The invention discloses a large tonnage hook capable of preventing rotary jamming. The hook comprises a hook body, a hook crossbeam and a hook nut, the upper end of the hook body is provided with a rod portion connecting segment, the hook crossbeam is sleeved on the rod portion connecting segment of the hook body, the tail end of the rod portion connecting segment has an external thread, the hook nut is connected to the tail end of the rod portion connecting segment of the hook body, a thrust bearing is arranged between the hook nut and the hook crossbeam, the bottom of the bore of the hook crossbeam is provided with an annular slot, a rolling bearing is arranged in the annular slot, the bore of the rolling bearing cooperates with the external diameter of the rod portion connecting segment, and the lower portion of the rolling bearing is sealed and fixed through a through cover. The hook adopting the above structure can bear load and realizes an aligning effect, and thoroughly solves the rotary clamping phenomenon of previous large tonnage hooks by rotating the hook body due to the rotation of the rolling element of the rolling bearing and by changing previously designed sliding friction to rolling friction; and an arranged oil seal can prevent leakage of a lubricant.
Large tonnage hook capable of preventing rotary jamming
2015-07-15
Patent
Electronic Resource
English
IPC: | B66C Krane , CRANES |
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