US 12,078,168 B2
Compressor and method for manufacturing compressor
Yoshitaka Akiyama, Kariya (JP); Yasuhiro Oki, Kariya (JP); Tadashi Hotta, Kariya (JP); Toyohiro Kanou, Kariya (JP); and Yuu Sugimoto, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Jan. 20, 2023, as Appl. No. 18/157,261.
Application 18/157,261 is a continuation of application No. PCT/JP2021/026024, filed on Jul. 9, 2021.
Claims priority of application No. 2020-133286 (JP), filed on Aug. 5, 2020.
Prior Publication US 2023/0151813 A1, May 18, 2023
Int. Cl. F04C 18/02 (2006.01); F04C 29/00 (2006.01)
CPC F04C 18/0215 (2013.01) [F04C 29/005 (2013.01); F04C 2230/603 (2013.01); F04C 2240/52 (2013.01); F04C 2240/60 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A compressor comprising:
a compression mechanism that is configured to compress fluid;
an electric motor unit that is configured to output a drive force which drives the compression mechanism;
a drive shaft that is configured to transmit the drive force, which is outputted from the electric motor unit, to the compression mechanism; and
a housing that receives the compression mechanism, the electric motor unit and the drive shaft, wherein:
the housing includes a first housing, which is shaped in a bottomed tubular form and has an opening on one side in an axial direction of the drive shaft, and a second housing, which covers the opening of the first housing;
a portion of the drive shaft, which is located on the one side in the axial direction, is rotatably supported by a main bearing, which is formed integrally in one-piece with or is fixed to a main bearing member of the compression mechanism;
another portion of the drive shaft, which is located on another side in the axial direction, is rotatably supported by a sub-bearing, which is formed integrally in one-piece with or is fixed to an inside of a body portion of a sub-bearing member, the body portion being shaped in a tubular form;
the compression mechanism, which includes the main bearing member, is placed at an inside of a tubular portion of the first housing;
the sub-bearing member is formed separately from the first housing and is fixed to a bottom surface of a bottom portion of the first housing;
the sub-bearing member is fixed to the bottom surface of the bottom portion by a fastening bolt;
the compressor comprises a sub-bearing aligning structure that is configured to coaxially align a central axis of the sub-bearing and a central axis of an inner circumferential surface of an insertion section of the tubular portion, the insertion section being a section of the tubular portion to which the compression mechanism is inserted;
the sub-bearing aligning structure includes a fitting structure, at which a projection formed at one of the first housing and the sub-bearing member is fitted into a recess formed at another one of the first housing and the sub-bearing member to position the sub-bearing member in place;
the first housing is formed integrally in one-piece; and
the sub-bearing member is entirely received in the first housing.