RU94556U1 - CRANE PLATFORM SUPPORT DEVICE MANAGEMENT DEVICE - Google Patents

Abstract

 1. A control device for the supports of the platform of the crane containing the roll sensors oriented in two mutually perpendicular directions, the electro-hydraulic distributors of the hydraulic cylinders of the supports, the control unit, characterized in that on the mobile chassis above the rear axle is installed the control unit for separation of the wheels from the ground, equipped with an end switch issuing signal to the control unit. ! 2. The device according to claim 1, characterized in that the control unit is made in the form of a microprocessor system, simultaneously including the EGR of the hydraulic cylinders of those supports, the rise of which is necessary to level the crane platform.

Description

The utility model relates to hoisting mechanisms and is designed for hoisting cranes on a mobile chassis, working on supports.

A device is known for holding the platform in a horizontal position (description of the invention to the USSR copyright certificate No. 189538, IPC В66С, 12/21/1965). The device contains a photoelectric angle sensor, an amplifier and a relay circuit that supplies signals to electro-hydraulic valves that supply the necessary cavities of the power cylinders of the platform's outriggers. The photoelectric sensor is rigidly fixed to the crane running platform and consists of four geodetic ampoule levels placed in metal tubes. In the body of each tube there is a through hole through which light from light sources is passed. The light passing through the ampoule is focused by a gas bubble, acting on a photodiode connected through an amplifier to the working relay circuit, when triggered, the actuator of the outrigger is activated. When changing the angle of inclination of the platform, and with it the ampoule, the gas bubble shifts, reducing the illumination of the photodiode and turning off the signal to the actuator of the outrigger.

However, this device does not automatically stop lifting the platform from the transport position.

There is also a device for leveling a platform of a lifting machine (utility model description to the RF patent No. 59038, IPC В66С 23/80, 08/18/2006), containing four remote hydraulic bearings with hydraulic locks and a system for supplying and distributing liquid to the hydraulic cylinders of the bearings, four pressure sensors in the bearings , four three-position comparators, a unit for setting the pressure in the supports, a scaling amplifier, four electrohydrosolotters controlling the extension of the supports. The uniform distribution of the load between the pairs of outriggers (front and rear) and, as a result, the alignment of the platform, is achieved by using the pressure setting unit. The disadvantage of this device is the dependence of the specified pressure on the mass of the lifted load.

Of the known technical solutions, the closest in technical essence to the claimed device is a device for automatically aligning the support platform (description of the invention to patent No. 2342310, IPC B66C 5/00, B66C 23/78, 04/23/2007). The device comprises a rotary cab, a platform of a mobile chassis, an amplifying control unit, tilt sensors oriented in the longitudinal and transverse planes of the platform, a rotary support, a control panel, contact sensors of the rods with the supporting surface, and hydraulic cylinders. After the sensors of the contact with the supporting surface are triggered, the platform lift stops and, if necessary, the platform is leveled to a horizontal position with a given angularity.

The disadvantage of this device is that the sensors of contact with the supporting surface do not take into account the deflection of the springs and, therefore, the platform is not lifted to such a height that, as necessary, the wheels come off the ground. Another disadvantage is that the alignment of the platform generally occurs in two stages: first in the transverse plane, then in the longitudinal. This increases the alignment time.

The objective of the utility model is to automate the process of lifting the crane platform from the transport position to the working position until the wheels completely lift off the ground and reduce the platform leveling time.

The specified technical result is achieved by the fact that the control device, including platform roll sensors oriented in two mutually perpendicular planes, electrodistributors (EGR) of the hydraulic cylinders of the supports, contains a control unit for taking the wheels off the ground, equipped with an end switch and mounted on the chassis above the rear axle of the chassis, and a control unit with a microprocessor system that simultaneously includes the EGR of the hydraulic cylinders of those supports whose lifting is necessary to align the position of the crane platform.

The utility model is illustrated by the accompanying drawings, in which Fig. 1 shows a control unit for taking the wheels off the ground, Fig. 2 shows a functioning algorithm of a control unit, Fig. 3 is a diagram explaining the calculation of the total bank angle α _ф and the angle of its direction φ.

The control unit of separation of the wheels from the ground (Fig. 1) consists of a plate (1), a pusher (2), a base (3), a holder (4) and a limit switch KB (5).

KB (5) is controlled by a pusher (2) mechanically connected to the rear axle of the chassis. KB is mounted on the base (4), mounted on the chassis frame. The device operates as follows. When the crane chassis wheels touch the ground, the pusher (2) is in position A. In this case, the KB stem (5) is extended and its contacts are open. In this case, the control unit (figure 2) through the OR circuit and amplifiers generates a signal Y _KB = 1 on the EGR of the hydraulic cylinders to raise the supports. When the wheels lift off the ground, the pusher (2) moves to position B and puts the stem KB (5) in the recessed position. In this closed contacts KB, whereby Y _KB = 0 (Figure 2) and lifting the platform from the transport position into the working is terminated.

Leveling the platform is as follows. By the control unit (Fig. 2), according to the signals of the roll sensors ДК _X and ДК _{Y, the} total roll angle α _Ф and the angle of its direction φ are calculated in accordance with the diagram (Fig. 3). _F The value α is compared with a maximum permissible value α _max. If α _Ф ≥ α _{max, the} choice of the EGR of the hydraulic cylinders of the supports, which must be included in the lift to equalize the position of the platform, depends on the angle of the roll direction φ in accordance with the algorithm of the control unit (figure 2). In this case, the signals (Y ₁ , Y ₂ , Y ₃ , Y ₄ ) to the selected EGR are fed through OR circuits and amplifiers at the same time. If α _Ф <α _max , Y ₁ = Y ₂ = Y ₃ = Y ₄ = 0.

The manufacture of the unit of separation of the wheels from the ground is carried out from the same parts as the device for blocking the lifting and turning the knees of the car lift (devices and safety devices for the lifts (towers). Educational-methodical manual, Ivanteevka, 2005, p. 39), a limit switch is installed instead of the valve . The microprocessor control unit is made using an accessible and widespread elementary base of wide consumption.

Claims (2)

1. A control device for the supports of the platform of the crane containing the roll sensors oriented in two mutually perpendicular directions, the electro-hydraulic distributors of the hydraulic cylinders of the supports, the control unit, characterized in that on the mobile chassis above the rear axle is installed the control unit for separation of the wheels from the ground, equipped with an end switch issuing signal to the control unit. 2. The device according to claim 1, characterized in that the control unit is made in the form of a microprocessor system, at the same time including the EGR of the hydraulic cylinders of those supports, the rise of which is necessary to level the crane platform.