Lightweight wave gear drive
AssigneeHarmonic Drive Systems Inc.
InventorMasaru Kobayashi
Life of this patent
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Abstract
A wave gear drive has a wave generator with a hub and rigid cam plate formed of titanium alloy. Heat-dissipating fins are provided on both sides of these parts, and heat-dissipation is further increased by plating the surfaces with a material having a higher coefficient of thermal conductivity than that of titanium alloy. The result is a lightweight wave gear drive having good heat-dissipating properties that uses titanium alloy, which is stronger and more rigid than aluminum alloy.
Claims6
A lightweight wave gear drive comprising a rigid, circular internal gear, a flexible, circular external gear, and a wave generator that radially flexes the external gear into partial engagement with the internal gear and moves the position of engagement of the two gears in a circumferential direction;
- the wave generator including a circular hub, a rigid cam plate formed around an outer periphery of the hub, and a wave bearing provided between an outer peripheral surface of the rigid cam plate and an inner peripheral surface of the external gear;
- wherein, of the hub and the rigid cam plate, at least the rigid cam plate is formed of titanium alloy;
- and
- at least a portion of two sides of the rigid cam plate is formed as a crenellated heat-dissipating surface.
Dependencies are inferred from the claim text.