LEVELING JACK WITH DIRECT ACTUATION

摘要

A leveling and stabilizing jack includes an intermediate member joining first and second lifting sections. Each lifting section includes a cross beam, a leg, a brace, a foot, a motor and a drive screw. The motor powers the drive screw, which is operably associated with the leg, to cause the leg to extend away from or retract toward the cross beam depending on the motor's direction of rotation. A motor control can control the motor of each of the lifting sections independently in a manner that results in leveling of the jack when deployed.

主权项

1. A jack comprising:
a first lifting section, the first lifting section comprising:
a first cross beam;a first trunnion engaged with the first cross beam and selectively displaceable in first and second displacement directions with respect to the first cross beam between a first position and a second position;a first leg pivotally connected to the first trunnion; anda first brace pivotally connected to the first leg and pivotally connected to the first cross beam;a first drive mechanism operably engaged with the first trunnion, the first drive mechanism configured to selectively displace the first trunnion in the first and second displacement directions with respect to the first cross beam, the first drive mechanism comprising:
a first drive screw;a first drive nut threadingly engaged with the first drive screw;a first drive plate engaged with the first drive nut and the first trunnion such that rotation of the first drive screw in a first direction of rotation results in displacement of the first drive nut, the first drive plate, and the first trunnion in the first displacement direction with respect to the first cross beam and rotation of the first drive screw in a second direction of rotation results in displacement of the first drive nut, the first drive plate, and the first trunnion in the second displacement direction with respect to the first cross beam.