CA1081007A - Loader bucket cutting edge with recessed bolt studs and method - Google Patents
Loader bucket cutting edge with recessed bolt studs and methodInfo
- Publication number
- CA1081007A CA1081007A CA324,438A CA324438A CA1081007A CA 1081007 A CA1081007 A CA 1081007A CA 324438 A CA324438 A CA 324438A CA 1081007 A CA1081007 A CA 1081007A
- Authority
- CA
- Canada
- Prior art keywords
- cutting edge
- edge
- welding
- studs
- recess
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Component Parts Of Construction Machinery (AREA)
Abstract
LOADER BUCKET CUTTING EDGE WITH
RECESSED BOLT STUDS AND METHOD
Abstract of the Disclosure A loader bucket comprises a bottom wall having an elongated general purpose edge disposed forwardly thereon. A
reversible cutting edge is bolted onto an underside of the general purpose edge, along with a plurality of laterally spaced adapters each having a hardened earthworking tip detachably mounted thereon. A plurality of laterally spaced bores are formed to a limited depth on the upper side of the cutting edge and the lower end of a bolt stud is welded within each bore.
The stud extends upwardly through aligned holes formed through the cutting edge and the adapter to have a nut threaded on the upper end thereof. A continuous slot maybe formed along the cutting edge to receive the studs therein. Alternatively, the bores or slot may be formed on an underside of the general pur-pose edge. In carrying forth the method steps of this inven-tion, the studs are flash welded to the upper side of the cutting edge prior to assembly thereof on the bucket.
RECESSED BOLT STUDS AND METHOD
Abstract of the Disclosure A loader bucket comprises a bottom wall having an elongated general purpose edge disposed forwardly thereon. A
reversible cutting edge is bolted onto an underside of the general purpose edge, along with a plurality of laterally spaced adapters each having a hardened earthworking tip detachably mounted thereon. A plurality of laterally spaced bores are formed to a limited depth on the upper side of the cutting edge and the lower end of a bolt stud is welded within each bore.
The stud extends upwardly through aligned holes formed through the cutting edge and the adapter to have a nut threaded on the upper end thereof. A continuous slot maybe formed along the cutting edge to receive the studs therein. Alternatively, the bores or slot may be formed on an underside of the general pur-pose edge. In carrying forth the method steps of this inven-tion, the studs are flash welded to the upper side of the cutting edge prior to assembly thereof on the bucket.
Description
LO~'7 This invention relates to a method for forminy a cutting edge for use on a loader bucket or the like. A con-ventional loader bucket normally comprises a cutting edge secured forwardly on a bottom wall thereof for performing various clean-up operations. In certain work applications, a plurality of laterally spaced adapters and hardened ear-th-working tips are mounted Oll the cutting edge for digging and like earthworking operations.
The substantial loads imposed on the -tips make it imperative that the cutting edge and adapters be firMly secured to the bucket to prevent dislodgement thereof. One of the problems encountered with such an arrangement is that the bolts, releasably attaching the cutting edge and adapters to the bucket, are exposed on an underside of the bucket.
Thus, the exposed bolts are prone -to wear and require periodic replacRment.
According to the invention there is provided a method for forming a cutting edge for use on a loader bucket or the like cornprising the steps of: forming at least one recess of depth D on said cutting edge, positioning a lower end of a fastening stud in said recess, welding the lower end of said fastening stud to said cutting edge, and creating a flash F
of thickness T by said welding, said thickness T being less than said depth D.
The fastening studs are flash welded, preferably by friction welding, to the upper side of the cutting edge prior to assembly thereof on the bucket. ~pon such assembly, the above-described recesses will each accommodate the lower end of a respective fastening stud and the flash formed there-around, i.e., the depth of the recess is no greater than thethickness of the weld flash.
. .
lOBl [:)~7 .
Further features of this invention will become apparent from the following description of embodiments thereof and .
accompanying drawings wherein:
- la -~ 7 FIG. l is a front perspective view of a loader bucket employing the detachable cutting edge arrangement of this in-vention thereon;
FIG. 2 is an enlarged sectional ~iew, taken in the direction of arrows II-II in FIG. l;
FIG. 3 iS a top plan view of a reversible cutting edge employed in the loader bucket and having a plurality of fastening studs secured thereon; .
FIG. 4 iS a front elevational view of the cutting edge, having the fastening studs secured thereon, partially sectioned for clarification purposes;
FIG. 5 is an enlarged view illustrating the lower end of one fastening stud welded within a recess defined in the :
cutting edge;
FIG. 6 iS a view similar to FIG. 3, but illustrating a modification of the cutting edge; and :
FIG. 7 is a view similar to FIG. 2, but illustrating a further modification of this invention.
Detailed Description FIG. 1 illustrates a loader bucket lO having an :-elongated and flat general purpose edge ll disposed forwardly thereon and secured to the bottom wall of the bucket. A flat cutting edge 12 iS mounted beneath the general purpose edge to be substantially coextensive therewith laterally. The cutting edge has a forward edge 13 projecting forwardly therefrom and a plurality of first U-shaped and laterally spaced notches 14 formed therethrough (FIGS. 2 and 3).
A plurality of laterally spaced adapters 15 are each mounted in straddling relationship on general purpose edge 11, as more clearly shown in FIG. 2. In particular, each adapter
The substantial loads imposed on the -tips make it imperative that the cutting edge and adapters be firMly secured to the bucket to prevent dislodgement thereof. One of the problems encountered with such an arrangement is that the bolts, releasably attaching the cutting edge and adapters to the bucket, are exposed on an underside of the bucket.
Thus, the exposed bolts are prone -to wear and require periodic replacRment.
According to the invention there is provided a method for forming a cutting edge for use on a loader bucket or the like cornprising the steps of: forming at least one recess of depth D on said cutting edge, positioning a lower end of a fastening stud in said recess, welding the lower end of said fastening stud to said cutting edge, and creating a flash F
of thickness T by said welding, said thickness T being less than said depth D.
The fastening studs are flash welded, preferably by friction welding, to the upper side of the cutting edge prior to assembly thereof on the bucket. ~pon such assembly, the above-described recesses will each accommodate the lower end of a respective fastening stud and the flash formed there-around, i.e., the depth of the recess is no greater than thethickness of the weld flash.
. .
lOBl [:)~7 .
Further features of this invention will become apparent from the following description of embodiments thereof and .
accompanying drawings wherein:
- la -~ 7 FIG. l is a front perspective view of a loader bucket employing the detachable cutting edge arrangement of this in-vention thereon;
FIG. 2 is an enlarged sectional ~iew, taken in the direction of arrows II-II in FIG. l;
FIG. 3 iS a top plan view of a reversible cutting edge employed in the loader bucket and having a plurality of fastening studs secured thereon; .
FIG. 4 iS a front elevational view of the cutting edge, having the fastening studs secured thereon, partially sectioned for clarification purposes;
FIG. 5 is an enlarged view illustrating the lower end of one fastening stud welded within a recess defined in the :
cutting edge;
FIG. 6 iS a view similar to FIG. 3, but illustrating a modification of the cutting edge; and :
FIG. 7 is a view similar to FIG. 2, but illustrating a further modification of this invention.
Detailed Description FIG. 1 illustrates a loader bucket lO having an :-elongated and flat general purpose edge ll disposed forwardly thereon and secured to the bottom wall of the bucket. A flat cutting edge 12 iS mounted beneath the general purpose edge to be substantially coextensive therewith laterally. The cutting edge has a forward edge 13 projecting forwardly therefrom and a plurality of first U-shaped and laterally spaced notches 14 formed therethrough (FIGS. 2 and 3).
A plurality of laterally spaced adapters 15 are each mounted in straddling relationship on general purpose edge 11, as more clearly shown in FIG. 2. In particular, each adapter
-2-comprises an upper portion 16 extending rearwardly substantially over the full width of general purpose edge 11 and a lower portion 17 extending rearwardly under the forward edge thereof.
Adapter portions 16 and 17 thus cooperate to prevent the adapter from moving vertically relative to the general purpose and cutting edges.
In its illustrated assembled condition, the rearward end of lower portion 17 of the adapter has a U-shape conforming to the shape of a respective notch 14 to be fully accommodated therein. The cutting edge is symmetrical and reversible in that it has a second set of U-shaped notches 18 formed through a rearward edge thereof and disposed in alignment with the first set of notches 14~ Although the cutting edge is shown to constitute one-piece, it should be understood that it can be fa~ricated in two or more aligned sections.
As furthershown in FIGS. 2, a substantially flush and~
co-planar relationship is maintained across the bottom surfaces of cutting edge 12, lower portion 17 of the adapter and a hardened earthworking toc~h or tip 19. The tip is secured on the adapter by standard lock pin 20. Such flush relationship - induces a smooth flow of material into the bucket, deters loose cutting materials from slipping thereu~der which might cause excessive tire wear and also aids in grading and finishing work, for example.
The cutting edge and adapters are releasably secured to general purpose edge 11 by a plurality of first and second fastening means 21 and 22, respectively. As further shown in FIG. 2, each first fastening means 21 comprises a bolt 23 extending upwardly through aligned holes formed through the general purpose edge and a respective adapter 15. A nut 24 is '7 threadably attached on an upper end o~ the bolt and the head end of the bolt is disposed in a respective not~h 18 to protect the same.
The construction and arrangement of second fastening means 22 is important, Each fastening means comprises a fastener or bolt stud 25 having a lower end thereof secured, preferably by welding, to an upper side o~ cutting edge 12. The stud ex-tends upwardly through a pair of aligned holes formed through general purpose edge 11 and upper portion 16 of a respective adapter 15 and has a nut 26 threadably attached on an upper end thereof. As more clearly shown in FIGS. 2 and 3, the lower end of each stud is disposed in a circular recess or bore 27 which ~-is aligned axially with the holes formed through the cutting edge and adapter to receive the stud therein. -Referring to FIGS. 4 and 5, the lower end of each stud is welded within a respective recess 27 to form a flash F.
Depth D of each recess 27 is greater than the thickness of flash F to provide a flush relationship between the engaging surfaces of general purpose edge 11 and cutting edge 12, when the cutting 20 edge is assembled in place (FIG. 2~. The stud is preferably ~-friction welded in place by rotating the lower end of the stud against-the cutting edge to provide ~metallic bond there-between, as taught, for example, in U. S. Patent No. 3,273,233 issued September 20, 1966 to Theodore L. Oberle et al.
FIG. 6 illustrates a modified cutting edge 12a wherein corresponding structures are depicted by identical numerals, but with numerals depicting modified constructions being accompanied by an "a". In essence, the recess for accommodating the lower end of each stud 25 has been modified to comprise a continuous elongated slot 27a formed along the entire length of the cutting ;~
edge. The lower ends of the studs may be placed in a suitable fixture to space them accurately along the cutting. edge and are thereafter welded in place within recess 27a, as explained above.
FIG. 7 illustrates a further modification wherein corresponding structures are depicted by identical numerals, but with numerals depicting modified constructions being accompanied by a "b'~. Comparing FIGS. 2 and 7, it should be noted that a recess 27b is defined on an underside of general purpose edge 11 rather than on the upper side of cutting edge 12b. The recess may comprise the laterally spaced individual and circular recess or counterbores 27 illustrated in FIG. 3 or an elongated slot of the tupe illustrated at 27a in FIG. 6.
The lower end of each stud 25 is welded to an upper flat and uninterrupted side of the cutting edge, in the same manner as explained above, and the flash accruing therefrom would be confined within recess 27b to assure intimate contact between the general purpose edge and the cutting edge. Alternatively, such flash accommodating recess could be formed on the upper side of the cutting edge (FIG. 2) and also on the underside of the general purpose edge (FIG. 7).
While a preferred embodiment fo the invention has herein been illustrated and described, this has been done by way of illustration and not limitation, and the invention should not be limited except as required by the scope of the appended claims.
Adapter portions 16 and 17 thus cooperate to prevent the adapter from moving vertically relative to the general purpose and cutting edges.
In its illustrated assembled condition, the rearward end of lower portion 17 of the adapter has a U-shape conforming to the shape of a respective notch 14 to be fully accommodated therein. The cutting edge is symmetrical and reversible in that it has a second set of U-shaped notches 18 formed through a rearward edge thereof and disposed in alignment with the first set of notches 14~ Although the cutting edge is shown to constitute one-piece, it should be understood that it can be fa~ricated in two or more aligned sections.
As furthershown in FIGS. 2, a substantially flush and~
co-planar relationship is maintained across the bottom surfaces of cutting edge 12, lower portion 17 of the adapter and a hardened earthworking toc~h or tip 19. The tip is secured on the adapter by standard lock pin 20. Such flush relationship - induces a smooth flow of material into the bucket, deters loose cutting materials from slipping thereu~der which might cause excessive tire wear and also aids in grading and finishing work, for example.
The cutting edge and adapters are releasably secured to general purpose edge 11 by a plurality of first and second fastening means 21 and 22, respectively. As further shown in FIG. 2, each first fastening means 21 comprises a bolt 23 extending upwardly through aligned holes formed through the general purpose edge and a respective adapter 15. A nut 24 is '7 threadably attached on an upper end o~ the bolt and the head end of the bolt is disposed in a respective not~h 18 to protect the same.
The construction and arrangement of second fastening means 22 is important, Each fastening means comprises a fastener or bolt stud 25 having a lower end thereof secured, preferably by welding, to an upper side o~ cutting edge 12. The stud ex-tends upwardly through a pair of aligned holes formed through general purpose edge 11 and upper portion 16 of a respective adapter 15 and has a nut 26 threadably attached on an upper end thereof. As more clearly shown in FIGS. 2 and 3, the lower end of each stud is disposed in a circular recess or bore 27 which ~-is aligned axially with the holes formed through the cutting edge and adapter to receive the stud therein. -Referring to FIGS. 4 and 5, the lower end of each stud is welded within a respective recess 27 to form a flash F.
Depth D of each recess 27 is greater than the thickness of flash F to provide a flush relationship between the engaging surfaces of general purpose edge 11 and cutting edge 12, when the cutting 20 edge is assembled in place (FIG. 2~. The stud is preferably ~-friction welded in place by rotating the lower end of the stud against-the cutting edge to provide ~metallic bond there-between, as taught, for example, in U. S. Patent No. 3,273,233 issued September 20, 1966 to Theodore L. Oberle et al.
FIG. 6 illustrates a modified cutting edge 12a wherein corresponding structures are depicted by identical numerals, but with numerals depicting modified constructions being accompanied by an "a". In essence, the recess for accommodating the lower end of each stud 25 has been modified to comprise a continuous elongated slot 27a formed along the entire length of the cutting ;~
edge. The lower ends of the studs may be placed in a suitable fixture to space them accurately along the cutting. edge and are thereafter welded in place within recess 27a, as explained above.
FIG. 7 illustrates a further modification wherein corresponding structures are depicted by identical numerals, but with numerals depicting modified constructions being accompanied by a "b'~. Comparing FIGS. 2 and 7, it should be noted that a recess 27b is defined on an underside of general purpose edge 11 rather than on the upper side of cutting edge 12b. The recess may comprise the laterally spaced individual and circular recess or counterbores 27 illustrated in FIG. 3 or an elongated slot of the tupe illustrated at 27a in FIG. 6.
The lower end of each stud 25 is welded to an upper flat and uninterrupted side of the cutting edge, in the same manner as explained above, and the flash accruing therefrom would be confined within recess 27b to assure intimate contact between the general purpose edge and the cutting edge. Alternatively, such flash accommodating recess could be formed on the upper side of the cutting edge (FIG. 2) and also on the underside of the general purpose edge (FIG. 7).
While a preferred embodiment fo the invention has herein been illustrated and described, this has been done by way of illustration and not limitation, and the invention should not be limited except as required by the scope of the appended claims.
Claims (5)
1. A method for forming a cutting edge for use on a loader bucket or the like comprising the steps of:
forming at least one recess of depth D on said cutting edge, positioning a lower end of a fastening stud in said recess, welding the lower end of said fastening stud to said cutting edge, and creating a flash F of thickness T by said welding, said thickness T being less than said depth D.
forming at least one recess of depth D on said cutting edge, positioning a lower end of a fastening stud in said recess, welding the lower end of said fastening stud to said cutting edge, and creating a flash F of thickness T by said welding, said thickness T being less than said depth D.
2. The method of claim 1 wherein said welding step com-prises friction welding said fastening stud to said cutting edge by rotating said fastening stud relative to said cutting edge and engaging the same to create a metallic bond therebetween.
3. The method of Claim 2 wherein said welding step and flash creating step further comprise disposing said flash entirely within said recess.
4. The method of claim 1 wherein said forming step comprises forming a plurality of individual and circular re-cesses on an upper side of said cutting edge and wherein said welding step comprises welding the lower end of a said fastening stud in each of said recesses.
5. The method of claim 1 wherein said forming step com-prises forming said recess as an elongated single slot along said cutting edge and wherein said welding step comprises welding the lower ends of a plurality of fastening studs in said slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA324,438A CA1081007A (en) | 1976-10-18 | 1979-03-29 | Loader bucket cutting edge with recessed bolt studs and method |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/733,689 US4052803A (en) | 1976-10-18 | 1976-10-18 | Loader bucket cutting edge with recessed bolt studs and method |
| CA281,037A CA1057334A (en) | 1976-10-18 | 1977-06-21 | Loader bucket cutting edge with recessed bolt studs and method |
| CA324,438A CA1081007A (en) | 1976-10-18 | 1979-03-29 | Loader bucket cutting edge with recessed bolt studs and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1081007A true CA1081007A (en) | 1980-07-08 |
Family
ID=27165143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA324,438A Expired CA1081007A (en) | 1976-10-18 | 1979-03-29 | Loader bucket cutting edge with recessed bolt studs and method |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1081007A (en) |
-
1979
- 1979-03-29 CA CA324,438A patent/CA1081007A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
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| MKEX | Expiry |