Hoists & Trolleys Supplier: Overhead Crane Trolley for Sale

Overall design of the crane trolley:

The overhead crane trolley is mainly composed of three major parts: the lifting mechanism, the trolley running mechanism and the trolley frame, in addition to a number of safety protection devices.

The lifting trolley travels laterally along the trolley track, while the hook does the lifting movement. Its working range is the rectangular space of the lot it can travel in, which is exactly in line with the general form of the workshop.

Lifting mechanism design:

• The lifting mechanism consists of an electric motor, transmission device, drum, brake, pulley set and hook device.
• Overhead crane pulley sets are generally double pulley sets, the corresponding drum is also left and right symmetrical double spiral groove of the volume Jane, or ordinary double drum.
• This kind of coupling has simple structure, large compensation, impact resistance, vibration and wear resistance, no noise, long life, easy to install and maintain, and is a new type of coupling to promote the use.
• On overhead cranes, a block brake is generally used, usually mounted on the high-speed shaft of the reducer.

Trolley running mechanism design:

• In a medium tonnage overhead travelling crane, the trolley has four travelling wheels.
• When laying out the individual components of the lifting mechanism, the total centre of gravity of the mechanism should be close to the longitudinal centreline of the trolley frame so that a more uniform wheel pressure can be achieved.
• The wheels and bearings form a unit assembly (wheels with angular bearing box), which is placed underneath the trolley frame so that it can be easily loaded and unloaded at height.
• By using a vertical gearbox, the motor and brake can be placed on top of the trolley frame, making it easier to carry out installation and maintenance work and reducing the flat size of the trolley frame, making it compact.

Trolley frame design:

• The trolley frame is generally made up of welded longitudinal beams and crossbeams of steel plates.
• The trolley frame has to bear the full lifting weight and the self-weight of each body, and should have sufficient strength and rigidity, while at the same time reducing the self-weight as far as possible to reduce wheel pressure and bridge load.
• The trolley frame of the crane is now a welded structure, made of steel plates or sections welded together.
• According to the distribution of forces on the trolley, the trolley frame consists of two longitudinal beams and their connected crossbeams in the direction of the track to form a rigid whole, the two ends of the longitudinal dye left with right-angle cantilever to install the wheel's angular bearing box.