Open Type Crab Trolley
1.Electro Magnetic Brake System
By using fail safe brake system, when power on then brake off; power off then brake on at the same second.
Hoisting motor is winding exclusive for a hoisting purpose. Frames are according to IEC specifications and interchangeable. At least "F" insulation class in winding, as such, the motor is always in good insulation, good heat-resistance and proper water protection. It is reliable and safe for high frequency applications.
3.Frequency Changing Speed Control
Using the electrohydraulic brake to control the initial lowering speed of hoist. The hydraulic action is controlled by the motor secondary winding. When power off, it works as a secondary brake to increase the brake's safety.
All the gears are designed according to hoisting/crane forward + backward rating requirements, high strength and well anti- wearing. It is good for high frequency usage.
The up / down limit switch is available. It is screw type mechanical limit switch in harmony with drum's rotating cycle.
The driving of trolley is modularized for an easy maintenance. It contains brake, motor, reducing gear box and wheel set.
★ Eddy Current Speed Control
For a long lasting, a high speed and a large capacity lifting, we utilize the eddy current speed control for a better function of initial lowering speed control. Due to eddy current is without brake lining and no touching, it is long lasting and almost trouble free.
1.Crab Trolley Unit
It contains up/down hoisting and left/right traversing building together in the unit. Sometimes has main and secondary hoisting in the unit. Welding of crab frame is using structure steel. A layout of crab trolley is based on available space for an easier maintenance and a safety handrail is included.
Girder's design is based on major standard requirements. It takes safe working load, girder span, application surrounding and class of usage into considerations.
There are two types of cab. One is total enclosed type, the other is semi-enclosed type. Cab can be installed exhaust fan and/or air conditioner upon request.
4.Electric Feeder for Girder
Generally, we use the flat cable festoon system.