Harzzahnrad

Details

Veröffentlichungs-Nr.

EP4800266

Anmeldetag

25. Oktober 2024

Veröffentlichung

1. Mai 2025

Rechtsraum

EP

IPC

F16H55/06, B62D5/04, F16H55/22

Abstract

Provided is a resin gear capable of suppressing the occurrence of damage on a tooth surface, thereby improving durability and prolonging a service life. The resin gear has a tooth part made of a resin material. Fatigue crack development speed da/dN of the resin material is measured in accordance with ASTM E647, and in a case where a crack development speed is represented by a double logarithmic graph given that the vertical axis is a crack development speed and the horizontal axis is a value (ΔK/E) obtained by dividing a stress expansion coefficient range ΔK by a Young's modulus E of the resin material, a fatigue crack development speed da/dN (mm/cycle) calculated by the relational expression in a range of ΔK/E<7 × 10-4[√m] is equal to or less than a value A calculated using formula (3). In formula (3), ΔK is a value obtained using the formula described in ASTM E647.

Anmelder

Firmen

NSK Ltd.
NSK Steering & Control, Inc.

Land

🇯🇵 Japan

Fachgebiete