| 摘要 |
Apparatus for resisting relative rotation between a railway truck and a car body which is supported by the truck and is relatively rotatable with respect thereto about a generally vertical axis, the apparatus comprising: a hydraulic chamber (40); a piston and; a piston head (38) dividing the hydraulic chamber (40) into a pair of variable volume chambers (52,54); means for connecting the hydraulic chamber (40) to one of the truck and the car body, and for connecting the piston means (28) to the other of the truck and the car body; pressure generating means (64) cooperable with the variable volume chambers (52,54) to maintain hydraulic fluid in the variable volume chambers (52,54) at a positive fluid pressure when the volumes of the variable volume chambers (52,54) are not varying; and pressure varying means (60) cooperable with the pressure generating means (64) and the variable volume chambers (52,54) to cause the pressure of the incompressible fluid in the respective variable volume chambers to deviate in opposed pressure increments from the positive fluid pressure in response to relative rotation between the truck and car body to create a pressure differential which acts on the piston means (28) and on the hydraulic chamber (40) to resist such relative rotation. |
