Heavy-Duty Double Girder Electric Wire Rope Hoist Trolley for Overhead Cranes

Structural composition

Lifting motor: Integrated into the upper housing, a conical rotor brake motor or variable frequency motor, with power-off self-locking.

Speed reduction mechanism:Hardened tooth surface helical gear reducer, high efficiency, low noise, and long service life.

Drum:Central drum, multiple layers of wire rope wound, neatly arranged.

Guide pulley:Black guide pulley/pulley, optimizes wire rope routing and reduces angular wear.

Wire rope:Special wire rope for lifting, equipped with hook and pulley block.

Braking system:Power-off self-locking brake to prevent hook slippage.

Trolley frame:A long, narrow frame that supports the entire lifting mechanism, with wheels at both ends.

Wheel assembly:runs along the track above the double main beams, arranged at both ends, with uniform wheel pressure distribution.

Safety devices:upper and lower bidirectional limit switches, overload protection, power failure brake, hook anti-detachment device, warning signs.

Working principle

The hoisting motor drives the drum to wind up and unwind the wire rope via a hardened gear reducer. The wire rope, through guide pulleys and the lower hook pulley block, drives the hook to rise and fall vertically. The trolley frame's wheels drive the entire machine to move laterally along the track above the double main beams. This, combined with the main trolley's longitudinal movement along the factory building's tracks, creates a three-dimensional hoisting space covering the entire span of the factory building. Operation is performed from the driver's cab, remote control, or ground control, depending on the machine's configuration.

Core advantages

With the support of two beams, the load capacity is greater: the load is shared by two main beams, the structure is rigid and can cover medium and large tonnage, far exceeding the capacity limit of single beam suspended hoists.

Integrated layout and compact structure:The motor, reducer, drum and pulley are concentrated on the trolley frame, resulting in a low center of gravity, stable operation and concentrated maintenance space.

Winch-type transmission, durable and reliable: hardened tooth surface reducer + drum wire rope, impact resistant, resistant to frequent use, and has a longer life cycle than simple hoist solutions.

Guide pulley rope protection:The black guide pulley optimizes the direction of the wire rope, reduces the deflection angle and wear, and extends the service life of the wire rope.

Smooth operation:The wheel set is arranged at both ends with uniform wheel pressure, ensuring smooth lateral movement without rail wear.

Safety features include:bidirectional upper and lower limit switches to prevent top impact, power failure braking to prevent hook slippage, overload protection, and hook anti-detachment protection.

Highly adaptable: It can be customized according to the main beam gauge, track type, and lifting height, and is compatible with QD universal double beam and European double beam. It is also suitable for replacing the lifting mechanism of old vehicles.

Application scenarios

Double-girder bridge crane assembly; replacement and upgrade of old overhead crane lifting mechanisms; workpiece hoisting in heavy machinery processing workshops; component transfer on large equipment assembly lines; loading and unloading of steel structure components and profiles; manufacturing of pressure vessels, boilers, and wind power components; auxiliary equipment workshops in metallurgy, power, and building materials industries; warehousing and logistics for heavy goods in and out of warehouses; equipment maintenance and large-scale unit installation and hoisting.