A lift device includes a base, a retractable lift mechanism having a first end coupled to the base, a platform coupled to and supported by a second end of the retractable lift mechanism, and a steering system. The base includes a first wheel and a second wheel laterally spaced from the first wheel, and a third wheel and a fourth wheel laterally spaced from the third wheel. The third wheel and the fourth wheel are both pivotally fixed. The steering system includes a first electric actuator coupled to the first wheel and configured to independently control a steering direction of the first wheel, and a second electric actuator coupled to the second wheel and configured to independently control a steering direction of the second wheel.

A lift device includes a base having two front wheels and two rear wheels, a retractable lift mechanism having a first end coupled to the base, a platform coupled to and supported by a second end of the retractable lift mechanism, and a steering system. The steering system includes a second linear actuator coupled to a first front wheel of the two front wheels and a third linear actuator coupled to a second front wheel of the two front wheels. The two front wheels are spaced from the two rear wheels in a longitudinal direction. The retractable lift mechanism includes a first linear actuator extending along the longitudinal direction and configured to transition the retractable lift mechanism between a stowed position and a deployed position. The second linear actuator and the third linear actuator extend generally along the longitudinal direction.

A lift device includes a scissor assembly coupling a base to a platform. The scissor assembly includes a first scissor layer including a first inner arm configured to rotate relative to a first outer arm about a middle axis. The first scissor layer has an end axis center point defined based on the positions of the end axes about which the first inner arm and the first outer arm rotate. The first middle axis is offset from the first end axis center point. The scissor assembly further includes a second scissor layer coupled to the first scissor layer and extending between the first scissor layer and the platform. The second scissor layer includes a second inner arm pivotally coupled to a second outer arm.

A scissor lift includes a base, a platform configured to support a load, a lift assembly having a first end coupled to the base and a second end coupled to the platform, and a linear actuator coupled to the lift assembly and configured to extend to raise the platform relative to the base. The lift assembly includes a series of support members that are pivotally coupled to one another. The linear actuator includes a screw, a nut engaging the screw, and an electric motor configured to drive rotation of the screw relative to the nut to control extension of the linear actuator.

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.

The present disclosure relates to the technical field of mechanical equipment for aerial works, in particular to a small scissor aerial work platform and a traveling chassis thereof. The traveling chassis includes a base and oppositely-arranged left and right steering wheel assemblies. The base is of a concave structure, a scissor-stored groove with an upward opening is formed in the base, a left wheel set accommodating groove and a right wheel set accommodating groove which are used for accommodating the steering wheel assemblies and provided with downward openings are further formed in a front end of the base, and a lower portion of the scissor-stored groove is located between the left wheel set accommodating groove and the right wheel set accommodating groove.

The present disclosure relates to the technical field of aerial work machines, in particular to a scissor aerial work platform and a scissor lifting assembly thereof. The scissor lifting assembly includes a scissor frame, a lifting mechanism and a weighing mechanism. A rotary connecting rod transversely penetrates through the scissor frame, and can rotate around its central axis; the lifting mechanism includes a drive base and a push rod extending out of the drive base; a lower end of the drive base is rotationally connected with the scissor frame, and a rotary sleeve is fixed to an extending-out top end of the push rod and fixed to a periphery of the rotary connecting rod in a sleeving manner; and the weighing mechanism is arranged on the rotary sleeve and the rotary connecting rod, and can measure a bearing capacity of the rotary connecting rod.

A platform assembly includes a work platform including a platform floor and a safety rail extending from the platform floor to a rail height, and a primary sensor unit secured to the work platform and positioned adjacent one of the platform floor and the safety rail. The primary sensor unit is configured to monitor an area from the platform floor or from the safety rail to a space above the rail height and forward and aft of the work platform. The platform assembly enhances protection for an operator from sustained involuntary operation resulting in an impact with an obstruction or structure.

A folding lifting device for automobile, comprising outer housing, lifting supporting plate, folding assembly and synchronous cushioning assembly. Outer housing comprises housing bottom, lifting supporting plate is provided in outer housing, and folding assembly is provided between lower side of lifting supporting plate and upper side of housing bottom; folding assembly is composed of two groups of same side V-shaped folding elements, and synchronous cushioning assembly is provided between lower sides of two groups of side V-shaped folding elements. Each of two groups of side V-shaped folding elements comprises front upper folding bar, front lower folding bar, rear upper folding bar and rear lower folding bar; first synchronous rack is fixedly provided at rear side of front lower folding bar, second synchronous rack is fixedly provided at the front side of the rear lower folding bar.