SU958301A1 - Rotatable cantilever crane - Google Patents

Description

one

This invention relates to a lift machinery industry and is intended for use in cantilever cranes.

Known cantilever rotary crane containing a column, a boom rotating in a horizontal plane, installed-. Lenna in bearings on an axis mounted inside the column and equipped with a spherical underp1: ohm, and adjusting the mechanical mechanisms attached to the column, including adjustment mechanisms resistant to the column, including stop screws and nuts l.

The disadvantage of well-known design. 15 of the crane is a large metal intensity, which is increased by the lower tail portion of the boom, which lies below the spherical support. It has a maximum torque of 20 loads and therefore has a cross-sectional area, and a cross-sectional area of the BepxwMl part located above the HRHtiiero bearing bearing.

In addition, glasses of adjustment screws must be placed between the shank of the boom and the walls of the column, which causes a significant increase in the diameter of the column.

The limits of regulation are limited between the inner ends of the glasses and the surface of the tail section of the axis. When installing a crane on a poorly prepared platform, this adjustment limit is not enough to install the boom strictly horizontally ..

The purpose of the invention is to simplify the design and reduce its metal intensity.

Claims (1)

The goal is achieved by the fact that the stop screws of the adjustment mechanisms are connected to the support by means of a sphere. hinges, and the column is provided with a bracket made with vertical apertures, wherein the stop screws are housed in said apertures with a gap. Ha FIG. 1 depicts a cantilever crane,: general view; in fig. 2 Via A “and FIG. I; in fig. 3 - raarez on. 2; in fig. 4 is a view of B in FIG. 3. In the upper part of column 1, a vertical axis 2 of boom 3 is mounted, which is mounted on the axis by means of radial bearings 4 and thrust bearings 5. To the end of the axis of the boom with: a spigot support 6 is attached, allowing it to be mounted on column 1. Crane It has three adjustment mechanisms through which the boom is adjusted. Each mechanism includes a vertically positioned stop screw 7, at the upper end of which a spherical head 8 is installed, mounted in a spherical socket, made in a horizontally positioned bracket 9 attached to the base C. The spherical head is closed from above by a hook 10 attached to the bracket 9. Spherical The head, the bracket and the cover form a spherical hinge between the screw and the bolster. Screw 7 passes through the vertical distance II, which is made in a horizontal position attached to the column the bracket 12 and tightened to it with the help of the upper nuts 13 and the lower nuts 14. The lower end 15 of the screw enters the hole 16, made in the horizontally positioned bracket 12. During the adjustment, the nuts 13 are relaxed on the side of the crane to be tilted the boom and the nuts 14 on the opposite side, with the axis 2 turning on the bushing 6 to the desired position. After this, the nuts of 14 are tightened on the side of the crane to which the boom is to be tilted, and the opposite side of the nuts 13c. In this way it fixes: the desired position of the boom. Due to the presence of a horizontally positioned bracket 17, the nuts 14 are prevented from falling out during the production of the alignment, which creates a lack of operation. The proposed crane with the same capacity, boom reach, height of the column and the distance between the boom bearing supports has a lower metal content, a well-known crane there. The decrease in metal consumption is achieved. due to the absence of the lower tail part of the axis located under the spherical bolster, due to the absence of horizontal glasses located inside the column between the tail part of the axis and the wall of the column, so that the column can be made minimum in its outer diameter and internal diameter provided that that its cross-sectional area must satisfy the conditions of strength and stability. The design of the crane ensures safety and convenience when adjusting the position of the axis. In the proposed crane, the adjustment limits during adjustment are dramatically increased, since there are no horizontally positioned glasses with these adjusting screws and a shank axis that limit these limits. i.,. Invention Formula. and A cantilever-swiveling crane containing a column, a boom rotated in a horizontal plane, mounted in bearings on an axis mounted inside the column and equipped with a spherical one. a tamper, and adjustment mechanisms attached to the column, including stop screws and nuts, characterized in that, in order to simplify the design and reduce its metal content, the stop screws of the adjustment mechanisms are connected to the tack nd by means of spherical hinges, and the column is equipped with a bracket, made with vertical holes, 1C) and this, the stop screws are placed in the said holes with a gap. Sources of information taken into account in the examination 1. Copyright svdedelstvo USSR № ZO8967, cl. B 66 C 23 / OO, 197O (prototype). & .-i . (rig. I Pho.