Title:
HELICAL GEAR, AND SPEED REDUCER
Document Type and Number:
WIPO Patent Application WO/2023/074839
Kind Code:
A1
Abstract:
A disclosed helical gear (12) comprises: a helical portion (2) formed by forming a helical tooth trace on an outer cylindrical surface of a cylindrical rim (1); and a thinned portion (3) formed by recessing an area on one end surface, in an axial direction, of the rim (1), in which a distance to an axis (D) is equal to or less than a prescribed value, toward the other end surface side. If a ratio of a value obtained by subtracting a thinned thickness (H) of the thinned portion (3) from a thickness (G) of the rim (1), to a tooth thickness (J) of the helical portion (2) is defined as a first ratio (P), and a ratio of a recessed dimension (F) to an overall length dimension (E), in the axial direction, of the rim (1) is defined as a second ratio (Q), relationships between the first ratio (P) and two end points (m, n) of a range of the second ratio (Q) are P=12.628m-25.78, and P=9.8605n-88.24 (P: first ratio [%]; m: one end point [%]; n: other end point [%]).
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Inventors:
SUWA MASAKAZU (JP)
Application Number:
PCT/JP2022/040326
Publication Date:
May 04, 2023
Filing Date:
October 28, 2022
Export Citation:
Assignee:
MABUCHI MOTOR CO (JP)
International Classes:
F16H1/46; F16H55/17
Foreign References:
| US5368528A | 1994-11-29 | |||
| JPS5442870U | 1979-03-23 |
Attorney, Agent or Firm:
SANADA PATENT FIRM (JP)
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