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Title:
ROTARY SHAFT MEMBER SUPPORTING DEVICE AND GRINDER
Document Type and Number:
Japanese Patent JP2020020348
Kind Code:
A
Abstract:
To provide a rotary shaft member supporting device having a static pressure fluid bearing which enables efficient supply and flow of lubricating oil in a simple construction to suppress the seizure of the static pressure fluid bearing.SOLUTION: A rotary shaft member supporting device 70 includes a bearing 90 having a static pressure pocket 94 recessed in a bearing surface 93 of a bearing member 92 opposed to the outer peripheral face of a rotary shaft member 72, the bearing 90 including an axial groove 96 which is provided in a dynamic pressure generation land 95 along the axial direction so as to be located adjacent to a first static pressure pocket part 94a and communicated with the first static pressure pocket part 94a, and of which the depth in the radial direction of the bearing surface 93 is sufficiently smaller than the depth in the radial direction of the first static pressure pocket part 94a for storing lubricating oil supplied from a supply port 94c to the first static pressure pocket part 94a so that the stored lubricating oil flows in between the rotary shaft member 72 and the dynamic pressure generation land 95.SELECTED DRAWING: Figure 4

Inventors:
YAMATO HIROKI
ARAKAWA NAOYA
Application Number:
JP2018142137A
Publication Date:
February 06, 2020
Filing Date:
July 30, 2018
Export Citation:
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Assignee:
JTEKT CORP
International Classes:
F16C32/06; B24B5/00; B24B41/04; B24B47/14; B24B47/26
Attorney, Agent or Firm:
特許業務法人 共立