RPM REDUCERS AND HEAT TREATMENT PROCEDURES
Laser quenching and annealing techniques in speed reducers create high-hardness regions on sealing and rolling sections, addressing manufacturing cost challenges and enhancing durability.
DE102022107125B4Active Publication Date: 2026-04-16SUMITOMO HEAVY IND LTD
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Patent Information
- Application Number
- DE102022107125
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2021-03-29
- Filing Date
- 2022-03-25
- Publication Date
- 2026-04-16
- Estimated Expiration
- 2042-03-25
AI Technical Summary
Technical Problem
Existing speed reducers, such as eccentrically oscillating and bending-engagement types, face challenges in reducing manufacturing costs while ensuring high hardness of sealing sections that come into contact with oil seals.
Method used
Implementing a laser quenching process to create high-hardness regions on sealing and rolling sections of rotating bodies, accompanied by low-hardness regions in low-load areas, aligned circumferentially, using partial quenching and annealing techniques.
Benefits of technology
Reduces manufacturing costs by optimizing hardness distribution, enhancing fatigue strength and abrasion resistance, and improving the durability of sealing and rolling sections.
✦ Generated by Eureka AI based on patent content.
Abstract
Speed reducer (10) of the eccentrically oscillating type, comprising: a crankshaft (14) which is a rotating body (12), wherein the rotating body (12) contains a sealing section (60A, 60B) with which an oil seal (28A, 28B) comes into contact, a region (72) with high hardness is provided by laser quenching on the sealing section (60A, 60B), and a region (74, 76) with low hardness, which has a lower hardness than the region (72) with high hardness, is provided on an outer surface section of the body of revolution (12).
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