AU427389B1

AU427389B1 - Continuous bucket wheel excavating machine

Info

Publication number: AU427389B1
Application number: AU26235/71A
Authority: AU
Inventors: Funaki Kisaburo
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 1971-03-08
Filing date: 1971-03-08
Publication date: 1972-09-14
Also published as: AU427389A

Description

2. 2 3 5 71 FIILD OF THE INVENTION

The present invention relates to an excavator, and more particularly to a continuous excavating machine

provided with a head conveyer having excavating buckets

at the top end thereof and a tail conveyer for feeding rubbles in bulk from the head conveyer to desired positions.

BACKGROUND OF THE INVENTION

Nowadays, in a large-scale construction such as open-air mining, canal construction and the like, apparatus which continuously excavates and loads have been attracting

public attention. As one of the typical continuous excavat- ing and loading machines, a bucket wheel excavator has been known in the art. This bucket wheel excavator generally comprises a crawler mount type travelling body, a swivel member swivelably mounted on the travelling body, a head conveyer extending longitudinally supported at one end thereof by the swivel member and provided with a bucket

wheel at the other end thereof, another swivel member

swivelably mounted on said swivel member, and a tail conveyer extending longitudinally supported at one end thereof by the latter swivel member.

In operation of the above conventional type bucket wheel excavator, the head conveyer is turned to

right and left with the bucket wheel being rotated. In this operation, the tail conveyer is also turned together with the head conveyer since the former is mounted on the

latter. Accordingly, it is required to swivel the swivel member carrying the tail conveyer thereon in the opposite

direction at the samc speed to that of the swivel member

carrying the head conveyer in order to direct the feed out

2 3 51 the end of the tail conveyer to a definite direction while

head conveyer is turned. Therefore, the operator is required

to operate the both conveyers at a same time in the Thus, excavating work with the bucket wheel excavator. very the operation of the bucket wheel excavator has been

difficult. of the Further, the bucket wheel excavator has been disadvan- conventional type as described above the machine is tageous in that the whole structure of member for swivelling extremely large since another swivel to said swivel member. the tail conveyer is further mounted

SUMMARY OF THE INVENTION

The primary object of the present invention is

to provide a bucket wheel excavator which can be easily

operated.

Another object of the present invention is to

provide a bucket wheel excavator in which the tail conveyer

can be operated to turn independent of the head conveyer.

A further object of the present invention is to compact provide a bucket wheel excavator of the extremely the size in comparison with the conventional type of the bucket wheel excavator by mounting a swivel means for wheel head conveyer and the tail conveyer to the bucket

excavator body through an extremely compact means.

In- order to accomplish the above stated objects

of the present invention, a couple of swivel means conveyer respectively turning the head conveyer and the tail

independently are provided on the bucket wheel excavator

travelling body.

In addition to the above feature of the present

427389

2 23 5/71 ietvntion, it is also a feature of the present invention

to incorporate the swivel- means for the tail conveyer

within the swivel means for the head conveyer, both of

the swivel means being provided on the bucket wheel excavator travelling body and made to be operated

independently as described above. RIEF DESCRIPTION OF THE DRAWING Fig. 1 is a view of the schematic appearance of

the conventional type bucket wheel excavator, Fig. 2 is a view of the schematic appearance of

the bucket wheel excavator in accordance with the present invention, and Fig. 3 is a sectional view of a preferred embodi-

ment of the swivel device employed in the bucket wheel

excavator in accordance with the present invention. DETAILED DESCRIPTION OF THE INVENTION

Now referring to Fig. 1 showing a conventional

type of the bucket wheel excavator, the reference numeral

1 shows a travelling body, 2 a cylindrical frame, 3 a first swivel device secured on the cylindrical frame 2,

4 a first swivel frame, 5 a head conveyer supported at one end thereof by the swivel frame, 6 a bucket wheel

mounted to the other end of the head conveyer, 7 a second cylindrical frame mounted on the first swivel frame 4, 8 a second swivel device secured to the second cylindrical

frame 7, 9 a second swivel frame mounted on the second swivel device, 10 a tail conveyer supported at one end thereof by the second swivel frame, 11 an operator's cab, and the reference numeral 12 shows a counterweight.

In operation Df the above conventional bucket wheel excavator, the head conveyer 5 is turned to right

-4 427389

2 5 17 6 being rotated. In this and left with the bucket wheel swiveled by driving the carse, the first swivel frame 4 is when first swivel device 3. As apparent from the drawing, the tail conveyer the first swivel frame 4 is swiveled, frame 4 is also swiveled mounted on the first swivel

together therewith. to operate the tail It is required, accordingly, position independent of conveyer 10 to stay at a definite 5 in case of loading the the swivel of the head conveyer in the truck or the like. rubbles fed by the tail conveyer the operator has used In order to meet this requirement, device 8 to turn the tail to drive the second swivel opposite to that of the head conveyer 10 in the direction

conveyer 5 at the same speed. by turning Therefore, in the case of excavating has been required to the head conveyer 5, the operator together with the tail conveyer operate the head conveyer 5 of the conventional type at a time. Thus, the operation

excavator has been very difficult. of the tail conveyer Further, the feed out end which resulted in has become unsettled consequently, addition, the power consumption unstable loading work. In itself has been increased in the bucket wheel excavator of the both conveyers. due to the double operation type of the bucket Moreover, the conventional in that the wheel excavator has been disadvantageous of the se is increased because height of the machine per swivel device 8 for swivel- construction in which a second be mounted with the interven- ing the tail conveyer should 4. tion of the first swivel frame machine in Now the bucket wheel excavating 427 3. 9

21; 235.71 .':"'-r3hnce with the present invention will be described ir, .1ci-il with reference t6 Figs. 2 and 3 illustrating a most preferred embodiment.- In Fig. 2, the portions equi valent to those shown in Fig. 1 are provided with the same numerals. In Fig. 2, the reference numeral 20 shows a swivel device mounted to the travelling body 1 with the intervention

of the cylindrical frame 2. The first swivel frame 4 and the second swivel frame 9 are mounted to the swivel device so as to be operated independently of each other. The relation of the swivel device 20 with the first swivel frame 4 and the second swivel frame 9 will be now described referring to Fig. 3 in detail. Referring to Fig. 3, the swivel device comprises an outer ring 21, an intermediate ring 22, an inner ring 23, and balls 24 and 25 inserted into the space between the outer ring 21 and the intermediate ring 22 and between the intermediate ring 22 and the inner ring 23, respectively. The reference numeral 26 shows a ring gear having outer teeth 27 and inner teeth 28. This ring gear 26 is mounted on the upper face of the intermediate

ring 22 o± the swivel device 20. The ring gear 26 and the intermediate ring 22 are secured to the upper face of the cylindrical frame 2 by bolts 29. The first swivel frame 4 is secured to the upper face of the outer ring 21 of the swivel device 20 by bolts 30. The second swivel frame 9 is secured to the upper face of the inner ring 23 by bolts 3jnthit t zwivcl The reference numeral 32 shows a hydraulic motor mounted on the internal surface of the first swivel frame 4 for swiveling the first swivel frame 4. The reference numeral 33 shows a

4 27 3 89

23 T

pinion directly mounted on the motor shaft of the hydraulic

motor 32. This pinion 33 is meshed with the outer teeth

27 of the ring gear 26. The reference numeral 34 shows of another hydraulic motor mounted on the outer surface

the second swivel frame 9 for swiveling the second'swivel

frame 9. The reference numeral 35 shows a pinion directly motor 34. mounted on the motor shaft of the oil pressure of the This pinion 35 is meshed with the inner teeth 28

ring gear 26.

In the swivel device 20 as described above, when and runs the motor 32 is driven, the pinion 33 is rotated

around the ring gear 26. Thus, the first swivel frame 4

is swiveled. If the motor 34 is not driven at this time, teeth the pinion 35 in meshing engagement with the inner the 28 of the ring gear 26 is not rotated and accordingly

second swivel frame 9 is not swiveled. Therefore, even

when the head conveyer 5 is swiveled, the tail conveyer

can be made not to be swiveled. It will be understood

driving that the second swivel frame 9 can be swiveled by along the motor 34 to make the pinion 35 rotate and run

the inner periphery of the ring gear 26.

As apparent from the above description, in provided accordance with the present invention there is the tail a bucket wheel excavator in which the swivel of independent conveyer can be stopped at a desired position

of the swivel of the head conveyer. Accordingly, the

extremely operation of the bucket wheel excavator can be

simplified. Therefore, the feed out end of the tail the head conveyer is prevented from being unsettled when

conveyer is swiveled to excavate. Further, this results

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1in r-narkable reduction in the power consumption in the xc?: vn~ing machine.

Moreover, in accordance with the preferred embodiment of the present invention, there is provided a Sbucket wheel excavator wherein the swivel device for the tail conveyer is incorporated within.the swivel device for the head conveyer and both of-the swivel devices are able to be operated independently of each other.. Accordingly, it is possible.in accordance with the present invention to make the frame for mounting the swivel device for the tail conveyer thereon serve at the same time as the frame for mounting the swivel device for the head conveyer. Consequently, the height of the bucket wheel excavator in accordance with the present invention can be lowered in comparison with the conventional bucket wheel excavator wherein the swivel.devices for the head conveyer and the tail conveyer are arranged vertically.

Further, it should be understood that the present invention will be applicable to various types of the continuous excavating machine within the scope and spirit of the invention, though it has been described with reference to a particular embodiment thereof with respect to the bucket wheel excavator.

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Claims

2G.; 23 5 /71 The Claims defining the invention are as follows A continuous bucket wheel excavating machine comprising
a travelling body, a first swivel means mounted on said travelling body, a tail conveyor longitudinally extending supported at one end thereof by said first swivel means, a second swivel means mounted on said travelling body, said first and second swivel means baving/vertleai-es of rotation and being in a comon plane, and a head conveyor extending longitudinally supported by said second swivel means and overlying-ee said tail conveyor at one end thereof, and having a bucket wheel at the other end thereof, whereby the swivel of said tail conveyor is arrestable at any desired position independently of, and unaffected by, the swivel of said head conveyor, and spoil excavated by said excavating means is fed onto said tail conveyor by said head conveyor and further fed to a desired position.
A continuous bucket wheel excavating mdachine comprising a travelling body, a swivel means mounted on said travelling body, said swivel means having an intermediate ring fixed to said travelling body, (ii) an inner ring rotatably disposed within said intermediate ring, and (iii) an outer ring rotatably disposed outside said intermediate ring'/~n~~il~z!c hrwt drivin- means for driving said inner ring and outer ring of said swivel means independently, a tail conveyor extending longitudinally supported at one end thereof by said inner ring of said swivel means, and
4 Z 7 3 0"9

21,23 /71 a head conveyor extending longitudinally supported at one end thereof by said cuter ring and overlying of said tail

conveyor-and having at the other end thereof a bucket wheel,

whereby the swivel of said tail conveyor is arrestable at any desired position independently of, and unaffected by, the swivel of said head conveyor, and spoil excavated by said excavating means is fed onto said tail conveyor by said head conveyor and further fed to a desired position. 3o A continuous bucket wheel excavating machine as defined in Claim 2 wherein said driving means comprises a ring gear carried by said intermediate ring, said ring gear having inner teeth and outer teeth, a first driving means carried by a conveyor mountinj frame for said tail conveyor, a first pinion meshed with said.inner teeth of the ring gear and driven by said first driving means, a second driving means carried.by a conveyor mounting frame for said .head conveyor, and a second pinion meshed with said outer teeth of the ring gear and driven by said second driving means. 4o A continuous bucket wheel excavating machine as defined in Claim 2 wherein ball bearing are provided between said intermediate ring and the outer ring and between said intermediate ring and the inner ring.

DATED this 14th day of April, 1972.

HITACHI LIMITED Patent Attorneys for the Applica F.B. RICE CO.