Large mining excavator and its cable reel device

Abstract

The invention discloses a large mining excavator and a cable drum device of the large mining excavator. The cable drum device comprises a drum, a support, a motor driving device, a cable arranging mechanism, a top cover and a high-pressure sliding ring device, wherein the drum is used for enabling a cable to be wound and unwound, the drum is provided with a drum shaft, an end portion of the drum shaft is provided with a connecting bolt, the two ends of the drum are fixed to the support, the motor driving device is used for driving the drum to rotate, the cable arranging mechanism is used for enabling the cable to be evenly and orderly wound onto the drum and unwound from the drum, the ratio of the running speed of the cable arranging mechanism, the rotating speed of the drum and the speed of a walking mechanism of the excavator is kept constant, the top cover is arranged on the top of the drum, the high-pressure sling ring device is provided with an integral type box body, an upper bearing and a lower bearing are arranged at the upper portion of the box body and the lower portion of the box body respectively, and the shaft end, in the position of the upper bearing, of the high-pressure sliding ring device is provided with a long circular hole so that the shaft end can be inserted onto the connecting bolt when the high-pressure sliding ring device is installed. According to the large mining excavator and the cable drum device of the large mining excavator, the performance and the safety of the large mining excavator are improved, and use cost is reduced.

Description

technical field [0001] The invention relates to a large mining excavator, in particular to a cable drum device for the large mining excavator and a large mining excavator with the cable drum device. Background technique [0002] With the gradual mining of large-scale open-pit mines, the demand for large-scale mining excavators is gradually increasing. At the same time, users have put forward higher requirements for the performance and human-machine safety of excavators. [0003] In the past, in order to reduce the purchase cost, the user did not have a cable reel device at the tail of the large mining excavator, but made a cable bracket in the shape of a sledge. When the excavator was working on site, the external cables were fixed on the cable bracket. 6kV Or the 10kV external cable is dragged on site, the cable wear is serious and the risk is high. [0004] Considering the above problems, a cable reel device has been installed at the tail of large mining excavators to imp...

AI Technical Summary

Problems solved by technology

The high-voltage slip ring device 7 transmits the high-voltage electricity of the external cable to the excavator 100, and is fixed on the outer surface of the bracket 1 through the threaded backing plate on the protective cover 40. Because the machining accuracy of the outer surface of the bracket 1 is not enough, the high-voltage slip ring The coaxiality between the ring device 7 and the reel 2 is difficult to ensure, and the possibility of damage to the brush holder 36 of the high-voltage slip ring device 7 is high

It can be seen from the above that the prior art high-voltage slip ring device 7 is fixed on the drum shaft 11 by bolts, and is a cantilever beam structure. The brush holder 36 is installed at the farthest end from the drum shaft 11, and the outer carbon brush passes through the slip ring The box is fixed on the outer surface of the reel 2. Since the surface of the side wall plate of the slip ring box is not processed, the coaxiality is difficult to guarantee. When repairing, it is necessary to remove the outermost large metal protective cover 40, and then remove the inner insulating cover , in order to repair the high pressure slip ring

[0011] Through the above analysis, it can be seen that the main problem existing in the tail cable reel device of large mining excavators in the prior art is that the coaxiality between the high-voltage slip ring device 7 and the reel 2 cannot be guaranteed.

Secondly, the one-way reducer 19 of the cable discharge mechanism is not firmly fixed, and the wear between the cable discharge mechanism 4 and the external cable is relatively serious, and the cable cannot be well retracted on the reel 2; in addition, there are few positions where the maintenance window can be set , cannot meet the maintenance requirements, the large top cover 28 needs to be raised as a whole during maintenance, and the workload is large; in addition, the bearing on one side of the reel 2 has no lubricating device, and the possibility of damaging the bearing during use is high, which leads to Reduced safety and increased operating costs of large mining excavators 100

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