Vehicle differential

Patent metadata

Field	Value
Publication number	US-10487932-B2
Application number	US-201615365032-A
Country	US
Kind code	B2
Filing date	Nov 30, 2016
Priority date	Nov 30, 2016
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A differential housing includes a body including an outer surface. The body has a first end, a second end, and an intermediate portion extending therebetween. A ring gear support member extends outwardly of the body at the second end. A ring gear support surface forms a first section of the intermediate portion. The ring gear support surface defines a first outer diameter of the intermediate portion. A ring gear is mounted to the outer surface of the body. The ring gear includes an inner annular surface having a first region defining a first inner diameter and a second region defining a second inner diameter. The first region includes a sawtooth profile to establish a desired alignment of the ring gear and the body and the second region facilitating an interference fit with the ring gear support surface.

First claim

What is claimed is:

1. A differential housing comprising:
a body including an outer surface, the body having a first end, a second end, and an intermediate portion extending therebetween;
a ring gear support member extending outwardly of the body at the second end;
a ring gear support surface defining a first outer diameter of the intermediate portion; and
a ring gear mounted to the outer surface of the body, the ring gear including an inner annular surface having a first region defining a first inner diameter and a second region defining a second inner diameter, the first region including a sawtooth profile to establish a desired alignment of the ring gear and the body and the second region facilitating an interference fit with the ring gear support surface, wherein the sawtooth profile includes at least two tooth elements, a first tooth element of the at least two tooth elements defining a first circumferential portion of the inner annular surface and a second tooth element of the at least two tooth elements defining a second circumferential portion of the inner annular surface that is axially spaced from the first circumferential portion, wherein the first tooth element defines a leading tooth having a first angled surface portion including a first angle relative to an axial axis of the body and the second tooth element defines a trailing tooth having a second angled surface portion having a second angle relative to the axial axis of the body, the second angle being greater than the first angle.

2. The differential housing according to claim 1 , wherein the second angle is between about 5° and about 15°.

3. The differential housing according to claim 2 , wherein the second angle is about 10°.

4. The differential housing according to claim 1 , wherein the second inner diameter is defined by the sawtooth profile and is between about 0.25 and about 0.75-mm greater than the first outer diameter.

5. The differential housing according to claim 4 , wherein the second inner diameter is between about 0.5-mm greater than the first outer diameter.

6. A differential comprising:
a housing portion including an outer surface and an inner surface defining a gear receiving zone;
a first axle tube extending outwardly of the housing portion in a first direction;
a second axle tube extending outwardly of the housing portion in a second direction opposite of the first direction; and
a differential housing arranged in the housing portion, the differential housing comprising:
a body including an outer surface, the body having a first end, a second end, and an intermediate portion extending therebetween;
a ring gear support member extending outwardly of the body at the second end;
a ring gear support surface forming a first section of the intermediate portion, the ring gear support surface defining a first outer diameter of the intermediate portion; and
a ring gear mounted to the outer surface of the body, the ring gear including an inner annular surface having a first region defining a first inner diameter and a second region defining a second inner diameter, the first region including a sawtooth profile establishing a desired alignment of the ring gear and the body and the second region facilitating an interference fit with the ring gear support surface, wherein the sawtooth profile includes at least two tooth elements, a first tooth element of the at least two tooth elements defining a first circumferential portion of the inner annular surface and a second tooth element of the at least two tooth elements defining a second circumferential portion of the inner annular surface that is axially spaced from the first circumferential portion, wherein the first tooth element defines a leading tooth having a first angled surface portion including a first angle relative to an axial axis of the body and the second tooth element defines a trailing tooth having a second angled surface portion having a second angle relative to the axial axis of the body, the second angle being greater than the first angle.

7. The differential according to claim 6 , wherein the second angle is between about 5° and about 15°.

8. The differential according to claim 7 , wherein the second angle is about 10°.

9. The differential according to claim 6 , wherein the second inner diameter is defined by the sawtooth profile and is between about 0.25 and about 0.75-mm greater than the first outer diameter.

10. The differential according to claim 9 , wherein the second inner diameter is between about 0.5-mm greater than the first outer diameter.

11. A ring gear for a vehicle differential comprising:
an inner annular surface having a first region defining a first inner diameter and a second region defining a second inner diameter, the first region including a sawtooth profile establishing a desired alignment of the ring gear relative to a body and the second region facilitating an interference fit between the ring gear and the body, wherein the sawtooth profile includes at least two tooth elements, a first tooth element of the at least two tooth elements defining a first circumferential portion of the inner annular surface and a second tooth element of the at least two tooth elements defining a second circumferential portion of the inner annular surface that is axially spaced from the first circumferential portion, wherein the first tooth element defines a leading tooth having a first angled surface portion including a first angle relative to an axial axis and the second tooth element defines a trailing tooth having a second angled surface portion having a second angle relative to the axial axis, the second angle being greater than the first angle.

12. The ring gear according to claim 11 , wherein the second angle is between about 5° and about 15°.

13. The ring gear according to claim 12 , wherein the second angle is about 10°.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Wilson William J
• Rakshit Debkumar
• Trombat Steven G
• Kennell Jevon
• Revers Dan E

Classifications

• F16H48/10

  with orbital spur gears · CPC title

• F16H48/40 Primary

  characterised by features of the rotating cases · CPC title

• F16H2048/385

  of the ring or crown gear · CPC title

• F16H48/08

  comprising bevel gears · CPC title

• F16H55/17

  Toothed wheels (worm wheels F16H55/22; chain wheels F16H55/30) · CPC title