Title:
ROTATION DRIVE DEVICE AND INDICATOR INSTRUMENT FOR VEHICLES
Document Type and Number:
Japanese Patent JP2021067536
Kind Code:
A
Abstract:
To suppress oil from wrapping around to the inner circumference of an output shaft before a rotor is inserted into the output shaft.SOLUTION: An output shaft 637 is of a cylindrical shape having an insertion hole 637a into which a rotor 4 is insertable and is driven to rotate by a drive source D. A bearing 85 slidably supports the output shaft 637 from the outer circumferential side. The output shaft 637 includes a press-fit fixing part 81, an outer circumferential part 83 and at least one groove 80a, 84a. The press-fit fixing part 81 is provided on the inner circumferential face that forms the insertion hole 637a and fixes the rotor 4 by press-fitting so as to be rotatable integrally with the output shaft 637. The outer circumferential part 83 is provided on the outer circumferential face of the output shaft 637 and comes in contact with the bearing 85 via an oil therebetween. The at least one groove 80a, 84a is formed in an interval from the outer circumferential part 83 on the surface of the output shaft 637 to the press-fit fixing part 81 and extends along the direction of rotation of the output shaft 637.SELECTED DRAWING: Figure 5
Inventors:
SASAKI TATSUYA
Application Number:
JP2019192247A
Publication Date:
April 30, 2021
Filing Date:
October 21, 2019
Export Citation:
Assignee:
DENSO CORP
International Classes:
G01P1/04; B60K35/00; G01D13/22; H02K37/24
Attorney, Agent or Firm:
Nagoya International Patent Service Corporation