SU1364599A1 - Tower crane - Google Patents

Description

(21) 40A6790 / 31-11

(22) 04/01/86

(46) 07.01.88. Bul № 1

(7) Kiev engineering and construction

institute

(72) A.A. Kostenyuk, S.Yu.Litus,

V.V. Lytus and L.E.Pelevin

(53) 621 .874 (088.8)

(56) Nevzorov L.A., et al. Tower cranes. M .: Mashinostroenie, 1979, p. 6-8, fig. 1.1 (4).

(54) TOWER CRAN

(57) The invention relates to a lifting and transport machinery. The purpose of the invention is to increase productivity by reducing cycle times. The tower crane contains a tower

1 with a horizontal boom 2 passing through it, a rotary platform 3, a cargo trolley with a telescopic galvanic console, load lifting mechanisms with a load-carrying element 8, movement of the cargo trolley and movement of the boom 12. The latter contains a rack 13 attached to the boom 2 and mounted on platform 3 is a gear wheel 14. Tower 1 is mounted on the chassis frame 15 with a crane movement mechanism and ballast. The boom 2 has a box-section with an opening on the side surface for the passage of the cantilever, support rollers for receiving torque, end switches 1A

(L

Telephones 18 and shock absorbers 19. Tower 1 has a through opening 20 for passing the boom 2 and a side opening coaxial with the side opening of the boom 2. A rope 22 is attached to both ends of the boom 2, passing over the top of the tower 1 through the tension block 23 s. elastic element 24. 4 Il.

one

The invention relates to a lifting machinery industry and can be used in the construction of tower cranes for operation in all sectors of the national economy, especially in the construction of residential buildings and civilian buildings, as well as in a wide variety of industrial construction conditions.

The purpose of the invention is to increase productivity by reducing cycle times.

Figure 1 shows the crane, a general side view; figure 2 - boom with a cargo truck, side view; figure 3 is a view And in figure 2; figure 4 - section bb in figure 1.

The tower crane contains a tower 1 with a horizontal boom 2 passing through it, a turntable 3, a load lifting mechanism consisting of a cargo trolley 4, an electric hoist 5, a telescopic arm 6 rigidly attached to it, a block 7 and a load-lifting element 8, guide rollers 9, the mechanism for moving a cargo truck with a gearmotor 10 and wheels 11, an arm movement mechanism 12 with a gear rack 13 attached to the boom 2 and engaging with the gear wheel 14 located on the swivel platform 3, chassis 15 s mehan movement of the crane and ballast. The boom 2 has a box section with an opening 16 on the side surface for passing the cantilever 6, support rollers 17 for receiving torque, limit switches 18 and damping devices 19.

The tower 1 has a through opening 20 for the passage of the boom 2 and a side opening 21 coaxial with the side opening 16 of the boom 2. A rope 22 is attached to both ends of the boom 2, passing over the tip of the lash 1 through the tension block 23 with an elastic element 24. For

reduce friction between the console 6 and boom 2 on the console 6 mounted support rollers 25.

Tower crane works as follows.

When the electric hoist 5 is in operation, the load is lifted to the required height. The cargo is moved by a gearmotor 10 and a cargo trolley 4. In order to reduce the time of cargo movement, simultaneously with the gearmotor 10, the boom movement mechanism 12 is activated, which moves together with the boom 2 and the load carriage 4 with a load. When the cargo approaches the bach 1, the telescopic console 6 is pushed out of the load trolley 4, allowing the load trolley 4 and the boom 2 to move the load past the tower 1, without touching it, to a predetermined position.

When the boom 2 is located in the extreme right or left position, large bending moments occur as perceived by the metalwork of the tower 1. A rope 22 is used to reduce the stresses attached to both ends of the boom 2 and passing through the top of the tower. During the reciprocating movement of the boom 2, the rope 22 changes the value of the tension. To compensate for this tension, an elastic element 24 is provided with a block 23.

Claims (1)

Invention Formula A tower crane comprising a tower, installed in the opening of the horizontal box boom, the ends of which are located on both sides of the tower, and mounted inside the boom with the possibility of a longitudinal movement from the drive along its entire length a cargo trolley with a load gripping element, so that , in order to increase productivity by reducing the cycle time, the boom is mounted with the possibility of reciprocating movement from the drive relative to the turret opening, the load-bearing element flax on trolley FIG. g 2 It d t U / U /////// 77A 7 ///. 364599 by means of a horizontal telescopic console, and the boom and turrets are made with additional openings for the passage of the console when moving the cargo cart. viewA Fig.Z FIG.