The material of the frame selected was mild steel. The material of the frame should be tough enough to withstand the normal shock load and high bending stresses produced during the loading and transporting. The jib is an inbuilt portion of the column. The frame includes the base of the crane and the vertical column which is connected to the base. The main components of jib crane are frame and jib. The various components of the jib crane are: jib and frame (mild steel), electric motor (250 W), worm gear set, winding drum, pulleys, wheels, rope, hook, and forward and reverse switch. Mobile jib cranes consisting of truck mounted and crawler mounted cranes. Portal / Semi-portal cranes of different varieties-Wharf cranesĤ. For handling light loads these cranes may have auxiliary arrangement.ĭepending on the use, jib cranes are classified into a number of varieties, primarily on the basis of their mountings. Frequently these cranes are provided with two main hoisting winches which can be employed singly or together to lift a load. Jib crane used in ship yards for lifting heavy machinery and equipment, weighing 100 to 300 tons, are usually mounted on pontoons. Lifting heights may be 30 meters or more. Jib Cranes provided with grabbing facilities have usually a capacity ranging from 3 to 20 tons operating 50 to 100 cycles per hour. Such cranes find various applications in port area, construction site, and other outdoor works.įor handling general cargo, lifting capacities are usually 1.5 ton to 5 ton with maximum outreach of 30 meter. Lifting capacity of such cranes may vary from 1/2 ton to 200 ton and outreach from a few meter to 50 meter. Various sub-classifications of these cranes are possible. The cranes as a whole may be either, fixed or moveable.
The outreach of the jib may be fixed or variable. Load is usually suspended from the outer end of this inclined mast. Jib crane consists of an inclined member supported by a rope or any other type of structural member attached to a vertical mast or frame.
Free jib crane cad model portable#
The designing and fabrication of this portable jib crane uses application of mechanics of solids ,manufacturing technology and various subjects of mechanical engineering. The two degrees of freedom in the horizontal plane are provided by the wheels provided, while the third, vertical degree of freedom is provided by a hoist.īecause of low cost and versatile use, there is a very good application for the jib cranes. Special types of Jib Cranes are also used in positioning the cameras in shootings. Portable Jib Cranes is electrically powered for lifting operation, according to the need. The purpose of these devices is simply to help workers move objects weighing from 50kg to 400kg from one point to another. Jib Cranes can be used for lifting of different type of material in the segments where frequent lifting & handling of material activity is required. Portable Jib Crane is a small lifting, and material handling equipment used in engineering workshops as well as in godowns & ware houses.
Free jib crane cad model pdf#
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