发明公开
EP2115305A1 HYDRAULISCHER ANTRIEB, INSBESONDERE FÜR WERKZEUGMASCHINEN, UND VERFAHREN ZUM STEUERN DES HYDRAULISCHEN ANTRIEBS 有权
液压驱动,尤其是对机床和用于控制液压驱动方法

  • 专利标题: HYDRAULISCHER ANTRIEB, INSBESONDERE FÜR WERKZEUGMASCHINEN, UND VERFAHREN ZUM STEUERN DES HYDRAULISCHEN ANTRIEBS
  • 专利标题(英): Hydraulic drive, in particular for machine tools, and method for controlling the hydraulic drive
  • 专利标题(中): 液压驱动,尤其是对机床和用于控制液压驱动方法
  • 申请号: EP08758919.8
    申请日: 2008-05-31
  • 公开(公告)号: EP2115305A1
    公开(公告)日: 2009-11-11
  • 发明人: BRAHMER, Bert
  • 申请人: Voith Patent GmbH
  • 申请人地址: Sankt Pöltener Strasse 43 89522 Heidenheim DE
  • 专利权人: Voith Patent GmbH
  • 当前专利权人: Voith Patent GmbH
  • 当前专利权人地址: Sankt Pöltener Strasse 43 89522 Heidenheim DE
  • 代理机构: Dr. Weitzel & Partner
  • 优先权: DE102007027603 20070612
  • 国际公布: WO2008151732 20081218
  • 主分类号: F15B11/044
  • IPC分类号: F15B11/044 B30B15/22
HYDRAULISCHER ANTRIEB, INSBESONDERE FÜR WERKZEUGMASCHINEN, UND VERFAHREN ZUM STEUERN DES HYDRAULISCHEN ANTRIEBS
摘要:
The invention relates to a hydraulic drive, in particular for a press or a punching or nibbling machine with a double-acting working cylinder (3.5) whose piston (3.1) has a first working surface (3.15) which acts in the retraction direction and a second working surface (3.16) which acts in the deployment direction, which first working surface (3.15) and second working surface (3.16) delimit in each case one pressure chamber, wherein at least two different pressures can be set by means of an actuating element (3.4) in order to retract and deploy the piston into and out of the working cylinder, the hydraulic drive has an actuating unit (3.10) which selectively enables a throttled return flow of hydraulic medium from the first pressure chamber (3.8) which is delimited by the first working surface. The invention is characterized in that the drive has control means (3.11,3.12), by means of which, before an abrupt acceleration of the piston on account of its being suddenly relieved of load, the actuating unit can be activated in such a way that hydraulic damping of the movement of the piston takes place by means of a throttling, effected directly or indirectly by the actuating unit, of the return flow of hydraulic medium from the first pressure chamber.
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