SU146931A1 - Jib crane mounted mainly on tractor - Google Patents

Description

Jib cranes are known that are mounted mainly on a tractor and consist of an arrow with a cable-blocking system, a turntable and a winches mounted on a frame located above the tractor cab. A disadvantage of the known jib cranes mounted mainly on the tractor is their relatively small carrying capacity.

A distinctive feature of the boom crane is that its supporting and turning platform, together with all the equipment placed on it, is mounted on a space frame, which surrounds the tractor and is rigidly fixed on its running frame. Outriggers are installed on the bottom frame of the space frame, through which the load is transferred directly to the ground. Thanks to this. I load capacity of the proposed crane is higher than that of the famous.

FIG. 1 shows the proposed jib crane mounted mainly on the tractor, and FIG. 2 shows the same side view.

The described jib crane is mounted on the tractor / and includes a rigid frame 2, which is rigidly attached to the channel frame of the tractor chassis 1 using special brackets 3.

On top of the frame 2 there is attached a ring 4 of the katani, on which the pivoting frame 5 is mounted on eight rollers, the boom 6 of the crane is hinged on it, and the outboard platform 7 on which is located opposite to the pivoting frame 5, where four electric winches 8 are located.

One winch is used to raise and lower the boom through the hoist, and the second to turn the crane. Two other winches are freight.

No. j46931--2 During lifting, the crane is mounted on outriggers 9. Support shoes are laid under outrigger screws 9, and outrigger 9 are unscrewed to full stop. The tractor 1 thereafter no longer carries the crane load, but becomes the load ballast of the crane, which increases its stability and load capacity.

The maximum carrying capacity of the proposed crane is 15 g with a lifting height of 15 m and an outreach of 4 m.

Subject invention

A jib crane mounted predominantly on a tractor, including an arrow with a cable-block system mounted on a turntable, characterized in that c. In order to increase the load capacity by transferring loads directly to the ground through outriggers, its turntable platform, along with all the equipment placed on it, is installed on a spatial frame rigidly fixed and enclosing the tractor, and outriggers are installed on the lower frame.