Analysis of Basic Structure of Overhead Crane

Analysis of Basic Structure of Overhead Crane

General structure of general Overhead crane:

1. The Overhead Crane is formed by two box-shaped main girder, two box-shaped end beams and two girder beams. The main girder and the end girder are rigidly connected, and the middle of the two end girders are bolted and detachable. Is to bear the weight of the car and the external load. Must have sufficient strength, static stiffness and dynamic stiffness to ensure that under the action of the specified load, the main beam in the elastic under the allowable range of flexion will not be deformed, the main beam on the arch is used to offset the work of the main beam The resulting elastic deformation to reduce the car's climbing, down, and to ensure that the cart drive operating performance. The end beam is the main force of the Overhead crane components, multi-purpose steel plate welded into a box-shaped structure, under the beam in the side of the wheel equipped with a cart, bear the crane in the vertical direction of the load.

2.The drive mechanism is composed of two sets of symmetrical and independent drive devices. The main components of the drive are motor, brake, reducer, wheel and so on. All the institutions adopt the rolling bearing mechanism, and all the parts are between the parts. Using the gear coupling connection, the main passive wheel shaft are supported in the angular bearing box to facilitate the assembly and disassembly.

3.The small frame is made of steel plate, which is equipped with lifting mechanism and running mechanism.

4. Hoisting mechanism: Overhead crane in the upper part of the small frame installed with a lifting mechanism, a single hook when a set of independent drive device; there are main, pay two hooks, there are two sets of independent drive The device acts as a hoisting mechanism. In order to ensure the safety and reliability of the work, reducer high speed shaft equipped with a brake device, the drum at one end of the bearing seat with lifting height limit position.

5. Car operating mechanism: car operating mechanism is driven by the motor vertical reducer, reducer low speed shaft to drive the way to drive the active wheel, the other end of the motor shaft with a brake.

6. Safety devices: In order to ensure the safety of the lifting equipment, to prevent accidents in the lifting operation, the lifting mechanism has a safety protection device. Common protection devices are: limit switch, buffer, anti-collision device, from the weight limiter.