Title:
磁気式ロータリエンコーダ及び転がり軸受ユニット
Document Type and Number:
Japanese Patent JP7287080
Kind Code:
B2
Abstract:
To provide a magnetic rotary encoder which prevents cracks in a magnetic part even when having been repeatedly exposed to high temperature environment and low temperature environment.SOLUTION: A magnetic rotary encoder 20 includes a magnet part 21 in which a magnetic resin material containing magnetic substance powder, a polyamide resin, an amine-based antioxidant and 2-mercaptobenzimidazole is toroidally formed, and a slinger 22 that is an annular member joined to the magnet part 21. The polyamide resin has a water absorption ratio of 0.7 mass% or less when being left in the water at 23°C for 24 hours. A mass ratio of the content of the amine-based antioxidant and a content of the 2-mercaptobenzimidazole is 2:1 to 1:2.SELECTED DRAWING: Figure 1
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Inventors:
Yuki Kasahara
Application Number:
JP2019075756A
Publication Date:
June 06, 2023
Filing Date:
April 11, 2019
Export Citation:
Assignee:
Nippon Seiko Co., Ltd.
International Classes:
G01D5/245; F16C19/38; F16C33/78; F16C41/00; G01B7/30
Domestic Patent References:
| JP20073223A | ||||
| JP2013203823A | ||||
| JP200940954A | ||||
| JP201066513A | ||||
| JP9323972A | ||||
| JP4189803A | ||||
| JP200591404A | ||||
| JP2000298368A | ||||
| JP2014227460A | ||||
| JP11312418A |
Attorney, Agent or Firm:
田中 秀▲てつ▼
Hajime Hirose
Tetsuya Mori
Hajime Hirose
Tetsuya Mori
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