Limitable rotation device for hoisting boom of bridge crane

Abstract

The invention discloses a limitable rotation device for a boom of a bridge crane, which comprises a main motor and a motor rotation adjustment mechanism. The main motor is fixedly installed on the left side of the operation platform, and the There is a support frame, the left and right ends of the support frame are equipped with electromagnetic clutches, the inner wall of the support frame is connected to the motor rotation adjustment mechanism, and the right end of the motor rotation adjustment mechanism passes through the inner wall of the support frame and is arranged on the The reducer on the right side of the motor rotation adjustment mechanism is connected, and the driving end of the reducer is connected with the auxiliary motor. Dual motors with different speeds are used to drive the rotation adjustment, which greatly improves the rotation adjustment accuracy, and the worm gear rotation support has Self-locking function, the device can be self-locked at any position during the overall rotation process, without adding other auxiliary devices, which reduces the probability of device failure, is safe and reliable, and effectively improves work efficiency.

Description

technical field [0001] The invention relates to the technical field of bridge cranes, in particular to a limitable slewing device for a boom of a bridge crane. Background technique [0002] With the development of the economy and the advancement of science and technology, high-rise buildings can be seen everywhere in the city. Cranes are one of the most critical machinery in the process of building buildings. The current cranes are not very reasonable in the design of the rotation angle when suspending objects in the sky. There are also certain flaws: [0003] (1) The technology used in the existing slewing device is almost shaft-to-shaft rotation transmission, and the force is very bad, resulting in a short service life of the rotating shaft inside the slewing device, and it is troublesome to replace; [0004] (2) At present, many crane spreaders on the market often use a single motor drive combined with a gear reducer for rotation adjustment. This rotation adjustment meth...

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Problems solved by technology

[0003] (1) The technology used in the existing slewing device is almost shaft-to-shaft rotation transmission, and the force is very bad, resulting in a short service life of the rotating shaft inside the slewing device, and it is troublesome to replace;

[0004] (2) At present, many crane spreaders on the market often use a single motor drive combined with a gear reducer for rotation adjustment. This rotation adjustment method has low precision. When the material needs to be accurately positioned, it often requires manual repeated jogging operations It depends on the operator's proficiency in the operation of the equipment. The operation process is cumbersome, the error is large, and the vibration will be affected during the jogging process. When the rotary precision is high, repeated jogging or Repeated adjustments can not meet the requirements

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