SU597624A1 - Stump grab - Google Patents

Description

one

FIELD OF THE INVENTION The invention relates to the field of lifting and transport equipment, and specifically to load gripping devices for timber, which are hung on the loader boom.

Known grabs for stumps, containing the frame with the suspension and chelkyuti, pivotally connected to the frame and equipped with a drive from the hydraulic cylinder l.

However, these grabs are not intended to provide ballast clearing of stumps.

Also known is a grapple for stumps, comprising a frame with a suspension, jaws pivotally connected to the frame, and a jaw closing actuator 2.

However, cleaning of stumps from baplast in this grapple is not (quite effective.

To ensure that the stumps are cleared of ballast, spring-loaded knives are attached to the inner surface of the jaws.

FIG. 1 shows the described front grapple; in fig. 2 - the same, side view; in fig. 3 shows the node I in FIG. 1. The grab contains a frame I, inside which

A VIA directional vibrator is mounted with a drive from a motor 2. In the lugs 3 of the frame 1 on the axes 4 there are jaws 5, which are driven from the power cylinder 6. On the working surface of the jaws S are mounted movable cutting knives 7 with slot 8 pivotally fixed on axle x 4 and entering the guide slots 9 on

of the jaw teeth 5. The cutting knife 7 in the middle part can be spring-loaded with a spring 10 placed in a guide glass 11 mounted into the body of the jaw S. The knife 7

It is connected to the spring 10 by means of the pallet 12 and the lugs of the guide stem 13, the rear end of which is threaded. Preloading of the spring U is made with the nut 14.

The stiffness of the Hughes spring is given in such a way that it allows the knife 7 to cut the root mass of the soil and ensure that it sinks into the jaw 5 when it meets the wood of the side surface of the mon or its large root.

, Both jaws 5 can be pivotally connected by an equalizing pull 15, the pin of the end of which is fixed on the left jaw above its axis of rotation, and the second one on the scion, below the angle of rotation. The grapple is mounted to the loader arm (not shown). with the help of (n weights 16.

The grapple works as follows. With the help of the loader of the loader with the jaws S opened, the grab is directed at the uprooted stump and with the help of the ram 6, the jaws 5 are pulled down, while picking up the mon with the knives 7; its solidity is destroyed. The simultaneity (synchronism) of the rotation of both jaws 6 is provided by equalizing cable 15.

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When knives 7 meet with a side surface of a mon or a large root, the total resistance to cutting of which is higher. the bones of the springs 10, the latter are compressed, and the knives are sunk into the inside of the jaws 5. Then the vibrator is put into operation and under the action of the vibration pulses directed horizontally, the ground cut into pieces is slatted and cut

derny layer. Some weakening of the clamping of the mon between the frame 1 and the jaws 5 as it is cleaned contributes to the intensification of this process. The stub cleared of soil and turf

the loader boom is transferred and loaded into the transport container (loader body, trailer).

The use of the described greffer on a loader of uprooted stumps provides high-quality cleaning of them from the ground and a high productivity in this operation.

Claims (2)

1. Author's certificate No. 492454 cl. In 66 with 1 / ZO, 1974 2. Author's certificate hfc 4О7819 cl. R 6b from 3/16, 1971 PU2. 2