Rotary joint
The rotary joint design addresses the issue of measurement accuracy loss by enabling the magnetic sensor to move parallel to pressure, ensuring precision through a guide portion and annular weak point, thus maintaining accuracy under high pressure.
JP2026084727APending Publication Date: 2026-05-22NACHI FUJIKOSHI CORP
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Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- NACHI FUJIKOSHI CORP
- Filing Date
- 2024-11-12
- Publication Date
- 2026-05-22
Smart Images
Figure 2026084727000001_ABST
Abstract
Rotary joints can suppress the decrease in measurement accuracy when pressure is applied to the magnetic sensor. [Solution] The rotary coupling (1) comprises a rotor (12), a shaft (13) with a through-hole formed therein, a rod (14), a case (16), and a magnetic sensor (161). The rod is provided in the hole (132) so as to extend from one end of the shaft in a first direction along the central axis of the rotor. The case is housed in the hole at the other end of the shaft and is formed in a hollow cylindrical shape, and is provided with a guide portion (1622) that guides the magnetic sensor to move along the first direction when it is pressed and moved in the first direction within the hole. The magnetic sensor is provided in the case such that its measuring surface (1610) faces the end of the rod corresponding to the other end of the shaft, and measures the rotation angle with the central axis between the rod and the shaft as the axis of rotation.
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