Motor

  • US 11,088,587 B2
  • Filed: 10/25/2017
  • Issued: 08/10/2021
  • Est. Priority Date: 10/26/2016
  • Status: Active Grant
First Claim
Patent Images

1. A motor comprising:

  • a rotor having a rotation shaft and a drive magnet;

    a stator which is formed in a tube shape and is disposed on an outer peripheral side of the rotor;

    a resin sealing member made of a resin, wherein one direction in an axial direction of the rotor is referred to as a first direction and a direction opposite to the first direction is referred to as a second direction, and the resin sealing member at least covers a side in the second direction of the stator and the outer peripheral side of the stator; and

    a cover member which is fixed to an end side in the first direction of the resin sealing member and supports the rotation shaft,wherein the resin sealing member is formed with a plurality of protrusions which protrude from an outer peripheral face of the resin sealing member toward an outer side in a radial direction of the rotor,wherein a portion of the cover member on a side in the second direction is formed to be a cover part in a tube shape which covers the resin sealing member from an outer peripheral side,wherein the cover part is formed witha plurality of notch sections which are cut out from an end in the second direction of the cover part to the first direction,a plurality of engagement grooves which extend to one side in a circumferential direction of the rotor from respective end sides in the first direction of the plurality of notch sections and are respectively engaged with the plurality of protrusions, anda stopper which restricts a movement of the cover member to the other side in the circumferential direction in a state in which the protrusions are engaged with the engagement grooves, andwherein a width in the circumferential direction of each of the notch sections is wider than a width in the circumferential direction of each of the protrusions,wherein the stopper is formed on an other end side in the circumferential direction of one of the engagement grooves, andwhen the engagement groove where the stopper is formed is referred to as a first engagement groove, the cover part is formed with a plurality of connected parts each of which connects both ends in the axial direction on the other side in the circumferential direction of each of the engagement grooves other than the first engagement groove.

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