Hydrostatic drive system with variable vibration damper
AssigneeKinetics Drive Solutions Inc.
InventorsGerald Dyck, Paul Dries, Ron Scheper, Benjamin Starkey, John Czepak
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Abstract
A hydrostatic drive system is disclosed which allows for simpler and more robust control of hydraulic vibration. The system comprises first and second hydraulic drive units and a variable damping device. At least the first hydraulic drive unit is a variable displacement type and comprises a displacement control. The variable damping device comprises at least one variable element. The system comprises a first linkage apparatus between the displacement control and the variable element and is operable to control the variable element in accordance with the displacement of the displacement control.
Claims24
A hydrostatic drive system comprising:
- a first hydraulic drive wherein the first hydraulic drive is a variable displacement hydraulic drive comprising a first displacement control coupled to control a displacement of the first hydraulic drive;
- a second hydraulic drive;
- a first drive shaft connected to the first hydraulic drive;
- a second drive shaft connected to the second hydraulic drive;
- a first fluid line fluidly connecting the first hydraulic drive to the second hydraulic drive;
- a variable damping device connected to the first fluid line and fluidly connected to the first and second hydraulic drives, wherein the variable damping device comprises at least one variable element that provides a variation in an attenuation frequency of the variable damping device;
- and
- a first linkage between the first displacement control of the first hydraulic drive and the variable element of the variable damping device and operable to control the variable element in accordance with the displacement of the first displacement control.
A method for attenuating vibration in a hydrostatic drive system, the hydrostatic drive system comprising:
- a first hydraulic drive wherein the first hydraulic drive is a variable displacement hydraulic drive;
- a second hydraulic drive;
- a first drive shaft connected to the first hydraulic drive;
- a second drive shaft connected to the second hydraulic drive;
- a first fluid line fluidly connecting the first hydraulic drive to the second hydraulic drive;
- a variable damping device connected to the first fluid line and fluidly connected to the first and second hydraulic drives, wherein the variable damping device comprises at least one variable element that provides variation in an attenuation frequency of the variable damping device,
- the method comprising:
- incorporating a first displacement control that controls a displacement of the first hydraulic drive into the variable displacement first hydraulic drive;
- incorporating a first linkage between the first displacement control of the first hydraulic drive and the variable element of the variable damping device;
- and
- controlling the variable element in accordance with the displacement of the first displacement control.
Dependencies are inferred from the claim text.