SU1313957A1 - Working equipment of power shovel - Google Patents

Abstract

The invention relates to road construction machines and allows to increase productivity by increasing the reliability of work when retrofitting from forward to reverse shovels and vice versa. The equipment includes a handle 1, a bucket 5 hinged to it, and a mechanism for rotating the bucket 5 with a hydraulic motor (HD) 14 in the form of a torque hydraulic cylinder and with a stopper mechanism (CM) 13 in the form of a hydraulic cylinder with a piston spring piston. The mechanism of rotation of the bucket 5 is made in the form of a roller bearing circle (DIC). its hydraulic control system. Moreover, 14 is installed coaxially to the OPK by means of a slot connection with it. There are stops 17 and 18 between the movable 11 and the fixed 8 parts of the PC. The hydraulic control system contains a three-position spool valve, having a neutral position, two spring-loaded normally closed hydraulic elements mounted on the stop 17, two check valves and a system of pressure and drain lines. When converting from a direct shovel to the reverse and vice versa, the operator acts on the spool valve and the working fluid is fed into the working cavity of the HDD 14. The working cavities of the HDD 14 are communicated with non-return valves with the rod working cavity CM 13 and through normally closed hydraulic elements communicated with the drain mainline. Piston cavity CM 13 communicated with the drain mainline. At the initial moment of time, detachment of the CM 13 occurs. Then the bucket 5 begins to rotate and the hydraulic elements are released. When you turn the bucket 5 to 180 ° the pushers of hydraulic elements abut against the stops 18, they move smoothly, and the rod cavity of the CM 13 is connected to the drain line. There is a fixation of the shovel 5 by means of the stem CM 13. 1 z. P. f-ly, 6 ill. (O (L so oo; o JV -GeieZ

Description

The invention relates to road construction machines, in particular, having devices for retrofitting front shovels to reverse ones.

The purpose of the invention is to increase productivity by increasing the reliability of work when converting from direct to reverse shovels and vice versa.

FIG. 1 shows a variant of the working equipment of a straight shovel; in fig. 2

hydraulic cylinders 2 on a tug 3, fixed pivotally with the upper flange of the fixed part 8. The turntable 4 is rotated with the fixed bucket 5 relative to the handle 1 around the axis of the finger 6. When replacing work equipment with a back shovel to the forward and vice versa excavator operator acts on the three-position spool valve 24 (Fig. 6), in this case the same reverse feed of the spade is supplied; in fig. 3 - a container of 10 barrels of fluid into one of the hydraulic structures of the rotator, sections 25 and the working cavity of the hydraulic valve; in fig. 4 shows section A-A in FIG. 3; body 14. At the initial moment of time

in fig. 5 - locking mechanism; in fig. 6 - the rotational movement of the roller support-hydraulic hydraulic control circuit 4 of the device 4 does not occur due to

The working equipment of the single-bucket hydraulic one, that the rod of the hydraulic cylinder of the stopper excavator contains a manual mechanism 13 is located in one of the

1, hydraulic cylinder 2 of the bucket control, pull 3, turntable 4 and bucket 5. The handle is connected to the bucket by means of fingers 6 and eyelets 7 welded to the fixed part of the turntable 4 20 tilting mechanism and then turning the bucket.

The turntable 4 contains a sub-spring of the 31 cylinder stopper located in

The movable part, consisting of the upper 8 and the unfolded state, acts on the spring 9 flanges connected between soshen 29 and the rod 30. With instant flash bolts 10, the movable part 11, the working pressure volume, an open roller separator 12, a stopper mech- . one of the check valves 26, ram 13 and hydraulic motor 14. The shaft 15 hydro-barrel pressure acts on the piston 29,

the motor is connected to the movable part 11, thereby compressing the spring 31 and by means of the groove connection 16. moving the rod 30 out of the groove. Bucket 5 starts

On the upper flange 8, the fixed hour is turned. When this occurs, the release of the turntable wheel 4, the location of the three-position valves 20.

The safety stops are 17, and on the sub- When the bucket is rotated 180 °, the pushers of three holes 19 are used to fix the bucket. The working pressure required to raise the locking mechanism is less than to turn the bucket. Therefore, in the initial part 11 there is a safety stop 18 and two holes 19 for fixing the bucket.

On safety stops 17 (Fig. 6), three-position normally closed hydraulic elements — spring-loaded spool distributors 20 — are connected, which are interconnected by a drainage main 21 and a drainage outlet 22 of an excavator. Cushioned hydraulic line 23 excava 35

positioning valves 20 abut against stops 18, while smooth movement occurs, and at the time the spool channel of the hydraulic line 21 connects to the hydraulic line 22 under the force of the spring 31 of the stopper mechanism 13, the working fluid is displaced from the rod cavity - the bucket 5 is fixed by means of the rod 30, which enters the hole 19 to fix the carpet through the three-position spool 40 sha. At this moment, the three-position distribution limit of the control unit 24 is connected by the operators in their normal (working cavity of the hydraulic motor 14 through the hydraulic line 25 and through check valves 26 and the hydraulic line 27 with the working rod of the hydraulic cylinder of the stopper mechanism 13, which is 45 It is hydraulically connected to the hydraulic line 21, and the distributors 20 to the hydraulic main line 22.

The locking mechanism 13 (Fig. 5) consists

closed state. The hydraulic system is again ready for operation. When the bucket reverses, a process similar to that described above occurs.

Claims (2)

1. Working equipment of a single-bucket excavator, including a handle, a bucket hinged to it, a bucket turning mechanism with a hydraulic motor and a locking mechanism, characterized in that, in order to increase productivity Flax coaxially with the roller support turntable by means of a groove connection with it, while the roller bearing turntable is provided with stops placed between its movable and fixed parts. 2. Equipment under item I, characterized in that the hydraulic control system is made in the form of a three-position spool valve having a neutral position, two spring-loaded normally closed hydraulic elements installed on the stops, two check valves and a system of pressure and drain hydraulic lines, with the locking mechanism made in the form of a hydraulic cylinder with a spring-loaded piston, and its piston cavity communicated with the drain hydraulic main, and the working cavity of the hydraulic engine is communicated by non-return valves from the hydraulic cylinder of the hydraulic cylinder the locking mechanism and through normally closed hydraulic elements are communicated with the drain main. Fig. / Aa Fi.g.2 K 22 38 From 27: out of pump 2d excavator In the hydraulic system hertz CpLLZ.e Compiled by G. Novikova Editor M. PetrovaTekhred I. VeresKorrektor A V Sharoshi Order 2002/30 Circulation 607Idiene VNII11I State Committee (XX, 1 of the cases of inventions and discovery) 1 13035, Moscow, F - 35. Rauchisk iab., D. 4/5 G | roi.chvodstvenno | o-11o, iigra ((Primary 1 mowing, Uzhgorod, y, i. Design, -}