RU2787541C1 - Outrigger of lifting machine - Google Patents

Abstract

FIELD: hoisting and transport engineering.

SUBSTANCE: invention relates to the field of hoisting and transport engineering, namely to hoisting machines and can be used, in particular, in the design of the support circuit for mobile cranes. The outrigger of the hoisting machine contains a base, in which a vertically oriented suspension hydraulic cylinder is placed, fixed with its upper end to the base and having a ball heel screw at the lower end resting against the thrust bearing. The support is equipped with a retractable beam placed with the possibility of vertical movement and fixation in the base coaxially with the suspension hydraulic cylinder, and the screw at the lower end of the suspension hydraulic cylinder is provided with a union nut on which the retractable beam rests. The base can be provided with a latch with a spring, and holes are made in the retractable beam to receive the latch. The sliding beam is in contact with the side walls of the base through the sliding stops.

EFFECT: elimination of the possibility of subsidence of hydraulic cylinders for hanging outriggers when they are in the working position for a long time.

3 cl, 5 dwg

Description

The invention relates to the field of hoisting and transport engineering, namely to hoisting machines and can be used, in particular, in the design of the support circuit for mobile cranes, as well as in other areas.

It is known the supporting device of a lifting vehicle (European patent EP 0072697 (A1), IPC B66C 23/80; E02F 9/08, 1983-02-23) in which the remote device of wheeled working machines consists of a fixed box mounted on a wheeled movable body, retractable beam installed with the possibility of location in a horizontally oriented fixed box, and a vertically oriented jack hydraulic cylinder. The device has a thrust bearing at its lower end, pivotally connected to the front end of the drawer, while the cylinder of the jack is rotatable around the hinge axis between the vertical position and the transport position, in which it is retracted inside the drawer. Thus, the design of the suspension hydraulic cylinder swinging relative to the vertical axis is described. In the transport position, when the support is retracted, it deviates from the vertical axis and folds into the support. In the working position, when the support is extended, it assumes a vertical position with the help of the rod system described in the patent. The mechanism for transferring the suspension hydraulic cylinder from the transport position to the working position and back, as well as the system for its fixation in these positions, is described.

Known support contour lifting machine (utility model RU 118626 U1, IPC V66S 23/78, published: 27.07.2012). This support circuit (see Fig. 1 a and b) has four swing-out supports (1) mounted on the frame (2). The front and rear parts of the frame are raised above the level of the middle part and are provided with brackets (3) and (4) for mounting the supports. The middle part of the frame is made in the form of an octahedron. Rotary elements (5) of supports are mounted on vertically inclined axes (6) of respective brackets (3, 4). In the rotary elements (5) of the outriggers there are retractable beams (7) with sliding support posts (8) installed in them (vertically oriented suspension hydraulic cylinders). The rotary elements are rotated on the axes (6) by means of horizontally oriented hydraulic cylinders (9) of rotation, pivotally attached to the frame and rotary elements. Retractable beams (7) move relative to the rotary elements with the help of horizontally oriented hydraulic cylinders (10) for extending the beams, pivotally connected to the beams and rotary elements.

Rotary-retractable supports in the expanded state (see Fig. 1 a) increase the support contour of the machine, increase its stability, and also unload axles and axles of the automobile chassis from the impact of work loads.

Known outrigger hoisting machine, containing a base in which is placed a vertically oriented suspension hydraulic cylinder, retractable element (rod or screw) with a ball heel interacting with a spherical recess in the base plate, and a means of returning the base plate after removing the load to a position perpendicular to the axis of the retractable element , characterized in that the means for returning the base plate after removing the load to a position perpendicular to the axis of the retractable element is made in the form of a cylindrical compression spring, installed at one end in a stepped, conical-cylindrical hole in the ball heel of the retractable element, and with the other - in the hole made in the spherical recess of the base plate (patent for invention RU 2150424 C1, IPC V66S 23/78, published: 06/10/2000).

The outrigger structures are equipped with a vertically oriented suspension hydraulic cylinder, which ensures the separation of the wheels of the base chassis from the ground in the working position of the machine or the unloading of the chassis axles without wheel separation, as well as a screw that performs the same function. In the first case, the hanging of the machine is fully automated using hydraulics. In the second case, the rotation of the screw can be provided by an electric motor or performed manually.

Both options have a number of disadvantages: the suspension hydraulic cylinder under continuous load may experience spontaneous axial movement of the rod (sagging), caused by internal leakage of the working fluid between the rod and piston cavities, and the use of an electric drive in a machine that has a hydraulic drive for performing basic operations is not advisable from the design point of view. points of view.

The objective of the invention is to create an outrigger with a suspension hydraulic cylinder, which perceives the vertical axial load of the reaction of the support and makes it impossible for it to move spontaneously.

The technical result of the invention is to exclude the possibility of subsidence of the hydraulic cylinders for hanging outriggers when they are in the working position for a long time.

The specified technical result is achieved in an outrigger support of a hoisting machine, containing a base in which a vertically oriented suspension hydraulic cylinder is placed, fixed with an upper end to the base and having a screw with a ball heel abutting against the thrust bearing at the lower end, in that the support is equipped with a retractable beam placed with the possibility of vertical movement and fixation in the base coaxially with the suspension hydraulic cylinder, and the screw at the lower end of the suspension hydraulic cylinder is equipped with a union nut on which the sliding beam rests.

In addition, the base can be provided with a latch with a spring, and holes are made in the retractable beam to receive the latch.

In addition, the sliding beam is in contact with the side walls of the base through the sliding stops.

The invention is illustrated by drawings.

In FIG. 1a shows a general view of the support contour of the hoisting machine.

In FIG. 1 b shows the layout of the outrigger of the lifting machine in the prototype.

In FIG. 2 shows a general view of the placement of the proposed outrigger of the lifting machine.

In FIG. 3 shows the layout of the structural elements of the proposed outrigger.

In FIG. 4 shows the structural elements of the outrigger: sliding stops that perceive lateral loads, the nut stroke limiter in the lower position, the union nut on the screw and the spring-loaded retainer on the base with holes in the side wall of the retractable beam.

The drawings show:

1 - remote support base;

2 - retractable beam;

3 - suspension hydraulic cylinder;

4, 5 - sliding stops, perceiving lateral loads;

6 - screw with trapezoidal thread;

7 - union nut;

8 - nut stroke limiter in the lower position;

9 - latch;

10 - spring;

11 - thrust bearing;

12 - holes in the side wall of the retractable beam;

N - the direction of action of the reaction force of the support on the hydraulic cylinder.

The embodiment shown in the drawings of the outrigger of a lifting machine is shown primarily for illustrative purposes and should not be construed as limiting the scope of claims.

The outrigger of the hoisting machine contains a base 1, in which a vertically oriented suspension hydraulic cylinder 3 is located, fixed with its upper end to the base 1 and having a screw 6 with a ball heel at the lower end, abutting against the thrust bearing 11. The support is equipped with a sliding beam 2, placed with the possibility of vertical movement and fixation in the base coaxially with the suspension hydraulic cylinder 3, and the screw 6 at the lower end of the suspension hydraulic cylinder 3 is equipped with a union nut 7, on which the retractable beam 2 rests. to receive latch 9.

Such a combination of design features eliminates the possibility of subsidence of the hydraulic cylinders for hanging 3 outriggers when they are in the working position for a long time.

The retractable beam 2 is placed inside the base 1, is located coaxially with the suspension hydraulic cylinder 3 and rests on the side walls of the base 1 through the sliding stops 4 and 5. The suspension hydraulic cylinder 3 is fixed to the base 1 with its upper end, and at the lower end it has a screw 6 with a screwed nut 7. The lower end of the retractable beam 2 abuts against the nut 7. Thus, the nut 7 restricts the beam 2 from vertical downward movement. The movement of the nut 7 along the screw 6 is limited by the limiter 8.

When the suspension hydraulic cylinder 3 is extended, the screw 6 with the nut 7 screwed onto it moves vertically down. The retractable beam 2 moves down following the nut 7 under the action of gravity. , and retractable beams 2.

The screw 6 rests against the thrust bearing 11 located on the supporting surface. Thus, a support reaction force N arises, tending to push the suspension hydraulic cylinder back. In order to eliminate the influence of the reaction force of the support on the suspension hydraulic cylinder 3, it is necessary to start rotating the nut 7. Moving along the screw 6, the nut 7 will begin to move the beam 2 resting against it until one of the holes 12 becomes coaxial with the latch 9. When the hole is aligned with the latch, its spring 10 will move the latch 9, and it will enter the hole 12. A mechanical connection is formed between the retractable beam 2 and the base 1, which perceives the reaction force N of the support directed along the axis of the suspension hydraulic cylinder 3. The suspension hydraulic cylinder 3 is unloaded and stops perceive the reaction force of the support. Therefore, spontaneous movement of the suspension hydraulic cylinder 3 under the influence of external forces is excluded.

Thus, the invention achieves a technical result, which is the elimination of the possibility of subsidence of the hydraulic cylinders for hanging outriggers when they are in the working position for a long time.

Claims (3)

1. An outrigger of a hoisting machine, containing a base in which a vertically oriented suspension hydraulic cylinder is placed, fixed with its upper end to the base and having a ball heel screw at the lower end, abutting against the thrust bearing, characterized in that the support is equipped with a retractable beam placed with the possibility of vertical movement and fixation in the base coaxially with the suspension hydraulic cylinder, and the screw at the lower end of the suspension hydraulic cylinder is equipped with a union nut on which the sliding beam rests. 2. An outrigger according to claim 1, characterized in that the base is provided with a latch with a spring, and holes are made in the retractable beam to receive the latch. 3. Outrigger according to claim 1, characterized in that the retractable beam is in contact with the side walls of the base through the sliding stops.

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