RU2457172C1 - System of container position on fork clamp monitoring - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to machine building, in particular to load lifting equipment and can be used in frontal loading trucks. System of container position on fork clamp monitoring contains information panel, position resolver containing housing, immovable magnetically controlled contacts evenly distributed along body, and pendulum with constant magnet installed on its end. Position resolver housing is filled with damping fluid, and pendulum has orifices in it the diameter and number of which can vary.

EFFECT: truck loader functionality enhancement.

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Description

The invention relates to mechanical engineering, in particular to lifting equipment, and can be used in wheel loaders.

A well-known forklift truck (Aleksandrov MP Hoisting-and-transport machines: a Textbook for engineering schools. - 2nd ed., Revised. - M .: Mashinostroenie, 1984, pp. 44-45, Fig. 38, 39) having a movable platform with a lifting load gripping device in the form of a fork mounted on a frame. The frame can be tilted forward or backward at an angle of up to 10 ... 15 °.

The reasons that impede the achievement of the technical result indicated below is that the position of the load on the forks is controlled by the operator visually from the cab at a distance from the working body, and when the loader moves along an inclined surface, the load can tip over or slip off the forks.

A known control system for a loading and unloading device (RF patent for the invention No. 2309116, IPC B66F 17/00) containing a sensor for measuring the tipping moment, providing an input signal to the controller, which in turn is sensitive to influence the operation of the actuator. When the overturning moment approaches the threshold value, the speed of the cargo gradually decreases.

The reasons that impede the achievement of the technical result indicated below is that when the tipping moment approaches the threshold value, the speed of the cargo decreases and the load is not aligned horizontally.

The problem to which the invention is directed is to increase the convenience of monitoring and controlling the front loader forks from the operator’s workplace.

The technical result is the exclusion of tipping and sliding of the load from the forks when the loader moves.

The specified technical result is achieved by the fact that a position sensor filled with a damping fluid and containing a pendulum with throttle holes is installed on the forks, a permanent magnet is installed on its end, and sealed magnetically controlled contacts (reed switches) are fixed on the sensor body, the signal from which is fed to the information panel into the operator's cab, showing the horizontal inclination of the forks with the container.

The analysis of the prior art by the applicant, including a search by patent and scientific and technical sources of information, made it possible to establish that the applicant has not found an analogue characterized by features identical to all existing features of the claimed object.

Therefore, the claimed invention meets the requirement of "novelty" under the current law.

Figure 1 shows a schematic diagram of a system for monitoring the position of the container on the forks, figure 2 is a position sensor, figure 3 is the installation location of the position sensor on the forks, figure 4 is the appearance of the information panel.

The device consists (Fig. 1) of a sensor 1, an information panel 2 and a voltage stabilizer 3. As a source of the signal for the angle of inclination, sealed magnetically controlled contacts (reed switches) S1, S2, S3, S4, S5 are used, placed on an arc, the reed switches are connected through current-limiting resistors R1, R2, R3, R4, R5, respectively, to the anodes of the LEDs VD1, VD2, VD3, VD4, VD5, the cathodes of which are connected to a common wire - ground. The upper terminals of the reed switches S1, S2, S3, S4, S5 are connected to each other and connected through the voltage regulator 3 to the on-board network of the loading unit.

The position sensor (Fig. 2) consists of a sealed housing 4, a cover 5, eyes 6 for mounting the sensor on the sensor body, a pendulum 8 is suspended on the axis 7 on the axis 7, a permanent magnet 9 is installed at its end, throttle holes 10 are made in the pendulum. In the sensor housing, on a arc of a radius of rotation of magnet 9, a sector rail 11 is mounted with reed switches S1, S2, S3, S4, S5, the leads from the reed switches are output from the sensor housing 4 through connector 12 and then to the information panel 3 via a multicore cable. In the sealed housing 4 is a damping fluid 13, the plug 14 seals the filler hole in the housing 4.

The position sensor 1 (Fig.3) is attached to the forks 15, on which the container 16 is located.

Visualization of the angle of inclination of the load on the forks relative to the horizontal is carried out through the information panel 17 (Fig.4), located in the operator's cab. The panel has five filters: red 18, orange 19, green 20, orange 21 and red 22, with images of the corresponding tilt angle of the forks.

The operation of the device is as follows.

When the forks 15 (FIG. 3) with the container 16 are in a horizontal position, the position sensor 1 is strictly in an upright position. The pendulum 8 of the sensor (figure 2) with a permanent magnet 9 are strictly vertically and symmetrically with respect to the housing 4 of the sensor. The magnet 9 is opposite the reed switch S3, which closes under the influence of a magnetic field, as a result of which the electric current from the onboard network of the loading unit through the stabilizer 3 (Fig. 1), the reed switch S3, the current-limiting resistor R3 flows through the green LED VD3. On the information panel (Fig. 4), a light filter 20 is lit, indicating that the container is in the neutral position.

When the fork 15 is tilted (Fig. 3) to the left by a certain angle, the container 16 also tilts at the same angle, along with the fork 15, the position sensor 1 is tilted. When the sensor body 4 is tilted (Fig. 1) to the left of the vertical, the pendulum 8 sec with a permanent magnet 9 they try to return to a vertical position under the action of gravity, and then the magnet 9 stops opposite the reed switch S4, which closes under the influence of a magnetic field and passes current from the stabilizer 3 (Fig. 1) through the current-limiting resistor R4 to the LED VD4, starts to shine the color filter 21 is shown in orange (Fig. 4), informing the operator that the load is tilted and that it needs to be leveled by means of the fork tilt control system.

With a large angle of inclination of the forks 15 to the left, the pendulum 8 will occupy the leftmost position in the housing 4, the magnet 9 will be installed opposite the reed switch S5, the current will pass through the current-limiting resistor R5 and the LED VD5. The filter 22 lights up in red, informing the operator about the critical tilt of the forks and making decisions on immediately equalizing the load horizontally.

When the fork 15 is tilted to the right, the system operates in the same way, the filters 18 or 19 are lit.

In the case when the magnet 9 occupies a position between the reed switches, for example, S3 and S4, then the LEDs VD3 and VD4 and, accordingly, the filters 20 and 21. The magnet 9 can occupy such intermediate positions when the loader and the container move along a rough surface, thereby causing the pendulum to oscillate 8. In this case, the flashing of various filters can misinform the operator about the actual position of the load, in order to calm the vibrations of the pendulum 8, there is damping fluid 13 in the housing 4 of the position sensor 13. The speed of the pendulum and 8 in the housing 4 with the liquid 13, and thus the delay time control system of the container on the forks depend on the diameter and the number of the throttle holes formed in the pendulum 8.

Thus, the above information indicates the fulfillment of the following set of conditions when using the claimed invention:

- the tool is intended to increase the convenience of control and management of the front wheel loader forks from the operator's workplace;

- the tool embodying the claimed object is capable of achieving the achievement of the technical result perceived by the applicant.

Therefore, the claimed invention meets the requirement of industrial applicability under applicable law.

Claims (1)

A control system for the position of the container on the forks containing a dashboard, a position sensor comprising a housing, fixed magnetically-controlled contacts evenly distributed along the housing, and a pendulum with a permanent magnet mounted at the end, characterized in that the housing of the position sensor is filled with damping fluid, and in the pendulum throttle openings are made, the diameter of which and their number may be different.

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