible to cancel the riding state thereof only by applying a slight vibration to the housing.
Claims5
A power transmission gear unit comprising:
- a housing;
- and
- a plurality of gears with rotation axes disposed in parallel with each other, the plurality of gears being accommodated in the housing, wherein
- the plurality of gears is accommodated in the housing from each rotation axis direction,
- a pair of the gears to be meshed with each other inside the housing is provided with a processed portion in an end surface part of a tooth portion in an end surface of at least one gear, which is configured to shorten a dimension of a flat portion of the end surface part than an outline of the tooth portion in a rotation direction of the one gear, and
- the processed portion is provided in a location at which the tooth portion of the one gear meshed with a tooth portion of the other gear between the pair of gears overlaps with the tooth portion of the other gear in a radial direction of the one gear.
Dependencies are inferred from the claim text.