US3243906A

US3243906A - Excavating bucket structure

Info

Publication number: US3243906A
Application number: US315895A
Authority: US
Inventors: Harry H Washbond
Original assignee: Allis Chalmers Corp
Current assignee: Allis Chalmers Corp
Priority date: 1963-10-14
Filing date: 1963-10-14
Publication date: 1966-04-05
Anticipated expiration: 1983-04-05
Also published as: GB1015876A

Description

April 1966 H. H. WASHBOND 3,243,906

EXCAVATING BUCKET STRUCTURE Filed Oct. 14, 1963 Enoch/141% United States Patent 3,243,996 EXCAVATING BU'IZKET STRUCTURE Harry H. Washbond, Springfield, Ill., assignor to Allis- Chalmers Manufacturing Company, Milwaukee, Wis. Filed Oct. 14, 1963, Ser. No. 315,895 4 Claims. (Cl. 37-141) This invention relates to an excavating bucket structure of the type used on tractor shovels and particularly relates to a heavy duty bucket construction of relatively light weight.

Bucket structures have heretofore been provided with wrap-around blades to increase the corner strength of the bucket, however, even greater strength of the bucket bottom anwd forward corners of the bucket is desired. It is therefore a primary object of my invention to provide the heavy duty bucket of superior strength.

It is a further object of my invention to provide an excavating bucket of rugged construction which is comprised of simple parts for ease of manufacturing and welding.

It is a further object of my invention to provide a heavy wrap-around plate at the front of the bucket for mounting the wrap-around cutting blade which not only provides good support for the cutting blade and good strength at the corners of the bucket but also absorbs the shock incurred in extreme working conditions such as loading rock.

It is a further object of my invention to provide a bucket bottom of superior strength which employs a core type construction wherein a heavy wrap-around plate for mounting the cutting blade serves as a spacer for vertically spaced bottom walls.

It is a further object of my invention to provide a heavy duty bucket construction employing a heavy duty wraparound plate which has upstanding ends serving as forward continuations of the side walls of the bucket.

It is a further object of this invention to provide a heavy duty bucket structure wherein a heavy wrap-around plate is employed for mounting the cutting blade and for spacing the upper and lower bottom walls of the bucket and wherein a reinforcing tooth is mounted on the bucket in bridging relation to the space between the cutting blade and a longitudinally extending slide member having its forward end in backup relation to the cutting blade.

These and other objects and advantages of this invention will be apparent to those familiar with the art, upon reference to the following description and the accompanying drawings in which:

FIG. 1 is a side view of my bucket construction;

FIG. 2 is a section view taken along the line 1IH in FIG. 1;

FIG. 3 is a section view of my bucket bottom taken along the line IIIIII in FIG. 2;

FIG. 4 is a section take along the line IV1V in FIG. 1; and

FIG. 5 is a section view taken along the line VV in FIG. 1.

Referring to FIGS. 1, 2 and 3 the illustrated embodiment of my invention is a heavy duty bucket structure 11 which is connected through pivot connections 12, 13 to a suitable support and adjustment linkage. My bucket structure includes a curved plate 15 presenting a bottom wall 14 having a flat forward section 16, an upwardly sloping section 17, and a curved portion 18 which forms the back wall of the bucket. The laterally oposite ends of the bottom wall 14 are secured by welding to transversely spaced

side walls

21, 22.

In order to provide additional strength in the bottom, the front corners and the front portion of the sides of my ice bucket, I provide a relatively thick wrap-around plate 24. Wrap-around plate 24 has a transversely extending fiat portion 26 secured to and underlying the front portion 16 of the bottom wall 14. The wrap-around plate 24 also has

upstanding end portions

27, 28 which are butt welded at joints 29, 31 to the front edges of the

side walls

21, 22, respectively. Thus the

upstanding end portions

27, 28 of my wrap-around plate 24 constitute front side wall portions of increased thickness and strength. The wraparound plate 24 is of greater thickness than the bottom wall 14 and the

side walls

21, 22. I have found that by using presently known welding techniques, extremely strong butt weld joints can be provided between the rear end of the

upstanding ends

27, 28 on the wrap-around plate 24 and the front ends of the

side walls

21, 22. The bucket side Wall is further strengthened by a flat reinforcing plate 30 welded to the side Wall 21 and to the rear edge of the upstanding portion 27 of wrap-around plate 24. The opposite side of the bucket employs a similar construction. The wrap-around

upstanding end portions

27, 28 are beveled at their top edges to produce tapered surfaces 32, 33 which constitute side cutting edges.

The wrap-around plate bottom portion 26 is welded at its front and rear to the bottom wall 14. In order to provide superior strength in the bottom of my bucket, I provide a core construction which includes a subbottom wall 36. The forward end of the subbottom wall 35 is welded to the rear part of wrap-around plate 24 and additionally the subbottom wall 36 is provided with slots 37 to permit plug welding to the wrap-around plate 24. The rear end of subbottom wall 36 is welded to a transversely extending reinforcing member in the form of an angle 39 which serves to space the subbottom wall 36 from the bottom wall 14. The flanges 40, 41 are welded to the underside of the bottom wall 14 and rear wall 18, respectively. A transversely extending channel member 42 also serves to space the bottom wall 14 from the subbottom wall 36 and to lend strength to the bottom. The flanges of the channel 42 are welded to the underside of the bottom wall 14 and slots 43 are provided in the subbottom wall 36 to permit plug welding of the latter to the channel member 42.

A plurality of wear strips or

slides

46, 47 are welded to the subbottom wall 36 to take the wearing action that would otherwise be 'nnposed on the subbottom wall. The

slides

46, 47 also serve as reinforcing members for the bucket at the points where the excavating teeth 48 are installed. There are two slides 47 provided which extend rearwardly to a greater extent than slides 46. These wrap around the lower end of bracket structures 49, only one of which is shown.

A wrap-around cutting blade 51 is secured by a plurality of rivets 52 to the bottom wall 14 and to the bottom section 26 of the wrap-around plate 24. As shown in FIG. 4, the upstanding sides of the blade 51 are se cured to the

upstanding end portions

27, 28 of the wraparound plate 24 by rivets 53. The

slides

46, 47 terminate at their forward ends adjacent to the rear end of the blade 51 and are of a thickness so that when installed their bottom surface is at approximately the same level as the bottom surface of the wrap-around blade 51. Thus the

slides

46, 47 will not tend to catch or drag during excavation.

The reinforcing teeth 48 have top legs 56 and bottom legs 57 extending rearwardly sufliciently far to permit a rear fastening member in the form of bolt 58 to extend through the slide 46, the subbottom wall 36, the wraparound plate 24 and the bottom wall 14. Thus the gap between the rear end of the cutting blade 51 and the

slides

46, 47, and the subbottom wall 36 is bridged by the bottom legs of the teeth 48. This serves to reinforce the bucket bottom to an extent commensurate with the greater stresses to which it is subjected due to use of the cutting teeth. In addition to the rear fastening means, which includes bolts 58 and nuts 59, front fastening means in the form of bolts 61 and nuts 62 are also provided to secure the

legs

56, 57 to the blade 51, wrap-around plate 24 and the bottom Wall 14.

As shown in FIG. 1, the side wall 21 extends downwardly beyond the bottom wall 14 to be secured by welding to the subbottom wall 36, thus completely enclosing the lower bottom structure and providing a smooth side face for the bucket. The opposite side of the bucket is similarly constructed.

Referring to FIG. 3, it will be noted that the wraparound plate 24 serves not only to provide a strong heavy section forward end for the bucket but also as a spacer for the bottom and

subbottom walls

14, 36. Additionally, as shown in FIGS. 1, 2 and 3, the subbottom wall 36 and

slides

46, 47 serve as backup means for the cutting blade 51.

My bucket construction is made up of easily formed parts which are designed and arranged to make the most effective use of material used and to permit use of conventional welding equipment in manufacturing. This results in not only superior strength where needed to withstand heavy duty use, but also in relatively light weight. The wrap-around plate 24 extends all the way to the top of the sides of the bucket thus providing strong front side portions giving long life in excavating and rock loading operations. The flat section 26 of the plate 24 not only serves as a tough shock absorbing forward portion for the bucket bottom but also as a spacer for the longitudinally extending bottom and

subbottom Walls

14, 36, which together with channel 42 and angle 39 complete an exceptionally strong core bottom construction.

The embodiments of the invention for which an exelusive property or privilege is claimed are defined as follows: 7

1. An excavating bucket comprising:

a pair of spaced upstanding side walls;

a longitudinally extending bottom wall rigidly secured at its laterally opposite ends to the lower portions of said side walls;

a wrap-around plate having a transversely extending portion secured to and underlying the front portion of said bottom wall and including upstanding end portions having their rear edges butt welded, respectively, to the front edges of said side walls to form forward extending continuations of the latter;

a longitudinally extending subbottom wall having a forward portion underlying and secured to the rear part of said transversely extending portion of said wraparound plate;

means vertically spacing the rear portion of said subbottomwall below said bottom wall and rigidly securing said subbottom wall to said bottom wall-along its Width,

and a wrap-around cutting blade connected to said bottom wall and wrap-around plate forwardly ofsaid subbottom wall.

2. The structure set forth in claim 1 and further comprising a plurality of longitudinally extending and transversely spaced slides secured to said subbottom wall and each having a forward end terminating at the rear of said cutting blade, the bottom of said cutting blade being at least as low as the bottom of said forward ends of said slides.

3. The structure set forth in claim 2 and further comprising a plurality of laterally spaced teeth having upper and lower legs secured to said bucket in longitudinally bridging relation to the space between said blade and said slides.

4. The structure set forth in claim 1 wherein said wraparound plate is of heavier section than said side walls.

References Cited by the Examiner UNITED STATES PATENTS 1,757,328 5/1930 Mullally 374-141 1,921,491 8/1933 Van Buskirk 37-141 1,945,064 1/1934 Murtaugh 374-141 2,523,958 9/ 1950 Knobel 37141 3,014,293 12/1961 Boatman 37-141 3,093,917 6/1963 Schoeder 37-+141 ANTONIO F. GUIDA, Acting Primary Examiner.

BENJAMIN HERSH, Examiner.

G. T. MOLLER, Assistant Examiner.

Claims

1. AN EXACAVATING BUCKET COMPRISING: A PAIR OF SPACED UPSTANDING SIDE WALLS; A LONGITUDINALLY EXTENDING BOTTOM WALL RIGIDLY SECURED AT ITS LATERALLY OPPOSITE ENDS TO THE LOWER PORTIONS OF SAID SIDE WALLS; A WRAP-AROUND PLATE HAVING A TRANSVERSELY EXTENDING PORTION SECURED TO AND UNDERLYING THE FRONT PORTION OF SAID BOTTOM WALL AND INCLUDING UPSTANDING END PORTIONS HAVING THEIR REAR EDGES BUTT WELDED, RESPECTIVELY, TO THE FRONT EDGES OF SAID SIDE WALLS TO FORM FORWARD EXTENDING CONTINUATIONS OF THE LATTER; A LONGITUDINALLY EXTENDING SUBBOTTOM WALL HAVING A FORWARD PORTION UNDERLYING AND SECURED TO THE REAR PART OF SAID TRANSVERSELY EXTENDING PORTION OF SAID WRAPAROUND PLATE; MEANS VERTICALLY SPACING THE REAR PORTION OF SAID SUBBOTTOM WALL BELOW SAID BOTTOM WALL AND RIGIDLY SECURING SAID SUBBOTTOM WALL TO SAID BOTTOM WALL ALONG ITS WIDTH, AND A WRAP-AROUND CUTTING BLADE CONNECTED TO SAID BOTTOM WALL AND WRAP-AROUND PLATE FORWARDLY OF SAID SUBBOTTOM WALL.