Seal and roller bearing

Patent metadata

Field	Value
Publication number	US-9777773-B2
Application number	US-201615092053-A
Country	US
Kind code	B2
Filing date	Apr 6, 2016
Priority date	Apr 9, 2015
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

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:
the roller bearing seal having an internal face configured to be oriented toward an inside of a bearing and having an external face configured to be oriented toward an outside of the bearing;
an insert part positioned along the internal face of the roller bearing seal, 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 radially outer deflection to an axial length (L 1 ) of the radially inner deflection is less than zero point six five (0.65), the radially outer deflection having an outer deflection axial end located distal from the annular-disk-shaped middle section, the radially inner deflection having an inner deflection axial end located distal from the annular-disk-shaped middle section;
a polymer part configured to form sealing contact with an inner ring and an outer ring of the bearing, the polymer part being connected to the insert part such that the entire external face is formed by the polymer part, the polymer part proximate the radially outer deflection not extending axially past the outer deflection axial end of the radially outer deflection; and
a seal lip formed by the polymer part, the seal lip being formed radially below the radially inner deflection and the seal lip being oriented in a direction opposite to the radially inner deflection, the seal lip not being axially overlapped by the radially inner deflection, the seal lip being the only contact between the polymer part proximate to the radially inner deflection and the bearing.

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

4. 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.

5. The roller bearing seal according to claim 4 , wherein the third ratio is from 0.25 to 0.35.

6. 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.

7. The roller bearing seal according to claim 6 , wherein the fourth ratio is from 0.02 to 0.1.

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

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

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

11. 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.

12. 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 the roller bearing seal of claim 1 is disposed at at least one axial end of the roller bearing, and wherein a section of the bearing cage overlaps at least one of the radially inner deflection and the radially outer deflection by at least 100% of a material thickness of the bearing cage.

13. The roller bearing according to claim 12 , 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.

14. The roller bearing according to claim 13 , wherein the ratio is from 0.5 to 0.6.

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

16. The roller bearing seal according to claim 1 ,
wherein a second ratio (B/H) of a total axial width (B) of the roller bearing seal at its outer diameter to a cross-section height (H) of the roller bearing seal is from 0.05 to 0.35,
wherein a third ratio of a total axial width (C) of the roller bearing seal at an inner diameter to the cross-section height (H) of the roller bearing seal is from 0.15 to 0.45, and
wherein a fourth ratio of a material thickness (T) of the insert part to the cross-section height (H) of the roller bearing 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 radially outer deflection and the radially inner deflection,
wherein the radially 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 radially 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

• F16C2322/12

  Rolling apparatus, e.g. rolling stands, rolls · 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

• F16C33/7876

  with sealing lips · CPC title

• F16C33/7856 Primary

  with a single sealing lip · CPC title

• F16C33/7823

  of sealing lips · CPC title