US1393362A - Power-shovel - Google Patents

Description

H. H. HARRIS.

POWER SHOVEL.

APPLICATION FILED 1111111.15, 1919.

Patented 10011;., M9 WZL 4 SHEETS-SHEET l..

H. H. HARRIS POWERl SHOVEL.

APPLICATION man MAR. 15, 1919.

H. H. HARRIS.

Patented 0631,. H9 11921-m 4- SHEETS-SHEET 3.

HUTJLT@ H. Mmmm, @E TIOEtATN, OHIO, ASSIGNOH T0 THE THEW @E LORATN, OHIO, A COBPORATIIN UF @mtl SHVEL UQMJFAATW,

rownnfanonnn pecicaticn of Letters Patent.

Patented wet. Til, T924..

Application fled March 15, i919. Aerial Ito. Watan.

To all 'whom it may concern.'

Be it known that I, HOLLIS H. Hannie, a citizen of the United States, residln at Lorain, in the county of Lorain and btate of hio, have invented a certain new and useful Improvement in Power-bhovels, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to steam shovels and the like wherein a dipper stick is employed which is caused to travel bodily. to crowd the dipper into the earth, there being mechanism for raisinr and withdrawing the dipper stick in accordance. with the customary operation of such devices. The present invention is concerned particularly with such an arrangement of the mechanism of such a device that it may be particularly compact vertically and still be eiiicient and rapid in operation, whereby the device may be conveniently used in tunnels, mines an'd similar places where the overhead room is very limited. The novel characteristics of the present invention are hereinafter more fully explained in connection withthe accompanying drawings and the essential characteristics are summarized in the claims.

Tn the drawings, Figure 1 is a side elevation of a steam shovel constructed in accordance with the present invention; llflg. 2 1s a side elevation com rising a similar view, some of the parts being broken away to illustrate in section parts of the mechanism not shown in Fig. 1; lFig. 3 is a plan of the steam shovel; Fig. 4 is a substantial axial section through a gearing mechanism foradvancing and withdrawing the dipper carrier; ig. 5 is a fragmentary sectional plan of the dipper slide taken on the line 5--5 of Fig. 2; Fig. 6 is a vertical section on the line 6-6 0f Fig. 1; Fig. 7 is a vertical section taken substantially on a plane indicated by the line 7-7 of Fig. 1.

Describing the invention, as illustrated in the drawings, by the use of reference characters, 1 indicates a truck frame shown as supported on suitable wheels 2. On the truck frame is revolubly supported a platform 3 to which is pivoted at 4 end brackets 5 of a boom comprising side channel members 6 secured to the free end of which are rearwardly extending brackets 8 attached to vertical struts 9. At the meeting points on a shaft 45. This shaft in of the braces 8 and struts 9 are pivotall attached links 10 pivoted at 11 to upright links 12 and in turn pivoted to bearing meinbers 14. Extending rearwardly from the pivot members 11 are tie rods 15 provided with turn buckles 16 and attached to brackets 17 mounted on the platform 3 at the rear end thereof. A counter weight box 18 ia shown as mounted on the rear end of the platform and extending forwardly from the upper end of the box is shown a roof 19 provided with vertical supports 20 at the forward end thereof.

At 22 is indicated a dipper suitably secured to the lower end of a dipper stick 23, pivotall attached at 24 to a carrier 25, so mounte as to slide in ways formed by channel members 26 facing inwardly from and attached to the channels-6 and uprights 9.

Mounted on the platform 3 is a suitable motor. 30, on the armature shaft of which is a pinion 31 meshing with a gear 32 rigid on a shaft 33. On the shaft 33 is a gear 34 meshing with a gear 35, in turn driving a gear 36. The shafts for this chain of c gears may be provided with suitable bearings in the bearing bracket 14. The gear 36 is shown mounted on'a shaft 40 supported at the end opposite the gear 36 on a bearing mounted on a bracket 41 and carrying a gear mechanism to be presently described which includes a sprocket 42 over which runs a sprocket chain 43 leading over a sprocket 44 y turn rigidly carries a sprocket 4 6 engaging and driving a chain 48 anchored at one end directly to the carriage 25 and running over idler guide sheaves 49 and 50 and anchored at 51 to a projection shown as rising from the carriage 25. The sheave 50 is shown as carried in a bifurcated member 53 attached to cross frame members 54 between the side members 6 of the boom. Thus as the sprocket 42 is rotated in opposite directions, the carriage 25 is caused to move forwardly and rearwardly through the chain 43,'sprocket 44 and chain 48. Assuming that the motor 30 runs in one direction only, it becomes necessary to provide a reversing driving gearing connecting the shaft 40 with the sprocket gear 42. A suitable construction for such gearing is illustrated in Fig. 4, in which a pinion gear is shown as rigidly keyed to the shaft 40 and meshes with planetary pinyat ions 61 carried on studs 62 rigidly aixed in a brake drum member 63 rotatable about and mounted on .the shaft 40. An internal gear 65 surrounds and meshes with the lanets 61 and is rigidly attached to a spiderike member 66 in turn secured by bolts 67 to the sprocket 42 and having a bearing on the shaft 40. It will be seen that with the shaft 40 running continuously in a counter-clockwise direction, the planets 61 will be caused to travel idly carrying the brake drum member 63 with them. Upon the stopping of the brake drum, however, by application of a suitable brake band, not shown, the studs 62 and consequently the axes of the planets 61 become stationary and the gear 65. is thereupon caused to rotate carrying with 1t the sprocket 42 drivin the c haln 43 1n such direction to move t ecarrler 2.5 outwardly from the frame. A brake drum 70 is shown asrotatably mounted on the shaft 40 and carrying an internal gear 71 meshing with planets 72, at least one of which 1s r1g1d with a stud 74 carried by the splder 66, on whlch the sprocket 42 is mounted. When the drum 70 is held against rotation the motion of the shaft 40 ma be transmitted from a pinion 75 on the sliaft, to the planets 72 causing them to revolve within the internal ear 71 carrying the pin 74 around and rotatlng the sprocket 42 in a direction to accomplish the withdrawal of the carriage 25 and d1 per, moving them toward the truck and plat orm.

To swing the dipper upwardly about the pivot of the dipper stick, I have shown chains extending from drums 81 mounted on a shaft 82 supported in bearings on the uprights 9. These chains 80 wind upon these drums and are led over the guide sheaves 84 at the free end of the boom and on the outside of the channel members 6. The chains are attached to rigid links 85 ivoted at 86 to the sides of the di per, each ink being adapted to swing past 51e dipper and dipper stick in such a manner that the free upward movement of the dipper to a point substantially engaging the boom may be accomplished, whereas were the usual single chain and bail to be used, the connection portion of the bail would engage the dipper or dipper stick limiting such upward swlng.

The drums 81 are rotated to accom lish the upward movement of the dipper y a drum 90 on the shaft 82. Anchored to the drum 90 is one end of a cable 91 running over and anchored to a drum 92 mounted on a shaft 93 carrying the gear 35 heretofore mentioned. As the gear 35 is rotated the drum 92 may be clutched with the shaft 93 by a clutch member indicated at 97 in Fig. 3. This causes rotation of the drum 90 and drums 81, drawing onthe chains 80 to swing the dipper forwardly and upwardly about the pivot 24. The downward movement of the dipper is accomplished by gravity, the weight of the dipper and dipper stick being sufficient to swing these drums, consequent upon the release of the clutch 97.

The swinging of the carriage platform 3 by the use of the motor 30 may be accomplished by any suitable mechanism, for example, gearing may be mounted on the shaft 33 driving a sprocket chain 100 meshing with a suitable sprocket on the shaft 102, having a bevel gear 103 meshing with a bevel gear 104 on a vertical shaft 105. A pinion 101, shown in dotted lines in Fig. 1, as secured to the lower end of the shaft 105 may engage the gear 108 on the truck frame to rotate the platform on the frame. The sprocket driving the chain may be driven in opposite directions by mechanism similar to that shown in Fig. 4, suitable means, not shown, being used for holding either of two brake drums 106 or 107 against rotation.

It will benotedl that the construction of the boom is such that it normally stands at approximately the same height as the roof 19, whereby the shovel may be operated in places where the over-head room is no more than sufficient to accommodate the superstructure on the platform.

As shown, the brackets 8 are connected with the outer portions of theside channels 6 of the boom by usset plates 110, while plates 112 are provi ed between the braces 8 and the rear ends of the boom channel 6. These plates are preferably secured to the uprights 9 and to uprights 114, serving as brace members between the braces 8 and boom channels and at the same time providing bearings for a shaft on which a sleeve 49 may be carried. The channels 26 preferably extend outwardly past the channels 6 an are suitably braced at their forward ends b vertical angle members 115, and gusset plates 116 secured to the under side of the boom channels by angle members 117.

From the foregoing description, it will be vseen that I have provided a very compact and simple structure, which practice has demonstrated is very well adapted for accomplishing the purposes of this invention. In th@ usual practice of boom operations, there is provided mechanism on the frame or platform for raising and lowering the boom or swinging the dipper stick and a separate mechanism including a steam engine is mounted on the boom itself for operating a dipper. Such mechanism, however, is `not capable of the compact arrangement shown. Accordingly one of the essentialfeatures of this invention is the provision of means whereby a single motor may be used to move toward and away from the frame and alsol to raise the dipper swinging it about its pivot and an advantage of this construction is that it lends itself readtti hlt

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incassa i ily to the arrangement of the means described for rotating the frame on the truck by use of power from the same motor on the frame. Another characteristic embodied in this invention which has many structural advantages in accomplishing the result sought, is the provision of substantially sep arated boom members between which the dipper stick may operate, and the arrangement of flexible members connected by links to the sides of the dipperand that lead over guide pulleys at the outside of the boom members, and at the free end thereof. rll`his latter feature allows the raising of the dipper stick considerably higher than would otherwise be practicable.

When operating in a tunnel, this advan tage is very important as it is necessary to have the dipper considerably above a car into which the earth may be dum bed.

Having thus described my invention what ll claim is 1. 'lhe combination, with a power shovel, having a frame, an inclined boom adjustably supported thereby with its upper end at the approximate level of the upper portion of the frame, and a dipper, of a motor, means for moving the dipper toward and away from the frame independently of the boom, means for swinging the dipper about an axis, and mechanism for connecting the motor with either of said means.

2. ln a power shovel, the combination of a frame having a platform, an inclined boom adjustably carried thereby with its upper end at theapproximate level of the upper portion of the frame, a dipper slidably and pivotally carried by the boom, means for sliding the dipper toward and away from the platform and boom, said means including gearing and flexible connections, means for clutching the motor with said gearing, means for swinging the dipper about its p1vot, said means lincluding gearing and Hexible connections, and clutch mechanism for connecting said motor with said last mentioned means.

'3. ln a power shovel, the combination with a frame, a boom carried thereby, ways supported by the boom at an angle thereto, a slide mounted therein, a dipper carried by the slide, and a single means for moving the slide and for swinging the dipper upwardly about a pivot.

4. lln a power shovel, the combination of a frame, a boom adjustably carried thereby with its up er end at the approximate level thereof, guldeways supported by the boom and frame, a slide movable therein, a dipper, a dipper' stick pivotally attached to the slide, a motor carried by the frame and means connected 'with said motor and including clutches for moving said slide, and

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means operated by said motor for swinging the dipper upwardly about its pivot.

5. lin a power shovel, the combination of a frame, a boom carried thereby, comprising separated parallel members, a slide between said members, a dipper, a dipper stick therefor pivotally attached to the slide, means for actuating the slide to move the dipper toward and away from the frame and boom, a flexible member attached to each side of the dipper and extending upwardly therefrom, guides for the flexible members mounted on the outer sides of the boom members, and means for drawing on said flexible members.

6. ln a power shovel, the combinaticn of a frame, a boom carried thereby, a dipper and dipper stick, means pivotally connecting the dipper stick to the boom, means for swinging the dipper upwardly toward the boom including non-connected members attached to the sides of the dipper, flexible connections leading upwardly from said members, guides for said flexible connections, and means for winding said flexible connections to raise the dipper.

7. ln a power shovel, the combination of a frame, a dipper and dipper stick pivotally connected thereto, and means for swingmg the dipper upwardly about its pivot, said means including non-connected links ivoted to the sides of the dipper and a flexible connection attached to each.

8. ln a power shovel, the combinatmn of a truck, a frame rotatably mounted thereon. an inclined boom adjustably carried by the frame with its upper end at the approximate level of the upper portion of the frame, a slidable carriage on the boom and movable in a direction substantially perpendicular to the truck, a dipper, a dipper stick therefor pivotally connected to the carriage, and a single means on the truck for independently actuating said carriage and said dipper.

9. ln a power shovel, the combination of a truck, a platform rotatably mounted thereon, a boom carried by the platform, a horizontal guideway carried by the boom, a carriage movable in said guideway, a dipper, a dipper stick therefor, pivotally connected to the carriage, a flexible member for actuating said carriage, means for moving the flexible member including gearing,4 a motor, and clutch mechanism for connecting said gearing with the motor to drive said gearing in opposite directions, separated flexible members attached to theI sides of the dipper, guides on the boom, onto which said flexible members wind, drums therefor, gearing for actuating said drums, and clutch mechanism for connecting said gearing with said motor.

lin testimony whereof, l hereunto amx my signature.

HOLLIS l-l. HRRIS.

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