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Title:
GEAR STRUCTURE, AND MOTOR ASSEMBLY AND POWERED TOOL EACH HAVING GEAR STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2019/155893
Kind Code:
A1
Abstract:
[Problem] To provide a gear structure configured so that a lubricant can be maintained on a bevel gear for a longer period of time. [Solution] A gear structure 14 is provided with a gear housing 42, a first bevel gear 44, and a second bevel gear 46. The gear housing 42 has a gear facing surface 56 extending annularly and facing the teeth 54 of the second bevel gear 46. The gear facing surface 56 has: a lubricant receiving section 60 located ahead of the first bevel gear 44 with respect to the rotational direction of the second bevel gear 46; a lubricant application section 62 located ahead of the lubricant receiving section 60 with respect to the rotational direction and positioned closer to the second bevel gear 46 than the lubricant receiving section 60; and a guide section 64 sloped from the lubricant receiving section 60 toward the lubricant application section 62. A lubricant splashed from the first bevel gear 44 is received by the lubricant receiving section 60, flows up to the lubricant application section 62 while being guided by the guide section 64, and is applied to the second bevel gear 46 by the lubricant application section 62.

Inventors:
YOKOYAMA, Toshiki (9-4, Nakaikegami 2-chome, Ohta-k, Tokyo 55, 〒1468555, JP)
Application Number:
JP2019/002192
Publication Date:
August 15, 2019
Filing Date:
January 24, 2019
Export Citation:
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Assignee:
NITTO KOHKI CO., LTD. (9-4 Nakaikegami 2-chome, Ohta-ku Tokyo, 55, 〒1468555, JP)
International Classes:
F16H57/038; B25F5/00; F16H1/14; H02K7/116
Attorney, Agent or Firm:
ITOH, Shigeru et al. (4F DSG Hamamatsu-cho Bldg. 11-7, Hamamatsu-cho 1-Chome Minato-k, Tokyo 13, 〒1050013, JP)
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