Title:
SPOOL DISPLACEMENT DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/048081
Kind Code:
A1
Abstract:
A spool displacement detection device (100) detects the displacement amount of a spool (53) of a fluid pressure valve device (50) that includes: an access hole (52) formed in a housing (51); and a spool (53) housed slidably in the access hole (52). The spool displacement detection device comprises: a rod (60) one end of which is supported by the spool (53); a cap (70) that is mounted in an opening of the access hole (52) with respect to an end surface (51a) of the housing (51); a magnet (65) provided to the rod (60); and a detection unit (80) that detects a change in a magnetic field accompanying the displacement of the magnet (65). The cap (70) has formed therein an insertion hole (71) into which the rod (60) is inserted in a displacement direction so as to freely reciprocate and through which a fluid for energizing the spool (53) is guided. A detection unit (80) is attached to an outer peripheral surface (70c) of the cap (70).
Inventors:
HIRUMA TATSUYA (JP)
OGAYA YOSHIKAZU (JP)
YOSHIDA NOBUYOSHI (JP)
OGAYA YOSHIKAZU (JP)
YOSHIDA NOBUYOSHI (JP)
Application Number:
PCT/JP2023/025462
Publication Date:
March 07, 2024
Filing Date:
July 10, 2023
Export Citation:
Assignee:
KYB CORP (JP)
International Classes:
G01B7/00; F16K37/00
Foreign References:
| JP2019049492A | 2019-03-28 | |||
| JP2014149188A | 2014-08-21 | |||
| JP2014130035A | 2014-07-10 |
Attorney, Agent or Firm:
GOTOH & PARTNERS (JP)
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