The present invention discloses a super large tonnage detachable hook. The hook comprises: a hook rod, a hook shaft, a hook body, a spherical roller bearing, and a thrust spherical roller bearing. The hook also contains a connection component which connects the hook rod to the hook body. The split-type self-locking sleeve is integrally connected to the hook rod by means of the hook hoop holder. This connection form adopts the meshing of the sleeve and the toothed sleeve of the hook rod to transmit the load, and the bearing capacity is greatly improved compared with the traditional screw connection. The split-type self-locking sleeve can hold the toothed sleeve on the hook rod from both sides respectively. This new type of hook adopts a special structure force transmission system, so that the hook can withstand the downward and upward bi-directional load, which solves the problem that the traditional hook is prone to damage once it hits the ground. The main load-bearing components of the hook assembly are forged of high-strength alloy steel 30CrNiMo8 as a whole. The hook achieves a good overall load-enduring performance and longer fatigue life. The lifting hook provided by the present invention has a single hook with an extremely large lifting weight of 5,000 tons and above; and creatively adopts a new structure form, a force transmission system, a material, and a manufacturing form. The hook has many advantages, such as: light weight, large bearing capacity, reasonable force transmission path, good waterproof performance, long service life and other advantages. It can greatly improve the working capacity and efficiency of floating cranes.

The present invention discloses a super large tonnage detachable hook. The hook comprises: a hook rod, a hook shaft, a hook body, a spherical roller bearing, and a thrust spherical roller bearing. The hook also contains a connection component which connects the hook rod to the hook body. The split-type self-locking sleeve is integrally connected to the hook rod by means of the hook hoop holder. This connection form adopts the meshing of the sleeve and the toothed sleeve of the hook rod to transmit the load, and the bearing capacity is greatly improved compared with the traditional screw connection. The split-type self-locking sleeve can hold the toothed sleeve on the hook rod from both sides respectively. This new type of hook adopts a special structure force transmission system, so that the hook can withstand the downward and upward bi-directional load, which solves the problem that the traditional hook is prone to damage once it hits the ground. The main load-bearing components of the hook assembly are forged of high-strength alloy steel 30CrNiMo8 as a whole. The hook achieves a good overall load-enduring performance and longer fatigue life. The lifting hook provided by the present invention has a single hook with an extremely large lifting weight of 5,000 tons and above; and creatively adopts a new structure form, a force transmission system, a material, and a manufacturing form. The hook has many advantages, such as: light weight, large bearing capacity, reasonable force transmission path, good waterproof performance, long service life and other advantages. It can greatly improve the working capacity and efficiency of floating cranes.

The present invention relates to a return system (10) intended to equip a hooking device comprising a housing and a load hook (30) mounted so as to be able to pivot relative to the housing, the return system being mounted between a rod (21) secured to said housing, and comprising at least one tension spring (11), a device for adjusting the force of each tension spring with a plate (12) and a connecting rod (13) adjustably attached to the plate, and a crank pin (14) situated at a free end of the connecting rod, each tension spring links the rod to said plate, the crank pin is attached to the load hook, and the return system exerts a return force on the load hook that allows said load hook to close. The present invention also relates to a hooking device equipped with such a return system.

The present invention relates to a return system (10) intended to equip a hooking device comprising a housing and a load hook (30) mounted so as to be able to pivot relative to the housing, the return system being mounted between a rod (21) secured to said housing, and comprising at least one tension spring (11), a device for adjusting the force of each tension spring with a plate (12) and a connecting rod (13) adjustably attached to the plate, and a crank pin (14) situated at a free end of the connecting rod, each tension spring links the rod to said plate, the crank pin is attached to the load hook, and the return system exerts a return force on the load hook that allows said load hook to close. The present invention also relates to a hooking device equipped with such a return system.

A double-locking hooking system comprising a structure, a hook that is able to move in relation to the structure between a closed position and an open position, and an immobilization system for immobilizing the hook in the closed position (18). The immobilization system comprises two immobilization devices each provided with at least one movable stop. The stops are in contact with the hook when the hook is in the closed position in order to immobilize the hook in the closed position. The two immobilization devices therefore each allow the hook to be immobilized in the closed position, by means of the stops, independently of each other. In order to position the hook in the open position, the two immobilization devices need to be activated in order for the stops to be moved to release the hook.

A double-locking hooking system comprising a structure, a hook that is able to move in relation to the structure between a closed position and an open position, and an immobilization system for immobilizing the hook in the closed position (18). The immobilization system comprises two immobilization devices each provided with at least one movable stop. The stops are in contact with the hook when the hook is in the closed position in order to immobilize the hook in the closed position. The two immobilization devices therefore each allow the hook to be immobilized in the closed position, by means of the stops, independently of each other. In order to position the hook in the open position, the two immobilization devices need to be activated in order for the stops to be moved to release the hook.

A safety load hook with a lower part defining a curved hook mouth with a hook opening of a predefined nominal width. An upper part is attached to the lower part and is pivotable into an open position for insertion or removal of a load, and into a closed position blocking insertion of a load or removal of a load. A marking is on each of the end regions of the upper part and lower part which face one another in the closed state. When closed, and when a size of the hook opening corresponds to the nominal width, the lower part marking is offset from the upper part marking. The offset distance is chosen such that when there is a predefined maximum widening of the hook mouth in relation to the predefined nominal width thereof, both markings are located directly side by side in the closed state.

A safety load hook with a lower part defining a curved hook mouth with a hook opening of a predefined nominal width. An upper part is attached to the lower part and is pivotable into an open position for insertion or removal of a load, and into a closed position blocking insertion of a load or removal of a load. A marking is on each of the end regions of the upper part and lower part which face one another in the closed state. When closed, and when a size of the hook opening corresponds to the nominal width, the lower part marking is offset from the upper part marking. The offset distance is chosen such that when there is a predefined maximum widening of the hook mouth in relation to the predefined nominal width thereof, both markings are located directly side by side in the closed state.

A safety load hook with a lower part having a hook throat to which a pivotable upper part is fastened, which, in an open position, allows a load to be suspended on the hook throat and, in a closed position, blocks the hook throat. The upper part is blockable in the closed position in by a locking arrangement which includes a locking lever that is pivotable into a release position and a locked position, is pre-tensionable into the locked position by a tensioning spring, is fastened to the lower part with the tensioning spring via the support bolt and, in the locked position, engages in a shaped receiving means on the upper part by way of a shaped projection. The locking lever includes a lever on its side opposite the shaped projection, with a center of mass on the lateral surface of the receiving bore for the support bolt.

A safety load hook with a lower part having a hook throat to which a pivotable upper part is fastened, which, in an open position, allows a load to be suspended on the hook throat and, in a closed position, blocks the hook throat. The upper part is blockable in the closed position in by a locking arrangement which includes a locking lever that is pivotable into a release position and a locked position, is pre-tensionable into the locked position by a tensioning spring, is fastened to the lower part with the tensioning spring via the support bolt and, in the locked position, engages in a shaped receiving means on the upper part by way of a shaped projection. The locking lever includes a lever on its side opposite the shaped projection, with a center of mass on the lateral surface of the receiving bore for the support bolt.