The electric chain hoist and drive trolleys
It is mainly used for lifting non-guided loads, using a hook or with other systems or lifting accessories.
By simply fixing the Donati electric hoist chain to an electric or manual drive trolley, a load can be lifted on a girder. This type of assembly enables integrated lifting and horizontal movement of the load.
This type of equipment, depending on the trolleys used, can be mounted onto monorails, PROSYSTEM light handling systems, or be the entire lifting unit for other equipment with which it will be incorporated, such as overhead cranes, lifting brackets etc...
The Donati DMK series electric hoist, whether suspended or on the ground, can be used in different fixed configurations.
DMK electric hoist power and security
Due to its great flexibility, it can be run in 6 different configurations:
The electric hoist is suspended from a ring or on request from a hook.
Pushed trolley mode:
The electric hoist trolley is joined to a free-drive trolley. Horizontal movement is made by manually pushing the load. This type of use is ideal for moving light loads or for short journeys.
Electric trolley mode:
It is joined to an electrically driven trolley. This configuration is used for heavy loads or in places that are difficult for operators to access and where it is not possible to move the load by manual pushing. The trolley to which the electric hoist is attached, is directly operated from the hoist button box.
Mechanical chain trolley mode:
In this type of set-up, driving is done by a chain operated by the operator, which moves the trolley rollers to in turn move the trolley. This type of set-up is used for handling a relatively small number of objects, for short journeys or if positioning requires a large degree of precision.
HPR (reduced headroom) mode:
This is for reduced heights. This type of trolley enables the electric chain hoist to benefit from a maximum travel distance for the hook. Technically, it is equipped with a sprocket chain system mounted on the crossbar, connecting the two drive trolleys, one of which is electrically driven and the other of which is free.
This type of electric hoist is made for performing a reverse lift. Instead of hanging the hoist to its mounting, set up high, the lifting hook is hung at the point of suspension. This means that there is not the weight of the hoist to lift, but just the weight of the hook and chain. This type of set-up is particularly suitable for shows when it is necessary to mount and unmount the hoist frequently, often at very great heights.
The DMK electric hoist
It is designed with modular components, allowing for quick and economical implementation while meeting business and quality requirements. It is mass produced according to
The basic design: 4 standard sizes of DMK hoists, 1, 2, 3, 4, can cover load capacities ranging from 100 kg to 4000 kg, with a FEM (ISO): 1Bm (M3), 1Am (M4), 2m (M5).
1 lifting speed: obtained with a four-pole motor, with the standard speeds available for DMK electric chain hoists with 1 strand of cable of 4, 6.3, 8 and 16m/min, while for the 2-strand reeving system has speeds of 2.5, 3.2 and 4 m/min
2 lifting speeds: Obtained with bipolar motors, whose lifting speeds are 4 & 1.2 m/min and 8 & 2.5 m/min with respect to hoists with 1-strand chains, 2.5 & 0.8 m/min and 3.2 & 1 m/min for DMK electric hoists reeved with 2 strands.
The hook path: ranges from 3 to 16 m for the standard height. Other heights are available on request.
2 types of power supply: Donati electric chain hoists are designed as standard to be powered with an alternating current with a
- Three-phase voltage of 400 V - 50 Hz according to IEC 38-1.
- Single-phase voltage of 230 V +/- 5 % - 50 Hz for DMK hoists 1, 2, 3, at single speed and with a maximum load of 800 Kg
Other voltages and different frequencies are available upon request.