RU184415U9 - Weighting device of a timber truck with hydraulic manipulator - Google Patents

Abstract

The utility model relates to weighing equipment and can be used on timber trucks equipped with hydraulic manipulators on the rear overhang of the frame. The technical task is to expand the ability to measure the mass of the load being lifted on timber trucks. fluid in the pressure and drain lines of the boom lifting hydraulic cylinder having a primary angle sensor ktsii arrows universal sensor angle and length of the overhang of the telescopic boom sections and force measuring sensors installed in the front car tire valves of the wheels. 5 ill.

Description

The utility model relates to weighing equipment and can be used on timber trucks equipped with hydraulic manipulators on the rear overhang of the tire pressure control systems for tires that have timber trucks KAMAZ, URAL or other cross-country vehicles to determine the mass of the transported cargo and load distribution on the vehicle’s bridges .

A device for weighing cargo is known, comprising a load transport mechanism, load cell weight sensors mounted on a load transport mechanism, an amplification-conversion unit electrically connected to the sensors and a light display display of the load ("Crane scales with a digital electronic display KGW1 100". ENP Steuerungs- und Wagetechnik Gmbh. Technical Description N 3/94/4000/500). Devices for weighing cargo of this type are equipped with a radio channel for transmitting information at a distance of up to 1000 m to a personal computer.

The disadvantages of this device are the low reliability of the balance, because it is built on the reliability of the load cell and its measuring channel and the failure of the sensor leads to a failure of the entire device.

A device is known, which is a crane load limiter, in which the actual load of the crane is measured by measuring the pressure in the hydraulic cylinder for lifting and lowering the boom and the parameters of its spatial position, and overload signals or blocking the movements of the crane are generated by an electronic device. Moreover, a throttle-type damping device is installed in the hydraulic pressure measurement channel, eliminating the effects of hydraulic shocks, pulsations and pressure fluctuations on the pressure sensor element (primary transducer) (RF patent No. 2483016, IPC B66C 13/16, published on 05.27.2013).

The disadvantage of this device is only the formation of signals of overload or blocking the movements of the crane.

A cargo transport device is known (utility model patent No. 149434, IPC B66C 13/16, published 04.12.2014), comprising a cargo transport mechanism with load cell load sensors installed thereon, an amplification converter block electrically connected to load cell sensors, and a display for display of weight loads, characterized in that the cargo transport mechanism is a car with a hydraulic manipulator equipped with a clamshell gripper, and one load cell mounted in the form of t nzoosi grapple attachment to the boom hydraulic manipulator, the other force-measuring sensors installed in the tire valves on the rear wheels - prototype.

The disadvantage of this device is the replacement of the axis of the gripper with a specially made part with a built-in strain gauge.

The technical task is to expand the ability to measure the mass of the lifted load on timber trucks equipped with hydraulic manipulators on the rear overhang of the frame, simplifying the design and reducing the cost of installation on the car.

In FIG. 1 shows a hydraulic manipulator of a logging truck with sensors installed, FIG. 2, 3, 4, 5, the sensors that are installed in the device are shown.

The device has several sensors installed on the hydraulic manipulator of the timber truck (Fig. 1), two of which are pressure sensors for the working fluid (Fig. 2) in the manipulator hydraulic system, have the shape of a cylinder and are installed in the pressure and drain pipelines of the main hydraulic cylinder and are formed during operation electrical signal. The sensors have a degree of protection against environmental influences IP 56, temperature range С ° from -40 to +55, therefore they can be operated without protection devices.

To take into account the working length of the boom of the hydraulic manipulator (Fig. 1), the design provides an angle sensor for the main section of the boom, which has a built-in absolute angle sensor of the DU-180 type (Fig. 3) and a universal sensor of the DDS-15 type (Fig. 4) for determining the angle the inclination and departure of the folding telescopic boom section, oriented to telescopic booms with an extension of up to 15 m and installed at the junction of the boom sections (Fig. 1). A universal sensor measures the folding angle of the telescopic boom section relative to the main one during operation.

To expand the functionality in this device, electronic air pressure sensors (Fig. 5) are used in the tires of the wheels of the car. Sensors are installed in tire cranes of the front wheels of a cross-country vehicle equipped with a tire pressure regulation system.

The controller is electrically connected to pressure sensors 1 in the hydraulic system of the manipulator (Fig. 1), sensors for determining the angle 2 and the angle and departure of the boom 3 and sensors for air pressure in the tires (Fig. 5) and is an industrial programmable controller having at least two analog inputs .

The device operates as follows. The pressure sensors in the hydraulic system of the manipulator 1 convert the pressure of the working fluid into an electrical signal proportional to the mass of the load and the working arm of the boom. Sensors for determining the angle of 2 and the angle and departure of 3 sections of the boom give an electrical signal proportional to the working arm of raising timber. The air pressure sensors in the front wheels of the car (Fig. 5) determine the presence or absence of cargo on the vehicle platform.

When lifting the load with a hydraulic manipulator, the load from the moving load is received by its supporting devices, signals from the pressure sensors 1 in the hydraulic system and the sensors for determining the angle of inclination 2 and the angle and departure 3 of the boom sections are sent to the controller, processed, and thus the mass of the lifted load is determined. When the boom of the hydraulic manipulator is above the cargo platform of the timber truck, the front wheels of the car partially accept the load, and pressure increases in them. Pressure sensors (Fig. 5) captures this change, the signal arrives at the controller and the readings of the mass of the load being lifted are summed only when lowering the load to the platform. The controller captures information about the mass of timber, storing data in memory.

During subsequent loading, the data are summarized, thereby determining the total mass of the cargo on the car. The program for the controller can be written in CoDeSys, Lunix, etc. All elements of the device must have a degree of protection IP 56.

Claims (1)

The weighing device of a logging truck with a hydraulic manipulator is a cargo transport device equipped with a clamshell gripper, force measuring sensors of a grab gripper of a hydraulic manipulator and tire cranes of automobile wheels, having an amplification-converting unit, electrically connected with force measuring sensors and a display for displaying weight loads, which is characterized by the fact that a car with a rear hydraulic manipulator, in the hydraulic system of which is installed There are working fluid pressure sensors in the pressure and drain lines of the boom lifting hydraulic cylinder, which has a tilt angle sensor for the main boom section, a universal tilt angle and departure length sensor for the boom telescopic section, and load sensors installed in the tire valves of the front wheels of the vehicle.

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