Title:
WAVE GEARING
Document Type and Number:
Japanese Patent JP2000055147
Kind Code:
A
Abstract:
To heighten the fatigue strength of a flexible external gear for use in a wave gearing and prevent occurrence of a brittle fracture.
To a diaphragm of a flexible external gear for use in a wave gearing, a soft nitriding process is applied from the two surfaces, wherein the depths of their nitrided layers are expressed with d1 and d2. The total depth of nitrided layers d1+d2 is controlled to under 45% of the thickness (t) of the part having undergone the soft nitriding process, which allows heightening of the static strength and fatigue strength of the diaphragm and prevention of a rupture due to brittle fracture.
Inventors:
KOBAYASHI MASARU
Application Number:
JP22129598A
Publication Date:
February 22, 2000
Filing Date:
August 05, 1998
Export Citation:
Assignee:
HARMONIC DRIVE SYSTEMS
International Classes:
F16H1/32; (IPC1-7): F16H1/32
Attorney, Agent or Firm:
Shiro Yokozawa
Previous Patent: NEEDLE ROLLER BEARING
Next Patent: SWASH PLATE TYPE HYDRAULIC MOTOR WITH PLANETARY REDUCTION GEAR
Next Patent: SWASH PLATE TYPE HYDRAULIC MOTOR WITH PLANETARY REDUCTION GEAR