Closed hydraulic damper

Closed hydraulic damper

  • CN 2,580,206 Y
  • Filed: 09/06/2002
  • Issued: 10/15/2003
  • Est. Priority Date: 09/06/2002
  • Status: Active Grant
First Claim
Patent Images

1. closed hydraulic pressure damper, contain oil hydraulic cylinder, piston, piston rod, the outer end of piston rod is provided with the connecting pin head, piston is divided into rod chamber and rodless cavity with oil hydraulic cylinder, it is characterized in that rod chamber (2) and rodless cavity (5) are connected by the main valve in the tail end groove that is installed in piston rod, main valve is by valve pocket (42), two spools (41), (44) and spring (43) form, the T type hole (1-1 of spool (41) wherein by opening at piston rod (1), 1-2) communicates with the rod chamber (2) of oil hydraulic cylinder, another spool (44) communicates with the rodless cavity (3-1) of oil hydraulic cylinder by the center hole (3-1) of piston (3), two spools at least respectively have an oilhole (41-1), (44-1), the both ends of the surface of valve pocket have radially groove, and outer side surface has the axial groove that communicates with it.

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