An automotive battery lifting device is used for assembling a battery unit to the vehicle body from a bottom surface side of the vehicle body, including: a battery carrier tray having a carrier surface for mounting the battery unit; a lifting mechanism, the lifting mechanism being used for moving the battery carrier tray along a lifting direction; and a plurality of cylinders for adjusting a horizontal inclination of the carrier surface of the battery carrier tray, when the lifting mechanism raises the battery carrier tray and the battery unit or the battery carrier tray contacts the vehicle body at a first position, air in at least the cylinder close to the first position is discharged.

An automotive battery lifting device is used for assembling a battery unit to the vehicle body from a bottom surface side of the vehicle body, including: a battery carrier tray having a carrier surface for mounting the battery unit; a lifting mechanism, the lifting mechanism being used for moving the battery carrier tray along a lifting direction; and a plurality of cylinders for adjusting a horizontal inclination of the carrier surface of the battery carrier tray, when the lifting mechanism raises the battery carrier tray and the battery unit or the battery carrier tray contacts the vehicle body at a first position, air in at least the cylinder close to the first position is discharged.

A method and apparatus for reducing a positive pressure of an actuating cylinder of a universal hinged support. An application object is the actuating cylinder of the universal hinged support. The apparatus comprises a foundation, a base frame, a force application apparatus, a direction adaptation apparatus, a universal swing rod apparatus, and an integral external connection apparatus. The method comprises: step 1, determining main design parameters and the type of the force application apparatus; step 2, structural design of the apparatus: designing the structure of the apparatus after the main design parameters and the type of the force application apparatus are determined; and step 3, calculating, testing, and evaluating an actual gravity moment or positive pressure and an effect of weight compensation, determining whether to meet design requirements, and calculating or testing the evaluated gravity moment and a reduction ratio.

A method and apparatus for reducing a positive pressure of an actuating cylinder of a universal hinged support. An application object is the actuating cylinder of the universal hinged support. The apparatus comprises a foundation, a base frame, a force application apparatus, a direction adaptation apparatus, a universal swing rod apparatus, and an integral external connection apparatus. The method comprises: step 1, determining main design parameters and the type of the force application apparatus; step 2, structural design of the apparatus: designing the structure of the apparatus after the main design parameters and the type of the force application apparatus are determined; and step 3, calculating, testing, and evaluating an actual gravity moment or positive pressure and an effect of weight compensation, determining whether to meet design requirements, and calculating or testing the evaluated gravity moment and a reduction ratio.