SU916669A1 - Working member of bucket-wheel trencher - Google Patents

Description

The invention relates to earthmoving machines, and more specifically to trench excavators with a rotary working body.

Known rotary working body with several rows of buckets [ί].

The disadvantage of the working body is that the cutting edges of all forks of necks form a common cutting edge, which creates large dynamic loads on the machine.

Closest to the proposed is the working body of a trench excavator, comprising a rotor, in which one row of buckets with reamers, equipped with teeth with cutting edges, is offset from the other row by half a step [2).

However, the arrangement of the teeth on the bucket is not optimal enough, which leads to a decrease in the reliability of the machine and increases the energy intensity of the digging.

2

The purpose of the invention is to increase reliability and reduce the energy intensity of the digging.

This goal is achieved by the fact that in the working body of a rotary trench excavator, comprising a rotor with two rows of buckets with a shift half a step relative to each other, equipped with teeth, and expanders with teeth, expanders attached to the rotor between the buckets, while their teeth and expanders located in staggered order.

1 shows a rotor with buckets, side view; figure 2 - node Ί in figure 1; on fig.Z and 4 - the sequence of placement of the teeth on the buckets of the right and left rows without expanders (sweep the circumference of the rotor) for one group of the rotor; Fig.5 conventionally buckets of the right and left rows and expanders, which are removed all the teeth of this group.

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Thus, for side spreaders, buckets of the right and left rows, with stepped offset cutting edges, a single common continuous sequence of steps of the chess-chess pattern of teeth arrangement is provided as for a continuous cutting edge.

This ensures, on the one hand, the minimum number of teeth for the development of the face and, as a result, the minimum energy intensity of the development of the soil, and on the other hand, the lowest level of dynamism due to the gradation of the cutting edges, their division into parts.

Thus, when digging a trench, a minimum load jump is created, since a part of the entire edge of the bottom (trench) of the cutting edge (one expander, a bucket of the right or left row, or another expander) and a close number of teeth (one or two) ·

3 of the greatest extent, these advantages are revealed in the development of frozen soils, when, moreover, the probability of spalling at high feed rates (productivity) in the upper part of the bottom of frozen soil blocks is reduced

The application of the proposed working body will also reduce the complexity of the work when re-equipping it by removing or installing only expanders for digging "a trench of a different width.

Claims (1)

Claim The working body of a rotary trench excavator, comprising a rotor, equipped with two rows of buckets with a shift half a step relative to each other, equipped with teeth, and expanders with teeth. This is characterized by the fact that, in order to increase reliability and reduce the digging power intensity, the expanders are fixed on the rotor between ladles, while their teeth and the teeth of the expanders are arranged in a stepwise staggered order. *.