RU147922U1 - DEVICE FOR BALANCING LOADING MACHINES - Google Patents

Abstract

A device for balancing hoisting machines, comprising a transverse beam having the ability to be mounted on a frame in the central part of the hoisting machine, a counterweight with a set of counterweights, and also a counterweight movement mechanism having communication with the device control mechanism, characterized in that the transverse beam is made in in the form of a welded profile and equipped with a bracket for installing a counterweight, the counterweight is made in the form of a Π-shaped frame formed from two pipes, in particular, a profile the cross section and the load-bearing plate, while the free ends of the pipes, as well as the bracket for installing the counterweight are equipped with roller bearings, the counterweight frame is placed inside the said transverse beam with the possibility of its longitudinal movement, and the frame movement mechanism is made in the form of a hydraulic cylinder located between the pipes and connected with said transverse beam and with a load-bearing plate by means of brackets.

Description

The claimed technical solution relates to the field of engineering, namely to lifting machines and can find application in the creation and improvement of mounted parts of machines, for example, designs of counterbalanced equipment pipe layers.

Widely known are various designs of equipment used in the construction of pipelines, hung on base machines, containing portals mounted above the tracks, rigidly connected to each other and to the frames of the undercarriage. The portals have hoisting equipment and a tilt-type counterweight, the center of gravity of which, when its departure changes, describes the curve in the horizontal plane. In the folded position, the counterweight is placed over the tracks (see the book “Pipelayers” by IM Vaschuk et al., M. Mechanical Engineering, 1989)

The disadvantage of this design is the large transverse dimensions, as well as insufficient longitudinal and lateral stability, due to the high location of the center of mass of the counterweight, as well as a change in the position of the center of mass during its extension.

A device for balancing a pipe-laying company of the company “FIAT-ALLIS” (see the book “Pipelayers” by IM Vaschuk et al., M. Mashinostroenie, 1989) is known, which contains a counterweight with levers mounted on a portal installed in the middle part of the frame of the base machine on the transverse beam. The counterweight is mounted using horizontal hinges directly on the car's trolleys. Carts are rigidly connected to the frame of the machine. The counterweight contains a frame with a set of counterweight and a pull-out mechanism. The extension mechanism contains a lever and traction. The lever at one end is pivotally connected directly to the carriage of the machine, and the other end is connected to the counterweight frame. The counterweight frame is kinematically connected to the link pivotally mounted on the portal. The disadvantage of this device is the limited departure of the counterweight, which when working with large loads, creates a risk of instability of the machine.

Also known is a device for balancing a pipe layer (Patent RU No. 2144156, class IPC F16L 1/00; B66C 23/00), which, in comparison with the above device, provides increased stability of the lifting machine. This device contains a portal and running trolleys, rigidly connected to the frame of the base machine, a counterweight with a set of counterweight loads and a mechanism for its extension with a rod and lever pivotally connected at one end to the running trolley and the other to the counterweight frame, which in turn is kinematically connected with traction pivotally mounted on the portal.

The increase in the counterweight offset is achieved due to the fact that the portal is mounted on the side members by means of additional brackets, and the kinematic connection of the counterweight frame with the rod is made in the form of a rocker arm pivotally mounted on the lever, one end connected to the rod, and the other through the intermediate link articulated with the counterweight frame .

However, due to the fact that this device, due to the large number of kinematic flexible pairs, has a generally non-rigid structure, at significant loads it is not sufficiently reliable in operation. The possibility of failure of individual nodes due to their wear is not ruled out.

The objective of the proposed technical solution is to increase the reliability and durability of the device for balancing lifting machines.

The technical result aimed at improving the reliability and durability of the device for balancing lifting machines is to increase the rigidity of the device by reducing the number of interacting kinematic pairs.

The technical result is achieved due to the fact that in the known device for balancing lifting machines, containing a transverse beam having the ability to install it on the frame in the Central part of the lifting machine, a counterweight with a set of counterbalanced goods, as well as a mechanism for moving the counterweight, having the ability to communicate with the control mechanism device, the transverse beam is made in the form of a welded profile and is equipped with a bracket for installing a counterweight, the counterweight is made in the form of a U-shaped frame formed of two pipes, in particular a profile section, and a load-bearing plate, the free ends of the pipes and the bracket for installing the counterweight are equipped with roller bearings, the counterweight frame is placed inside the said transverse beam with the possibility of its longitudinal movement, and the frame movement mechanism is made in the form a hydraulic cylinder located between said pipes and connected with said transverse beam and with a load-bearing plate by means of brackets.

The drawings show:

in FIG. 1 - device assembly;

in FIG. 2 - the device assembly (top view);

in FIG. 3 - counterweight assembly (with cargo and hydraulic cylinder);

in FIG. 4 - U-shaped counterweight frame.

A device for balancing a lifting machine, contains a transverse beam 1 (Fig. 1, 2), made in the form of a welded structure and installed in the Central part of the lifting machine on its frame (not shown in the drawings). The beam 1 is equipped with brackets 2 to enable its installation on the frame of the lifting machine (not shown in the drawings), as well as the bracket 3 (Fig. 1. 2). Counterweight 4 mounted on bracket 3.

The counterweight 4 (Fig. 3) contains a U-shaped frame formed of two pipes 5 and 5 ′, in particular, a profile section and a load-holding plate 6 with a set of weights 7 and 7 ′ (Fig. 3, 4). The ends 8 and 8 ′ of the pipes 5 and 5 ′ are provided with roller bearings 9 and 9 ′.

The bracket 3 (Fig. 1 and 2) for installing the counterweight 4 is equipped with roller bearings 10 and 10 ′.

The counterweight frame 4 is located in the cavity of the transverse beam 1 (Fig. 1 and 2) with the possibility of its longitudinal movement on the roller bearings 9 and 9 ′ inside the beam 1 and on the roller bearings 10 and 10 ′ under the action of a hydraulic cylinder 11 located inside the beam 1 between the pipes 5 and 5 ′. The hydraulic cylinder 11 is rigidly connected with the beam 1 by means of an arm 12, and with a load-bearing plate 6 by means of an arm 13. The load-bearing plate 6 is connected with a mechanism for controlling the movement of the counterweight (not shown in the drawings).

The operation of the device for balancing lifting machines is as follows.

When giving a command to extend the counterweight 4 from the counterbalance movement control mechanism (not shown in the drawings), the hydraulic cylinder 11 moves the counterweight 4, including pipes 5 and 5 ′, a load-holding plate 6 with a set of weights 7 and 7 ′, from the machine (not shown in the drawings shown). When the command to extend the counterweight is canceled, the hydraulic cylinder 11 moves the counterweight 4 into the beam 1.

The implementation of the device for balancing lifting machines, in particular pipe layers, with a counterweight located inside the fixed beam and controlled by a hydraulic cylinder, provides a compact device, increases the rigidity of the structure, which in turn increases the reliability and durability of the device. In addition, the presence of roller bearings 9 and 9 ′ at the ends 8 and 8 ′ of the pipes 5 and 5 ′, as well as the presence of roller bearings 10 and 10 ′ on the bracket 3 makes it easy to move the counterweight 4 inside the beam 1 with only one hydraulic cylinder, which simplifies the design of the device .

Claims (1)

A device for balancing hoisting machines, comprising a transverse beam having the ability to be mounted on a frame in the central part of the hoisting machine, a counterweight with a set of counterweights, and also a counterweight movement mechanism having communication with the device control mechanism, characterized in that the transverse beam is made in in the form of a welded profile and equipped with a bracket for installing a counterweight, the counterweight is made in the form of a frame of a Π-shaped form formed of two pipes, in particular, a profile sections, and a load-bearing plate, while the free ends of the pipes, as well as the bracket for installing the counterweight are equipped with roller bearings, the counterweight frame is placed inside the said transverse beam with the possibility of its longitudinal movement, and the frame movement mechanism is made in the form of a hydraulic cylinder located between the pipes and connected with said transverse beam and with a load-bearing plate by means of brackets.

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