SU1588592A1 - Truck loader - Google Patents

Abstract

The invention relates to specialized rolling stock, in particular to vehicles equipped with self-loading lifting devices. The purpose of the invention is to increase reliability, simplify switchgear design and control. The self-loading vehicle consists of the chassis 1, the portal 2, the main hydraulic cylinder 3 tilting the portal, the additional hydraulic cylinder 4, the support 5 with the shoe 6 pivotally connected to the chassis, and a sequential valve of cylinders made in the form of a hydraulic valve of pressure difference installed in the trunk the rod end of the auxiliary cylinder 4, and its control line is connected to the lineless rod cavity of the specified cylinder between the latter and the throttle in the same line. 2 Il.

Description

The invention relates to a specialized rolling stock, in particular to vehicles. equipped with self-loading equipment.

The purpose of the invention is to increase reliability, simplify switchgear design and control.

Figure 1 shows the self-loader, general view; on - hydraulic circuit of the device.

The self-loading vehicle consists of a chassis 1, a cargo boom made in the form of a portal 2, a main hydraulic cylinder 3 tilting a portal, an additional hydraulic cylinder 4, a support 5 with a shoe 6 pivotally connected to the chassis.

The single-section four-line three-position valve 7 by the pressure line 8 is connected to the pump 9, and the drain line 0 is connected to the tank 11. The cavities of the hydraulic cylinders equipped with hydraulic locks 12 and the throttles 13 are connected unevenly. , and its control line 16 is connected to the hydroline of the rodless cavity of the cylinder 17 between the last and the throttle in the same line.

The loader works as follows

The working fluid under pressure comes from the pump 9 through the main lines 8 and 18 through the hydraulic lock 12 and the backboard 00 00

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the valve 19 into the rodless cavity A of the main, hydraulic cylinder 3, due to the extension of its rod, the portal 2 together with the hydraulic cylinder 4 and the support 5 with the shoe 6 inclines towards the trunk line 14 and 18 at the same time, are disconnected by valve 15 After the portal has reached the border of the vehicle position, which is stable without supports, the shoes 6 of the supports 5 abut against the supporting surface. As a result, pressure rises in the cavity B of the auxiliary hydraulic cylinder i, resulting in pressure increase; 16, kla An .15 and lines 14 and 18 are triggered; they are connected, thereby turning into a hydraulic cylinder 4c after work. After this, the cylinder, when the cylinders work together, is in the required position for loading; After slinging, the distributor switches the direction of fluid flow and It enters under pressure already into line 20 and through lines 21 and 22 into hydro1; linear pressure, which arises in cavity B of the additional cylinder, acts on line 16 on valve 15 and connects lines 14 and 18, thereby providing joint I work hydraulic cylinders “After reaching; the portal position, at which the position of the self-loader is stable: without supports, is detached from: the surface of the support 5, which ensures the stability of the vehicle at the moment of separation of the load from the supporting surface, Then the portal is moved together with the additional; .the hydraulic cylinder and support ,,

Connecting the control valve 16 hydraulic valve 15 to the additional hydraulic cylinder between its rodless cavity and the throttle ensures that the pressure in line 16 is in excess of pressure in line 23 when the portal turns to the loading zone because the portal has a self-loading position that is stable without the supports, and the connection to the operation of the additional cylinder, the effect of the displaced masses on the cylinders is such that the pressure in the actuator is necessary only for filling with fluid izhhenii. shtokov bands 10

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Hydraulic structures, a / y1 to prevent the speed of displacing fluid from exceeding the speed of the incoming speed, installed throttles, Fsh ensuring the smooth operation of the drive without a jerk, specified throttles are installed before the hydraulic locks.

Claims (1)

Invention Formula A self-loading vehicle containing a chassis, a cargo boom hinged on the chassis with the possibility of rotation in a vertical plane, a support with a shoe hinged on the chassis with the possibility of turning in the specified plane, two double-acting hydraulic cylinders, one of which is hinged to one end the boom and the support, and the other with the chassis and the boom and is located on the other side of the boom relative to one hydraulic cylinder, one cavity of which, increasing in volume as it moves, is communicated with By the hydroline of the distribution device connected to the source of working medium under pressure and discharge, the other cavity of one hydraulic cylinder communicates with the other hydraulic distribution device, and the other hydroline communicates with one cavity of the other hydraulic cylinder, decreasing in volume during its expansion, characterized in that , in order to increase reliability, simplify the switchgear design and control, it is equipped with a differential pressure hydraulic valve, throttle and non-return valve the latter two are installed in parallel between the distribution device and one cavity of one hydraulic cylinder, and the hydraulic valve of pressure difference between the distribution device and the other cavity of one hydraulic cylinder, one control chamber of the hydraulic valve of pressure difference communicates with one cavity of one hydraulic cylinder, and the other with its other cavity with the other cavity of another hydraulic unit communicated with another hydroline of the distribution device 2