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Small jib crane hook maintenance knowledge

Views:13     Author:Site Editor     Publish Time: 23-08-2018      Origin:Site

The small jib crane has a light working intensity. The crane consists of a column, a rotary arm rotary drive and an electric hoist. The lower end of the column is fixed on the concrete foundation by anchor bolts. The cycloidal pinion reduction device drives the cantilever rotation. The electric hoist runs in straight line on the cantilever beam and lifts the weight. Crane swing arm is hollow steel structure, light weight, large span, heavy lifting, economical and durable. The built-in walking mechanism adopts special engineering plastic walking wheel with rolling bearing, which has small friction and light walking. The structure size is small, which is especially beneficial to improve the hook stroke.
The hook is an important part of the mobile jib crane, and also a component of extremely easy loss. Therefore, it should be checked and maintained frequently during operation to ensure the normal and safe use of the electric jib crane.
Maintenance methods for the hooks of small jib cranes:
1. The surface of the hook should be clean and free from cracks, sharp angles, burrs, peeling and other defects;
2. There shall be no cracks, white spots or inclusions affecting the safe use of the hooks;
3. The defects on the crane accessory hook are not allowed to be welded;
4. The wear of the dangerous section shall not reach 10% of the original size;
5. The opening degree should meet the requirements of 5.2 of GB10051;
6. The torsion deformation of the crane accessory hook, that is, the torsion angle of the hook body shall not exceed 10°;
7. The hook handle of the dangerous section or the hook shall not be plastic deformation;
8. The thread of the hook should not be corroded.
With the rapid development of China's power, petrochemical, steel, transportation and other infrastructure construction, the market of free standing jib crane expands rapidly, and the general quantitative development trend of jib crane has become an unchangeable fact. In order to reduce production cost, save manpower and material resources, the general quantification demand of jib crane is gradually expanding, and the lifting requirement of small jib crane is also higher and higher. At the same time, the requirement of energy consumption control and crane performance is higher and higher. As an important part of automatic production process, the basic requirements of crane are simple operation, high safety, reliable performance and easy maintenance. In addition, the cost - effective lifting machinery will be more market in the future.


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