SU1539163A1 - Tower crane - Google Patents

Abstract

The invention relates to the field of lifting and transport machinery, namely, tower cranes. The purpose of the invention is to increase reliability. The crane cab 5 is made with an inner wall 8 and a hole 11 in the roof and a field 10. The cab 5 is mounted on the tower 1, on which the guides 13 are made for the chassis 12 of the cab 5. Windows 6 are installed in the side walls 7. When the crane is in operation, the cab 5 it is lifted by a cargo winch to a predetermined height, after which the cargo winch is disconnected by means of a coupling and the cabin is fixed by means of a mechanical brake. 1 hp f-ly, 4 ill.

Description

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FIELD OF THE INVENTION The invention relates to a lifting and transport machinery, namely, tower cranes.

The purpose of the invention is to increase reliability.

FIG. 1 schematically shows a tower crane; in fig. 2 shows section A-A in FIG. one; in fig. 3 - kinematic diagram of the cab hoist drive; in fig. 4 - crane tower with cab shock absorber.

The tower crane comprises a tower 1 mounted on a turntable 2 mounted on the chassis 3. In the upper part of the tower 1, an arrow 4 is fixed. installed internal wall 8, in which the door (not shown). In the ceiling 9 and the floor 10 of the cab 5, the holes 1 1 are bounded by the wall 8. The cab 5 is mounted on the tower 1 and is made with running gears 12 that interact with the guides 13 made on the tower 1. 13 are located at the vertices of the corresponding polygons.

Cab 5 is suspended on flexible bodies 14, one ends of which are fixed in the upper part of the tower 1, and the other through deflecting units 15 mounted in the upper part of the tower 1 on brackets (not shown) are connected with a lifting drive of the cab 5 including a drum 16 connected via a controlled clutch 17c with a gearbox 18 of a cargo winch. The cargo winch includes an engine 19 with a brake 20, a generator 21 for forming mechanical characteristics of a cargo winch when working with light weights, a drum 22. The cargo winch control unit 23 is electrically connected to the engine 19, a generator 21, a clutch 17, a brake 20 and a mechanical brake 24 of the cab lifting gear mechanically connected to the drum 16. The electrical equipment 25 of the cab 5 is connected to the block 23 by means of a flexible cable 26.

At the bottom of the tower 1, a shock absorber 27 is installed, including springs 28, support plates 29 and 30, one of which is fixed to the tower 1, and the second on the springs 31 is located above the springs 28.

The running gear 12 of the cab 5 includes crawlers, made for example in the form of rollers 32, which can be self-aligning. Tower 1 may be limited to a polygon or circle in plan.

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The opening in the cab 5 is made in response to the cross section of the tower 1. To protect the cable 26, a fence is installed on the tower. The door of the cabin can be installed in the side wall 7 The tower crane works as follows.

In the initial position, the cab 5 is located at the bottom of the tower 1 on the shock absorber 27. When the crane is operating, the cab can be installed at any level, for which the clutch 17 is activated, the brakes 20 and 24 are released and the engine 19 is switched on. after which the winch is disconnected, clutch 17 is disconnected and at the same time brakes 20 and 24 are applied. Cab 5 is fixed at a given point of tower 1. Moving the operator in the cab to a specified height reduces operator fatigue, improves visibility, reduces time Just a crane and generally improves the reliability of his work.

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Claims (2)

Invention Formula 1- A tower crane containing a control cabin, made with a door and windows for a circular view, installed in the side walls of the cabin, a bracket fixed in the upper part of the crane tower and carrying at least one deflecting unit, bending around a flexible member, to one end of which a cab is suspended and the other end is connected to a cab lifting drive including a crane winch engine, and two guides for cab running parts different in order to increase reliability. it is provided with at least one additional cabin guide and chassis, the latter being equipped with a closed internal wall in which the door is installed, and in the ceiling and the floor of the cabin holes are made limited by the internal wall, while the cabin is mounted the cab guides, running gears and guides in the plan are located at the vertices of the corresponding polygons, and the cab hoist drive includes a drum on which the second end of the flexible member is fixed, mechanical a drum brake and a controlled clutch, by means of which the drum is kinematically connected with the engine of a cargo winch. 2. The tower crane according to claim 1, characterized in that it is provided with a shock absorber mounted at the bottom of the crane tower in the movement zone of the control cabin. 15 (///////////////// Fig. / 26 eleven one Fig 3 W