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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2019/044233
Kind Code:
Provided is a deceleration device in which lubricating oil can be stably supplied to a spline coupling of a rotation source and a rotating shaft, even when a rotation-side housing rotates at high speed for a long time. The deceleration device 14 comprises a plurality of planetary gear mechanisms 23, 31, 37 that decelerate the rotation of a hydraulic motor 12 and transmit the rotation to a rotation-side housing 17. An output shaft 13 of the hydraulic motor 12 and a rotating shaft 24 are coupled by a spline coupling S, and the rotation-side housing 17 is filled with lubricating oil 43. A third carrier 40 of the final planetary gear mechanism 37 is fixedly supported on a fixed-side housing 15, and a supply pathway 44 is configured from a through-hole 45 formed through the third carrier 40 and a space 46 located above the spline coupling S, whereby, even during high-speed travel for a long time, lubricating oil 43 ejected from a portion where a third sun gear 38 and a third planetary gear 39 mesh is supplied to the spline coupling S through the through-hole 45 and the space 46.

UEKI Tomohiro (Hitachi Construction Machinery Co. Ltd., 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
UZAWA Nobuo (Hitachi Construction Machinery Co. Ltd., 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
Application Number:
Publication Date:
March 07, 2019
Filing Date:
July 18, 2018
Export Citation:
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HITACHI CONSTRUCTION MACHINERY CO., LTD. (16-1, Higashiueno 2-chome Taito-k, Tokyo 15, 〒1100015, JP)
International Classes:
F16H1/28; F16H57/04
Foreign References:
Attorney, Agent or Firm:
THE PATENT BODY CORPORATE TAKEWA INTERNATIONAL PATENT OFFICE (UNIZO Nishishimbashi 3-chome Bldg, 13-3 Nishishimbashi 3-chome, Minato-k, Tokyo 03, 〒1050003, JP)
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