Toothed belt

Patent metadata

Field	Value
Publication number	US-9353827-B2
Application number	US-201013500968-A
Country	US
Kind code	B2
Filing date	Aug 31, 2010
Priority date	Oct 13, 2009
Publication date	May 31, 2016
Grant date	May 31, 2016

Abstract

Configuring the inside of a tooth portion 15 of a toothed belt 10 with a core rubber layer 14 and the outer periphery of the tooth portion 15 with a tooth rubber layer 12 . Also, including short fibers in the core rubber layer 14 . The tooth rubber layer 12 is formed by curing a rubber composition containing 10 parts by weight or less high-density polyethylene with 100 parts by weight of matrix rubber. The value of tan δ for the tooth rubber layer 12 at 100-120° C. is maintained at 0.100-0.120.

First claim

The invention claimed is:

1. A toothed belt comprising:
a belt body in which one face is provided with at least a tooth portion and a tooth bottom portion alternately positioned in a belt longitudinal direction;
the belt body comprising a tooth rubber layer provided along an outer periphery of the tooth portion provided on the one face; and
the tooth rubber layer comprises a cured rubber composition containing between 3 and 10 parts by weight of high-density polyethylene with respect to 100 parts by weight of matrix rubber.

2. The toothed belt as claimed in claim 1 , wherein the belt body further comprises a core rubber layer that is provided inside of the tooth portion and the tooth rubber layer is arranged to extend about a side of the core rubber layer.

3. The toothed belt as claimed in claim 2 , wherein the core rubber layer has a higher modulus than a modulus of the tooth rubber layer.

4. The toothed belt as claimed in claim 3 , wherein the core rubber layer is loaded with short fibers.

5. The toothed belt as claimed in claim 4 , wherein the short fibers are evenly distributed within the core rubber layer.

6. The toothed belt as claimed in claim 5 , wherein the short fibers are substantially oriented in the belt longitudinal direction in a vicinity of a top of the tooth portion and in a vicinity of the tooth bottom portion.

7. The toothed belt as claimed in claim 4 , the short fibers comprising Aramid.

8. The toothed belt as claimed in claim 2 , wherein the belt body comprises a backing rubber layer provided on an other face of the belt body that is opposite the one face; the core rubber layer is provided between the backing rubber layer and the tooth rubber layer; and a cord element extending in the belt longitudinal direction is embedded in a boundary between the core rubber layer and the backing rubber layer.

9. The toothed belt as recited in claim 8 , further comprising an intermediate fabric provided within the backing rubber layer, extending in the belt longitudinal direction and spaced from the cord element.

10. The toothed belt as claimed in claim 1 , further comprising a tooth fabric that covers an outer surface of the tooth portion, the tooth fabric comprising a fabric impregnated with rubber cement containing the high-density polyethylene.

11. The toothed belt according to claim 10 , the tooth fabric comprising a corrugate shaped preform.

12. The toothed belt according to claim 10 , the tooth fabric comprising a woven fabric.

13. The toothed belt according to claim 10 , the tooth fabric comprising a woven fabric with a warp extending in the belt width direction and a weft extending in the belt longitudinal direction.

14. The toothed belt according to claim 13 , the weft comprising a bicomponent filament yarn.

15. The toothed belt as claimed in claim 1 , wherein the toothed belt is applied in an internal combustion engine.

16. The toothed belt as recited in claim 1 , wherein a ratio of a loss modulus to a storage modulus of the tooth rubber layer is within a range of 0.10-0.12.

Assignees

• Uchigashima Shinji
• Yamada Mitsuhiro
• Harada Yohei
• Terasaki Akira
• Shimamura Kaoru
• Gates Unitta Asia Co
• Honda Motor Co Ltd

Inventors

• Uchigashima Shinji
• Yamada Mitsuhiro
• Harada Yohei
• Terasaki Akira
• Shimamura Kaoru

Classifications

• F16G1/28 Primary

  with a contact surface of special shape, e.g. toothed · CPC title

• F16G1/10

  with textile reinforcement · CPC title