Traction running mechanism for climbing girder crane

Abstract

The invention discloses a traction running mechanism for a climbing girder crane, which comprises the field of cranes. Traction hoisting machines comprise two low-speed hoisting machines which are fixed on an upper chassis of the crane in a bilateral symmetry manner ; two hoisting cable-pulley groups are symmetrically connected between the two traction hoisting machines of the upper chassis and corresponding front anchoring mechanisms; the pulling force of the traction hoisting machines is used for providing traction power and overcoming the downwards-sliding power caused by deadweight to pull the whole mechanism to move ahead; the design of the hoisting cable-pulley groups guarantees the stable movement direction of hoisting cables and provides sufficient safety factor assurance; a block brake is arranged at the output shaft end of a motor of the traction running mechanism; meanwhile, a disc brake is arranged on a winding drum wallboard; when the traction hoisting machine rotates, the tensile force of the hoisting cables can prevent the crane from sliding from a ramp; and when the traction hoisting machine is braked, the block brake and the disc brake can be started to realize double safety brake, so that the downwards-sliding of the crane caused by the counter revolution of the hoisting machine is effectively prevented, and the safety requirement is guaranteed.

Description

technical field [0001] The invention relates to a traction running mechanism for a climbing girder crane, belonging to the field of cranes, in particular to a climbing girder crane. Background technique [0002] With the rapid development of bridge engineering construction, the appearance design of bridges has also changed from the original simplification to diversification. Arched bridges are becoming more and more popular due to their advantages in structure and aesthetic appearance, such as Chongqing Chaotianmen Bridge, Nanjing Dashengguan The Yangtze River Bridge and the Guangzhou Dongping Waterway Bridge on the Wuhan-Guangzhou Passenger Dedicated Line are all arch structures. [0003] The traction running mechanism is an important part of the girder erecting crane to complete the bridge erection. When the track is horizontal, the traveling mechanism of the crane generally uses a motor to drive the wheels to roll on the track by itself or uses an oil cylinder to push th...

AI Technical Summary

Problems solved by technology

When the motor-driven self-rolling method is used to drive the crane to walk on the ramp, the wheels will slip and cannot walk due to the small adhesion coefficient of the rail, and even the car will slide due to the sliding force greater than the frictional force.

The hydraulic cylinder jacking method is used because the rigid transmission of the hydraulic cylinder cannot well overcome the change of the slope of the rail with the steel beam joint, and it is easy to cause damage to the hydraulic cylinder and lead to rail climbing or deviation, resulting in potential safety hazards

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