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US 5,291,801 AGranted
Gear device
AssigneeThe Japan Steel Works, Ltd.
InventorsSeigo Hanada, Yukio Fukuchi, Junji Kawamoto, Koji Nakamura, Masahiro Abe
Life of this patent
Estimating the term…
Abstract
A low noise type reduction gear which assures that sound generated by collision of particles of a lubricant with a wall surface of a casing and sound attributable to resonance of the casing can substantially be attenuated by arranging laminated vibration damping steel sheets inside of the casing.
Claims11
A gear device, comprising:
- a casing;
- an input shaft rotatably mounted in said casing;
- an output shaft rotatably mounted in said casing;
- at least a first gear fixedly mounted on said input shaft,
- at least a second gear fixedly mounted on said output shaft;
- said first gear and said second gear being operatively engaged so as to cause said output shaft to rotate at a second speed when said input shaft is rotated at a first speed;
- and
- a plurality of vibration damping and sound absorbing sheets continuously arranged inside of said casing along substantially an entire periphery of an inner wall of said casing, said sheets being fixed upon an inner wall of the casing so as to define a space between said sheets and the entire periphery of said inner wall.
5 more elements
A gear device, comprising:
- a casing;
- an input shaft rotatably mounted in said casing;
- an output shaft rotatably mounted in said casing;
- at least a first gear fixedly mounted on said input shaft,
- at least a second gear fixedly mounted on said output shaft;
- said first gear and said second gear being operatively engaged so as to cause said output shaft to rotate at a second speed when said input shaft is rotated at a first speed;
- a plurality of vibration damping and sound absorbing sheets arranged inside of said casing, and
- a plurality of seats formed on an inner wall of said casing so as to project therefrom, said sheets being fixed upon a mounting surface of said seats so as to define a space between said sheets and said inner wall, wherein said sheets are formed of a laminated construction.
5 more elements
A gear device, comprising:
- a casing;
- an input shaft rotatably mounted in said casing;
- an output shaft rotatably mounted in said casing;
- at least a first gear fixedly mounted on said input shaft,
- at least a second gear fixedly mounted on said output shaft;
- said first gear and said second gear being operatively engaged so as to cause said output shaft to rotate at a second speed when said input shaft is rotated at a first speed;
- a plurality of vibration damping and sound absorbing sheets arranged inside of said casing, and
- a plurality of seats formed on an inner wall of said casing so as to project therefrom, said sheets being fixed upon a mounting surface of said seats so as to define a space between said sheets and said inner wall, wherein said sheets have respective vibrational characteristics which are different from each other so as to absorb sounds generated in the gear device.
5 more elements
Dependencies are inferred from the claim text.