US1457301A - Rope-thrusting shovel - Google Patents

Description

June 5, 1923.

W. FERRIS ET AL ROPE THRUSTING SHOVEL 1921 3 Sheets-Sheet 1 Filed March 24 Arm/MK June 5, 1923.

W. FERRIS ET AL ROPE THRUSTING SHOVEL Filed March 24. 1921 3 Sheets-Sheet 3 June 5, 1923.

W. FERRIS ET AL ROPE 'IHRUSTING SHOVEL 3 Sheets-Sheet 5 Filed March 24, 1821 & E

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ATTORNEK WALTER; rmnrs, OF MILWAUKEE, AND SVANTE R. W. M. BAGER, OF SOUTH MIL- was norn-rnnusrrne snovnn.

Application filed March 24, 1921.

South Milwaukee, respectively, both .in the r of which the following is a full, clear, concounty of Milwaukee and State of Wisconsin, haveinvented a certain new and useful Improvement in Rope-Thrusting Shovels,

cise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to power shovels,

' and more particularly, to shovels of that 1 type in which power actuated devices are employed for efiecting and controlling the shifting or thrusting action of the dipper handle.

' lhe general aim of the present invention is to simplify and improve the construction and operation of devices 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 shovel irrespective of the character of prime mover with which .the shovel ma be provided.

Another ob ect is the provision of an improved dipper thrust gear actuable from the main power unit and of such character that shifting of the dipper handle in either direction may be efi'ected and nicely controlled without requiring the use of areversing gear.

Another object is the provision of an improved dipper thrusting device in which a single cable associated with the power unit may be employed for efiecting a shifting of the dipper handle independently of the hoisting action of the hoist gear.

Another object is the provision of an improved dipper thrusting device that may be operated and controlled from the hoisting and dragline drums, such as are ordinarily provided in certain types of power exca vators.

Other objects and advantages will later appear. Y

Several embodiments of the invention are illustrated in the accompanying drawings,

in which Figure 2 is a detail view on a larger scale WISCONSIN, ASSIGNORS "10 BUCYBUS COMPANY, OF MILWAUKEE, WIS- 'lli, A CGRPOTIQN 0F SCQNSIFJ. I

Serial No. 455,302.

efa portion of the dipper thrust gear shown 111 Figure 1.

Figure 3 is a bottom plan view of a por- I tion of the boom and associated parts.

Figure 4 is a sectional view taken substantially along the line 4.4= of Figure 2.

Figure 5 is a fragmentary side elevation of a shovel of somewhatdifierent form, embodying the novel features of the present inventlon.

Figure 6 is a fragmentary side elevation of another form of shovel constructed in accordance with the present invention.

Figure 7 is a fragmentary top view of the I boom and associated parts employed in the shovel of Figure 6.

Figure 8 is a fragmentary side elevation .of another form of shovel constructed in accordance with the present invention.

For convenience of ex lanation, the invention is shown and wil be described as embodied in a power shovel having a longitudinally shiftable dipperhandle, although it is applicable, with little or no modification, to shovels of that type in which the dipper handle is shiftable horizontally.

The shovel selected for illustration includes a wheeled truck 10, provided with a 'turntable 11, supporting a rotatable platform 12 in the usual manner. A hoisting winch 13 is mounted upon the platform 12.

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, such,for instance,as are commonlyemployed as hoisting and dragline drums in some well known types of power excavators. These drums are mounted for independent rotation, each being independently actuated through the gearing 14, and each being controlled by individual clutch and brake mechanisms (not shown) of any standard or approved construction.

A boom 17 is pivotally mounted, as at 17, upon the platform 12. A cable 18 and sheaves 19 are employed in the usual manner for adjustably supporting the boom in any desired position of inclination. The boom carries the usual dipper 20, and dipper handle 21, in such manner that the dipper handle is permited goth a swinging and shifting movement. I

the shovel illustrated in Figure 1,'the dipper handle is mounted for lengthwise movement in the pivoted saddle block 22, and is provided with the usual racks 23 for en agement with the gears 24 secured to the shipper shaft 25 rotatably mounted in fixed hearings 26 on the boom.

In order that the prime mover with which the shovel is provided may he utilized in efieoting and controlling the shifting or thrusting of the dipper handle, the dipper handle is placed under the control of the auxiliary drum 16 hereinahove referred to. This may he accomplished in various ways, but in the present instance a cahle 28 is employed {or this purpose. One end of this cable is wrapped about and anchored upon the drum to, while the other end is wrapped about and secured to a drum 29 keyed or otherwise fined 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 22 and shipper shaft 25 are rotated and the dipper handle is thrust in one direction under the action of the gears 24 and racks 23. in the shovel illustrated in Figure l, the cable 28 is wrapped shout the drum 22 in such direction as to produce an inward thrust on the dipper handle whe'nthe cable is drawn in. In order to obtain absolute control over the dipper handle and to force-the dipper handle in another direction when the cable Qiis paid out, provision is made for opposing the thrusting edect produced by the tension in this cable.

in this instance, the weight of the dipper and dipper handle is-utilized for this purlhe dipper is supported hy a hoistmg cable 3lhaving one end wrapped about and secured to the hoisting drum 15 in the usual manner. This cable passes over a sheave 32, preferably mountedadjacent the upper endof the boom 17, and is connected to the dip or as at 33. Since in the shovel shown in igure 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 dipper handle is normally biased toward outward movement. It will he understood, or course, that when the dipper is in a lower position, such as assumed when digging, so that the dippe handle is inclined downwardly and o twardly, the di per handle tends to shif outwardly un er its own weight and t e weight of the dipper and contents. In rder that this tendency may not be destroyed by the lifting action of the hoisting cable during a diggin stroke, the hoisting cable; is so arranged t at the outward component of its pull, as compared with the vertical component, is materially greater than in ordinary practice. This may be accomplished in various ways, but in the not? . plished by employin handle is shifted outwardly Thus m not shovel shown in this figure this is a'coama boom of a length greater than that or 'narily employed in this instance, the hoom l? is of such length that the distance between the shipper shaft 25 and the outer end of the boom is considerahly greater than the maximum distance hetween the shipper shaft 25 and connection 33. Thus during an entire digging strohe, the direction or? pull or the canto 31 on wardly and outwardly horn the connection 33, so that throughout the stroke the dipper is hissed toward movement against the hank and against the tension in the cahle 22.

The cable 31, under the action oi hoisting drum it, performs the usual reactions or raising and lowering the dipper and swinging the dipper hand e 21 about the shipper shaft 25. lo addition, however, the tension in this cahle, together with the combined weight of the dipper and dipper handie, maintains an outward thrust open the dipper handle in opposition to the tension in cable 28, so that when the drum id i rehe seeen that the dipper handle is 1 y under the control of the lo,

may he-shitted in either direction hoot requiring rotation of the drum to. than more, the dipper may he raised and wered at will by the hoisting drum to in manner.

To illustrate the operation or shovel shown, assume that the dipper is t e lower position, as indicat w dotted lines in Figure l, and that lo is held hy its hrahe against Upon rotation of the hoisting drum clockwise direction, the hoisting is drawn in, the dipper is raised, and dipper handle is swung about the shi nor 25. As long as the drum it is held rotation, the shipper shaft does not rotate and the dipper handle is held outward shifting movement. If it isdesired to obtain a bigger hits by force: the dipper more firmly against the hank, I is accom-' plished by releasing the drum 16 onto pay out the cable 28. This permits the shipper shaft 25 to rotate in a clockwise direction under the weight of the dipper and dipper handle so as to thrust the dipper handle'outs wardly. If, on the other hand, it is desired to reduce the bits by withdra -o the dipper from the book, it is only necessary to rotate the drum 16 in a clockwise direction so as to draw in the cable 258. This action efi'ects a rotation of the shipper shaft 25, against the infiuenw of the weight or 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 Hill:

' ward inclination of that portion of the-cable 31 adjacent the'dipper connection 33 is suflicient to force the dipper handle outwardly to this extreme position when the drum 16 is dil released. .To return to the dotted line position, it is only necessary to release the drum 15 so as to lower the dipper, and to rotate the drum 16 in a clockwise direction so as to shift the dipper 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 for controlling theshifting movement'of the 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 25' upon the boom. The dipper is raised and lowered by means of the hoisting cable 31 connected to the dipper as at 33' in the man ner above described. In this instance, however, the thrust controlling cable 28' is connected at a fixed point 35 along the dipper handle and preferably adjacent the outer end thereof. This cable 28' is preferably passed over a sheave 34 carriedb the boom and secured to a thrust contro ling drum (not shown) in a mannersimilar to that above described. The arrangement is such 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.

similar, in many respects, to that of Figure 5. In this 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 one of the rollers 2?, which is preferably grooved for this purpose, and is connected at the other end to this forward end passed over a sheave 32 mounted preferably adjacent the outer end of the boom 17 and thence around a padlock 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 dippeer and dipper handle are biased toward outward movement, this movement being controlled by the cable 28*. In operation, the dipper is raised and lowered in the usual manner by the hoisting cable 31 and is shifted outwardly by pa ing out the cable 28 and shifted inwardl y by drawing. in the cable 28 The shovel shown in Figure 8 is provided with a thrusting device in which 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 de scribed. The dipper handle 21 rests upon a pair of anti-friction rollers 24:", rotatably 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 cured to the inner end of the dipper handle 21 as at 35". By this arrangement, the tension in the cable 28- tends at all times to force the dipper handle outwardly. The dipper is supported by a hoisting cable 31 connected in t e usual manner to a hoisting drum (not shown). This cable passes over the sheave 32*, preferably mounted adjacent the outer end of the boom, through a padlock sheave 33 secured to the dipper, and thence back to the boom. This cable may be fixed to the boom or may be passed around a sheave 36 fixed to the'boom and then connected with the dipper as at 37. p This cable is preferably connected with the boom at a point well down on the boom and preferably in the vicinity of the shaft 25*. Thus, it will be seen that the tension in that end of the cable 31' between the padlock sheave 33 and the boom tends at all times to shift the dipper handle inwardly.

In operation, the dipper is raised and lowered in the usual manner by drawin in or paying out the cable 31'. T10 shi 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 3]. between the padlock sheave 33 and boom.

Various changes may be made in the em bodiments of the invention above described are tee

fined in the fpllowing claims.

- rotatable drums mounted thereon, a boom' We claim: 1. In a power shovel, the combination of a rotatable platform, two independently carried thereby, a dipper and dipper handle carried by said boom for swinging an shifting movements, a hoistin cable connected at one end with one 0 said drums and at the other end with said dipper for raising and lowering said dipper and for shifting said dipper handle in one direction only, a second cable connected with the other of said drums and associated with said dipper handle for shifting said handle in another direction.

2. In a power shovel, the combination of a platform, a drum mounted thereon, a boom carried thereby, a dipper and dipper handle carried by said boom for swinging and shifting movement, a hoisting cable connected at one end with said drum and at the other end with said dipper for raising and lowering said dipper and for shift 'ing said dipper handle in one direction only, and means including a second cable associated with said dipper handle for shifting said handle in another direction.

3. A power shovel having a boom, a shaft on said boom, a dipper handle supported by said shaft for swinging and shifting movements, a hoisting apparatus connected with said dipper handle independently of said shaft for swin ing said handle and for shifting said han le outwardly independently of whether the dipper is being raised or lowered, and means for controlling such shifting movement and for shifting said handle inwardly.

4:. A power shovel having a boom, a dipper and dipper handle carried by said boom, a dipper hoisting cable, a connection between said cable and dipper so arranged that the resulting hoisting pull of said cable on said dipper, during the entire digging stroke, is directed upwardly and outwardly therefrom so that said handle is biased toward outward shifting movement and means for controlling the position of said dipper handle relative to said boom.

5. A power shovel having a boom, a dipper and dipper handle carried by said boom, a sheave on said boom, a hoist cable passing over said sheave and connected with said dipper, the resulting pull of said cable during the entire digging stroke being directed upwardly and outwardly from the point of connection with said dipper so as to eiiect an outward thrust on said dipper, and means for opposing the outward thrust thus produced.

6. A power shovel having a boom, 9. sheave on said boom, :1 shipper shaft on said d handle inseam.

boom, a dipper and dipper handle su by said shipper shatt, a hoisting cabs passin over said sheave, a' connection between said cable and said dipper, the distance between said shipper shaft and said sheave be ing sufficiently greater than the distance between said connection and the inner end of said dip r handle to maintain said di r iased toward outward shi mg movement, and means for controlling this shifting movement.

7. A power shovel having a boom, a dipper and dipper handle, a support on said boom for supporting said dipper handle for swinging and shifting movements, a hoisting cable connected with said dipper and dipper handle independently of said support and so arranged that said dipper handle is biased toward shifting movement in one direction only, and means for controlling such shifting movement and -tor shifting said dipper handle in another direction.

8. A ower shovel having a boom, a dipper an dipper handle, a support on said boom for supporting said dipper handle for swinging-and shifting movements, a hoistmg cab e connected with said dipper and dipper handle independently of said support and so arranged that said dipper handle is biased toward shifting movement in one direction only, and means including a second line of cable associated with said dipper and dipper handle for shifting said dipper handle in another direction.

9. A power shovel having a boom, a dipper and dipper handle, a support on said boom for pivotally and slidably supportmg said dipper handle, a hoisting cable connected with said dipper and dipper handle independently of said support and so arranged that said dipper handle is biased toward sliding movement outwardly only, and a second line of cable associated with said dipper and dipper handle for sliding said dipper handle inwardly.

10. A power shovel having a boom, a dipper and dipper handle mounted thereon tor swinging and shifting movements and biased toward shiftin movement in one direction only, indepen ently of whether said dipper isbeing raised or lowered, and means including a cable connected at a fixed point on said dipper and dipper handle for controlling such shii'ting movement and for shifting said handle in another direction. 11. A power shovel having a boom, a dipper and dipper handle mounted thereon for swinging and shifting movements, a dipper hoisting cable, connections between said cable and said dipper and dipper handle so arranged that said handle is biased toward outward shifting movement only, independently of whether said dipper is being raised or lowered, and means includin a cable connected at a fixed point on said ipper and dipper handle for controlling such only, and means includin a cable connectshifting movement and for shifting said ed, at a fixed point on said handle for conhandle inwardly. trolling such shifting movement and for 12. A power shovel having a boom, a shifting said handle inwardly. 5 shaft on said boom, a dipper handle su In Witness whereofiwe hereunto subscribe l5 ported by said shaft for swinging and shi tour names this 15th day of March, 1921.

ing movements, a hoistin apparatus oonnected with said dipper andle independ- WALTER FERRIS.

ently of said shaft for swinging said han- SVANTE R. W. M. BAGER. 10 dle and for shifting said handle outwardly

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