RU1810444C - Hydraulic drive of earth-moving machine - Google Patents

Abstract

FIELD OF THE INVENTION This invention relates to hydraulically driven earthmoving machines for controlling 18 77 te mounted equipment. SUMMARY OF THE INVENTION: the hydraulic actuator comprises a tank 1, from which liquid enters the make-up pump 2, which is connected via a ripping valve 3 with remote control, a radiator 4, a filter 5, and a safety valve 6 to an adjustable pump 7. The latter is connected by a high pressure pipe with a hydraulic motor 8 via a safety valve 9. An adjustable hydraulic pump 7 is connected to the tank 1 using the safety valve 10, and to the pressure line 11 through the check valve 12. The valves 13, .14, 15 and 16 are connected are coupled with the hydraulic cylinders of the bulldozer equipment 17, 18 and the hydraulic cylinders for controlling the working body 19 and 20. The latter are connected to the tank 1 through a filter 2. 1 il. ate with

Description

The invention relates to earth moving machines and can be used in other fields of transport engineering.

An object of the invention is to simplify the hydraulic drive structure of a vehicle and reduce the manufacturing cost thereof.

The drawing shows a schematic diagram of the hydraulic drive of an earth moving machine.

The hydraulic actuator contains a tank 1, from which the liquid enters the water pump 2, which through a safety valve with remote control 3 and a safety valve with remote control 3 and a safety device consisting of a radiator 4, a filter 5, as well as a safety valve 6 is connected to an adjustable pump 7. The latter is connected by a high pressure pipe to the hydraulic motor 8 via a safety valve 9 with remote control.

The adjustable hydraulic pump 7 is connected via a pressure relief valve 10 with a remote control 1 to the tank 1, and to the pressure line 11 through a non-return valve 12. The control valves 13, 14, 15 and 16 are connected to the hydraulic cylinders of the bulldozer equipment 17 and 18 and the control cylinders of the working body 19 and 20. The latter are connected to the tank 1 through a filter 21. The pressure in the hydraulic cylinders 19 and 20 is supported by the safety valves 22 and -23, and in the low-pressure line 24 by the safety valve 25. In the line between the make-up hydraulic pump 2 and control valves 13, 14, 15 and 16, a check valve 26 is installed. The hydraulic motor 8 is the actuator of the creeper actuator, which is shown in the drawing by position A.

. The hydraulic actuator operates as follows.

Work on attachments is accomplished by activating a remote control safety valve 9. At operating pressure. The fluid from the regulated pump 7 enters through the non-return valve 12 into the pressure line 11. By switching on the control valves 13, 14, 15 and 16, the operation of hydraulic cylinders 17, 18, 19 and 20 is controlled, therefore, and the actuators of the attached equipment. The pressure in the piston cavities of the hydraulic cylinders 19 and 20 is maintained by the safety valves 22 and 23.

The operation of the creeper is carried out by turning on the safety valve 9 with remote control for unloading, and the safety valve

It has a working pressure, while the control valves 13, 14, 15 and 16 are in the middle position. The fluid from the adjustable hydraulic pump 7 through the safety valve 9 enters the hydraulic motor 8,

0 which drive the actuator creeper reducer.

In order to operate simultaneously with the creeper and attachments, it is necessary to switch on for unloading

5 of the safety valve 9 and the operating pressure of the safety valve 10.

The pressure that occurs in the pressure line from the work of the reducer to move the machine is sufficient to

0 drive by the executive body of the mounted equipment with hydraulic cylinders i7, 18, 19 and 20, for which it is necessary to turn on the corresponding valve. .

In case of failure of the regulated 5-coca hydron 7 by switching on the safety valve 3 to the operating pressure, the recharge pump 2 is put into emergency operation. The fluid from the hydraulic pump 2 through the check valve 26 enters the on-port line 11..

This hydraulic drive will simplify the design of the hydraulic drive and the whole machine as a whole, more efficiently use the power of hydraulic pumps and

5 to reduce its manufacturing cost by canceling 2 power hydraulic pumps and one make-up hydraulic pump with drives, one liquid tank and connecting pipelines to them.

Claims (1)

0 Claims Excavator hydraulic drive, including an adjustable hydraulic pump, in communication with the high pressure pipeline with the first safety 5 with a valve and a hydraulic motor, a pressure reducer, and a make-up hydraulic pump connected through a second safety valve to the tank, connected to the tank and through a safety device with an inlet of the adjustable hydraulic pump, attachment hydraulic cylinders connected to the control valves, the pressure line of which through the first and second check valves connected to a hydraulic pump 5 and a third pressure relief valve, in which, in order to simplify the design of the hydraulic actuator, the pressure line is leu connected on one side through a check valve to a conduit of high the pressure in the area by the first safety valve in the area between the outlet of the pre-preferred valve installed by the after-pump and the third safety valve respectively to the hydraulic reducer, valve installed between the output and an adjustable hydraulic pump, and on this pump and safety section of the high-pressure pipeline with a che-device, while the pressure setting cut the second safety valve soe-5 of the first safety valve above Dinin with the tank, and on the other hand, through the pressure settings of the second safety valve, the second non-return valve with the make-up valve.