The invention relates to the field of special mechanical equipment, in particular to a lifting hook with a gravity lever type anti-unhooking device. The lifting hook comprises a hook body (1) and a hook handle (2), wherein an anti-unhooking device is mounted on a joint of the hook body (1) and the hook handle (2). According to the lifting hook, by adopting the gravity lever principle, two iron plates (one short plate and one long plate) are fixed by bolts and also can be welded together; the short plate (namely an anti-dropping plate) is closed with the lifting hook by virtue of self-gravity of the long rod; and the anti-dropping plate and the lifting hook are always closed under a normal condition, so that only is gravity difference between the long rod and the anti-dropping plate required to overcome in the counter-clockwise direction in an open state. Force of opening the anti-dropping plate is far lower than twisting force, overcome by an existing lifting hook with an anti-unhooking device, of a spring, so that the force of opening the anti-dropping plate does not need to artificially overcome. The lifting hook is reasonable in design and simple in structure, so that the lifting hook with the anti-unhooking device is relatively practical and safe, and has good market application prospect.
Lifting hook with gravity lever type anti-unhooking device
2015-09-09
Patent
Elektronische Ressource
Englisch
IPC: | B66C Krane , CRANES |
Anti-unhooking device and anti-unhooking method for lifting hook
Europäisches Patentamt | 2023
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