Slack prevention system for a crowd rope of a power shovel
AssigneeDresser Industries, Inc.
InventorGeorge B. Baron
Life of this patent
Estimating the term…
Abstract
In a power shovel having a main frame, a front end assembly operatively connected to the main frame and a rope crowd system including a rope drum supported on the main frame, a motor supported on the main frame drivingly connected to the rope drum, a brake operatively connected to the rope drum and a rope wound on the drum and operatively connected to the front end assembly, a system for preventing the rope from becoming slack comprising apparatus responsive to an impending slack condition of the rope for actuating the drum brake thereby preventing continued pay out of the rope by the drum and apparatus responsive to motor torque in a pay-out direction for disengaging the motor from the rope drum, allowing the motor to continue to operate in the pay-out direction when said drum brake is actuated.
Claims36
In a power shovel having a main frame, a front end assembly operatively connected to said main frame and a rope crowd system including a rope drum supported on said main frame, drive means supported on said main frame drivingly connected to said rope drum, a brake operatively connected to said rope drum and a rope wound on said drum and operatively connected to said front end assembly, a system for preventing said rope from becoming slack comprising means responsive to an impending slack condition of said rope for actuating said brake drum thereby preventing continued pay out of said rope by said drum.
In a power shovel having a main frame, a front end assembly operatively connected to said main frame and a rope crowd system including a rope drum supported on said main frame, drive means supported on said main frame drivingly connected to said rope drum, a brake operatively connected to said rope drum and a rope wound on said drum and operatively connected to said front end assembly, a device for abating a slack condition of said rope comprising means responsive to a direction of torque of said drive means when paying out rope for disengaging said drive means from said drum.
In a power shovel having a main frame, a front end assembly operatively connected to said main frame and a rope crowd system including a rope drum supported on said main frame, a drive motor supported on said main frame, a planetary gear set including a sun gear, a ring gear and a plurality of planetary gears mounted on a carrier, a first of said planetary gear set components being drivingly connected to said drive motor, a second off said planetary gear set components being drivingly connected to said drum and a third reaction component being supported on said main frame, a brake drum mounted on said gear set component drivingly connected to said rope drum, and a rope wound on said drum and operatively connected to said front end assembly, a system for preventing said rope from becoming slack comprising a friction member engageable with said brake drum for arresting the rotation thereof and means responsive to an impending slack condition of said rope for causing said friction member to engage said brake drum to provide a braking action thereby preventing continued pay out of said rope by said drum.
In a power shovel having a rope crowd system including a rope drum and a drive motor, a drive assembly comprising a planetary gear set including a driven component drivingly connected to said drive motor, a drive component drivingly connected to said rope drum and a reaction component rotatably mounted on a support frame and a backstop mechanism mounted on said support frame and operatively connected to said reaction member whereby said reaction component will be restrained from rotation in one direction to transmit drive from said drive motor to said rope drum and will be permitted to rotate in the opposite direction to disengage said drive motor from said rope drum.
Dependencies are inferred from the claim text.