SU1222584A1 - Vehicle bracket-swing crane - Google Patents

Description

The invention relates to a lifting-transport equipment, in particular to a lifting device mounted on vehicles, and can be used for the transport of bulky goods.

The purpose of the invention is to reduce the size of the device in the transport position and increase productivity by reducing the time for preparatory operations.

FIG. 1 shows schematically a cantilever-swiveling crane in the working position, its shape; in fig. 2 - the same, before lowering the column into the transport position; in fig. 3 - the same transport position; in fig. 4 — node I in FIG. one; in fig. 5 shows section A-A in FIG. four; in fig. 6 is a section BB in FIG. 3

A cantilever crane consists of a turntable 1 mounted on the chassis of a vehicle 2, vertically mounted on a turntable of a two-section slewing column 3, a telescopic boom 4 with a cargo hook 5 attached by means of a horizontal hinge 6 to the hydraulic drive column 7 for expanding the boom; hydraulic actuator 8 for changing the angle of the boom. The lower and upper sections of the column 3 are interconnected by a hinge 9. The hydraulic actuators 7 and 8 are double-acting hydraulic cylinders. On the lower section of the column, above the horizontal hinge 9, a spring-loaded hook 10 is mounted, which interacts when the crane is folded with a loop 11. The latter is rigidly attached to the end of the telescopic boom 4 at a distance from the hinge-6 axis equal to the minimum boom length, distance from the throat axis of the hook 10 to the axis of the same hinge 6.

The hook 10 is installed in the vertical movement guides 12 and 13 rigidly attached to the lower section of the column 3, and in the free position it rises upward by the spring 14 so that the nut 15 abuts against the guide 13.

In the lower section of the column 3, the fixing pins 16 are rigidly connected by a crossbar 17 with a spring-loaded hook 10 and moving in holes located coaxially with the pins 16 and fixed in the support brackets 18 rigidly attached to the upper section of the column 3. Hook 10, together with the locking pins 16, is able to move downward, compressing the spring 14, up to the stop of the cross member 17 into the guide 13.

Rotary support device 1 of the crane is equipped with a hydraulic drive rotation of the column 3 around its axis.

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Console-swivel; crane works as follows.

To lift the load, the crane is set to the working position (Fig. 1). The required reach of the boom 4 is set by the power cylinder 7, and the inclination angle is the hydraulic cylinder 8. After the load is attached, the boom from position II rises to position III, then the column H. with boom 4 and the load is rotated around the turntable axis until the load positioned above the load platform, after which the load is lowered by means of the power cylinders 7 and 8 onto the vehicle platform.

Folding the crane to the transport position (Fig. 3) is performed in the following sequence. The hydraulic cylinder 7 moves the boom to its minimum length. The boom 8 then lowers to the position shown in FIG. 2, while the loop 11 enters the throat of the hook GO and rests on it, then the hydraulic cylinder 8 switches to the floating position, and the hydraulic cylinder 7 expands the telescopic boom 4. At the beginning of the expansion of the boom, the loop 11 rests on the hook 10 and presses on it, moving the hook and the fixing pins 16 rigidly connected with it down until the cross member 17 rests against the guide 13, with the fixing pins coming out of the holes in the brackets 18, unfastening the upper section of the column relative to the bottom. With further expansion of the boom, the upper section of the column is rotated relative to the lower section around the axis of the hinge 9, it is gradually tilted and placed on the loading platform in the transport position (Fig. 3).

During the lifting of the upper section of the column, after it passes the position of unstable equilibrium (the center of gravity of the raised part of the crane is on the vertical passing through the axis of the hinge 9), simultaneously with the displacement of the boom sections the hydraulic cylinder 7 also lowers the entire raised part of the crane under the force her body. At the same time, the boom loop 11 acts on the spring-loaded hook 10 and, overcoming the resistance force of the spring 14, moves the hook 10 with the locking pins 16 downward, lowering their protruding parts into the apertures of the guides 12 and ensuring that the support surface of the brackets 18 freely adheres to the support surface of the guides 12. At this point, the upper section of the column is installed in the working (vertical) position. In this case, during the passage of the length of the path above the guides 12, which are equal to the height of the protruding part of the pins 16, by the thrust brackets 18, the rate of embedding of the latter should not be less than the speed of displacement of boom sections by a power drive 7, which is ensured by structurally known methods.

At the same time, upon reaching full boom shear reaching its minimum length, the hook 10 and the locking pins 16 are raised to the upper end position due to the compression force of the spring 14, fixing the upper part of the column in the working position. Then the loop 11 is disengaged from the hook 10 and the boom is set to the transport position.

The proposed crane design makes it possible to use it as a lifting device on vehicles for transporting large loads, reducing the overall height of the lifting device in the transport position, ensuring mechanical folding (without using manual operations) of the lifting device to the transport position due to boom sliding power drives. and change its angle of inclination, as well as reduce the duration and complexity of the preparation ovitelnyh operations.

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Compiled by V. Kuznetsov

Editor N. TupitsaTehred I. VeresKorrektor O. Lugova

Order 1659/19 Circulation 647Subscription

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

Claims (1)

VEHICLE CONSOLE AND ROTARY CRANE, comprising a rotary column vertically mounted on the chassis pivotally connected to a telescopic boom, and hydraulic actuators for extending the boom and changing its inclination, characterized in that, in order to reduce its dimensions in the transport position and “increase productivity by reducing time for preparatory operations, the rotary column is made of two sections interconnected by a horizontal hinge, the lower of which is equipped with a spring-loaded hook, laid above the horizontal hinge in the vertical guides, and fixing pins mounted in parallel, rigidly connected to the spring-loaded hook, and on the upper section there are made fixing holes located coaxially with the fixing pins, while at the end of the telescopic boom at a distance from the hinged connection of the boom with the column equal to with a minimum length of the boom, the distance from the throat of the hook spring-loaded and lowered to the lower position of the hook to the specified articulated joint is installed § loop, interaction Acting with a hook when deploying and folding the crane. SU „„ 1222584 φιη.1>