Seal and roller bearing

Patent metadata

Field	Value
Publication number	US-2016298689-A1
Application number	US-201615092053-A
Country	US
Kind code	A1
Filing date	Apr 6, 2016
Priority date	Apr 9, 2015
Publication date	Oct 13, 2016
Grant date	—

Abstract

A roller bearing seal includes an insert part and a polymer part connected to the insert part, and the insert part includes an annular-disc-shaped middle section having a radially inner deflection and a radially outer deflection, and a first ratio (L 2/ L 1 ) of an axial length (L 2 ) of the outer deflection to an axial length (L 1 ) of the inner deflection is less than 0.65.

First claim

What is claimed is:

1 . A roller bearing seal comprising an insert part and a polymer part connected to the insert part, wherein the insert part comprises an annular-disc-shaped middle section having a radially inner deflection and a radially outer deflection, and wherein a first ratio (L 2 /L 1 ) of an axial length (L 2 ) of the outer deflection to an axial length (L 1 ) of the inner deflection is less than 0.65.

2 . The seal according to claim 1 , wherein a second ratio (B/H) of a total axial width (B) of the seal at its outer diameter to a cross-section height (H) of the seal is from 0.05 to 0.35.

3 . The seal according to claim 1 , wherein a third ratio of a total axial width (C) of the seal at an inner diameter to a cross-section height (H) of the seal is from 0.15 to 0.45.

4 . The seal according to claim 1 , wherein a fourth ratio of a material thickness (T) of the insert part to a cross-section height (H) of the seal is from 0.02 to 0.1.

5 . The seal according to claim 1 , wherein the annular-disc-shaped central section is flat or deviates from flatness by less than 5°.

6 . The seal according to claim 1 , wherein the insert part has no angular deflections apart from the outer deflection and the inner deflection.

7 . The seal according to claim 1 , wherein the inner deflection is conically formed and is oriented at an angle (a) of 30°+/−20° to a bearing axial direction (A).

8 . The seal according to claim 1 , wherein a fifth ratio of the axial length (L 1 ) of the inner deflection to a total width of the seal is greater than 0.3.

9 . A cylindrical or tapered roller bearing including a plurality of rolling elements disposed between an inner bearing ring and an outer bearing ring, wherein sections of a bearing cage are disposed between the rolling elements and a seal is disposed at at least one axial end of the roller bearing, and wherein an insert part is provided in the seal, and wherein the insert part includes a deflection and wherein a section of the bearing cage overlaps the deflection by at least 100% of a material thickness of the bearing cage.

10 . The roller bearing according to claim 9 , wherein a ratio of a radial extension (H) of the seal to a cross-sectional height (BH) of the roller bearing is from 0.4 to 0.7, and a cross-section height (BH) results from a difference of an outer diameter of the outer bearing ring to an inner diameter of the inner bearing ring of the roller bearing.

11 . The roller bearing seal according to claim 1 , wherein the first ratio is less than 0.55.

12 . The roller bearing seal according to claim 2 , wherein the second ratio is from 0.1 to 0.15.

13 . The roller bearing seal according to claim 3 , wherein the third ratio is from 0.25 to 0.35.

14 . The roller bearing seal according to claim 4 , wherein the fourth ratio is from 0.02 to 0.1.

15 . The roller bearing according to claim 10 , wherein the ratio is from 0.5 to 0.6.

16 . The roller bearing seal according to claim 1 ,
wherein the insert part comprises an annular-disc-shaped middle section having a radially inner deflection and a radially outer deflection, wherein a first ratio (L 2 /L 1 ) of an axial length (L 2 ) of the outer deflection to an axial length (L 1 ) of the inner deflection is less than 0.65, wherein a second ratio (B/H) of a total axial width (B) of the seal at its outer diameter to a cross-section height (H) of the seal is from 0.05 to 0.35, wherein a third ratio of a total axial width (C) of the seal at an inner diameter to a cross-section height (H) of the seal is from 0.15 to 0.45, and wherein a fourth ratio of a material thickness (T) of the insert part to a cross-section height (H) of the seal is from 0.02 to 0.1.

17 . The seal according to claim 16 ,
wherein the annular-disc-shaped central section is flat or deviates from flatness by less than 5°, wherein the insert part has no angular deflections apart from the outer deflection and the inner deflection, wherein the inner deflection is conically formed and is oriented at an angle (α) of 30°+/−20° to a bearing axial direction (A), and wherein a fifth ratio of the axial length (L 1 ) of the inner deflection to a total width of the seal is greater than 0.3.

Assignees

• Reugels Michael
• Bernreuther Philipp
• Foti Claudio
• Villalobos Héctor
• Skf Ab

Inventors

• Reugels Michael
• Bernreuther Philipp
• Foti Claudio
• Villalobos Héctor

Classifications

• F16C33/7813

  for tapered roller bearings · CPC title

• F16C33/7886

  mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race · CPC title

• F16C19/388 Primary

  with four rows, i.e. four row tapered roller bearings · CPC title

• F16C33/7876

  with sealing lips · CPC title

• F16C33/7856 Primary

  with a single sealing lip · CPC title