Asymmetrical tapered roller bearing for the purpose of mounting a gearwheel on a gearshaft

Patent metadata

Field	Value
Publication number	US-9500223-B2
Application number	US-201414780185-A
Country	US
Kind code	B2
Filing date	Jun 30, 2014
Priority date	Jul 30, 2013
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

A bearing assembly for a transmission of a vehicle, including: a gearwheel; a gearshaft; and a double-row, asymmetrical tapered roller bearing between the gearwheel and the gearshaft, in an O arrangement and including a first row of tapered rollers, which adjoins a shaft end and a second row of tapered rollers, which adjoins the first row of tapered rollers. The first and second rows of tapered rollers are arranged between a shared outer ring arranged on the gearwheel and separate, dedicated inner rings arranged on the gearshaft. A first acute contact angle on the first row of tapered rollers is not equal to a second acute contact angle on the second row of tapered rollers. The first contact angle is at least 3° less than the second contact angle. A difference between the second contact angle and the first contact angle is at most 10°.

First claim

The invention claimed is:

1. A bearing assembly for a transmission of a vehicle, comprising:
a gearwheel;
a gearshaft; and,
a double-row, asymmetrical tapered roller bearing between the gearwheel and the gearshaft in an O arrangement, the tapered roller bearing including:
a first plurality of tapered rollers, having a first size; and,
a second plurality of tapered rollers having a second size, less than the first size and which adjoins the first plurality of tapered rollers, wherein:

the first and second pluralities of tapered rollers are arranged between:
a shared outer ring arranged on the gearwheel; and,
first and second separate, dedicated inner rings, respectively, arranged on the gearshaft;

a first acute contact angle on the first plurality of tapered rollers is not equal to a second acute contact angle on the second plurality of tapered rollers;
the first contact angle is at least 3° less than the second contact angle; and,
a difference between the second contact angle and the first contact angle is at most 10°.

2. The bearing assembly according to claim 1 , wherein the first contact angle is at least 15°, but at most 21°.

3. The bearing assembly according to claim 1 , wherein the first contact angle is 18.09°.

4. The bearing assembly according to claim 1 , wherein the second contact angle is at least 20°, but at most 26°.

5. The bearing assembly according to claim 1 , wherein the second contact angle is 23.5°.

6. The bearing assembly according to claim 1 , wherein the gearwheel is designed as a drive gear or a gearwheel.

7. The bearing assembly according to claim 1 , wherein an axial width of the first plurality of tapered rollers is between 25% and 40% greater than an axial width of the second plurality of tapered rollers.

8. A planetary drive for a vehicle, having a bearing assembly according to claim 1 .

Assignees

• Schaeffler Technologies Ag

Inventors

• Hubert Thomas
• Hofmann Sven
• Pabst Alexander
• Schoenstein Frank

Classifications

• F16C2361/61

  Toothed gear systems, e.g. support of pinion shafts · CPC title

• F16C2240/34

  Contact angles · CPC title

• F16C19/505

  with the diameter of the rolling elements of one row differing from the diameter of those of another row · CPC title

• F16C33/585

  of raceways, e.g. ribs to guide the rollers · CPC title

• F16C19/386 Primary

  in O-arrangement · CPC title