RU1808919C - Grab bucket - Google Patents

Abstract

Usage: in mining and construction during the development of strong and frozen soils. SUMMARY OF THE INVENTION: a grab includes a suspension frame connected to it by jaw turning cylinders and a central bump with a rotation drive. The grab is provided with a plate mounted on the frame by means of vertical rails with elastic elements, pivotally connected to the jaws. A central screw drive with a rotation drive is fixed to the plate. The invention reduces soil resistance to digging. 2 ill.

Description

(/)

WITH

The invention relates to earthmoving equipment and is intended for bucket digging of predominantly frozen soil.

An object of the invention is to reduce soil digging resistance.

The device is shown in FIG. 1 and 2, which depict a longitudinal view of the grab with its bucket jaws closed and open, respectively.

The device includes a supporting frame 1 suspended from the base machine using a hydraulic cylinder 2, which is also a pressure mechanism on the developed soil. An inner plate 5 is suspended from the frame 1 using vertical pin guides 3 and elastic elements 4, on which a rotation mechanism is fixed in the form of an engine and a reducer 6 with a central screw screw 7 inserted into it and placed in a bucket with its jaws 8 closed. Moreover, each

of the jaws equipped with cutting elements, 8 has two hinge points of its suspension: one, relative to the supporting frame 1, by means of a hydraulic cylinder 9, and the other, on brackets 10 fastened to the plate 5.

The work of the proposed grab can be carried out in two ways: at first it is possible to act only with a screw bail with the jaws fully open, not touching the bottomhole soil, and then, after pure loosening of the soil, grab it by closing the jaws. However, such a sequence of operations will not bring the proposed object any super-total advantages, therefore, the principle of joint compatibility is preferable. the new, but phased work of both working bodies - a barn and jaws. In this case, with the aid of the hydraulic cylinder 2, the entire grab is lowered down to take the soil.

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At the same time, its jaws 8, after the previous discharge, will be in a dispelled position corresponding to FIG. . When approaching the slaughter, they should be partially reduced, in order to reduce the horizontal distance 5 from the bore 7 to the end jaw asthma 8. The indicated initial jaw divorce 8 relative to the bore 7 is used in practice, the outcome is selected from the category of developed soil before all the connection, and also the elasticity of the springs 4. With the proper selection of the indicated parameters, the screw borehole is buried in the ground under the action of 0 weight of the working body, an additional 15 pores from the side of the hydraulic cylinder 2 and its: rotation from the drive 6 begins in CBOI x action x ahead of the frame and jaw and at the same time compress the springs. 4, we bring the cutting parts of the jaws closer to the surface of the developed soil, up to their contact with this soil and deepening into it. Depth into the ground, the screw will tighten the cutting elements of the jaws 8 there, and the impact on 25 pounds of the cutting elements of the jaws is constantly accompanied by their dynamics from the springs 4. This deepening will continue until the springs 4 work, and they will work when force 30

their elasticity will exceed all the forces of resistance to the introduction of elements 7-8 into the soil .. Then this system, together with the soil clamped by them, will shoot up. Moreover, at the time of such firing, i.e. instantly the 35th separation of the soil from its mass, the jaws 8 will impulsively rotate relative to the hinges of their connection with the hydraulic cylinders 9 in the direction of closing the jaws, which will contribute to throwing 40 of the torn soil into the open bucket cavity with the simultaneous destruction of this soil. After shooting up the bored hole 7 together with the cutting elements of the jaws 8 with the hydro-45 cylinders 9, the jaw spread is increased and again, due to the pressure from the hydraulic cylinders 2 and rotation from the drive 6, the screw 7 is again buried in the ground at the same place, but already to a great depth, which is 50

Claims (1)

entails again the subsequent introduction of the cutting edges of the jaws into the dense soil. Then, after compressing the springs 4 to their critical length, the borehole together with the cutting elements of the jaws will again shoot up and again drive a new portion of soil into the bucket cavity. After this, the jaw should be further opened and buried again in the ground. And such movable movements of the jaws must be continued until they are fully opened, which ultimately will ensure the accumulation in the bucket cavity of the required ccC of soil, which will already be a reverse effect on the hydraulic cylinders 9 in a closed grab, after which the entire grab with the hydraulic cylinders 2 is lifted from the bottom for unloading / which is performed by opening the jaws 8. Thus, the operation of the proposed object is based on spontaneous and automatic separation of the soil that is strung on the screw and clamped from above by the jaws and, in turn, due to the signal for spontaneous separation of a portion of the soil, it is already possible to automatically force the mechanism for further portioned opening of the jaws. The spring dynamics of the jaws themselves reduces not only the resistance of the soil to the introduction of the cutting edges of the jaws, but also intensifies the subsequent process of impulse casting of soil into the bucket cavity, since when the springs are unclenched, the peripheral parts of the jaws receive the highest speeds of their movement directed towards the bore. SUMMARY OF THE INVENTION A grapple including a suspension frame pivotally mounted and connected to the frame by jaw turning cylinders and having a rotary drive central screw bump is distinguished by the fact that, in order to reduce the resistance to soil digging, it is provided with a frame mounted on the frame vertical guides with elastic elements by a plate pivotally connected to the jaws, while the central screw bore with rotation drive is fixed to the plate.