DD224012A1 - WIPPING FOR BOOM CRANES, PARTICULARLY WITH TELESCOPIC PULLERS - Google Patents

Abstract

The aim of the invention is to expand the usable working range of a jib crane and to ensure its operational capability in space-constrained workplaces. The task is to provide for a jib crane with telescopic boom a Wippzylinderanordnung, with both a steep rocking angle and a load capacity is achieved in the horizontal operating position of the telescopic boom. According to the invention, the bearing points of the luffing cylinder on the telescopic boom and / or on the crane head are arranged so as to be longitudinally displaceable in guides. For displacement hydraulic cylinders or tension elements are arranged. The invention is best illustrated in Figure 3 of the drawings. Fig. 3

Description

Luffing jib crane, especially with telescopic boom

Field of application of the invention

The invention relates to luffing mechanisms for jib cranes, in particular with telescopic boom, the discharge is adjustable by hydraulic cylinder.

Characteristic of the known technical solutions Bs are known boom cranes, in which the boom is designed as a horizontally lying bending boom and hydraulic rockers are arranged for rocking the boom ·

The arrangement of the rocker cylinder takes place with different union mounting angles and Sinbaulagen.

There are facilities known, the rocker cylinders are arranged to achieve the largest possible rocking angle almost parallel to the horizontally lying boom.

Hachteil this solution is that the use of such a jib crane in the horizontal operating position of the telescopic boom no load with an operating load allows, but only with gewippter boom position allows certain loads. Under bridges, overhead lines and in tunnels such a jib crane is only conditionally applicable.

In the arrangement of the cylinder at a larger angle to the horizontal cantilever is the load of the jib crane in this working position

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possible, but as JSTachteil a smaller rocker area is reached. (DD-WP 136 606) ^; .

Sine further solution is' known, in which are arranged as a rocker cylinder telescopic hydraulic cylinder »This design has the disadvantage that special ZylinderausfUhrungen are necessary and determines the carrying capacity of .Auslegerkranes by Teleskopabstufung

becomes

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According to DS-OS 25 28 802, a further arrangement of the luffing cylinder is known · In this solution, the boom support and the luffing cylinder is mounted on an additional hydraulically adjustable support.

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This solution has the disadvantage that a load of the jib crane with horizontal boom position is not possible and thus use under Pahrleitungen, bridges and tunnels is not relevant.

. ' , , · - '"- ^ ¹ ''-.' Object of the invention

The invention has the goal to expand the usable working area for a jib crane with luffing cylinder and to ensure its operational capability under spatially restricted working conditions.

DISCLOSURE OF THE INVENTION The invention has for its object to provide a Wippzylinderanordnung for boom cranes, with both a load capacity at horizontal operating position of the telescopic boom and a very stailer · Wippwinkel is achieved. .

According to the invention, the object is achieved in that the bearing points of the known in between the

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Telescopic boom and the crane top of a jib crane arranged rocking cylinder on the telescopic boom or on the crane top or both are formed longitudinally displaceable together, the bearing points of the rocker cylinders are hinged longitudinally displaceable in the telescopic boom and / or on the crane-5.

To move the bearing points in the Funrungen Kraftbetätigungsgeräte are provided between the crane head and / or the telescopic boom and the bearing point on the telescopic boom or between the crane top and the bearing point of the rocker cylinder on the crane top.

According to the invention the object is also achieved in that for the displacement of the bearing points of the luffing cylinder in the guides on the telescopic boom a tension element is provided as a coupling between the crane top and bearing point when there is an acute angle between the telescopic boom and the luffing cylinders

 When extending the luffing cylinder is carried by the tension element, the displacement of the articulation points of the luffing cylinder in the direction of crane top.

In the arrangement of power actuation devices, the displacement of the bearing points takes place on the boom or crane superstructure in the direction of crane superstructure or opposite without operating the extension movement of the Wippzylinder.

embodiment

The invention will be explained below with reference to exemplary embodiments.

'· · · ^F. · - 4 -In the accompanying drawings

1: Side view of the jib crane with horizontal operating position of the telescopic jib Pig * 2: Side view of the jib crane in the operating position with tilted telescopic jib and pulling element.

Pig. 3: Side view of the jib crane in the operating position with tilted telescopic boom and additional hydraulic working cylinder Pig. 4: Side view of the jib crane in the operating position with a tilted telescopic boom and additional hydraulic working cylinder at the bearing point of the Wippzylin-ders on the upper part of the crane

In the Pig · 1, a boom crane 3 is shown, the telescopic boom 1 is articulated on the upper crane part 2 in the pivot point 4. The rocker cylinders 5 are attached to the crane upper part 2 in the bearing point 7.

'' ·. '..' .. '''''. , · '- The bearing point 6 of the rocking cylinder 5 is arranged longitudinally displaceable on the telescopic boom 1 and is held in a Pührung 8 on the telescopic boom 1.

Between the bearing point 6 of the rocker cylinder 5 and the crane upper part 2 of the jib crane ^ 3, a tension element is provided as a coupling (Pig. 1). When the Te, lingual boom 1 is rocked, the bearing point 6 of the luffing cylinder 5 is forcibly moved in the direction of the crane upper part 2 in the guide 8 by the tension element 9. The luffing cylinders 5 thereby describe the pivoting radius 10 of the tensioning element 9 and move the telescopic jib on the given pivoting radius 14 (FIG. 2).

In _Fig. 3 are arranged for longitudinal displacement of the bearing point 6 in the direction of crane upper part 2 between the crane upper part 2 or the telescopic boom 1 hydraulic cylinder 11 as a tensile or compressive element. , .

In Fig. 4 shows the arrangement of the cylinder 5 with the invention lSngsverschieblichen Lagerpünkt 7, which is mounted in a guide 13 on the upper crane part 2. Between the crane upper part 2 and the bearing point T working cylinder 12 are arranged for displacement.

The inventive solution ensures the load capacity of the jib crane 3 in the operating position of the horizontal telescopic boom 1 with an operating load and thus its replaceability in spatially limited workplaces, e.g. reached under bridges, catenaries and in tunnels. This advantage is associated with achieving a steep rocking angle.

Claims (4)

- 6 pension claims 1. luffing jib crane, especially with! Telescopic boom, the luffing cylinder are arranged in a fixed Winkelst position between a crane top or an adjustable support and a horizontal telescopic boom, the luffing cylinders are arranged in pivotable and non-displaceable lagefpunkten, characterized in that. the bearing points (6j 7) of the hydraulic luffing cylinder (5) in guides (8; 13) are longitudinally displaceable. '·. ''; ''; ' 2. luffing jib crane according to item 1, characterized in that hydraulic working cylinder (11) between the bearing point (6) of the luffing cylinder (5) and the crane upper part (2) and / or the telescopic boom (1) for ν longitudinal displacement of the bearing point (6 ) lie in the hole (8). 3. luffing jib crane according to item 1 and 2, characterized in that the hydraulic cylinder (11 j 12) between the bearing point (6) and / or the bearing point (7) and the crane top (2) are arranged «'ι · 4 · Wippwerk.für jib cranes according to item 1, characterized in that tension elements (9) between the längsver- ^/ .. sliding bearing point (6) on the telescopic boom (1) and the. Crane top (2) at a non-displaceable bearing point (7), in the most effective lalle as bisecting the acute angle between the telescopic boom (1) and luffing cylinder (5) _} are arranged. Luffing crane for jib crane according to items 1 and 4 _} characterized in that the tension elements (9) are preferably in the bisector of the angle formed by the horizontal telescopic boom (1) and luffing cylinder (5). For this 3 sheets of drawings