Electronic vacuum pump for automobile brake boosting

Electronic vacuum pump for automobile brake boosting

  • CN 105,822,550 B
  • Filed: 05/19/2016
  • Issued: 03/24/2020
  • Est. Priority Date: 05/19/2016
  • Status: Active Grant
First Claim
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1. The utility model provides an electronic vacuum pump for automobile brake helping hand, it mainly includes ring flange and output shaft, its characterized in that:

  • one side of the flange is connected with a pump cavity, a pump cover is sleeved outside the pump cavity, and a silencing cap is arranged between the pump cover and the pump cavity;

    the pump cavity is formed by connecting a stator, upper and lower cover plates arranged on two sides of the stator and a rotor arranged in the stator, wherein five blade grooves are formed in the rotor, a blade is respectively arranged in each blade groove, and the blade grooves are unevenly distributed along the rotor, so that the rotor and the blades divide the pump cavity into independent air chambers with different sizes;

    the shaft hole of the rotor adopts a stepped structure, wherein the stepped structure is formed by splicing an upper section, a middle section and a lower section in the axial direction, and the diameter of the middle section is smaller than that of the upper section and the lower section;

    the upper and lower cover plates are respectively provided with an upper and a lower drainage grooves, the drainage grooves are in an arc shape, the two ends of the groove body are narrow and the middle of the groove body is wide, the two ends are provided with triangular drainage ends, the middle of the upper drainage groove is provided with an upper cover plate air outlet, the middle of the lower drainage groove is provided with a lower cover plate air inlet, the center distance of each blade groove in the rotor is 9 +/-0.5 mm, and the included angle between each blade groove and the circumferential line of the rotor is 43 +/-3 degrees.

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