REDUCTION GEAR

• US 20150101435A1
• Filed: 09/15/2014
• Published: 04/16/2015
• Est. Priority Date: 10/10/2013
• Status: Active Grant

• Current Assignee: Sumitomo Heavy Industries Limited
• Original Assignee: Sumitomo Heavy Industries Limited
• Inventors: Asano, Kyoshi
• Granted Patent: US 9,556,932 B2
• Time in Patent Office: Days
• US Class Current: 74/416
• CPC Class Codes: F16H 1/12 with non-parallel axes
• CPC Class Codes: F16H 1/14 comprising conical gears only
• CPC Class Codes: F16H 1/28 with gears having orbital motion
• CPC Class Codes: F16H 57/02 Gearboxes; Mounting gearing therein
• CPC Class Codes: F16H 57/025 Support of gearboxes, e.g. torque arms, or attachment to other devices
• CPC Class Codes: Y10T 74/1966 Intersecting axes

Abstract

A reduction gear includes: an orthogonal shaft reduction gear having an orthogonal shaft reduction gear casing; and a parallel shaft reduction gear having a parallel shaft reduction gear casing, which is connected to the orthogonal shaft reduction gear, wherein the orthogonal shaft reduction gear casing and the parallel shaft reduction gear casing are connected through a joint plate, the orthogonal shaft reduction gear casing has a flange portion protruding to the outside of the orthogonal shaft reduction gear casing, and the orthogonal shaft reduction gear casing and the joint plate are connected by a first bolt inserted into the flange portion from the orthogonal shaft reduction gear side, and a second bolt inserted into the joint plate from the parallel shaft reduction gear side.

Claims

1. A reduction gear comprising:

an orthogonal shaft reduction gear having an orthogonal shaft reduction gear casing; and

a parallel shaft reduction gear having a parallel shaft reduction gear casing, which is connected to the orthogonal shaft reduction gear,

wherein the orthogonal shaft reduction gear casing and the parallel shaft reduction gear casing are connected through a joint plate,

the orthogonal shaft reduction gear casing has a flange portion protruding to the outside of the orthogonal shaft reduction gear casing, and

the orthogonal shaft reduction gear casing and the joint plate are connected by a first bolt inserted into the flange portion from the orthogonal shaft reduction gear side, and a second bolt inserted into the joint plate from the parallel shaft reduction gear side.

2. The reduction gear according to claim 1, wherein the orthogonal shaft reduction gear is provided with an orthogonal pinion shaft which is supported on the orthogonal shaft reduction gear casing through a bearing,

the joint plate has a connection portion which is disposed at a position overlapping with the bearing supporting the orthogonal pinion shaft when viewed from a radial direction of the orthogonal pinion shaft, and

the second bolt is inserted into the connection portion.

3. The reduction gear according to claim 2, wherein the bearing supporting the orthogonal pinion shaft is configured with a pair of bearings, and the second bolt is disposed at a position equidistant from the pair of bearings.

4. The reduction gear according to claim 1, wherein the joint plate and the parallel shaft reduction gear casing are connected by a third bolt inserted into the joint plate from the orthogonal shaft reduction gear side.

5. The reduction gear according to claim 4, wherein a concave portion accommodating a head portion of the third bolt is provided in the joint plate, and the concave portion is blocked by the orthogonal shaft reduction gear casing.