Gear box

Patent metadata

Field	Value
Publication number	US-10161498-B2
Application number	US-201615273292-A
Country	US
Kind code	B2
Filing date	Sep 22, 2016
Priority date	Mar 31, 2014
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A gear box includes a gear box body for accommodating a gear, multiple shaft holes which are formed on a side wall portion of the gear box body to support a shaft, a fixing portion which is provided in the gear box body and on which a fixing member for installing the gear box body on an installation surface parallel to the shaft is mounted, and an output hole reinforcement rib which is formed on the side wall portion and extends from a peripheral edge portion of an output shaft hole for supporting an output shaft among the multiple shaft holes toward the fixing portion.

First claim

What is claimed is:

1. A gear box, comprising:
a gear box body for accommodating a gear;
a plurality of shaft holes which are formed on a side wall portion of the gear box body to support a shaft, the plurality of shaft holes including a first shaft hole for supporting an output shaft and a second shaft hole; and
a fixing portion which is provided in the gear box body and on which a fixing member for installing the gear box body on an installation surface parallel to the shaft is mounted, the installation surface being a surface to which the gear box may be fixed,
wherein the fixing portion includes:
a first fixing portion that is provided on one side in one direction parallel to the installation surface, and
a second fixing portion which is provided on another side in the one direction,
wherein the side wall portion includes:
a shaft hole reinforcement rib that extends from a peripheral edge portion of the second shaft hole toward the first fixing portion,
an output hole reinforcement rib that extends from a peripheral edge portion of the first shaft hole toward the second fixing portion, and
a connection rib which connects the shaft hole reinforcement rib to the output hole reinforcement rib, and

wherein the shaft hole reinforcement rib, the output hole reinforcement rib, and the connection rib are provided so as to be continuous with one another along an arch-shaped virtual line from the second fixing portion toward the first fixing portion.

2. The gear box according to claim 1 ,
wherein the output hole reinforcement rib is formed so as to be inclined with respect to the installation surface.

3. The gear box according to claim 1 ,
wherein the connection rib is provided to pass closer to the installation surface than the plurality of shaft holes.

4. The gear box according to claim 1 ,
wherein the connection rib is provided to pass farther from the installation surface than the plurality of shaft holes.

5. The gear box according to claim 1 ,
wherein the connection rib includes a shaft hole rib which is provided in the peripheral edge portion of the second shaft hole.

6. The gear box according to claim 1 ,
wherein the connection rib is formed in a curve shape which protrudes outward with respect to the installation surface.

7. The gear box according to claim 1 ,
wherein the gear box body includes:
a lateral side wall portion on which the plurality of shaft holes, the output hole reinforcement rib, the connection rib, and the shaft hole reinforcement rib are formed,
lower side wall portion which faces the installation surface, and
a leg portion which protrudes from the lower side wall portion,

wherein the leg portion includes a first leg portion and a second leg portion which are displaced from each other in the one direction, and
wherein the first fixing portion is provided on a tip side of the first leg portion, and the second fixing portion is provided on a tip side of the second leg portion.

8. The gear box according to claim 7 ,
wherein the shaft hole reinforcement rib is one of a plurality of shaft hole reinforcement ribs, each of which are formed on the first leg portion at intervals in the one direction, and
wherein the first fixing portion includes a fixation target portion for fixation to the installation surface between the plurality of shaft hole reinforcement ribs.

9. The gear box according to claim 7 ,
wherein the output hole reinforcement rib is one of a plurality of output hole reinforcement ribs, each of which are formed on the second leg portion at intervals in the one direction, and
wherein the second fixing portion includes a fixation target portion for fixation to the installation surface between the plurality of output hole reinforcement ribs.

10. The gear box according to claim 1 ,
wherein the shaft hole reinforcement rib is formed of two ribs that extend from the peripheral edge portion of the second shaft hole and join so as to be connected to the first fixing portion.

11. The gear box according to claim 1 ,
wherein the connection rib includes a first shaft hole rib provided on the peripheral edge portion of the first shaft hole, a second shaft hole rib provided on the peripheral edge portion of the second shaft hole, and a linking rib that connects the first shaft hole rib to the second shaft hole rib, and
a protrusion height of the first shaft hole rib from the side wall portion is greater than a protrusion height of the linking rib from the side wall portion.

12. The gear box according to claim 1 ,
wherein the connection rib includes a first rib portion that passes farther from the installation surface than the plurality of shaft holes and a second connection rib portion that passes closer to the installation surface than the plurality of shaft holes,
wherein the shaft hole reinforcement rib includes a first shaft hole reinforcement rib portion continuous with the first connection rib portion and a second shaft hole reinforcement rib portion continuous with the second connection rib portion, and
wherein the output hole reinforcement rib includes a first output hole reinforcement rib portion continuous with the first connection rib portion and a second output hole reinforcement rib portion continuous with the second connection rib portion.

13. The gear box according to claim 1 ,
wherein the connection rib includes a first output hole rib provided on the peripheral edge portion of the first shaft hole, a second output hole rib provided on the peripheral edge portion of the second shaft hole, and a linking rib that connects the first output hole rib to the second output hole rib, and
wherein the linking rib includes a first linking rib portion extending from both the first output hole rib and the second output hole rib in a direction away from the installation surface, and a second linking rib portion connected to the first linking rib portion and the second output hole rib.

14. The gear box according to claim 1 ,
wherein the gear box body includes a tubular portion that protrudes in the one direction and that has an input shaft hole for supporting an input shaft, and
a first shaft rib is formed on an axial portion of the tubular portion.

15. The gear box according to claim 14 ,
wherein a second shaft rib is provided on a base end portion of the tubular portion, and the second shaft rib has a protrusion height greater than a protrusion height of the first shaft rib.

16. The gear box according to claim 1 ,
wherein the plurality of shaft holes further includes a third shaft hole, the first shaft hole, the second shaft hole, and the third shaft hole being provided in this order in the one direction,
wherein a first shaft rib hole is provided on the peripheral edge portion of the second shaft hole, and a second shaft hole rib is provided on a peripheral edge portion of the third shaft hole, and
wherein the first shaft hole rib and the second shaft hole rib partially overlap each other at an overlapping position, and an overlapping rib portion is formed on the overlapping position.

Assignees

• Sumitomo Heavy Industries

Inventors

• Sasaki Yasuhiko
• Abe Kazuhisa
• Yahara Ryosuke

Classifications

• F16H57/03

  characterised by means for reinforcing gearboxes, e.g. ribs · CPC title

• F16H57/021 Primary

  Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings · CPC title

• F16H57/025

  Support of gearboxes, e.g. torque arms, or attachment to other devices · CPC title