Scissor lift descent control systems and methods
AssigneeOshkosh Corporation
InventorsLouis Bafile, Eko Prasetiawan
Life of this patent
Estimating the term…
Abstract
A fully-electric lift vehicle comprises a base, a battery, a scissor lift movable between an extended position and a retracted position, a work platform the scissor lift, a linear actuator including an electric motor powered by the battery, an electromagnetic brake coupled to the electric motor; and a manual release coupled to the electromagnetic brake so that, in the event of a power failure, actuation of the manual release enables the scissor lift to descend toward the retracted position. The electric motor is configured to act like a generator and reduce a descent speed of the scissor lift during the descend toward the retracted position.
Claims14
A fully-electric lift vehicle comprising:
- a base;
- a battery arranged within the base;
- a drive motor powered by the battery and configured to drive a wheel;
- a scissor lift including a first end coupled to the base, the scissor lift being movable between an extended position and a retracted position;
- a work platform supported on a second end of the scissor lift;
- a linear actuator including an electric motor powered by the battery, wherein the linear actuator is coupled to the scissor lift so that rotation of the electric motor moves the scissor lift between the extended position and the retracted position;
- an electromagnetic brake coupled to the electric motor;
- and
- a manual release coupled to the electromagnetic brake so that, in the event of a power failure, actuation of the manual release enables the scissor lift to descend toward the retracted position, wherein the electric motor is configured to act like a generator and reduce a descent speed of the scissor lift during the descend toward the retracted position.
A fully-electric lift vehicle comprising:
- a base;
- a battery arranged within the base;
- a drive motor powered by the battery and configured to drive a wheel;
- a scissor lift including a first end coupled to the base, the scissor lift being movable between an extended position and a retracted position;
- a work platform supported on a second end of the scissor lift;
- a linear actuator powered by the battery and configured to move the scissor lift between the extended position and the retracted position;
- an electromagnetic brake;
- a manual release coupled to the electromagnetic brake so that, in the event of a power failure, actuation of the manual release enables the scissor lift to descend toward the retracted position;
- and
- a permanent magnet motor configured to act like a generator and reduce a descent speed of the scissor lift during the descend toward the retracted position.
Dependencies are inferred from the claim text.