USRE16400E

USRE16400E - Rope-thrusting shovel

Info

Publication number: USRE16400E
Authority: US
Publication date: 1926-08-10

Description

ATTORNEY.

v 4 V L 3 w 1 4. a AV E; 6 8 V .m W NW R n M m Aug- "10 1926.-

w. FERRIS ErAL ROPE 'rmws'rms sHovEL Original Filed March 24 1921 Aug. 10,1926.

. W. FERRIS ET AL ROPE THRLLSTING SHOVEL Original Filed March 24, 1921 3 Sheets-Shout 2" I N VEN TORS a a m m K m m n ma 5 M W m mv 5 n m m T A Rama Aug. 10, 1926.

UNITED STATES PATENT OFFICE.

WALTER 1mm, 01 MILWAUEE, AND BVANTE B. W. 1. 63B, SOUTH MILWAU- m WISCONSIN, ASSIGNORS I O BUGYBUS COMPANY, 01' SOUTH KILWAUKEE, VHS- OOHSIH, A. COB POBATIOK OF WISCONSIN;

' aorn-rnnus'rme snovan.

' lb. 1,451,ao1, am June 5, was, Serial No. 455,302, mailman, 1021'. Application mr reissue fled October a, '19. Serial no. 741,173.

This invention relates to; wer shovels,. and more particularly, to s ovels of thatctype in which wer actuated devices are 4 employed for e acting and controllin the shifting or thrusting action of the dipper handle. 1

The general aim' of the present invention isto simplify and improve the construction and operation of deviees.of this character.

A more specific object is the provision of a. simple'and improved form of dipper thrusting device, capable of advantageous use in any type of power shove-l irrespective of thecharacte'r of prime mover with which the shovel may be provided.

Another object is the provision of an improved dipper thrust gear actuable from the main power unit and of such character that shifting ofthedipper handle in either direction may beefl'ected and nicely controlled without requiring the use of a reversing gear. t d Another 1 object is the provision of an improved dipper thrusting device inwhich a single cable associated with the power unit may be employled for efiectin a shifting of the dipper andle indepen ently of the hoisting action of the hoist gear.

Another object is the provision of an improved dipper thrustin device that may be operated and control and dr line drums, such as are ordinarily provide in certain types of power excavators.

as Other objects and advantages will ,later appear.

Several embodiments of the invention are illustrated in the accompanying drawings, inwhichz" 40, Figure 1 is a side elevation of a power shovel embodying the novel features of the present invention, 7 o Figure 2 is a detail view on a larger scale of a rtion of the dipper thrust gear I shown in igure 1. Figure 8 is a bottom plan view of a portidn of'the boom and associated parts.

'Fi re d is a sectional view taken substantially along the line 4-4 of Figure 2. -Fi re 5 is a iragmenta side elevation of a 50ml of somewhat di erent form, em-

from the hoisting rotation, each'being independentl throu h the b 'troll bodying the novel features of the present invention.

, of another form of shovel constructed in accordance with the present invention. For convenience of explanation, the inventionis shown and will be described as embodied in a power shovel having a longitudinally shiftable dipper handle, although it is applicable, with little orno modification, to shovels of that ty 0 in which the dipper handle is shiftable horizontally.

The shovel selected for illustration in cludes a wheeled truck.10, provided with a turntable 11, supporting a rotatable platform. 12 in the usual manner. A hoistin winch 13 is mounted upon the platform -1 The hoisting winch is driven from any suitable prime mover (not shown) through an appropriate gearing, a portion of which is shown at 14. The hoisting winch includes a main drum 15 and an auxiliary drum 16,

ployed as hoisting and dragline drums in some well known types of power excavators.

These drums are mounted for independent actuated gearin 14, and each ein conbyindividual clutch and rake mechanisms (not shown) of any standard or approved construction.

A boom' 17 is pivotally mounted, as at 17', upon the plat orni 12. A cable 18 and sheaves 19 are. employed in the usual manner for adjustablysupporting the boom in any desired position of inclination. The

'boom carries the usual dipper 20, and .dip-

per handle 21,. in such; manner that the dipper handle is permitted both a swing.-

ing and shifting movement. In the shovel 4 illustrated in Figure 1, the dipper handle is mounted for lengthwise movement in the pivoted saddle blocks 22, 'and is provided with the usual racks 23 for engagement with the gears 24 secured to the shipper shaft 25 the boom.

In order that the prime mover with WhlCh the shovel is provided may be utilized in efthrusting of the dipper handle, the dipper footing and controlling the shifting or handle is placed under the control of the auxiliary drum 16 hereinabove referred to. This maybe accomplished in various ways, but in the present instance a cable 28 is em ployed for this purpose. One end of this cable is wrapped about and anchored upon the drum 16, while the other end is wrapped about and secured to the drum 29 keyed or otherwise fixed-to the shipper shaft 25. The arrangement is such that, when this cable is drawn in under the action of the drum 16, the drum 29 and shipper shaft 25 are rotated and the dipper handle is thrust in one direction under the action of the gears 21 and racks 23.' In'the shovel illustrated in Figure 1, the cable 28 is wrapped about the drum 29- in such direction as to produce an inward thrust on the dipper handle when the cable is drawn in. In'order to obtain absolute control over the dipper handle and to force the dipper handle in another direc-.

tion when the cable 28 is paid ,out, provision is made for opposing the thrusting effect produced by the tension in this cable.

In this instance, the weight of the dipper and dipper handle is utilized for this pur pose. The dipper is supported by a hoisting cable 31 having one end wrapped about 7 and secured to the hoisting drum 15 in the usual manner. This cable passes over a sheave 32,- preferably mounted adjacent the upper end of the boom 17, and is connected to the dipper as at 33. Since in the shovel shown in Figure 1, the cable 28 is arranged to produce an'inward thrust on the'dipper handle, the hoisting cable 31 and dipper and dipper handle are so arranged-that the dip-- per handle is normally biased toward out-- ward movement. It will be understood, of oourse,thatwhen the dipper is in a lower position, such as assumed when digging, so

that the dipper handle is inclined down wardly and outwardly the dipper handle. tends to shiftoutwardly under its own weight and the weight'of the dipper and contents.- Inv order that this tendency may not bedestroyed by the lifting action of the hoisting cable during a digging stroke, the

hoisting cable is so arranged that the outward component 'of its pull,'a.s comparedwith the vertical component, is materially gmater than inordinary practice; This may be accomplished in various ways, but in the shovel shown in this figure this is accomplished by employing a boom of a length greater than that ordinarily employed. In this instance, the boom 17 is of such length that the distance between the shipper shaft 25 and the outer end of the boom is considrequiring rotation of the drum 15.

erably greater than the maximum distance between the shipper shaft 25' and connection 33.. Thus during an entire digging stroke, the dipper is biased toward movement against the bank and againstthe tension in the cable 28.

The cable 31, under the action of the hoisting drum 15, performs the usuaLfunctions of raising and lowering the dipper and swinging the dipper handle 21 about the shipper shaft 25. In addition, however, the tension in this cable, togetherwith the combined weight of the dipper and dipper handle, maintains an outward thrust upon the dipper handle in opposition to the tension in cable 28',"so that when thefdrum 16 is released and the cable 28 paid out the dipper handle is shifted outwardly, Thus it will be seen that the dipper handle is always I under the control of the drum. 16, and that it may be shifted in either direction without Furthermore, the dipper may be raised and lowered at will by the hoisting drum 15 inthe usual manner. a

To illustrate the operation of the shovel shown, assume that the dipper is in the lower digging position, as indicated by dotted lines in Figure 1, and that the drum 16 is. held by its brake against rotation.

Upon rotation of the hoisting drum 15 in a clockwise direction, the hoisting cable is drawn in', the dipper is raised, and'the dipper handle is swung about the shipper shaft 25. As long as the drum16 is held against rotation, the shipper shaft does not rotate and the dipper handle is held against outwardshifting movement. If it is desired to obtain a bigger bite by forcing the dipper more firmly against the bank,- this is accomplished by releasing the drum 16 so as to pay'out the cable 28. This permits the shipper shaft to rotate in a clockwise direction under the weight of the dipper and dipper handle so as to thrust the dipper handle outwardly. If, on the other hand, it is desired to reduce the bite 'bywithdrawing the dipper from the bank, it is only necessary torotate the drum 1 6 in a clockwise direction'soas to drawin the cable 28. This action efiectsa rotation of the shipper shaft 25, against the influence ofthe weight of the dipper and dipper handle, in such direction as to thrust the dipper handle inwardly.

When the: excavating movement has been completed and the dipper has been raised clear of the bank,.the dipper may be readily shifted to its extreme outward position, such as might be required for dumping purposes,

by merely releasing the drum 16. The inward inclination of that portion of the cable eition, it is only necessary to release the drum so as to lower the dipper, and to rotate the drum 16 in a clockwise direction so as to shift thedipper handle inwardly to the position shown.

' .The shovel shown in Figure ,5 is similar, in many respects, to that just described, except that no shipper shaft drum is required dipper handle. This shovel includes a boom 17 similar to the boom above described and carrying a dipper 20' and dipper handle 21' for swinging and shifting movements. The dipper handle is slidably mounted in a saddle block 22, pivotally supported as at. upon the boom.; The dipper is raisedrand lowered by means of theihoisting cable 31" conner above described. In this instance, however, the thrust controlling cable 28' is connected at a fixed point along the dipper thereof. This cable 28' is preferably passed over a sheave 34 carried by the boom and secured to a thrust controlling drum '(not 4 shown) in a manner similar to that above described. The arrangement is such that the dipper and dipper handle cooperate with the hoisting cable 31' in such manner as to be biased toward outward shifting movement and this movement is resist'ed by the tension in cable 28'. The operation of this shovel is similar to that above described in that the dipper may beraised and lowered in the usual manner under the action of the hoisting cable'31. An outward thrust is produced by paying out the cable 28 and an inward thrust by drawing in this cable.

The shovel shown in Figures 6 and 7- is 5. Inthis instance, however, the dipper handle 21 is slidably supported by a pair of anti-friction rollers 24", mounted upon a shaft 25. The dipper handle is retained in position against the rollers 24 by the usual pivoted saddle block-22. A thrust controlling cable 28', connected at one end to a thrust controlling drum (not shown), passes over oneof the rollers-24, which is preferably grooved for this purpose, and is con-- nected at the other end to the forward end of the dipper handle 21 as at 35. The dipper is supported by a hoisting cable 31, which is connected to a hoisting drum (not shown), in the usual manner, and which is passed over a sheave 32 mounted preferably adjacent the outer end of the boom 17' and thence around ajpadlock sheave 33 and finally returned and anchored to the boom as at 36. As in the shovels above described, the arrangement of the hoisting cable, dipper and dipper handle is such that the dipper and dipper handle are biased toward outward movement, this movement being confor controlling the shifting movement of the nected to the dipper as at 33' in the man-- handle and preferably adjacent the outer end' similar, in many-respects, to that of Figure dipper is raised and lowered in the usual manner by the hoisting cable 31 and is with a thrusting device inwhich the operation is the reversal of those hereinabove described. This shovel includes a boom 17", which is preferably somewhat shorter than the boom employed in the shovels above described. The dipper handle 21 rests upon a pair of anti-friction rollers 24", rota't-ably mounted on a shaft 25, the dipper handle being retained in engagement with the rollers by the usual pivoted saddle block 22". In this instance, the thrust controlling cable 28", which is connected at one end in the usual manner to a thrust controlling drum (not shown), is passed around a sheave 34", preferably mounted on the shaft 25 and freely rotatable with respect to the rollers 24". The other end of theicable 28" is secured to the inner end of the dipperjhandle 21 as at 35". By this arrangement, the tension in the cable 28" tends at all times to force the dipper handle outwardly. The

dipperis supported by a hoisting cable 31 drum (not shown). This cable passes over the outer end of the boom, through a padlock sheave 33 secured to the dipper, and thence back to theboom. This cable mav'be fixed to* the boom or may be passed around a sheave 36 fixed to the boom and then con-- nected with the dipper as at 37.

point well down on the boom and preferabl in the vicinity of the shaft Thus. it

This cable w s preferably connected with the boom ata 'will be-seen that the tension-in that end of the cable 31 between the padlock sheave 33" and the'hoom tends at all times toshift the dipper handle inwardly.

In operation, the dipper is raised and lowered in the usual manner by drawing in or paying out thecable 31". To shift. the dipper handle outwardly, however, the cable 28 is drawn in and to shift the dipper handle inwardly the cable 28 is paid out, thus permitting the dipper handle to move inwardly under the influence of the tension in the end portion of the cable 31" between the padlock sheave 33 andboom.

Various changes may be made in the embodiments of the invention above described without departing from. or sacrificing any of the advantages of the invention as defined in the following claims:

We claim: V I

1. A power shovel havi a boom; a sheave adjacent the outer en of said boom; a shaft permanently positioned on said boom intermediate its ends; a dipper handle,

5 trolled by the cable 28'. In operation, the ported by said shaft for swinging and shift- I shifting said handle inwardly.

ing movements; a hoisting cable passing over said sheave for swinging said handle,

and hoisting cable being so disposed that the net'effect of the pull of the hoisting cable lengthwise on the dipper handle and the component (lengthwise of'the dipper handle) of the pull of gravityon the dipper, contents and handle, shall, in all positions of the handle, tend to shift, andconstitute the sole means for shifting, the handle outwarch 1y, independently of whether the dipper is 'bcingraised or lowered; and means for controlling such sh'ifting movement and for 2. A power shovel having: a boom; a

- sheave adjacent the outer end of said boom;

a dipper and dipper handle; a fixed support on said boom intermediate itsends, for supporting said dipper handle for swinginq and shifting movements; a hoisting cable passing over said sheave and associated with said dipper and dipper handle, its entire association with said handle being independent of 'said support; said boom, support,

dipper, dipper handle and hoisting cable being so disposed that the net effect of the pull of the hoisting cable lengthwise on the dipper handle and the component (lengthwise of the dipper handle) of the pull of gravity on the dipper, contents and handle, shall, in all positions of the handle, tend to shift, and constitute the sole means for shifting, the handle in one predetermined direction; and means for controlling said shifting movement and for shifting said dipper handle in the other direction. a 3. A power shovel having: a boom; a sheave adjacent the outer end of said boom; a dipper and dipper handle; a fixed support on said boom intermediate its ends, for pivotall and slidably supporting 'said dipper han 1e; a,hoisting cable, passing over said' sheave and associated with said dipper and dipper handle, its entire association with said handle being independent of said sup ort; said boom, sup ort, dipper, dipper iiandle and hoisting ca le being so disposed that the net effect of the pull of the hoisting cable lengthwise on the dipper handle and the component (lengthwise of the handle) of the pull-of gravity on the dipper, contents and handle, shall, in all positions of the handle, tend to shift, and constitute the sole handle and cable being disposed in suchmanner that the hot effect of the pull of the hoisting cable lengthwise on the dipper handle and the component (lengthwise of the dipper handle) of the pull of gravity on the dipper, contents and handle," shall, in all positions of the handle, tend to'shift, and constitute the'sole means for shifting, the handle outwardly; a separately operated cable; and a separate association between said last reamed cable and said dipper and dipper hanle,

5. A power shovel ,having: a boom; 9. sheave adjacent the outer end of said boom; a dipper and dipper'handle mounted at a fixed point on said boom intermediate its ends, for swinging and shifting movements;

a hoisting cable passing oveisaid sheave and having only fixed-pointassociation with said dipper and dipper handle; said boom, dipper, dipper handle and cable being disposed in such manner that the not effect of,

the pulls of the hoisting rope and of gravity on the dipper, contents and handle, maintains a thrust in one direction on said dipper handle, and constitutes the sole means for maintainin such thrust thereon, independently of fire position of said dipper handle; and a second line of cable, associated with said dipper and dipper handle at only one point thereon, for controlling such thrusting movement and for handle in the other direction.

I In witness whereof, I hereunto subscribe myname this 2nd day of October, 1924.

WALTER EERRIS.

In witness whereof, hereunto subscribe my name this 24th day of September, 1924.

, SVANTE R. w. M. BAGER.

whereby the handle is shifted inwardly.

shifting said v