Toothed belt

Patent metadata

Field	Value
Publication number	US-11293518-B2
Application number	US-201816603770-A
Country	US
Kind code	B2
Filing date	Apr 23, 2018
Priority date	Apr 24, 2017
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

Provided is a toothed belt comprising: a belt body that includes a plurality of core wires; a back surface part in which the plurality of core wires are embedded; and a plurality of teeth that oppose the back surface in a belt thickness direction. The back surface part and the plurality of teeth are integrally molded using a thermoplastic elastomer. The toothed belt is characterized in that: a belt strength per 1 mm of belt width is at least 1.85 kN; a pitch of the plurality of teeth is at least 20 mm; the height of each of the plurality of teeth is at least 5 mm; and the thickness of the back surface part is at least 4 mm.

First claim

The invention claimed is:

1. A toothed belt comprising a belt body comprising plural core wires that extend in a belt longitudinal direction and are arranged in a belt width direction, a back portion in which the plural core wires are buried, and plural teeth that are opposite to the back portion in a belt thickness direction and arranged in the belt longitudinal direction so as to be spaced from each other, wherein the back portion and the plural teeth are molded integrally of a thermoplastic elastomer,
having:
a belt strength per 1-mm belt width higher than or equal to 1.85 kN;
a pitch of the plural teeth longer than or equal to 20 mm;
a height of each of the plural teeth greater than or equal to 5 mm; and
a thickness of the back portion larger than or equal to 4 mm,

wherein each of the plural core wires has a strength of 7 to 8 kN, and the plural core wires have a pitch of 3.0 to 3.7 mm and an interval of 0.4 to 1.4 mm.

2. The toothed belt according to claim 1 , wherein each of the plural core wires is constituted of a steel cord or a cord produced by twisting at least any of aramid fibers and carbon fibers.

3. The toothed belt according to claim 1 , wherein each of the plural core wires:
is constituted of a steel cord; and
has a diameter of 2.3 to 2.6 mm.

4. The toothed belt according to claim 1 , wherein the thermoplastic elastomer is at least one selected from the group consisting of: a polyurethane thermoplastic elastomer; a polyester thermoplastic elastomer; a polystyrene thermoplastic elastomer; a polyolefin thermoplastic elastomer; a polyamide thermoplastic elastomer; and a vinyl chloride thermoplastic elastomer.

5. The toothed belt according to claim 1 , wherein the thermoplastic elastomer is a polyurethane thermoplastic elastomer and has a hardness of 85 to 95°.

Assignees

• Mitsuboshi Belting Ltd

Inventors

• Tamura Eiki

Classifications

• F16G1/28 Primary

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

• B29D29/08

  Toothed driving belts · CPC title

• F16G1/16 Primary

  with reinforcement bonded by the plastic material {(making thereof B32B)} · CPC title

• F16G1/12

  with metal reinforcement · CPC title

• F16G1/14

  made of plastics (F16G1/28 takes precedence {; consisting of several parts F16G1/22}; making thereof B29D29/00 ) · CPC title