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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10274049 B1

PDFFull Text
Date of Patent:
Apr. 30, 2019

Filed:

Mar. 01, 2016

Reduction device

Applicant:

Hitachi Construction Machinery Co., Ltd., Taito-ku, Tokyo, JP;

Inventors:

Takeshi Shinohara, Omitama, JP;

Takeshi Shibukawa, Abiko, JP;

Assignee:

Hitachi Construction Machinery Co., Ltd., Tokyo, JP;

Attorney:

Crowell & Moring LLP

Primary Examiner:

Jacob S Scott

Assistant Examiner:

Murad Jahmani

Int. Cl.
CPC ...
F16H 1/46 (2006.01); B60K 17/04 (2006.01); F16C 17/10 (2006.01); E02F 9/20 (2006.01); F16H 57/08 (2006.01); F16H 47/04 (2006.01); F16H 57/04 (2010.01); B60K 7/00 (2006.01); E02F 9/02 (2006.01); E02F 3/32 (2006.01);
U.S. Cl.
CPC ...
F16H 1/46 (2013.01); B60K 7/0015 (2013.01); B60K 17/046 (2013.01); E02F 9/202 (2013.01); F16C 17/10 (2013.01); F16H 47/04 (2013.01); F16H 57/0482 (2013.01); F16H 57/0486 (2013.01); F16H 57/082 (2013.01); B60Y 2200/412 (2013.01); B60Y 2400/73 (2013.01); E02F 3/32 (2013.01); E02F 9/02 (2013.01);
Abstract

A reduction device () includes a fixed-side housing () accommodating a hydraulic motor () having an output shaft () and a rotating-side housing () rotated with respect to the fixed-side housing (), and a first-stage planetary gear reduction mechanism () having a first sun gear () and a second-stage planetary gear reduction mechanism () having a second sun gear () are provided in the rotating-side housing (). The first-stage planetary gear reduction mechanism () has a rotational shaft () having one side in an axial direction spline-connected with the output shaft (), while the first sun gear () is provided on the other side in the axial direction of the rotational shaft (). A small-diameter shaft (B) is provided on the rotational shaft (), and first and second half bushes () are fitted with the small-diameter shaft (B) from a radial direction. Thereby, the first sun gear () and a stepped part (A) of the second sun gear () are slidably brought into contact with flange parts (B,B) of the first and second half bushes ().

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