Title:
REDUCTION GEAR AND ELECTRIC POWER STEERING DEVICE
Document Type and Number:
Japanese Patent JP2016094159
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a reduction gear which improves torque efficiency of the reduction gear, which prevents wear of a worm and a worm wheel and which suppresses generation of rattle noise, and an electric power steering device which uses the reduction gear.SOLUTION: A reduction gear includes: a worm 11 and a worm wheel 12 which mesh with each other; a grease G for lubrication; and a housing 7 for accommodating the worm 11 and the worm wheel 12. In the housing 7, it includes a substantially cylindrical internal space B disposed with an interval in a radial direction between itself and an outer periphery of the worm wheel 12. A grease accumulation part 7d is formed which is recessed in a lower part direction in the gravity direction than the internal space B, and on both sides in the circumferential direction, labyrinth seals 7e, 7f are formed between the worm wheel 12 and the housing 7, and a part of the worm wheel 12 is immersed in the grease G of the grease accumulation part 7d, and a part of the grease G attached to the worm wheel 12 is scraped off by the labyrinth seals 7e, 7f.SELECTED DRAWING: Figure 2
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Inventors:
ASHIDAKA MASAYOSHI
Application Number:
JP2014232751A
Publication Date:
May 26, 2016
Filing Date:
November 17, 2014
Export Citation:
Assignee:
JTEKT CORP
International Classes:
B62D5/04; F16H1/16; F16H57/039; F16H57/04