An industrial vehicle includes a holding portion for holding a load, a raising/lowering portion for raising/lowering the holding portion, a control valve for controlling the amount of hydraulic oil supplied to or discharged from the raising/lowering portion, and a control device for supplying an energizing current to the control valve. The control device includes a speed calculation unit for calculating first and second speed command values for an ascending/descending speed, a current calculation unit for calculating first and second current command values for the energizing current, and a current supply portion for supplying first and second energizing currents to the control valve, thereby offsetting a first vibration generated in the load upon start of supplying the first energizing current, by a second vibration generated in the load upon start of supplying the second energizing current.

A mobile manipulator robot having a pneumatic charging system. The mobile robot includes an energy source and a charging system to charge the energy source. The charging system includes a coupler having a mating end configured to mate with an external pneumatic supply system to access a pneumatic supply and a pneumatic actuator disposed downstream of the coupler. The pneumatic actuator is configured to convert energy from the pneumatic supply to charge the energy source. The pneumatic actuator may be an air motor or a piezo.

The present disclosure relates to the technical field of lift trucks, and in particular, to an energy control method and system of a lift truck. The method includes the following steps: step 1, putting the lift truck in a working state, and downwards closing a work platform at a high place, wherein hydraulic oil in an upper lifting oil cylinder and hydraulic oil in a lower lifting oil cylinder start to flow back into a oil tank; step 2, driving a hydraulic element to rotate anticlockwise in the back flowing process of the hydraulic oil, wherein the anticlockwise rotation of the hydraulic element drives a motor to rotate anticlockwise to generate a reverse electromotive force, and the reverse electromotive force is rectified to output a direct current for energy recycling.

Disclosed is a payload transportation device for transporting a payload, which has a low height and in which driving wheels are configured to come into constant contact with a ground surface even when the ground surface is uneven. The payload transportation device includes a loading plate above which a payload is loaded, a lift-driving portion configured to generate a driving force to vertically lift the loading plate, a first assembly configured to support a bottom of one side of the loading plate and in which some components included in the lift-driving portion are provided, a second assembly configured to support a bottom of the other side of the loading plate and in which other components included in the lift-driving portion are provided, hinge portions configured to connect the first assembly to the second assembly in a hinge structure, at least a pair of driving wheels coupled to both sides of a bottom of any one of the first assembly and the second assembly, and a driving unit configured to rotate the driving wheels.

The present disclosure discloses a hydraulic control system. The hydraulic control system may include a hydraulic module, a PLC control module, a hydraulic valve group control module, a manipulation module, and an action module. The manipulation module is connected with the PLC control module and is configured to input an operation instruction to the PLC control module; the PLC control module is respectively connected to the hydraulic module and the hydraulic valve group control module, and is configured to output a control signal corresponding to the operation instruction to the hydraulic valve group control module, and control the activation of the hydraulic module to provide hydraulic pressure to the hydraulic valve group control module; and the action module is connected with the hydraulic valve group control module, and is configured to perform an action corresponding to the control signal.

A pantograph assembly may include a mast carriage assembly comprising a trunnion cross-member and a trunnion shaft coupled to the trunnion cross-member, and a pantograph mechanism coupled to the trunnion shaft.

A material handling vehicle may include a clamp assembly, the clamp assembly including a housing, a grip assembly, and a power source. The grip assembly may be pivotally engaged with the housing. The power source may be in electrical communication with the grip assembly. The grip assembly includes a lobe pivotally engaged with the housing and a contact supported by the lobe, the contact being electrically conductive.

A drive system for an industrial handling vehicle comprises an electric motor, a first pump, for example, a plunger pump, and a second pump, for example, a gear pump. The first pump is configured to provide hydraulic power for a travelling device of the industrial handling vehicle. The first pump and the travelling device are in a first hydraulic circuit. The second pump is configured to provide hydraulic power for a brake device and/or a steering device and/or a handling device of the industrial handling vehicle. The second pump, the brake device, the steering device, and the handling device are in a second hydraulic circuit isolated from the first hydraulic circuit. The electric motor is operatively coupled to both the first pump and the second pump, to drive them to operate.

An industrial vehicle includes a holding portion for holding a load, a raising/lowering portion for raising/lowering the holding portion, a control valve for controlling the amount of hydraulic oil supplied to or discharged from the raising/lowering portion, and a control device for supplying an energizing current to the control valve. The control device includes a speed calculation unit for calculating first and second speed command values for an ascending/descending speed, a current calculation unit for calculating first and second current command values for the energizing current, and a current supply portion for supplying first and second energizing currents to the control valve, thereby offsetting a first vibration generated in the load upon start of supplying the first energizing current, by a second vibration generated in the load upon start of supplying the second energizing current.

A system for parasitic power generation and control of a load-handler configured to be coupled to a lift truck, with a parasitic energy convertor mounted on the load-handler and coupled via a hydraulic feed line to a hydraulic pump on the lift truck. The parasitic energy convertor configured to generate electrical power for components of the load-handler, including a load-side control transceiver. The load-side control transceiver is configured for controlling control valves based on commands received wirelessly from a truck-side control transceiver. The load-side control transceiver configured for monitoring and control of the load-handler including event logging and notification of maintenance needed.