Use of a transmission belt in oil and related transmission system

Patent metadata

Field	Value
Publication number	US-9927001-B2
Application number	US-201314375442-A
Country	US
Kind code	B2
Filing date	Jan 31, 2013
Priority date	Jan 31, 2012
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A fabric for transmission belts is described that is made entirely with polyaramid fibers. Furthermore, a transmission belt is provided that comprises a body made of a first elastomeric material, in which a plurality of resistant longitudinal filiform inserts is embedded, and a working surface covered in a covering fabric comprising polyaramid fibers in weft and warp yarns; advantageously, the transmission belt is a toothed belt. According to the present invention, in use, the belt is in continuous contact with oil or partially immersed in oil.

First claim

The invention claimed is:

1. A belt for continuous contact with oil or immersion in an oil bath, said belt comprising;
a body made of a first elastomeric material,
a toothing,
a plurality of resistant longitudinal inserts embedded in the body of the belt, and
a back,
wherein said belt has a working surface and said working surface is covered with a covering fabric comprising weft and warp yarns, characterised in that said weft yarns comprise polyaramid, and said warp yarns consist of poly-meta-aramid.

2. The belt according to claim 1 , characterised in that said weft yarns are formed by an elastic yarn and by a first and second yarn.

3. The belt according to claim 2 , characterised in that said weft yarns are formed by poly-para-aramid.

4. The belt according to claim 3 , characterised in that said first yarn is a poly-para-aramid fibre yarn wound around said elastic yarn in a first direction and said second yarn is a poly-para-aramid fibre yarn wound in an opposite direction around said first yarn.

5. The belt according to claim 1 , characterised in that said transmission belt is a toothed belt.

6. The belt according to claim 1 , characterised in that said back is covered with said covering fabric.

7. The belt according to claim 1 , characterised in that said first elastomeric material is obtained from a diene monomer and a nitrile-group containing monomer.

8. The belt according to claim 7 , characterised in that said nitrile groups are in a percentage in the range between 33 and 51 percent by weight.

9. The belt according to claim 7 , characterised in that said first elastomeric material is selected from the group consisting of NBR, HNBR, XHNBR or mixtures thereof.

10. The belt according to claim 9 , characterised in that said first elastomeric material comprises a polymer containing an unsaturated carboxylic acid and/or a salt of an unsaturated carboxylic acid.

11. The belt according to claim 1 , characterised in that said fabric is subjected to a first treatment and to a second treatment.

12. The belt according to claim 11 , characterised in that said first treatment comprises polyisocyanates.

13. The belt according to claim 12 , characterised by comprising a third treatment.

14. The belt according to claim 13 , characterised in that said third treatment comprises an elastomer selected from the group consisting of NBR, HNBR, XHNBR or mixtures thereof.

15. The belt according to claim 13 , characterised by comprising a fourth treatment.

16. The belt according to claim 11 , characterised in that said second treatment comprises an adhesive.

17. A timing control system for a motor vehicle comprising at least one drive pulley, a driven pulley and means adapted to continuously maintain a belt according to claim 1 in contact with oil or immersed in oil.

Assignees

• Dayco Europe Srl
• Dayco Europe Srl

Inventors

• Di Meco Marco
• Baldovino Carlo
• Petaccia Marino

Classifications

• F16G1/28

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

• F16G9/04

  made of rubber or plastics (F16G9/02 takes precedence) · CPC title

• F16G1/10 Primary

  with textile reinforcement · CPC title

• F16H57/0489

  with endless flexible members, e.g. belt CVTs · CPC title