speed reducer
The cycloidal speed reducer addresses the issue of vibrations and noise in industrial robots by using shim members to apply preload to bearings and covers, enhancing rigidity and reducing noise in a compact form.
JP7864240B1Active Publication Date: 2026-05-22菅野 正之
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Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- 菅野 正之
- Filing Date
- 2025-10-23
- Publication Date
- 2026-05-22
AI Technical Summary
Technical Problem
Cycloidal speed reducers in industrial robots lack a compact and effective soundproofing and vibration damping mechanism, leading to significant vibrations and noise during operation.
Method used
A cycloidal speed reducer design incorporating a case with an internal gear, an eccentric shaft, and planetary gears, utilizing shim members made of vibration-damping alloy to apply preload to bearings and cover, thereby suppressing vibrations and noise.
Benefits of technology
The design effectively suppresses vibrations and noise by preventing bearing slippage and enhancing rigidity, ensuring stable rotation and reducing operational noise.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure 0007864240000001_ABST
Abstract
To provide a small and compact gearbox that can effectively suppress vibrations and noise generated during operation. [Solution] The reducer 1 comprises a case 3 with a circular inner surface on which a plurality of outer peripheral pins 31 are provided, an eccentric shaft 2 positioned at the center of the case 3 and converting input rotation into eccentric rotation, and a planetary gear 4 attached to the eccentric shaft 2 via a needle roller bearing 10, with some of its external teeth engaging with the outer peripheral pins 31 and housed in the case 3. Shim rings 11 are provided at both ends in the height direction of the needle roller bearing 10 attached to the eccentric shaft 2, and the shim rings 11 prevent the needle roller bearing 10 from spinning freely and suppress the generation of minute vibrations and noise.
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