发明申请
- 专利标题: Self-pumping hydropneumatic spring-damper unit
- 专利标题(中): 自抽式液压气动弹簧减震器
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申请号: US12221222申请日: 2008-07-31
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公开(公告)号: US20090033009A1公开(公告)日: 2009-02-05
- 发明人: Holger Kirchner , Klaus Schmitz , Hubert Beck
- 申请人: Holger Kirchner , Klaus Schmitz , Hubert Beck
- 申请人地址: DE Friedrichshafen
- 专利权人: ZF Friedrichshafen AG
- 当前专利权人: ZF Friedrichshafen AG
- 当前专利权人地址: DE Friedrichshafen
- 优先权: DE102007036102.7 20070801
- 主分类号: F16F9/18
- IPC分类号: F16F9/18
摘要:
A self-pumping hydropneumatic spring-damper unit with internal leveling control is provided. The spring-damper unit has an oil-filled work cylinder under pressure by gas cushions. A damping piston is displaceable in the work cylinder and arranged at the end of a hollow piston rod whose hollow space serves to receive a pump by means of a pump rod fastened to the work cylinder. Damping medium is sucked out of a reservoir space when the piston rod moves outward and is conveyed into the work space when the piston rod moves inward. The pump rod has a control opening and, at a distance therefrom, an outlet bore for pressure equilibrium between work spaces in the work cylinder. At least one pressure-dependent throttle point is provided in the pump space between the high-pressure and low-pressure gas cushions. A first flow connection in the pump rod provided with at least one check valve connects the low-pressure gas cushion to the pump space. A second flow connection having the throttle point is connected to the work space by the outlet bore.