Lubrication mechanism for a wave gear device
AssigneeHarmonic Drive Systems Inc.
InventorMasaru Kobayashi
Life of this patent
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Abstract
According to a lubrication mechanism for a wave gear device 1, frictionally contacting parts 5 of toothed parts of gears 2 and 3 are lubricated using a lubricant with a high base oil viscosity and favorable shear stability. Frictionally contacting parts 7 of the external gear 3 and wave generator 4 and frictionally contacting parts 9 on the inside of wave bearing 42 are respectively lubricated using solid lubricants 8 and 10 that are produced by mixing a low base oil viscosity grease with a resin with low deformation resistance and hardening the mixture by heating. In this way, the lubrication life is extended without causing decreases in the efficiency of the wave gear device.
Claims8
A lubrication mechanism for a wave gear device, the wave gear device including:
- a ring-shaped rigid internal gear;
- a ring-shaped flexible external gear;
- and
- a wave generator for flexing the external gear in a radial direction and has the external gear partially engage the internal gear, and for moving engaging parts of the internal gear and the external gear in a circumferential direction,
- the lubrication mechanism comprising:
- grease that fills toothed parts of the internal gear and the external gear;
- and
- a solid lubricant that is attached to frictionally contacting parts within the wave generator and adjacent to frictionally contacting parts of the external gear and the wave generator.
Dependencies are inferred from the claim text.