Abstract: The present disclosure discloses a differential steering control method for a vehicle, which is applied to a motor system including a three-phase bridge type voltage inverter and relates to the technical field of motor modulation. The differential steering control method includes: acquiring feedback speeds of motors; setting target speeds of the vehicle; comparing the feedback speeds with the target speeds, and obtaining given current values of the motors through a proportion integration differentiation (PID) controller; acquiring feedback current values of the motors; comparing the given current values with the feedback current values, and obtaining given voltage values of the motors through the PID controller; calculating a modulation ratio M of voltage vectors of the motors, and indicating, when M is greater than M0.

Abstract: The present disclosure relates to the technical field of scissors lifting equipment, in particular to scissors lifting equipment with a hydraulic buffer for maintenance and a control method thereof. The scissors lifting equipment includes a hydraulic buffer and a scissors mechanism. The hydraulic buffer includes a hydraulic cylinder and a piston rod. The hydraulic cylinder has a lower connection end, and the piston rod has an upper connection end. The hydraulic buffer can support the scissors mechanism after being connected to the scissors mechanism via the upper connection end and the lower connection end. With characteristics of strong buffer capacity and load capacity, the hydraulic buffer, when supporting the scissors mechanism, not only is safe and stable, but also resists impact with buffer performance, thereby avoiding damage to the hydraulic buffer and the scissors mechanism.

Abstract: The present disclosure relates to the technical field of aerial work platforms, in particular to a linear actuator with a contact type safety nut, and an aerial work platform. The linear actuator includes a central screw, a driving nut mechanism, and a safety nut mechanism. The central screw has a screw raceway. The safety nut mechanism includes a safety nut seat sleeved at the periphery of the central screw. Limit hole channels pointing to the central screw are arranged on the safety nut seat. An elastic buffer element is arranged in each of the limit hole channels. A safety ball is arranged between the elastic buffer element and the central screw. The contact type safety nut enables the linear actuator to always keep safety, stability, and no loss of accuracy in a conversion process that the safety nut mechanism gets involved to take effect while the driving nut mechanism fails.

Abstract: The present disclosure relates to the technical field of aerial work platforms, in particular to a linear actuator with a contact type safety nut and a fault detection method thereof. The linear actuator includes a central screw, a driving nut mechanism, a safety nut mechanism, and a driving control assembly. The central screw has a screw raceway. The safety nut mechanism includes a safety nut seat sleeved at the periphery of the central screw. Limit hole channels pointing to the central screw are arranged on the safety nut seat. An elastic buffer element is arranged in each of the limit hole channels. A safety ball is arranged between the elastic buffer element and the central screw. The driving control assembly includes a motor for driving the central screw to rotate and a motor controller for controlling the motor to operate.

Abstract: 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.

Abstract: The present disclosure relates to the field of aerial work, and in particular, to a walking type aerial work platform, including a walking base, wherein the walking base is provided with a turntable; a mast type lifting device is fixed on the turntable; the mast type lifting device is hinged with one end of a retractable large supporting arm; the other end of the large supporting arm is connected with a work platform through a connecting structure; an up-and-down amplitude changing mechanism is arranged between the large supporting arm and the mast type lifting device; and a leveling mechanism is arranged among the mast type lifting device, the large supporting arm, and the connecting structure. The walking type aerial work platform can transport a work platform to an operation point even if there is an obstacle, and can always maintain the work platform in a horizontal state.

Abstract: Building material installation equipment includes: a sucking device for sucking panels, a rotating device for driving the sucking device to rotate, a cross translation device, a swinging device and a mechanical arm; a slip ring is arranged in the rotating device and electrically connected with the sucking device; the cross translation device comprises longitudinal translation plate and transverse translation plate which are capable of driving the sucking device to make a translational movement; the longitudinal translation plate and the transverse translation plate are arranged in a direction parallel to gravity, and are fitted; and the swinging device can drive the cross translation device to swing to one side of the mechanical arm.

Abstract: 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.

Abstract: The present disclosure relates to the technical field of high-altitude building material installation equipment, in particular to building material installation equipment with high flexibility. The equipment comprises: a sucking device for sucking panels, a rotating device for driving the sucking device to rotate, a cross translation device, a swinging device and a mechanical arm; a slip ring is arranged in the rotating device and electrically connected with the sucking device; the cross translation device comprises longitudinal translation plate and transverse translation plate which are capable of driving the sucking device to make a translational movement; the longitudinal translation plate and the transverse translation plate are arranged in a direction parallel to gravity, and are fitted; and the swinging device can drive the cross translation device to swing to one side of the mechanical arm.

Abstract: 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.

Abstract: 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.

Abstract: The present disclosure relates to the technical field of suction equipment, in particular to an integrated vacuum suction pad comprising an adsorption part and a vacuum device; the vacuum device is fixedly arranged on one side of the adsorption part, and comprises a vacuum pump, a control valve and a relay; the vacuum pump is used for pumping out air between the adsorption part and an object to be adsorbed, and the control valve is used for controlling the adsorption part to be communicated with atmosphere or the vacuum pump; and the relay is used for powering on the vacuum pump and the control valve. According to the present disclosure, the pads are integrated with the devices, such as the vacuum pump, and each pad is capable of doing adsorption and release actions independently.

Abstract: The present disclosure provides an electric lifting type cargo work platform. It includes a frame, a column, a stand and a shelf. The column is provided on the frame, and includes an electric push rod and a multi-stage sleeve. The multi-stage sleeve includes an outer sleeve, an inner sleeve, and a middle sleeve. The middle sleeve is provided with rollers, and each of the roller is provided with a chain. One end of the chain extends downward and is connected to the outer sleeve, the other end is connected to the frame. The output end of the electric push rod is connected to the middle sleeve. The stand and the shelf are provided on the column and can move in a height direction by means of the column.

Abstract: The present disclosure provides an electric lifting type aerial work platform. A column is fixed on a platform support and can move with the platform support; a workbench is connected with the column, the workbench can be lifted, and carries operators; a drive mechanism drives the column to lift. The column includes at least three sleeves sleeved in sequence, and the workbench is connected with the outer sleeve. The driving mechanism includes a first motor, a reducer, a brake and a first push rod; the first motor drives the outer sleeve to move via the push rod. Each of the sleeve is provided with a roller provided with a chain, and both ends of the chain are connected to two sleeves that are respectively located outside and inside of the sleeve where the roller corresponding to the chain is provided.

Abstract: The present disclosure relates to the technical field of anti-extrusion systems, in particular to an anti-extrusion device and an aerial work platform. It includes an operation platform guard for a guard rail mounted on an aerial work platform, the operation platform guard is movably connected to at least one detecting rod for the human body to lean on, and the detecting rod is provided with a position change sensing means for triggering an alarm system.

Abstract: Provided are a control valve, a derricking cylinder and a working method thereof, and an aerial work platform, relating to the field of aerial work. The control valve of the derricking cylinder includes a first balance valve provided on the oil circuit between the first port G and the second port F, and a second balance valve provided on the oil circuit between the third port H and the fourth port E; and a switch valve in series with the first balance valve is further provided on the oil circuit between the first port G and the second port F.

Abstract: The present invention relates to the field of engineering mechanics and more particularly, relates to an engineering work vehicle, and most particularly, relates to a vehicle with a rotary control box and aerial working platform. The vehicle with a rotary control box includes: a vehicle frame, a driving system disposed on the vehicle frame, and a control box; the control box is disposed at a lateral side of the vehicle frame in a rotary manner; and the control box is electrically connected with the driving system. embodiments of current invention makes it possible to manipulate with ease the aerial work platform to perform corresponding motions by an operator standing on the ground and, this kind of manipulation is quick and accurate. In addition, more convenience and human-friendliness is brought. At the same time, life time of relevant components of the aerial work platform is extended, and maintenance and repair cost is further reduced.

Abstract: The present invention relates to the field of engineering mechanics and more particularly, relates to an engineering work vehicle, and most particularly, relates to a vehicle with a low gravity center and aerial work platform. The vehicle includes a vehicle frame, a power system, a fuel tank, and a hydraulic tank all of which are mounted at a side of the frame. Correspondingly, the embodiment of the invention also provides an aerial work platform which provides better off-road performance and grade-ability, can work in complicated environment, and owns a longer horizontal reach and larger working range. Moreover, maintenance and repair cost is decreased, lifetime is extended, integrity is higher and appearance looks better.