US2644253A - Hoist shovel - Google Patents

Description

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HoIsT sHovEL Filed April 9, 1951 5 Sheets-Sheet 2 INVENToR. JUAN GUTIERREZ SALIDO HIS ATTORNEY J. G. SALIDO July 7, 1953 HOIST SHOVEL 54 Sheets-Sheet 5 Filed April 9 1951 INVENTOR.

JUAN GUTIERRE SALIDO Hls AT oRNEY Patente-d July 7, 1953 UNITED STATES PATENT OFFICE HOIST SHOVEL Juan Gutierrez Salido, Central Preston, Cuba Application April 9, 1951, Serial No.v 220,198 2 Claims. (Cl. 37e-187) This invention relates to a hoist shovel of the segmental bucket type.

The hoist shovel to which the invention has particular application has utility in the handling v of coal, gravel, earth, and like materials normally lifted by crane. booms in the loading and discharge of materials of this class in respect to ships, cars and excavating operations.

An object of the invention is to provide a hoist shovel which will be Vsimple and economical in construction and efficient in operation.

Another object is to provide apparatus of the character and for the purposes described which may be readily and economically produced.

Other advantages of the invention will be discernible from the description thereof hereinafter set forth.

The invention is embodied in a hoist shovel exemplied in the accompanying drawings in which the views are as follows, like reference numerals designating likev parts throughout the several views:

Fig. 1, a side elevation of the shovel with bucket in closed position and Fig. 2, the same view with buckets in open position;

Fig. 3, the view shown in the preceding figures with the lifting mechanism in a different stage; and

Fig. 4, a front elevation of the shovel.

According to the invention, the hoist shovel l comprises a main frame and a lifting frame slidable therein, a coupling block separate from the lifting frame and engageable therewith, a pair of side plates carried by the main frame and a pair of bucket segments lpivoted thereto, means operable by the coupling block to pivot the bucket segments between open and closed positions, latching means connecting the coupling block with the lifting frame to close the buckets upon the upward movement of the lifting frame and releasable to free the coupling block to drop and open the buckets; the side plates are formed to assist the buckets in defining the load receivable therein.

The hoist shovel has a main frame comprising a pair of upright side posts I (Fig. 4), braced across the top ends thereof by a cross member 2 and terminating at their bottom ends in a pair of sills 3. The cross member 2 has a projecting flange 4 at each end thereof to form a stop member thereon.

Arranged in the main frame for vertical travel in relation thereto, is a lifting frame having a pair of upright slides 5 on each side thereof.

These slides are flanged as at 6 along their side edgesto move in complementary grooves (not shown) formed in a pair of spaced-apart guide rails l running along the outer faces of the posts I. Across the top end thereof, the slides 5 are braced by a cross-member 8 to which a liftingring 9 is fastened to receive a hoisting-'cable I0.

The main frame (Fig. 2) has arranged in the lower portion thereof, a pair of coupling shoes II which are in vertical alinement with the slides vthereabove but separable therefrom and these shoes have their side edges flanged in like mannerv otherwise secured to the upper portions of a pair f of segmental complementary buckets I5 (Fig. 2)l l which are each pivoted upona shaft I6 extending laterally through each bucket and carried by a pair-of side plates Il secured'to the inner faces of the posts I with which they may be integrally formed.

- It will be seen that when the coupling shoe II is moved between its upper position (Fig. 1) and lowermost position (Fig. 2), the links move therewith to pivot the buckets between their closed and open positions. The sills 3 carry a buffer spring I8 to cushion the impact of the shoes II descending thereagainst.

The slides 5 have formed near the bottom ends thereof, a pair of blocks I9 moveable therewith. These blocks carry a stop member 20 at their top ends to limit the upward travel of the lifting frame by engagement with the stops 4 (Fig. 1). The lifting frame is thus reciprocable between the limits imposed between the cross-member 8 and stops (i, it being understood that loading conditions of the buckets may impose limits of travel somewhat short of these stops.

Pivotally connected to the lifting frame, is a latching fra-me comprising a pair of hook levers 2| arranged on each side thereof and fulcrumed on a pair of outwardly projecting pivot pins 22 formed on the blocks i9. At their bottom ends, the levers 2I terminate in hooks 23 engageable with a pair of outwardly extending lift lugs 24 carried by the upper portion of the coupling shoes II (Fig. l), to latch these shoes tothe lifting frame. Thus, when the shovel is in suspension from the hoist cable with the shoes Il latched to 3 the lifting frame, as shown in Fig. 1, the buckets I 5 are in their closed positions.

The hook levers 2 I are urged into latching relation with the lift lugs 24 by a spring 25 fastened at one end to the backs of the levers and at their opposite ends to the blocks I9. Across their top ends, the hook levers are braced by a cross-piece 26 (Figs. l and 4), to which is secured a pulley 2l (zo-operating with a pulley 28 and hook-eye 29 fastened to the 'cross-member 8, whereby a pull cord passingthrough these pulleys may be pulled by an operator in the direction of the arrow (Fig.

1) to disengage the hooks 23 to permit the cou` pling shoes I I to descend for the purpose of open'- ing the buckets as illustrated in Fig. 2, y Y l The side plates Il are shaped at the' Vbottom thereof to form a triangular spade member 3D functioning to assist in the breaking up of hard material handled by the shovel and at the vsaine time confining the material being scooped up thereby. Suitable teeth 3| may be formed along the biting edges ofthe buckets in a manner well known by those skilled in the art.

In practice, the shovel is impin'ged upon the material to be handled with buckets open and resting thereon. In this condition, the cable I0 will be slack and the lifting frame will thus descend in the main frame with hooks 23 engaged. On applying hoist to the cable, the lifting frame is raised thereby to elevate the coupling shoes I I to actuate the links I3 and contract the buckets to close. 1 The loaded shovel is then swung to the discharge point, the operator pulls vthe vcord actuatin'gthelatchingframe to disengage hooks '28.

The coupling shoesy II, now released from the lifting frame, are freed to descend to the bottom of the posts I nto thereby actuate the linkage intervening between the shoes Il and the jaws for V.the expansion Athereof and the discharge of the Vload therefrom.

.The side .plates Il lfunction intermediate the adjacent sidewalls Yof the jaws to form therewith a unitary bucket wall confining the load on each side thereof and the spade point 30, forming the bottom terminus of the plates, is adapted to penetrate the material being loaded to thus assist the bottom edge portions of the jaws therein. These plates, further, d'ene the side limits of the load beingA handled and prevent the spilling of -material between the inner edges of the jaw side walls.

VThe invention thus provides an apparatus of the character herein described meeting the objects hereinabove set forth.

Of course, the invention is susceptible of various modifications without departing from the scope thereof as hereinafter claimed.

Having thus described the invention and the mode of its practice, what I claim as new and desire to secure by Letters Patent of the United States, is:

1. In a hoist shovel having a hoist cable, the

combination therewithrofy vaV lifting frame suspendable therefrom and including apair of upright slides o'n each side thereof, a main frame suspendable from said lifting frame and having a pair of upright posts receiving said slides in "vertical travel therealong, a pair of sidewise Yplates carried by said posts and a pair of oscillatry bucket vjaws pivoted to said plates, a pair of coupling shoes slidable along said posts, linkage means connecting said jaws with said shoes and actuable thereby to oscillate said jaws, an oscillatory latching frame carried by said lifting frame and en'gageable 'with Vsaid shoes to effect Y intermediate central wall portion complementing the side walls :of the `jav/s adjacent thereto whereby to ldefine with saidjaw. side walls a unitary bucket side wall. v

2. The invention as defined i-n claim 1 and: said plates terminating at the bottom thereof ina downwardly directed spade point to penetrate the material loaded by said shovel and define the side limits of the load, 'buffer means arranged in said posts adjacent the bottom thereofV to cushion the impact of said coupling shoes upon the descent thereof.

.UAN GUTIERREZ SALIDO.

'References Cited inthe nie ci this patent UNITED STATES PATENTS' Number a'me y Y Date 376,424V Barrows Jan. 17, 1888 808,630 Brown Jan. 2, 1906 831,089 McGr'ew Sept. 1e, 1906

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