Bearing unit and motor using the same

Bearing unit and motor using the same

  • CN 101,126,412 B
  • Filed: 07/05/2007
  • Issued: 04/18/2012
  • Est. Priority Date: 07/05/2006
  • Status: Active Grant
First Claim
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1. bearing unit, it comprises:

  • Be configured to along the radial bearing of circumferential back shaft;

    Be configured to along the thrust-bearing of an end of thrust direction back shaft;

    The path that is arranged on said radial bearing and the said thrust-bearing outside forms parts;

    Under closed state, be used to hold the shell that said path forms parts, this shell has the axle pilot hole of the said axle of assembling;

    Be filled in the viscous fluid in the said shell;

    Communication path, it is first distolateral and second distolaterally be communicated with along thrust direction with axle, and communication path forms in said path between parts and the said radial bearing from said radial bearing protrusion;

    Said communication path has;

    be formed on the axial path on the perimeter surface of said radial bearing vertically;

    Be formed on first distolateral lip-deep first end side path of said radial bearing, and second distolateral lip-deep second end side path that is formed on said radial bearing, said first end side path;

    The axial path and second end side path;

    They are according to the order setting from the non-opening end of axle to the axle opening end, thus when lubricant oil from the non-opening end of axle to axle opening end circulation time, it can make residual gas flow to an opening end thus;

    Even the particle of residual gas accumulates in the bubble size that increases residual gas together and progressively, wherein;

    Said second end side path is made up of a plurality of convexities, and these convex to form on one of surface of second distolateral surface of said radial bearing and the said shell relative with the second distolateral surface of said radial bearing,The cross-section area of the cross section of said second end side path is greater than the cross-section area of said axial path,The cross-section area of the cross section of said axial path is bigger than the cross-section area of said first end side path,The groove depth of said second end side path is arranged to greater than that less in the well width of axial path and slot length size, and this reduced size has determined to pass through the bubble particles degree of axial path,The groove depth of said first end side path is less than the slot length of said axial path, and said slot length is the degree of depth of the outer surface of slot pitch radial bearing.

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