SU1638259A1 - Wheel excavator - Google Patents

Abstract

The invention relates to mechanical engineering and may find application in the mining industry. The purpose of the invention is to increase the reliability of productivity while protecting the excavator and its working body from static and dynamic overloads. For this, the rotor wheel on the drive shaft is mounted on the flanges (F) 9 with the possibility of free rotation. Between f 9 on the shaft hard

Description

The invention relates to mechanical engineering, and in particular to rotary excavators, and can be used in the mining industry.

The purpose of the invention is to increase reliability and performance with

- protection of the excavator and its working body against static and dynamic overloads.

FIG. 1 shows a diagram of a rotary excavator) in FIG. 2 - section

.A-A in FIG. 1, in FIG. 3 is a diagram of a control system with a zero and linear pivot drive circuit; in fig. 4 is a section bB in FIG. 2J in FIG. 5 is the same; the embodiment of FIG. 6 is a section BB in FIG. four.

The rotor excavator (Fig. 1) consists of a chassis with a base 1 of the turntable 2 with the mechanism 3 for the top slewing drive 4, a rotor boom 5 with the drive mechanism for the rotor 6, couplings 7 connecting the high-speed shafts of the gearbox with the electric motor 8 and the system control and blocking

electric motors. The assembly of the rotor wheel on the shaft (Fig. 2) comprises flanges 9 mounted on the shaft 10 on the sliding bearings 11 with the possibility of free rotation. The flanges 9 are rigidly connected with. rotary wheel 12 and are the supporting supports of the rotor wheel. Between the flanges 9 are placed two leading drum 13 mounted on the shaft 10 on the slots. On the side of the adjacent ends of the leading drums 13, the board is installed with the Outer ring 14 connected to the inner surface with the friction brake pads 1.5, which

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using the sleeve 16 is connected to the shaft 10. On the outer surface of the driving drum 13 and the yoke 14, an elastic link 17 is installed, made with branches diverging from the middle, the ends of which are fixed to the flanges 9, and the middle is fixed to the holder 14. The elastic link can be made connecting two springs of different directions of winding, while securing the inner ends of the springs is carried out to the outer surface of the yoke 14, and the outer ends of the springs are rigidly attached to their flange 9, On the front part of the driving drum 13 (from the side The ring 9) has an internal annular groove (in the collet) for accommodating a split elastic ring 18 having a wedge-shaped axial notch (see FIG. 4) for connecting a wedge-lever system 19 thereto, which in turn is connected to the cam 20, the shaft 10 and flange 9 each through gear 21. connected to generators 22 of rotation signals, for example, tachogenerators.

The control system (Fig. 3), in addition to the standard electrical circuit, including: CL.2.1; CL.2.2. - switching contacts with fuses} QC 1.1; QC 2.1; CC-3.1; К К 4.1; QC 5.1 - contact command controller contacts; KM 1.1 - contacts of the overcurrent relay} -KR 1, KP 1.1-relay and zero switching contacts on a linear circuit; CL 1 - power line switching relay; KB 1, KB 2, KB 1.4, KB 2.1 — relays and contacts for switching on starting stages. For forward movement, KN 1, KN 2, KN 1.4, KN 2.1 for relays and contacts for switching on starting stages for moving backwards; КУ 1 control relay, contacts К 2.1, К 2.2, К 5.1, К 6.1, К 7.1, К 8.1, К 9.1 - contains contacts КРТГ in the steering drive control system and similar ones in the rotor drive system from RTG relay, which is electrically connected a comparison unit summarizing information from tachogenerators 22.

Rotary excavator works as follows

When the shaft 10 rotates, the driving drums 13 and the sleeve 16, which are connected by the splines to the shaft, rotate. The sleeve 16 is connected by a friction pad brake 15, which with the help of a cam 20 and a spring of the lever system 19 is closed through brake pads 15 onto the sleeve 14. The sleeve 14, rotating with the shaft 10, transmits rotation through the elastic link 17 to the flanges 9 and, , on the rotor wheel 12. When a load on the rotor wheel occurs, an additional deformation of the elastic link 17 (its twisting) occurs, as a result of which its inner diameter decreases, which leads to the capture (compression) of the leading drums. The strongest compression in such a device occurs on the section of the leading drums 13, where the rings 18 are placed. The coils of elastic

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wedge-lever (see

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Coupling 20 at the nominal load, turning the bucket 20 and, consequently, releasing the clip. When the load on the rotor bucket is exceeded, the wedge system 19 rotates the cam 20 and disengages the yoke 14. The coupling of the driving drums 13 and the yoke 14 with the shaft 10 is broken and the shaft Yu rotates in bearings 11 on the rotor wheel 12. When a relative rotation of the shaft Yu occurs, The rotary wheel 12, tachogenerators 22 will show a different voltage (frequency), which in the comparison unit will generate a signal to trigger the RTG relay and, consequently, to disconnect the rotor wheel drive and turntable.

Claims (1)

Invention Formula A rotary excavator, including running and bearing parts with drives, an upper structure with a rotor boom attached to it with a rotary wheel mounted on the shaft and a rotary wheel drive mechanism with a coupling, elastic links and an engine management system, characterized in that tse links 17, which are removed from ring 1F, improve reliability and are less loaded, since the tension (compression) of the coils decreases in proportion to e, where e is the natural logarithm) is the coverage angle, radians; f is the coefficient of friction. The compression of the driving drum 13 is transmitted by the collet chuck to the split elastic ring 18, causing it to deform. The deformation of the ring 18 causes a reduction in the size of the wedge notch (see Fig. 4), which in turn causes movement of the wedge-lever system 19, which is not self-braking. The stiffness of the ring 18 and the stroke of the clutch lever system are chosen so that at nominal load there is no release of the sleeve 14. For this, a gap in connection is created in the lever system, for example, protecting the excavator and its tool from static and dynamic overloads rigidly connected with the leading drums and the holder with its holder, while the holder has an outer ring, a friction brake with a lever drive and an inner sleeve, the rotor wheel being fitted 45 flanges and mounted on the shaft with the possibility of free rotation, while the flanges of the elastic links are attached to the outer ring of the cage, and the outer parts of the leading The 50 drums are made with collets, which are provided with split rings with movable wedge elements for engagement with the lever drive of friction brakes. when protecting the excavator and its working body from static and dynamic overloads, the rotor wheel shaft is made with rigidly connected leading drums and a yoke, while the yoke has an outer ring, a friction brake with a lever drive and an inner sleeve, and the rotor wheel is equipped flanges and mounted on the shaft with the possibility of free rotation, while the flanges of the elastic links are attached to the outer ring of the cage, and the outer parts of the leading The drums are made with collets, which are provided with split rings with movable wedge elements for engagement with the lever drive of the friction brakes. GRTG Fig.Z Ш "/ Ч-ЧГЗ / А KK5.1 5-5 13 H FIG. four FIG. five Editor A.Dolinich . & 6 I Compiled by V. Britarev Tehred M. Didyk Prorector N. Revsk 13 Bb