Methods and systems are provided for a device. In one example, the device is configured to automatically grab and slip a line. The device is further configured to decrease degradation to the line by limiting a rotation of the device via contact with the line.

A lift vehicle comprises a base having a plurality of wheels, a battery arranged within the base, a drive motor powered by the battery and configured to drive at least one of the plurality of wheels and propel the base, a retractable lift including a first end coupled to the base and being movable between an extended position and a retracted position, a work platform supported by a second end of the retractable lift, and a linear actuator having a lift motor with a rotor. The lift motor is powered by the battery, and the linear actuator is coupled to the retractable lift so that rotation of the rotor moves the retractable lift between the extended position and the retracted position. The lift vehicle further includes an electromagnetic brake coupled to a first side of the lift motor.

A lift vehicle comprises a base having a plurality of wheels, a battery arranged within the base, a drive motor powered by the battery and configured to drive at least one of the plurality of wheels and propel the base, a retractable lift including a first end coupled to the base and being movable between an extended position and a retracted position, a work platform supported by a second end of the retractable lift, and a linear actuator having a lift motor with a rotor. The lift motor is powered by the battery, and the linear actuator is coupled to the retractable lift so that rotation of the rotor moves the retractable lift between the extended position and the retracted position. The lift vehicle further includes an electromagnetic brake coupled to a first side of the lift motor.

An actuation system includes a power drive unit that drives a plurality of drive shafts that each has a first end individually connected to the power drive unit. The power drive unit includes a geartrain including a plurality of individual gears that are offset relative to each other along the gearbox, and a motor-driven rotation of one of the plurality of individual gears drives rotation of the other individual gears, and each of the plurality of individual gears rotates to drive rotation of a respective one of the plurality of drive shafts. A plurality of torque brakes is mounted to the gearbox, the torque brakes being mechanically coupled to respective individual gears and drive shafts. When the torque being passed through is above a predetermined threshold value, a locking of one of the torque brakes stops rotation of all gears simultaneously to maintain positional symmetry in the actuation system.

An actuation system includes a power drive unit that drives a plurality of drive shafts that each has a first end individually connected to the power drive unit. The power drive unit includes a geartrain including a plurality of individual gears that are offset relative to each other along the gearbox, and a motor-driven rotation of one of the plurality of individual gears drives rotation of the other individual gears, and each of the plurality of individual gears rotates to drive rotation of a respective one of the plurality of drive shafts. A plurality of torque brakes is mounted to the gearbox, the torque brakes being mechanically coupled to respective individual gears and drive shafts. When the torque being passed through is above a predetermined threshold value, a locking of one of the torque brakes stops rotation of all gears simultaneously to maintain positional symmetry in the actuation system.

A scissor lift includes a base, a platform, a lift assembly, and a linear actuator coupled to the lift assembly. The lift assembly includes a first support member pivotally coupled to a second support member and a third support member pivotally coupled to a fourth support member. The linear actuator includes a housing, a screw coupled to the housing, an extending member slidably coupled to the housing, and an electric motor coupled to the housing and configured to drive the screw to move the extending member relative to the housing. The housing includes a first mount coupled to the first support member and configured to rotate relative to the first support member about a first lateral axis. The extending member includes a second mount coupled to the third support member and configured to rotate relative to the third support member about a second lateral axis.

A scissor lift includes a base, a platform, a lift assembly, and a linear actuator coupled to the lift assembly. The lift assembly includes a first support member pivotally coupled to a second support member and a third support member pivotally coupled to a fourth support member. The linear actuator includes a housing, a screw coupled to the housing, an extending member slidably coupled to the housing, and an electric motor coupled to the housing and configured to drive the screw to move the extending member relative to the housing. The housing includes a first mount coupled to the first support member and configured to rotate relative to the first support member about a first lateral axis. The extending member includes a second mount coupled to the third support member and configured to rotate relative to the third support member about a second lateral axis.

An electric linear actuator for a lift assembly of a scissor lift includes a housing having a first end defining an aperture and a second end opposite the first end, an extending member received within the aperture and slidably coupled to the housing, a screw coupled to the housing, and an electric motor coupled to the housing and configured to drive rotation of the screw to control movement of the extending member along an axis of extension. The housing includes a mount configured to pivotally couple the housing to the lift assembly of the scissor lift. The mount is offset from the second end of the housing along the axis of extension such that the mount is positioned between the first end and the second end of the housing.

An electric linear actuator for a lift assembly of a scissor lift includes a housing having a first end defining an aperture and a second end opposite the first end, an extending member received within the aperture and slidably coupled to the housing, a screw coupled to the housing, and an electric motor coupled to the housing and configured to drive rotation of the screw to control movement of the extending member along an axis of extension. The housing includes a mount configured to pivotally couple the housing to the lift assembly of the scissor lift. The mount is offset from the second end of the housing along the axis of extension such that the mount is positioned between the first end and the second end of the housing.

An actuator primarily activated by transversal acceleration arising from rotational acceleration of a rotatable object is presented. The object is rotatable in a plane of rotation (P) about an object pivot point in the plane of rotation (P). The actuator comprises at least two bodies adapted to be rotatably, in or parallel to the plane of rotation (P), coupled to the object at a body pivot point of each body. The body pivot point and/or the body is arranged such that a mass distribution of the body is nonuniform about the body pivot point. Due to said nonuniform mass distribution about the body pivot point, the actuator is configured to transition to an activated state, in response to rotational acceleration of the object, by said at least two bodies rotating about their respective body pivot points in a direction opposite to a direction of said rotational acceleration of the object.