US2008190A - Bucket excavator and loader - Google Patents

Description

Juhrl6r1935.

C. W. SHIPPEE BUCKET EXCAVATOR AND LOADER Filed Dec.

l, 1952 2 Sheets-Sheet 1 July 16, 1935. c. w. sHlPPEE BUCKET EXCAVATOR AND LOADER Filed Deo. l, 1952 2 Sheets-Sheet 2 Vcured to the driving wheels I2. `thus effective to drive the wheels I2 in either de- Patented July 176, 14935 UNITED STATES PATENT orrlcE Y BUCKET EXCAVATOR AND LOADER.

Charles W. Shippee, Worcester, Mass. Application December 1, 1932, Serial No. 645,269

5 Claims.

This invention relates to a machine of the bucket type by which loam, dirt or other material may be economically excavated and loaded.

It is the general object of my invention to provide a machine for such purposes in which improved means for raising and dumping an excavator bucket is provided, together with improved devices for conveniently controlling the operation thereof.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawings, in which Y Fig. 1 is a side elevation vator and loader;

Fig. 2 is a plan view thereof;

Fig; 3 is a detail sectional side elevation, taken along-the line 3 3 in Fig. 2,

Fig. 4 is a detail sectional elevation, taken along the line 4 4 in Fig. 2 and looking inthe direction rof my improved excaj of the arrow 4 in Fig. 3, and

Fig. V5 is a rear. elevation of certain parts, looking in the direction of the arrow 5 in Fig. 4.

Referring to the drawings, I have shown an `excavator and loader of the bucket type and comprising a frame I!) mounted on steering wheels II and driving wheels I 2. An engine Eis connected through the usual clutch and transmission mecha- Vnism to a cross shaft I4 having sprockets I5 connected by chains I6 to sprockets I1 (Fig. 2) se- 'I'he engine E is sired direction.

A body or hopper B ismounted on a, rearward extension of the frame I0 and is provided with gates 20 connected by links 2|. 22 are disposed at the two opposite sides of the `machine, and one end of each cable 22 is secured to one of the links 2l while the other end of each cable 22 is secured to a separate winding drum 23 on a cross shaft 24 mounted in fixed bearings'25 Cords or cables 29 and the drive wheel control devices may be conveniently operated.

A bucket 3U is provided with rolls or trunnions 3| positioned in channeled guideways 32 rigidly mounted on the frame I0. Each guideway 32 preferably comprises an upright intermediate section, a segmental upper section and a short downwardly and rearwardly inclined lower section.

As the bucket 30 is raised by mechanism to be described, it is guided from the full line excavating position shown in Fig. 1 to the dotted line dumping position in the same figure. The substantial inversion of the bucket is effected by the action of the guideways 32 on the trunnions 3 I.

For raising and lowering the bucket 30, I provide cables 40 at each side of the machine. Each oable'40` makes several turns around a separate winding drum 4I on a winding shaft 42. One end of each cable 40 passes over a guide-pulley 44 (Fig. l) and around a second guide-pulley `and is secured to a stud 4S in the bucket 30. The other end of each cable 40 passes around guide-pulleys 50, 5I 52 and 53 and is also secured to the stud 46.

The guide-pulleys 45, 5I 52 and 53 are mounted on brackets secured to the guide-ways S2, while the guide-pulleys 44 and 50 are `mounted on brackets secured to the frame I il or to the body B.

The winding shaft 42 is connected by .sprockets 60 and 6I (Fig. l) and a chain t2 to a reversing clutch mechanism M having a drive shaft E5 (Fig. 2) connected by a chain and sprocket drive to the crank-shaft of the engine E. A clutch shaft 'I0 (Fig. 2) in the mechanism M is connected by an arm 'II and link 'l2 to a control lever I3 (Fig. 1) pivoted at 14 and conveniently adjathe direction of the arrow a in Fig. 3, the winding 4,

shaft 42 will be rotated in one direction and when .the lever 'I3 is displaced in the direction of the arrow b, the winding shaft 42 will be rotated in the oppositeV direction.

or anti-clockwise direction will wind up the upper run of each cable dil, thus lifting the bucket 3B and moving it along the vertical and segmentalY guideways 32 to the dumping position shown in dotted linesin Fig. l.

It should be noted that the short downwardly and rearwardly inclined lower section of the guide-ways 32 cause the bucket to present its front or excavating edge to the material to be excavated, and that as soon as the bucket begins to rise, this front edge is also elevated to prevent displacement of the material in the bucket.

Provision is also made for locking the winding shaft d2, so as to hold the bucket 3i) in any desired position. For this purposeI provide a brake drum Sii (Fig. 3) on the shaft 42 and I provide a brake-shoe Eli mounted on a plunger 8?. vertically slidable in bearings S3 and yieldingly presseddownward against the drum 893 by a heavy coil spring 8d engaging a collar 85 on the plunger. 82.

An arm 8l (Figs. 3 to 5) is secured tothe upper lend or" the plunger Sii and projects over a pair of rolls 83 mounted in spaced relation on a lever ed rocking on a xed pivot Si and connected by a link 92 to a downward extension of the lever 'i3 previously described. n

When the lever i3 and rocking lever Se are in midposition, the rolls are clear of the overlying arm Si and the brake-shoe 8l is forced against the brake-drum til by the coil spring Sil, thus holding thewinding'shaft'd frornrotation. As soon as the lever I3 is displaced from mid or neutralposition in either direction, the lever Se is `also displaced and one ofthe rolls 88 engages the arm Si and raises the brake-shoe 8l from the drum 8G', permitting free rotation of the winding shaft 42.

I thus control the raising and lowering 'of the bucket 39 and the locking of the bucket in any desired position by manipulation of the single lever 13.

My improved excavator and loader is of lsuch construction that the bucket may be lowered and maintained at a desired depth and may be quickly and easily raised `and dumped into the body or .hopper B as soon as the' bucket is filled. While I have shown-and described a self-contained machine adapted to itself transport and dump the loaded material, it is obvious that the body E may be omitted and that the excavated material` may be dumped directly into a trailer or other separately mounted container.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim iszl. An excavator and loader comprising a motor vehicle having a frame, an excavator bucket, guideways for said bucket supported on said frame, and means to move Vsaid bucket in said ignideways between a lowered loading position and a raised and inverted dumping position, said latter means comprising cables secured to said bucket, guide rolls for said cables; and power means to move said cables in both directions and to thereby positively raise said bucket to inverted dumping position and positively return said bucket to lowered excavating position and positively hold said bucket in said latter position.v

2. An excavator and loader comprising a motor vehicle having a frame, an excavator bucket, guideways for said bucket supported on said frame, and means to move said bucket in said guideways from a lowered loading position to a raised and inverted vdumping position, said buckets being open at the front and top when in excavating position and having portions cooperating with said guideways to tilt Vsaid bucket backward to retain its load as the bucket starts to lrise and to thereafter invert said bucket to dump ter means comprising cables secured to said bucket, guide rolls for said cables, and -power means to move said cables in both directions tol positivelyraise and positively lower said bucket, said bucket having portions engaging said guideways at two spaced points on each side of said bucket and being attached to Vsaid cables at a third point on each side of said bucket substantiallyfspaced above the center line of said spaced points and positioned Abetween said points. 2

4.*An excavator and loader comprising a motor vehicle having a frame, an excavator bucket, guideways for said bucket Supprted onV said frame, and means to move said bucket in said guideways from alovveredV loading position to a Y raised and inverted dumping position,said latternleansV comprising cables secured toY said bucket and forming endless operating velements for said bucket and having intermediate portions remote from said bucket, guide rolls for said cables, winding drums Aabout whichsaid intermediate portions of said cables are wrapped, and

means to rotate said drums in either selected direction to positively raise or positively lower said bucket@ v L 5i. An excavator and` loader comprisinga. motor vehiclehaving Aa frame, an excavator bucket, guideways .for said bucket supported on said frame, means to movesaid bucket-in said guide- .ways from aloweredloading position to a raised and inverted dumping position, said buckets being open at the front and top when in excal vating position and having'. portions cooperating Vwith said guideways to tilt. said bucket backward to retain its loadas the bucket starts to rise and to thereafter invert said bucket to dump Vthe load substantially at .its elevated rearward limit of travel, said bucket moving means acting positively. in both directions and positively holding said bucketY in loweredrexcavating position, and

a single manually operated member effective to control and determine the operation of said` bucket moving and holding means.

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