The utility model content
Technical problem to be solved in the utility model provides a kind of stability that improves hoisting crane, alleviates the car hosit counterweight lift system of the deadweight of travelling of hoisting crane.
In order to solve the problems of the technologies described above, the hoisting crane counter weight device that the utility model provides, comprise rotating platform of crane, counterweight oil cylinder mounting seat is installed below described rotating platform of crane back segment, on described counterweight oil cylinder mounting seat, the counterweight elevating ram is installed, establish on the moving counterweight and the cooresponding lifting of described counterweight elevating ram hole, on described counterweight oil cylinder mounting seat, be provided with base hinge ear, establish on the described moving counterweight and the cooresponding counterweight hinge of described base hinge ear ear.
Described counterweight elevating ram adopts asymmetric layout, and the center of gravity after the intersection point of promptly described counterweight elevating ram connection lead and rotating platform of crane line of centers and described moving counterweight are in place is on same vertical curve.
Counterweight oil cylinder mounting seat is the body structure of modular design.
Adopt the car hosit counterweight lift system of technique scheme, counterweight lift piston bar is stretched out, link to each other with lifting hole on the moving counterweight then, withdrawal piston rod to counterweight reaches under the oil cylinder mounting seat, again the counterweight on moving counterweight hinge ear is linked to each other with base hinge ear on the oil cylinder mounting seat, can fix moving counterweight.
The utility model counter weight device mainly contains following effect: the counterweight lift system adopts asymmetric oil cylinder design, can install this mechanism additional under the situation that does not change former turntable structure, and this mechanism and other elements is not also interfered.The oil cylinder mounting seat is a body structure, has bigger bearing capacity, can satisfy the requirement of little tonnage hoisting crane to counterweight widely.
In sum, the utility model is a kind of stability that improves hoisting crane, alleviates the car hosit counterweight lift system of the deadweight of travelling of hoisting crane.Whole device low cost of manufacture, the manipulation process time is short, and loading and unloading are quick, and are safe and reliable.Can be used for fixing the hoisting crane that counterweight changes moving counterweight into convenient and simplely.
The specific embodiment
Referring to Fig. 1 and Fig. 2, counterweight oil cylinder mounting seat 2 is installed below rotating platform of crane 7 back segments, counterweight oil cylinder mounting seat 2 is body structures of modular design, on counterweight oil cylinder mounting seat 2, counterweight elevating ram 1 is installed, counterweight elevating ram 1 adopts asymmetric layout, be that center of gravity after the intersection point of counterweight elevating ram 1 connection lead and rotating platform of crane 7 line of centerss and moving counterweight 3 are in place is on same vertical curve, be that center of gravity after counterweight elevating ram 1 is in place with moving counterweight 3 is that symmetric points are installed on the counterweight oil cylinder mounting seat 2, establish on the moving counterweight 3 and counterweight elevating ram 1 cooresponding lifting hole 5, on counterweight oil cylinder mounting seat 2, be provided with base hinge ear 6, establish on the moving counterweight 3 and base hinge ear 6 cooresponding counterweight hinge ears 4.
Referring to Fig. 1 and Fig. 2, counterweight oil cylinder mounting seat 2 is welded on the bottom of the back segment of rotating platform of crane 7, counterweight elevating ram 1 asymmetric layout can be avoided the parts of lifting mechanism.It is hinged with the lifting hole 5 of moving counterweight 2 that counterweight elevating ram 1 piston rod stretches out the back, regain the piston rod of counterweight elevating ram 1, when counterweight oil cylinder mounting seat 2 lower planes are run on plane on the moving counterweight 3, that the counterweight hinge ear 4 of moving counterweight 3 is hinged with the base hinge ear 6 on the counterweight oil cylinder mounting seat 2.The dismounting inverse operation of moving counterweight 3.