There is disclosed a portable work station comprising a generally vertical frame mounted to a base having wheels mounted thereon which allow the vertical frame, and a lifting platform mounted on the vertical frame, to be maneuvered across a flat floor surface. Preferably, the wheels are freely rotatable in any direction to allow the base to be easily manoeuvered on a flat floor surface. The wheels may be powered with motors and controlled via an operator control to move the base and the lifting platform into any desired height and orientation with a high degree of manoeuverability.

Devices and methods to relieve lift chains from being maintained under constant, or nearly constant, tension are provided.

An assist control device controls an electric motor assisting traveling of a mobile object. The assist control device includes an operating switch and a control part. The operating switch is configured to be turned on when operated by a user. The operating switch is configured to be turned off when released from being operated by the user. The control part controls the electric motor to output an assist force when the operating switch is turned on.

A wet brake includes a housing, non-rotatable brake discs, rotatable brake discs, a parking lever, a piston, a plate, and a connector. The non-rotatable and the rotatable brake discs are disposed in engagement with the housing and an outer peripheral surface of a rotary shaft, respectively. The piston, the plate, and the rotary shaft are accommodated in the housing. The piston is configured to be pushed by the parking lever toward the non-rotatable and the rotatable brake discs. The plate is in contact with one of the non-rotatable brake discs or one of the rotatable brake discs. The connector is disposed at a position between the piston and the plate. The housing has a recess that is formed in an outer peripheral surface of the housing at a position corresponding to the position of the connector. An outer diameter of the connector is smaller than that of the piston.

Devices and methods to relieve lift chains from being maintained under constant, or nearly constant, tension are provided.

A materials handling vehicle includes a power unit; a load handling assembly coupled to the power unit; at least one obstacle detector mounted to the power unit; and a controller. The at least one obstacle detector detects object located along a path of travel of the power unit, and generate a distance signal upon detecting an object corresponding to a distance between the detected object and the power unit. The controller receives the distance signal and generates a corresponding vehicle stop or predetermined maximum allowable speed signal based on the distance signal, wherein if a sensed object is located within a speed zone associated with a predetermined maximum allowable travel speed comprising a fixed speed greater than zero (0) miles per hour, as determined by the distance signal, the vehicle speed is reduced to the predetermined maximum allowable vehicle speed.

A forklift according to an exemplary embodiment of the present invention is capable of measuring weight of a cargo that is to be transported by the forklift. The forklift according to the exemplary embodiment of the present invention measures weight of a cargo by a displacement according to compression by tensile force applied to the chain 50 in a portion, in which the chain 50 is installed in a top frame 14.

This invention relates to a truck mounted forklift (TMFL), more specifically an electrically powered TMFL. The TMFL comprises a U-shaped chassis having a pair of side bars bridged by a rear cross bar, a pair of front wheels, and a rear wheel. The TMFL further comprises a lifting assembly, a driver's station, and a battery pack mounted on the chassis. Each of the front wheels is provided with a dedicated electric wheel motor assembly. The electric wheel motor assemblies each comprise an interior permanent magnet (IPM) motor having a drive shaft, and a planetary gear box coupled to the IPM motor. The planetary gear box is mounted axially in-line with and is driven by the drive shaft. The IPM motor is mounted substantially internal the side bar and the planetary gear box is mounted substantially internal the bounds of the wheel rim. In this way, a very compact configuration of drive assembly for the front wheels is provided.

An axle housing supporting structure includes an axle housing, a brake housing, an axle bracket for supporting the axle housing and the brake housing, a connecting member inserted in the axle housing and the axle bracket to connect the axle housing and the axle bracket for preventing the axle housing from falling from the axle bracket, and at least one co-fastening bolt fastening the axle bracket, the brake housing, and the axle housing together.

Technologies are described for restraining systems. The systems may comprise a base, a stationary arm, a swing arm, a rod, first straps, and second straps. A bottom end of the stationary arm may be attached to a first end of the base. A bottom end of the swing arm may be attached at a second end of the base. The rod may be attached to top ends of the stationary arm and the swing arm. First straps may be attached to the stationary arm and configured to loop around and support an object. Second straps may be attached to the swing arm and configured to loop around and support the object. The rod may move and push the top of the swing arm away from the top of the stationary arm. A friction force between the first and second straps and the object may be effective to restrain the object.