US1430297A - Rope-thrusting shovel - Google Patents

Description

W. FERRIS ANDS. R. W. M. BAGER.

ROPE THRUSTING SHOVEL.

APPLICATION FILED MAR. 24, 1921.

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PatentedSep t. 2 1922.

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VA NORA/Ex W. FERRIS AND S! R. W. M. BAGER.

ROPE THRUSTING SHOVEL.

APVPLICATION FILED MAR. 24. 1921.

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ROPE THRUSTING SHOVEL.

APPLICATION FILED MAR. 24. I92I.

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Patented Sept, 26, 1922.

WALTER FEBItIS, OF MILWAUKEE, AND SVANTE 'W. M. BAGER, OF SOUTH MIIP WAUKEE, WISCONSIN, ASSIGNORS T0 BUCYRUS COMPANY, OF SOUTH MILWAUKEE, WISCONSIN, A. CORPORATION OF WISCONSIN.

ROPE-THRUSTING SHOVEL.

Application filed March 24, 1921. Serial No. 455,303.

To all whom it may concern-.-

Be it known that we, WALTER FERRIS and SVANTE R. W. M. BAGER, citizens of the United States, residing at Milwaukee and South Milwaukee, respectively, both in the county of Milwaukee and State of Wisconsin, have invented a certain new and useful Improvement in Rope-Thrusting Shovels, of which the following is a full, clear, concise, 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 type in which power actuated devices are employed for effecting and controlling the shifting or thrusting action of the dipper handle.

The' 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 may be provided.

Another object is the provision of an improved dipper thrusting device which, though designed to utilize the working tension in the hoisting cable, may be actuated from the power source, without necessarily re uiring a rotation of the hoistin drum.

nother object is the provision 0 an improved dipper thrust gear aotuable from the prime mover and of such character that the dipper handle may be forcibly shifted in either direction without requiring the use of a reversing 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 effecting a shifting of the dipper handle independently of the hoisting action of the hoist gear.

Another object is the provision of an im proveddipper thrusting device that may be operated and controlled from the hoisting and dr line drums, such as are ordinarily provi ed in certain types of power excavators.

any desired position of inclination.

Other objects and advantages will later appear. I Two embodiments of the invention are illustrated in the accompanying drawings, in which:

Figure 1 is a side elevation of a power shovel embodying the novel features of the present lnvention.

Figure 2 is a detail view on a larger scale of a portion of the dipper thrust gear shown in Figure 1. i v i Figure 3 is a bottom plan view of a port1on of.the boom and associated parts.

Figure 4 is a sectional view taken substantially along the line 44 of Figure 2.

Figure 5 is a fragmentary side elevation of a shovel having a thrusting device of somewhat different form.

For convenience. of explanation, the in vention is shown and Will be'described as embodied in a power shovel having a longitud nally shiftable dipper handle, although 1t 1s applicable, with little or no modification, to shovels of that type in which the dlpper 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 power unit (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 commonly employed 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 thegearing 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 The boom carries the usual dipper 20, and dipper handle21, in such manner that the dipper handle is permitted both a swinging and shifting movement.

Tn the shovel illustrated, 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 2d secured to the shipper shaft 25. The shipper shaft is rotatably mounted in fixed bearings 26 secured to the boom and preferably beneath the boom, for a purpose that will later appear. It has been found that, when the shipper shaft 25 is positioned beneath the boom, it is highly desirable that the boom be c'ambered upwardly in order to obtain the most advantageous positioning of the shipper shaft relative to the sheave, 32 and padlock sheave 33. For this purpose, the boom shown is bent at the point 27 adjacent the shipper shaft 25.

lln order that the o'wer unit with which the shovel is provided may be utilized in effecting the shifting or thrusting of the diper handle, the dipper handle is placed uner the control of the auxiliary drum 16 hereinabove referred to. This may be accomplished in various ways, but in the present instance a cable 28 is employed 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 a drum 29 keyed or otherwise tired to the shipper shaft 25. Although the cable might be made to extend directly between these drums, it is preferably passed upwardly above the boom, over a sheave 30 mounted thereon, and thence beneath the boom to the drum 29 in order to avoid interference with the boom. 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 24: and racks 23. Tn 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. Tn order to obtain absolute control over the dipper handle and to force the dipper handle in another direction when the cable 28 is paid out, provision is made for opposing the thrusting effect produced by the tension in this cable.

Tn this instance, the tension in the dipper hoisting cable 31 is utilized for this pur- V/ith this in View, one end of the thrusting acao? made to oppose the tension in cable 28. It-

will be noted that in the arrangement shown, the two portions of the cable 31 adjacent the padlock 33 subtend an angle of considerable magnitude so that the tension in the cable 31, due to the weight of the dipper, is

materially greater than if these two portions were more nearly parallel, and so that the effect of this cable on the dipper handle is consequently reater. This in creased thrusting effect is desirable, especially when the thrusting gear is so designed that the tension in the hoisting cable is'uti lized to force the dipper outwardly. The position of the shipper shaft and drum 29 beneath the boom permits a direct 00111160. tion between the padlock 33 and drum 29 without interfering with the boom.

The cable 31, under the action of the hoisting drum 15, )erforms its usual functions of raising anc lowering the dipper and swingingthe dipper handle 21 about the shipper shaft 25. Tn addition, however, the tension in this cable is made to oppose the tension in the cable 28, so that when the drum 16 is rotated to pay out the cable 28, the dipper handle is forced in a direction opposite to that in which it is moved when the cable 28 is drawn in. Thus it will be seen that the dipper handle is always under the control of the drum 16 and that it may be forced in either direction without requiring rotation of the hoisting drum 15. Furthermore,the dipper may be raised or low ered at will by the hoisting drum 15, in the usual manner.

To illustrate the operation of the shovel described, assume that the dipper is in the lower digging position, such as illustrated in dotted lines in Figure 1, and that the drum 16 is held by its brake against rotation. Upon rotation of the hoisting drum 15in a clockwise direction, the hoisting cable 31 is drawn in, the dipper is raised, and the dipper handle swung about the shipper shaft. As long as the drum 16 is held against rotation the shipper shaft does not rotate and the dipper handle is held against outward shifting movement. If it is desired bank, this is accomplished by releasing the drum 16 to pay out the cable 28. This permits the shipper shaft to rotate under the influence of the tension in the cable 31 and to force the dipper more firmly against the the dipper handle is forced outwardly. If, on the other hand, it is desired to reduce the bite by withdrawing the dipper from the bank, it is only necessary to rotate the drum 16 in a clockwise direction so as to draw in the cable 28. This action effects a rotation of the shipper shaft against the influence of the cable 31 in such direction as to shift the dipper handle inwardly.

When the excavating movement has been completed and the dipper is clear of the bank, the dipper may be readily shifted to an extreme outward position, such as shown in full lines in Figure 1, and such as might be required for dumping-purposes, by merely releasing the drum 16. To return to the dotted line position, it is-only necessary to release the drum 15 so as to pay out the cable 31 and thus lower the dipper, and to rotate the drum 16 in a clockwise direction so as to thrust the dipper handle inwardly to the position shown.

The shovel shown in Figure 5 is -similar, in many respects, to that just described. It includes a boom 17 carrying the usual dipper 20, and the dipper handle 21 in such manner that the dipper handle is permitted botha swinging and shifting movement relative to the boom. The dlpper handle is mounted for lengthwise movement in the pivoted saddle blocks 22", and isprovided with the usual racks 23' for engagement with the gears 24, secured to the shipper shaft 25', rotatably mounted in fixed bearings 26 carried by the boom. A drum 29 on the shipper shaft effects and controls the shifting of the dipper handle in either direction. 11 this instance, however, the hoisting cable 31 which supports the dipper through the padlock sheave 33,, is wrapped about the .drum 29 in such direction that the tension therein tends to rotate the shipper shaft in a direction to shift the dipper handle inwardly; and the thrust controlling cable 28 is so connected with the drum 29' as to thrust the dipper handle outwardly when thiscable is drawn in.

Thus, during the digging operation, the dipper is forced against the bank to increase the bite by drawing in the cable 28' and the .dipper is withdrawn from the bank to decrease the bite, by releasing and paying out the cable 28, and thus permitting the dipper handle to shift inwardl y under the working tension in the cable 31 I Various changes may be made in the embodiments of the invention hereinabove de-,

.scribed,-without departing from or sacri-' fieing any of the advantages of the invention as defined in the following claims.

\Ve claim: 4 n

1. In aower shoveL-the combination of a rotatab e platform, two .independently rotatable drums mounted thereon, a boom carried b said platform, a dipper and dipper han le carried by said boom, a drum mounted beneath said boom and. associated with said dipper handle, a cable connecting one of said first named drums with the drum on said boom, and a dipper hoisting cable connecting the other of said first named drums with the drum on said boom.

2. In a power shovel, the combination of a platform, two independently rotatable drums mounted thereon, a boomcarried by said platform, a dipper and dipper handle carried by said boom, a drum mounted beneath said boom and associated with said dipper'handle, a cable connected with one of-said first named drums for rotating said last named drum in one direction, and a cable connected with the other of said first named drums for controllin the rotation of said last named drum and or rotating said last named drum in anot her direction.

3. In a power shovel, the combination ofa platform, a drum mounted thereon, a boom carried by said platform, a dipper and dipperhandle carriedby said boom for swinging and shifting movements relative thereto, a drum mounted beneath said boom for effecting a shifting movement of said dipper handle, a cable connecting said drums, dipper supporting means associated with said cable at a point between said drums, and means for controlling the rotation of said last named drum.

4. In a power shovel, the combination of .a platform, a drum mounted thereon, a boom carried by said platform, a dipper and dipper handle carried by said boom, 9. cable connected with said drum, connections between said cable and said dipper handle, dipper supporting means associated with said cable at a point between said drum and said connections, said cable passing directly from said dipper supporting means to said connections, and means for controlling the shifting movements of said handle. 5. 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, a sheave on said boom, a cable connected with said drum and passing over said sheave, connections between said cable and said dipper handle for effecting a shifting movement of said dipper handle in one direction, a dipper supporting padlock associated with said cable between said sheave and said connections so that the portions of said cable adj acentsaid padlock subtend a substantial angle, and means for controlling the shifting movement .of said handle and for effecting a shifting of said handle in another direction.

6. In a power shovel, the combination of a boom, a dipper and dipper handle mounted on said boom for swinging and shifting movements, a hoisting drum, hoisting cable, connections between said cable and said dipper handle, a dipper supporting padlock asoeiated with said cable between said drum and said connections, the portions of said cable adjacent said padlock being arranged to subtend a substantial angle, and means for controlling the shifting movement of said dipper handle under the influence of said cable.

7. In a power shovel, the combination of an upwardly cambered boom, a dipper and dipper handle carried by said boom, a shipper shaft mounted beneath said boom'for supporting said dipper handle, a dipper hoist gear associated with saidshipper shaft for shifting said handle in one direction, and means for controlling such shifting movement and for shifting said handle in another direction. i Y

8. In a power shovel, the combination of a boom having a bent portion, a shipper shaft mounted beneath said boom adjacent said bent portion, a dipper and dipper handle, a dipper hoist gear associated with said shipper shaft for shifting said handle in one direction, and means for controlling such shifting movement and for shifting said handle in another direction.

9. In a device of the character described, the combination of a boom, a dipper and dipper handle carried thereby, a dipper hoisting cable associated with said boom and comprising a single part hoist between said boom and dipper, connections between said dipper and dipper handle and said hoisting cable by which saiddipper is raised and lowered and by which said dipper handle is shiftable in "one direction only, independently of whether the dipper is being raised or lowered, and means for controlling such shifting movement and for effecting a shifting movement in another direction.

10. In a device of the character described, the combination of a boom, a dipper having a dipper handle carried by said boom for swinging and shifting movements relative thereto, a hoisting drum, a hoisting cable connected with said drum and said dipper and comprising a single part hoisting line between said boom and dipper, said dipper and hoisting cable being so arranged that the dipper handle is biased toward shift ing movement in one direction by the working tension in said cable independently of the action of said drum, and means for controlling such shifting movement and for effe'cting a shifting movement in another direction.

11. In a device of the character described, the combination of a boom, a dipper and dipper handle carried thereby, means including a drum for effecting and controlling a shiftingmovement of said dipper including a single part hoisting line between said boom and dipper and connected with said drum, and means opposing the working tension in said hoisting gear for effecting and controlling rotation of said drum.

12. A power shovel having a boom, a dipper and dipper handle carried thereby for swinging and shifting movements relative thereto, a hoisting drum, means including a cable operable independently of said drum for shifting said handle outwardly when said cable is drawn in, and means constantly opposing the action of said cable for shifting said handle inwardly when said cable is paid out.

13. A power shovel having an excavating dipper provided with a handle, a hoisting cable for raising and lowering said dipper and by which said handle is at all .times biased toward shifting movement inwardly, and means opposing such inward shifting movement for controlling such movement and for effecting and controlling an outward shifting movement of said handle.

14. In a device of the character described, the combination of a boom, a dipper and dipper handle carried thereby, a dipper hoisting cable, connections between said dipper and dipper handle and said hoisting cable by which said dipper is raised and lowered and by 'which said dipper handle is shiftable inwardly independently of whether the dipper is being raised or lowered, and means for controlling such shifting movement and for shifting said handle outwardly.

15. In a device of the character described,

the combination of a boom, a dipper having a dipper handle carried by said boom for swinging and shifting movements relative thereto, a hoisting drum, a hoisting cable connected with said drum and with said dipper and dipper handle so that said dipper handle is biased toward movement inwardly independently of the action of said drum, and means for controlling such shifting movement and for shifting said handle outwardly.

16. In a device of the character described the combination of a boom, a dipper and dipper handle carried thereby, a dipper hoisting cable associated with said boom and comprising a single part hoist between said boom and dipper, connections between said dipper and cable by which said dipper is raised and lowered, connections between said dipper handle and cable by which said dipper handle is shiftable in one direction only, and means associated with said dipper handie for controlling such shifting movement and forshifting said handle in another direction.

17. In a device of the character described the combination of a boom, a dipper and dipper handle carried thereby, a dipper hoistin cable, connections between said dipper and cable by which said dipper is raised 5 and lowered, connections between said dipper handle and cable by which said dipper handle is shiftable inwardly, and means associated with said dipper handle for con trolling such shifting movement and for shiftingsaid handle outwardly. '10 In wltness whereof, We hereunto subscribe our names this 15th day of March, 1921.

WALTER FERRIS. SVANTE R. W. M, BAGER.

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