Toothed belt and sprocket system

Patent metadata

Field	Value
Publication number	US-10161487-B2
Application number	US-201715452453-A
Country	US
Kind code	B2
Filing date	Mar 7, 2017
Priority date	Mar 7, 2017
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A belt and sprocket system comprising a tensile cord disposed within a belt body, at least two teeth projecting from the belt body, the belt comprising a pitch length measured between the at least two teeth on the belt, one of the at least two teeth having a tooth tip and a profile comprising a first radius and a second radius and a third radius disposed between a first linear segment and a second linear segment, the sprocket having a groove for receiving one of the at least two teeth, the groove profile comprising a first radius and a second radius and the third radius and a fourth radius, each of which is connected in series to the others and each of which is unequal in length to the other radii, the tooth having a width that is approximately 35% of a pitch length at 90% of a tooth height so as to result in an interference fit between the one of at least two teeth and groove at 90% of the tooth height; and a volume between the tooth tip and the groove.

First claim

What is claimed is:

1. A belt and sprocket system comprising:
a tensile cord disposed within a belt body;
at least two teeth projecting from the belt body;
the belt comprising a pitch length measured between the at least two teeth on the belt;
one of the at least two teeth having a tooth tip and a profile comprising a first radius and a second radius and a third radius disposed between a first linear segment and a second linear segment;
the sprocket having a groove for receiving one of the at least two teeth, the groove profile comprising a first radius and a second radius and the third radius and a fourth radius, each of which is connected in series to the others and each of which is unequal in length to the other radii;
the tooth having a width that is approximately 35% of a pitch length at 90% of a tooth height so as to result in an interference fit between the one of at least two teeth and groove at 90% of the tooth height; and
a volume between the tooth tip and the groove.

2. The belt and sprocket system as in claim 1 , wherein the tooth height does not exceed 40% of the pitch length.

3. The belt and sprocket system as in claim 1 , wherein the one of at least two teeth comprises a tooth angle at a root of at least 11 degrees.

4. The belt and sprocket system as in claim 1 , wherein the groove comprises a depth greater than a tooth height.

5. The belt and sprocket system as in claim 1 , wherein the groove comprises a contact angle between 100 and 120 degrees at the tooth tip.

6. The belt and sprocket system as in claim 1 , wherein the groove angle is within 2 degrees of the tooth angle at a root.

7. The belt and sprocket system as in claim 1 , wherein the tooth has a width that is in the range of 15% to 20% greater than a groove width at 90% of a tooth height so as to result in an interference fit between the one of at least two teeth and groove at 90% of the tooth height.

8. A belt and sprocket system comprising:
a tensile cord disposed within a belt body;
at least two teeth projecting from the belt body;
the belt comprising a pitch length measured between the at least two teeth on the belt;
one of the at least two teeth having a tooth tip and a profile comprising a first radius and a second radius and a third radius disposed between a first linear segment and a second linear segment;
the sprocket having a groove for receiving one of the at least two teeth, the groove profile comprising a first radius and a second radius and the third radius and a fourth radius, each of which is connected in series to the others and each of which is unequal in length to the other radii;
the tooth having a width that is in the range of 15% to 20% greater than a groove width at 90% of a tooth height so as to result in an interference fit between the one of at least two teeth and groove at 90% of the tooth height; and
a reservoir between the tooth tip and the groove.

9. The belt and sprocket system as in claim 8 , wherein the tooth height does not exceed 40% of the pitch length.

10. The belt and sprocket system as in claim 8 , wherein the one of at least two teeth comprises a tooth angle at a root of at least 11 degrees.

11. The belt and sprocket system as in claim 8 , wherein the groove comprises a depth greater than a tooth height.

12. The belt and sprocket system as in claim 8 , wherein the groove comprises a groove angle between 100 and 120 degrees at the tooth tip.

13. The belt and sprocket system as in claim 8 , wherein the groove angle is within 2 degrees of the tooth angle at a root.

14. A belt comprising:
a tensile cord disposed within a belt body;
at least two teeth projecting from the belt body;
the belt comprising a pitch length measured between the at least two teeth on the belt;
one of the at least two teeth having a tooth tip and a profile comprising a first radius and a second radius and a third radius disposed between a first linear segment and a second linear segment;
the tooth having a width that is approximately 35% of a pitch length at 90% of a tooth height so as to result in an interference fit between the one of at least two teeth and groove at 90% of the tooth height.

Assignees

• Gates Corp

Inventors

• Pease Jennifer E
• Brown Leslee

Classifications

• F16G1/08

  with reinforcement bonded by the rubber · CPC title

• F16H55/171

  Toothed belt pulleys · CPC title

• F16G1/28 Primary

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

• F16H7/023 Primary

  with belts having a toothed contact surface or regularly spaced bosses or hollows for slipless or nearly slipless meshing with complementary profiled contact surface of a pulley · CPC title