5results about How to "Start and stop smoothly" patented technology

This utility model discloses a reciprocating motion drive structure for a transport trolley, including a track and a frame. The frame is movably mounted above the track, and a rolling assembly with rollers at its bottom supports the frame and allows it to move on the track. A transmission assembly is mounted on the frame to drive the frame to reciprocate on the track. This transmission assembly includes a synchronous pulley driven by a motor, a transition pulley pivotally mounted on the frame, and a synchronous belt. The two ends of the synchronous belt are fixed to connecting plates at both ends of the track. The transition pulleys are distributed on both sides of the synchronous pulley, and the synchronous belt is wound around the transition pulleys and the synchronous pulley. When the motor drives the synchronous pulley to rotate, the synchronous belt, in conjunction with the transition pulleys, drives the frame to reciprocate on the track. By replacing direct drive with synchronous belt transmission, and relying on the meshing of the synchronous belt teeth and the fixing at both ends, the start-stop impact can be effectively buffered, and slippage errors can be eliminated, resulting in smooth start-stop and high positioning accuracy.

The invention discloses an electric control system and method for a belt elevator of a gantry crane, and belongs to the technical field of control over the belt elevator of the gantry crane. The electric control system of the belt elevator of the gantry crane comprises the belt elevator, an operation input unit, a PLC (Programmable Logic Controller) control unit, a safety monitoring unit, an execution indication unit and a variable frequency driving unit. The invention provides an electric control system and method for a belt elevator of a gantry crane, which are high in integration level, intelligent and reliable, can cooperate with the gantry crane to work, can realize full-automatic, continuous and efficient conveying of materials from the gantry crane to a storage yard, fundamentally replaces vehicle transfer, and improves the working efficiency. The system has complete safety protection and intelligent fault diagnosis functions, and aims to improve the operation efficiency, reduce the operation cost and realize green and environment-friendly wharf operation.

The utility model relates to the technical field of heavy turret lifting mechanisms, in particular to an air bag driven turret lifting structure which comprises an outer sliding sleeve, a supporting sliding sleeve, a guide shaft, an air bag driving assembly and a supporting base. The turret body achieves rotary motion through the supporting sliding sleeve and the outer sliding sleeve, the air bag driving assembly expands through air inflation and contracts through air exhaust, and therefore the outer sliding sleeve is driven to do lifting motion along the supporting sliding sleeve, and rotary motion and lifting motion of the turret body are achieved. The air bag serves as a flexible lifting execution element, compressed air serves as a power source, the air bag is inflated and deflated to achieve vertical lifting motion of the heavy turret, the turret is of a stable lifting, leveling, unbalance loading resisting, low-impact, clean and environment-friendly structure, the reliability of the turret is improved, and the service life of the turret is prolonged. The device is a heavy-load lifting equipment technology integrating mechanical engineering and a pneumatic technology.

The invention discloses a single-phase power electronic voltage regulator, and belongs to the technical field of electric energy regulation. Comprising a parallel compensation circuit, a high-frequency resonance DC-DC circuit and a series compensation circuit, the high-frequency resonance DC-DC circuit is respectively connected with the parallel compensation circuit and the series compensation circuit to form an AC-DC, DC-DC and DC-AC three-stage electric energy conversion structure, and partial power conversion and bidirectional energy flow are realized; the series compensation circuit forms a series compensation power module by a plurality of full-bridge converters, the parallel compensation circuit is a set of single-phase full-bridge inverter, and the high-frequency resonant DC-DC circuit adopts a CLLC resonant topological structure; through the bidirectional transmission channel design of the three-stage AC-DC and DC-AC electric energy conversion structure and the high-frequency resonance DC-DC, compensation energy can be injected into a line when the voltage of the power grid is sag, and excess energy on the load side can be fed back to the power grid when the voltage is sag, so that the functional limitation that part of the existing schemes can only perform unidirectional compensation is solved, and the power grid voltage sag compensation device is suitable for being applied to the power grid. And full-type voltage abnormal working conditions of the power distribution system are adapted.

The utility model provides a permanent magnet synchronous turbine gear motor for an elevator, belongs to the technical field of elevators, and solves the problem that the conventional similar motor is easy to vibrate during operation. The motor comprises a sports car shell and an outer cover fixed with the sports car shell, and an integrally formed gear motor shell is fixedly connected in the outer cover. The speed reduction motor shell is provided with a speed reduction cavity and a motor cavity which are perpendicular in axis and communicated with each other, the outer side face of the motor cavity abuts against the outer cover, and at least two fixing columns protrude out of the outer side of the speed reduction cavity and are fixed to the outer cover. A stator, a rotor and a motor shaft are arranged in the motor cavity, one end is connected with a motor end cover, and an encoder is arranged outside the end cover; a speed reduction shaft and a speed reduction gear are arranged in the speed reduction cavity, and the speed reduction gear is in meshing transmission with the motor shaft. The speed reducing motor is compact in structure and stable in connection, vibration of the speed reducing motor in the operation process can be effectively reduced, and the operation safety and reliability of the elevator are improved.