RU1788998C - Working equipment of dragline excavator - Google Patents

Abstract

SUMMARY OF THE INVENTION: The working equipment of a dragline excavator includes a boom mounted on a turntable - Form. A head block is mounted on the boom through which hoisting ropes are connected associated with the hoisting chains. Chains are attached to the pivots of the bucket, which are offset to the front of the bucket with respect to the center of gravity. The bucket is connected to tow ropes that are wound around the winch drum. The drum is made with a section having a thread for winding the unloading rope, which is fixed at one end of this drum section, passed through a pulley block and a guide block, and the second end is connected to the rear wall of the bucket. The polyspast is made with a movable controlled clip, which for this equipped with a power cylinder and mounted in rails. 3 s.p., f-ly, 6 ill.

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FIELD OF THE INVENTION This invention relates to earthmoving machines and can be used on dragline excavators in the mining, coal and construction industries.

The aim of the invention is to increase the reliability of its design.

Figure 1 shows a general view of the working equipment of a dragline excavator; Fig. 2 - place A (general view of the bucket with an elastic); Fig. 3 shows a view along arrow B on aiming units and installation of a guide block of the discharge cable; figure 4 is a section bB (drum t winch) in figure 1; Fig. 5 is a kinematic diagram of a working equipment; figure 6 - the time of unloading the bucket in a given area.

The working equipment of the dragline excavator (see figure 1) includes an arrow 1 mounted on the turntable 2 of the excavator. At the end of the boom, a head unit 3 is installed through which the hoisting ropes 4 are passed. The hoisting ropes 4 are connected to hoist hoisting chains 5 that are pivotally mounted on the trunnions 6 of the bucket 7. Trunnions 6 (see Fig. 2, the center of gravity is indicated + cm). On the walls of the bucket 7 there are eyelets for securing the tow chains that connect the ropes 9 to the bucket 7. The bucket 7 includes a rear wall 10 to which the unloading cable 11 is fastened at one end and is thrown through the bucket arch 12.

For the direction of traction ropes 9 are blocks of aiming 13 (see figure 1, 3, 5), installation VJ

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mounted on a rotary housing (relative to the vertical axis) 14. On the housing 14 there is also installed a guide block 15 for the unloading cable 11, which goes from the guide block 15 to the chain hoist 16, and then to the deflecting block 17 and from it to the drum 18 hoist winch 19. The drum 18 of the hoist winch is made with participation, having a thread for winding the unloading rope 11, the second end of which is fixed in this section (see Fig. 4). The remaining surface of the drum is intended for winding the traction ropes 9. The polyspast 16 is mounted on the column 20 of the excavator and has two clips of blocks. The cage 21 is fixed to the column, and the cage 22 is controllable. For reliable control, the yoke 22 can be installed in the rails 24. On the turntable 2, a hoist hoist 25 with drums on which the hoisting ropes 4 are wound is installed next to the hoist winch 19.

The working equipment of the dragline excavator works as follows.

Using the hoist winch 25, the bucket 7 is lifted by the hoisting ropes 4, while the tow ropes 9 and the unloading rope 11 are wound from the drum 18 of the hoist winch 19. The bucket 7 moves to the bottom and lowers to the ground. In order to fill the bucket 7, the soil is cut with the teeth of the bucket and filled. During this process, the excavator manages the working equipment in the same way as on a serial excavator, working with the control rods of the traction and lifting winches. The bucket 7 filled with soil is torn off by winding the hoisting ropes 4. Using the hoisting ropes 4 and the pull ropes 9, the bucket 7 is moved to the unloading place, after which a control signal is supplied to the power cylinder 23, which moves the movable clip 22 of the chain hoist 16, removing it from clip 21.

The length of the chain hoist is increased while the drawbar 19 is stopped or is operating in the mode of adjusting the position of the bucket over the vehicle. With an increase in the length of the chain hoist 16, the length of the unloading rope 11 between the points of its fastening — the drum 18 and the rear wall 10 of the bucket — decreases.

Due to this, the bucket 7 is lifted by the unloading rope 11 by the rear wall. The bucket rotates around the axis of the pins 6, with which the bucket rests on the hoisting chains 5 of the yoke. The bucket is unloaded at a given point (see Fig.6). After unloading the bucket, the power cylinder 23 returns the yoke 22 to its original position and the chain hoist 16 becomes the same length. The unloading rope is extended and the bucket 7 is horizontal. Subsequent operations are performed as with conventional dragline operating equipment. With the help of hoisting ropes 4, the bucket, when winding 18 traction and unloading ropes from the drum, returns to the bottom. Then, by pulling with pull ropes 9, the bucket is filled. And the cycle repeats. The removal of the bucket discharge point from the turntable of the excavator is determined by the minimum allowable tension of the pull ropes. The kinematic diagram of the proposed working equipment allows practically unloading next to the body.

Claims (2)

The claims 1. The working equipment of the dragline excavator, including the boom, a bucket mounted on it with a rear wall and a hoist, the lifting chains of which are pivotally connected to the bucket pins offset from its center of gravity to the front, aiming units, traction and unloading ropes placed in parallel and a pulling winch, characterized in that, in order to simplify the design and increase reliability, one end of the unloading rope is connected to the drum of the pulling winch, which is made with a section with a thread for winding it, the other end is connected inen with the rear wall of the bucket, while the discharge rope is stored by means of a chain hoist and a guide block. 2. Equipment according to claim 1, the clause being that the chain hoist has a controlled movable clip. 3. Equipment for PP. T and 2, with the exception of the fact that the chain hoist has guides in which a movable cage is installed, equipped with a power cylinder. 4. The equipment according to claim 1, which means that the guide unit and the aiming units have a common housing. Fig .d Editor S. Kulakova Compiled by A. Tokarev Tehred M. Morgenthal Proofreader A. Motyl