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CRANKSHAFT, METHOD OF ASSEMBLING THE CRANKSHAFT, ROTARY COMPRESSOR AND REFRIGERATION-CYCLE DEVICE

  • US 20200132071A1
  • Filed: 12/30/2019
  • Published: 04/30/2020
  • Est. Priority Date: 05/31/2018
  • Status: Active Grant
First Claim
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1. A crankshaft comprising:

  • a shaft portion comprising a straight axial line; and

    at least one crank portion provided in the shaft portion so as to be eccentric to the axial line of the shaft portion,the at least one crank portion being formed from a crank piece, which is an element separate from the shaft portion, and the crank piece comprising a fitting hole in which the shaft portion is fit by predetermined “

    interference”

    , and a slit-like slot one end of which is opened in an inner circumferential surface of the fitting hole, and an other end of which extends along a diametric direction of the fitting hole so as to be closed inside the crank piece, and is opened in both end surfaces of the crank piece,the fitting hole being deformed so as to expand a diameter of the fitting hole when expanding a width of the slot, and the shaft portion being fit in the fitting hole of the crank piece by the predetermined “

    interference”

    when the shaft portion is inserted in the deformed fitting hole and the fitting hole restores an original form while the shaft portion is in the fitting hole.

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