Cogged V-belt and transmission system using same

Patent metadata

Field	Value
Publication number	US-10436286-B2
Application number	US-201816195663-A
Country	US
Kind code	B2
Filing date	Nov 19, 2018
Priority date	May 20, 2016
Publication date	Oct 8, 2019
Grant date	Oct 8, 2019

Abstract

An inner peripheral surface of a belt is cogged so that cogs extend in a belt width direction and are arranged adjacent to one another at regular intervals in a belt length direction. A tip portion of the cog and a bottom portion of a groove formed between the cogs have curved surfaces each having an arc-shaped cross section. A curvature radius of a cross-sectional shape of the bottom portion of the groove is set to be larger than a curvature radius of a cross-sectional shape of the tip portion of the cog.

First claim

What is claimed is:

1. A cogged V-belt, an inner peripheral surface of which is cogged to have a plurality of cogs extending in a belt width direction and arranged adjacent to one another at regular intervals in a belt length direction, wherein
a groove is formed between the cogs adjacent to each other, the groove being recessed in an opposite direction to a protruding direction of the cogs,
a tip portion in the protruding direction of the cog and a bottom portion of the groove have curved surfaces each having an arc-shaped cross section,
a curvature radius of a cross-sectional shape of the bottom portion of the groove is larger than a curvature radius of a cross-sectional shape of the tip portion of the cog,
the cogged V-belt includes a cord buried portion in which a cord is buried, and a compressed portion provided on a side of the cord buried portion toward the inner peripheral surface,
the compressed portion has the cogs and the groove:
the tip portions of the cogs are connected with the bottom portion of the groove between the cogs via planar surfaces located between the respective tip portions of the cogs and the bottom portion of the groove, and
an intersection angle between the planar surfaces on both sides of the groove is 20° or more and 30° or less.

2. The cogged V-belt of claim 1 , wherein
each of the cogs is formed so as to be plane-symmetrical to a symmetry plane that is perpendicular to the belt length direction and passes through a middle portion in a thickness direction of the cog.

3. The cogged V-belt of claim 1 , wherein
the cord buried portion includes an adhesive rubber layer made of a rubber composition, and
the compressed portion is made of a rubber composition.

4. A power transmission system in which the cogged V-belt of claim 1 is wrapped around a plurality of pulleys.

Assignees

• Bando Chemical Ind

Inventors

• Matsukawa Hirokazu

Classifications

• F16G5/20 Primary

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

• F16G5/08

  with textile reinforcement · CPC title

• F16H7/023

  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

• B32B3/263

  characterised by a layer having non-uniform thickness · CPC title

• B32B2433/04

  Driving belts · CPC title