SU1557084A1 - Telescopic - Google Patents

Abstract

The invention relates to mechanical engineering and can be used in hoisting machines. The purpose of the invention is to improve the operational capabilities by improving the accuracy of positioning. A telescopic boom consists of a rotational drive 1, a housing 2, a root 3, and sliding 4 and 5 sections, as well as an extension drive mechanism containing a root screw 6, a slide screw 7 that are installed in bearing supports 8. Nuts 9 and 10 are rigidly fixed in the bases of the sliding sections and are connected with screws 6 and 7. 2 ill.

Description

3 (L

and

four

The invention relates to mechanical engineering and can be used in hoisting machines.

The purpose of the invention is to improve the operational capabilities by increasing the accuracy of positioning.

FIG. 1 shows a telescopic boom of a lifting mechanism, side view; fig 2 is the same, top view.

A telescopic boom consists of a drive 1 of rotation} of the housing 2, a root 3 and a retractable 4, 5 sections of a telescopic boom, as well as an extension drive mechanism containing a root screw 6, a screw 7 of the extendable section, which are installed in bearing supports 8. Nuts 9, 10 are rigidly fixed in the bases of the extendable sections and connected with screws 6, 7 of the preceding sections 3, 4. All sections 3, 4, 5 are equipped with stops at the ends 11. Rotating when extending section 4, 5 are held by keys 12,

The boom works as follows. In the initial state, the extendable sections 4, 5 are in the extreme upper position. When the screw 6 of the root section is informed of the movement from the rotational drive 1, the section 4 begins to move out, moving nut 9 along the thread of the screw 6 of the root section. Simultaneously with the wing 6, it starts the rotational movement and the BINT 7 of the sliding section through the movable slotted or keyed joint 13. The nut 10 of the sliding section 5 moves progressively along the thread of the screw 7 of the sliding section 4. The stops limit the extension of the section 4.5 and prevent the nuts 9, 10 of the sliding sections with threads of screws 6, 7. The retraction of the sliding sections of the telescopic boom of the lifting mechanism proceeds similarly in the reverse order,

Claims (1)

Invention Formula A telescopic boom containing root and pull-out sections, a driving screw and nuts installed at the base of the sliding sections, characterized in that, in order to improve operational capabilities by improving positioning accuracy, the screw is made telescopic, each link of which is fixed with the possibility of rotation in each , except for the end section of the telescopic boom, and each nut is fixed rigidly at the base of the corresponding section with the ability to interact with the link of the telescopic screw inward section. Faye. 2