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Electric pump

  • US 10,451,074 B2
  • Filed: 09/22/2016
  • Issued: 10/22/2019
  • Est. Priority Date: 09/30/2015
  • Status: Active Grant
First Claim
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1. An electric pump, comprising a housing, a shaft and a rotor assembly, a chamber being formed in the housing, and the rotor assembly being arranged in the chamber, wherein:

  • the shaft comprises a first portion and a second portion, the first portion is fixed to the housing, and the second portion is in non-direct contact with the housing;

    the rotor assembly is rotatable about the shaft, and the rotor assembly is sleeved on the shaft;

    the electric pump comprises a stop assembly, the stop assembly is configured to limit a position of the rotor assembly in the chamber and comprises a first stop and a second stop; and

    the first stop is configured to limit a position of the rotor assembly moving along the shaft in a direction away from the first portion, and the second stop is configured to limit a position of the rotor assembly moving along the shaft in a direction towards the first portion, the first stop is fixed to the second portion, and the second stop is fixed to the first portion;

    wherein the first stop comprises a connecting element and a stop element, the connecting element is fixed to the second portion, and the stop element is arranged between the connecting element and the second portion and is pressed onto the second portion;

    wherein the shaft comprises a connecting portion, and the connecting element is connected to the shaft via the connecting portion;

    the connecting portion comprises a threaded hole, and the threaded hole extends into the second portion; and

    the connecting element comprises a screw, the screw is in a threaded connection with the shaft, and the stop element is pressed onto the second portion of the shaft by the screw; and

    wherein a hole is provided in the stop element, the hole is smaller than an outer edge of the second portion, and a size of an outer edge of the stop element is larger than a size of an outer periphery of the second portion.

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