Gear device and manufacturing method for gear device
Number of patents in Portfolio can not be more than 2000
United States of America
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Mar 8, 2022
Grant Date -
Oct 15, 2020
app pub date -
Apr 2, 2020
filing date -
Apr 2, 2020
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A gear device includes an internal gear and an external gear that meshes with the internal gear, in which the internal gear is made of a resin, the external gear is made of a material having a smaller linear expansion coefficient than the resin, and PCDs of the internal gear and the external gear before use of the gear device are set such that lost motion becomes 0 min or more and 15 min or less due to a difference in a thermal expansion amount between the internal gear and the external gear at a time of use of the gear device.
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