CH662334A5 - CRANE LIFT FOR CONSTRUCTION CRANES. - Google Patents

Description

The invention is based on the object, a crane lifting 50 has a transverse bore 10, through which a much smaller diameter horizontal bolt 11 is improved in its work of the type mentioned at the beginning, that even when using a relatively long one Lifting device guides and is supported on both sides in a recess on a corresponding drum with a relatively large diameter and relatively smaller cheeks 12 or the like, which are supported on the scaffolding of the top of the tower 3 and are not reinforced by the crane construction. The bolt 11 is axially fixed non-displaceable distance between the hoist drum and 55 loan.

Modify the closest rope pulley on the crane scaffold The one convex, spherical

relatively inexpensive rope deflection angles can be achieved. see outer surface having inner ring 13 of a joint bearing. According to the invention, this object is achieved by means of an arrangement. The axial fixation of the inner ring 13 such that the cable deflection closest to the hoist drum follows via two spacer bushes 14a, 14b, which at one end roll indirectly around a horizontal, transverse to the longitudinal center 60 against the end faces of the inner ring 13 and at the other end axis of a horizontal bolt hanging support part. support against inner side surfaces of the cheeks 12. The inner axis is pivotable. nenring 13 encompasses an outer ring 15 with a cylindrical,

As a result of the measure according to the invention, the outer diameter adapted to the diameter of the transverse bore 10 remains

Load rope, due to the automatic adjustment (inclined surface and concave, spherical inner surface. The outer position) of the rope deflection roller, in its line of action fully in the 65 ring 15 is in a known manner, e.g. by means of the corresponding groove groove of the rope groove. The deflection of the load rope to the corresponding circlips 16 (circlips), axially fixed, and a steered rope deflection roller is minimal. The outer ring 15 and the inner ring 13 form a so-called

A cost-effective design for the so-called spherical plain bearing, which involves turning the cable pulley 6

662 334

around the longitudinal central axis of the bolt 11 and a limited le 6, around a horizontal axis lying perpendicular to the longitudinal central axis of the pivoting of the supporting part 9, including the cable deflecting bolt 11, is made possible.

C.

1 sheet of drawings

Claims (3)

662 334 2nd PATENT CLAIMS 1. Crane hoist for construction cranes, with a hoist drum that enables large rope storage and rope deflection rollers between the hoist drum and a load suspension device, characterized in that the rope deflection roller (6) closest to the hoist drum (4) is indirectly around a horizontal, transverse to the longitudinal central axis of a horizontal bolt (11) a hanging support part (9) lying axis is pivotable. 2. Crane hoist according to claim 1, characterized in that the pivotability of the cable pulley (6) is achieved by a spherical bearing (13, 15). 3. Crane hoist according to claim 1, wherein the support part is fork-shaped at its end facing the cable deflection roller and has transverse bores for receiving the axis on which the deflection roller is roller-supported, characterized in that the support part (9) on its the cable deflection roller (6 ) opposite end has a horizontal transverse bore (10), the diameter of which is greater than the diameter of the bolt (11) which extends through the transverse bore (10) and is supported in corresponding recesses in cheeks (12), and in the annular space between the bolt (11) and the wall of the transverse bore (10) of the inner ring (13) and the outer ring (15) of a spherical plain bearing. len the pivotability is given when - according to a preferred embodiment of the invention - a commercially available spherical bearing is used. An advantageous further development of the crane hoist according to the invention, in which the support part is fork-shaped at its end facing the cable deflection roller and has transverse bores for receiving the axis on which the cable deflection roller is roller-bearing, consists in the support part being on its end facing away from the cable deflection roller. ic de has a horizontal transverse bore, the diameter of which is substantially larger than the diameter of the bolt penetrating the transverse bore and supported in corresponding recesses in a crane frame part, and that the inner ring and the outer ring of a spherical plain bearing are arranged in the annular space between the bolt and the wall of the 15 transverse bore are. - The use of the maintenance-free spherical plain bearing and the permanently lubricated roller bearings make maintenance of the cable pulley largely unnecessary. In addition, a relatively short distance between the bearing points of the bolt is possible, which has a favorable effect on the dimensioning of the bolt diameter. In the drawing, an embodiment of the invention is shown schematically. It shows: 25 Fig. 1 is a side view of the upper part of a tower crane, and Fig. 2, the cable pulley with its suspension, partly in section, on a larger scale. 30 A motor-driven lifting drum 4 is arranged on the counterweight boom 2. The hoist drum 4 is designed as a storage drum for the re-opening several times. The invention relates to a crane hoist for winding load rope 5; i.e. there is a hoist Construction cranes with a large rope storage drum 4 with a relatively large diameter, a relade hoist drum and rope deflection rollers between the 35 tiv large length and with a relatively small Seilrillenstei hoist drum and a load handling device. presentation. The load rope 5 is from the hoist drum 4 In the case of tower cranes or the like which are erected high, coming through a first (nearest) deflection roller 6, with relatively large load hook heights - e.g. 50 m and, in comparison to the hoist drum - level higher, it is swiveling to achieve a large rope storage when the scaffolding of the tower top 3 is swiveled, firstly a hoist rope drum with a relatively 40 hangs, a second, stationary deflection pulley 7 is nearby the large diameter and a relatively large length to the end of the boom 1 on the tower side, possibly further deflecting roller select, and secondly to wind up the load rope in multiple layers. - Len or rope pulleys over the load hook bottle to a fixed da, due to the crane construction, the distance of the point. Hoist drum from the closest, 4S roll, which is closest to the hoist drum 4 and is supported in corresponding recesses on the crane frame, is in a manner known per se via roller bearings 17, a more or less fixed, non-rotatable axle mounted on an axis on roller axles 8 stored. The axis 8 is shown in FIG. In the case of a relatively long lifting gear-speaking bores there is a fork deflection angle which is relatively large at this end 9a, which is supported in relation to the supporting part 9 or the like which is in the form of a rope. That the winding behavior is unfavorable. Rod-shaped end 9b of the supporting part 9 facing away from axis 8