SU1696374A1 - Self-propelled jib crane - Google Patents

Abstract

The invention relates to a lifting and transport engineering. The purpose of the invention is to improve the safety and convenience of servicing the crane mechanisms. In the lower part of each lower section 6, roller brackets 9 are fixed by means of brackets 7, for which the guides 9 are mounted on the crane's turntable. In the transport position, sections 6 are arranged vertically and serve as the bonnet wall. On the lower surface of section 6, a guide is mounted, in which a slider is mounted, fixed at the end of link 18, which is pivotally connected to support leg 19. 11 il.

Description

The invention relates to hoisting machinery, and in particular to self-propelled jib cranes, mainly of large lifting capacity, containing a rotary platform with crane mechanisms and devices placed on it.

The purpose of the invention is to increase the safety and ease of maintenance of crane mechanisms.

In Fig.1 shows a jib self-propelled crane, side view; in FIG. 2 is a section AA in FIG. 1 (hood in the transport and working positions of the crane); in FIG. 3 - working platform in the extended position; in FIG. 4 - node I in FIG. 3; in FIG. 5 is a section bB in FIG. 4; in FIG. 6 is a section BB of FIG. 2; in Fig.7 is a section GG in Fig. 6; on Fig section DD in Fig. 6; in FIG. 9 is a schematic geometric diagram of the conversion of the hood section to the working platform; in FIG. 10 - crane with extended platforms, rear view; figure 11 - hood two extended sections.

On the rotary platform 1 of the jib self-propelled caterpillar crane 2 under the hood 3 there are crane mechanisms 4. The hood 3 consists of L-shaped walls made in the form of upper 5 and lower 6 sections.

The lower sections 6 are made with the possibility of converting them into folding work platforms. To do this, in the lower part of each lower section 6 by means of brackets 7, the roller bearings 8 are fixed, and on the rotary platform 1, guides 9 are mounted perpendicular to the longitudinal axis of the crane, in which the roller bearings 8 are mounted, fixed by a bar 10 and bolts '11. In the transport position, the sections 6 are arranged vertically and serve as the wall of the hood 3. At the same time, the lower sections 6 are joined with the upper sections 5 by means of a lock-sealing device 12. At the same time, the bent edges of the section 6 having grooves 13 are fixed with fingers 14 on the struts 15 of the hood 3.

A guide 16 is mounted on the lower surface of the section 6, into which a slider 17 is mounted, fixed at the end of the link 18 pivotally connected to the support link 19 of the folding folding stop.

When the section 6 is in the vertical position, the links 18 and 19 of the articulated folding stop are folded, and the roller bearings 8 occupy a fixed position at point 0 (Fig. 9). The platform 6 has a fence made in the form of a folding folding racks

20 equipped with telescopically extendable railing 21.

The conversion of the hood elements to the working platforms is as follows,

When opening the hood, each section 6 is rotated on the roller supports 8 around point E and slide it along the guides 9. In this case, the roller support moves from point E according to the scheme to point E. Link 18 moves with the slider 17 in the guide 16 from point Zh and is fixed in the recess 22 of the guide 16 at point Zh and point 3 of the articulation of the links moves to point 3ι. There is a full opening of the articulated folding emphasis, providing reliable fixation of the platform 6 relative to the turntable. The upper section 5 of the hood 3 can serve as a visor for protection against atmospheric influences when working with mechanisms.

The safety of work on the site is also provided by a fence along the outer end. To do this, rotate the struts 20 around the axles 23 into a vertical position, push the upper part of the racks with the railing out of them and fix them in the working position. On the sides of the site, if there is no need to extend the adjacent work platform, quick-release fences are usually installed. As required, one, two or all sites can be put forward at once, depending on the front of the work (FIGS. 10 and 11).

To convert the platform to section 6 of the hood 3, it is necessary to raise it to remove the slider 17 from the recess 22 and push it all the way, after which the platform is easily moved from horizontal to vertical position, in which it is fixed with finger 14 on the rack 15 of the hood 3.

Claims (1)

Invention formula An arrow-mounted self-propelled crane containing a rotary platform on which mounted crane mechanisms covered by a hood, the longitudinal walls of which are mounted on a rotary platform with the ability to rotate around its LOWER;. <Their edges and fixation in vertical and horizontal positions by. locking devices, characterized in that, in order to increase the safety and ease of maintenance of the crane mechanisms, the rotary platform is provided with transverse guides, and the longitudinal walls are provided with rollers fixed on their lower parts and installed in the said guide axes, the rotation axes of which are aligned with the rotation axes of these walls, and mounted on the outer parts of the latter perpendicular to the mentioned axes, guides, and a locking device for fixing in the horizontal position of the longitudinal 5 walls including includes the sliders installed in the guides of the latter with the possibility of fixing in the extreme positions and the two ends of the joints pivotally connected with them by one ends of their first links 10, the second links of which are pivotally connected by their ends respectively to the second ends of the first links and the lower parts of the longitudinal walls and are installed with the possibility of interaction with the corresponding end surfaces of the turntable when fixing the longitudinal walls in a horizontal position. 5-5 16 77 // fig. 5 fig. 5 I Fig.