US20070101622A1 - Edge protector assembly for bucket assembly - Google Patents
Edge protector assembly for bucket assembly Download PDFInfo
- Publication number
- US20070101622A1 US20070101622A1 US11/645,427 US64542706A US2007101622A1 US 20070101622 A1 US20070101622 A1 US 20070101622A1 US 64542706 A US64542706 A US 64542706A US 2007101622 A1 US2007101622 A1 US 2007101622A1
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- United States
- Prior art keywords
- edge protector
- assembly
- bucket
- edge
- bolt
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- 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.)
- Abandoned
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-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
- E02F9/2883—Wear elements for buckets or implements in general
Definitions
- the present disclosure relates generally to bucket assemblies used with machines, and more specifically to edge protector assemblies for the bucket assemblies.
- Machine implements such as bucket assemblies for mining equipment
- portions of the bucket assembly such as side bars, that penetrate the ground and/or material which is to be moved are subjected to the greatest amount of wear.
- a worn side bar can be relatively expensive and time consuming to replace. Because the side bars are generally made from steel and are welded to the bucket assembly, a worn portion of the side bar must be cut out of the bucket assembly and a new portion welded into place.
- many bucket assemblies include side bar protectors that are attached to an edge of the side bar that penetrates the material. The side bar protectors are much more economical and less time consuming to replace than the side bar, itself.
- side bar protectors are removeably attached to the edges of the side bars by connectors, such as brackets, that are welded or bolted to the side bars.
- a side bar protector assembly set forth in U.S. Pat. No. 5,016,365, issued to Robinson, on May 21, 1991, includes side bar protectors with U-shaped cross sections that are attached to mounts welded to a bucket assembly. The mounts fits inside of the side bar protectors and are secured by pins extending through aligned apertures of the mount and side bar protector. The U-shaped cross-section allows the side protectors to wrap around the bucket edge.
- side bar protectors such as the Robinson protector
- many side bar protector assemblies are substantially wider than the side bar, and thus, create an overhang into the bucket assembly.
- the overhang of the protector can trap material between the protector and the side bar wall.
- the material trapped in the bucket is commonly referred to as carry back, and reduces the productivity of the work machine.
- side bar protectors are more economical to replace than the side bar
- the side bar protectors are also subjected to wear.
- the side bar protector will be repeatedly subjected to various loads and impacts. If the loads are not adequately transferred to the bucket assembly through the brackets, the loads can cause a fastener assembly, often consisting of a nut threaded to a bolt, to shear and fail.
- a fastener assembly often consisting of a nut threaded to a bolt, to shear and fail.
- an interface between the mount and the Robinson side bar protector may not provide sufficient contact surface in order to adequately transfer the loads to the bucket assembly, rather than through the pin securing the assembly.
- the side bar protectors must be periodically replaced or repositioned.
- the detachment and reattachment of the protectors can consume valuable time in which that the work machine could be operating.
- at least two tools are often required; one to hold a nut from rotating while another is used to rotate the bolt.
- an edge protector for use with a bucket includes an edge protector with a wear surface contiguous with a back surface, a front surface, a lower surface, and an upper surface.
- the edge protector includes a tapered male mating segment with a fastener receiving bore therethrough. The lower and upper surfaces of the edge protector are parallel to each other.
- an edge protector assembly in another aspect, includes an edge protector with a wear surface contiguous with a back surface, a front surface, a lower surface and an upper surface.
- the edge protector includes a tapered male mating segment with a fastener receiving bore therethrough.
- a connector bracket includes a bucket contact surface, a tapered female mating segment with a fastener receiving bore therethrough and sized for mating to the tapered male mating segment of the edge protector.
- a fastener assembly that includes a nut and a bolt clamps the mating portions together.
- a method of protecting an edge of a bucket includes attaching a connector bracket to a side of the bucket.
- the edge protector is positioned on the connector bracket by mating a tapered female segment to a tapered male segment.
- a bolt is advanced through the male and female tapered segments.
- the tapered segments are clamped together by attaching a nut to the bolt.
- FIG. 1 is a diagrammatic representation of a bucket assembly, according to the present disclosure
- FIG. 2 a is a partial perspective diagrammatic view of an outer surface of an edge protector assembly attached to the bucket assembly of FIG. 1 ;
- FIG. 2 b is a partial perspective diagrammatic view of an inner surface of the edge protector assembly attached to the bucket assembly of FIG. 1 ;
- FIG. 3 is a cross-sectional top diagrammatic representation of the edge protector assembly attached to the bucket assembly of FIG. 2 ;
- FIG. 4 is a cross-sectional side diagrammatic representation of the edge protector assembly, according to a first embodiment of the present disclosure
- FIG. 5 is an exploded diagrammatic view of a connector and fastener assembly of the edge protector assembly of FIG. 4 ;
- FIG. 6 is an exploded diagrammatic view of a connector and fastener assembly of an edge protector assembly, according to a second embodiment of the present disclosure
- FIG. 7 a is an isometric diagrammatic view of an edge protector included within an edge protector assembly, according to a third embodiment of the present disclosure
- FIG. 7 b is an isometric cross-sectional view of the edge protector of FIG. 7 a mated to a connector;
- FIG. 8 is an isometric diagrammatic view of the connector of FIG. 7 b;
- FIG. 9 is an isometric diagrammatic view of a fastener assembly mated to a connector, according to the third embodiment of the present disclosure.
- FIG. 10 is an isometric diagrammatic view of a bucket assembly according to still another embodiment of the present disclosure.
- FIG. 11 is a sectioned view of the edge protector assembly of FIG. 10 .
- FIG. 1 there is shown a diagrammatic representation of a bucket assembly 10 , according to the present disclosure.
- the bucket assembly 10 is designed as a machine implement for use with various machines, including, but not limited to, mining shovels, excavators and wheel loaders.
- an excavator type bucket is shown, this disclosure contemplates other bucket types, such as loader buckets.
- the term “bucket” also encompasses bulldozer blades that include side walls with edges for protecting from wear.
- the bucket assembly 10 includes a bucket 11 that is defined, in part, by two identical sides 47 separated from one another by a middle section 13 . Identical side bars 12 are attached to both sides 47 .
- the middle section 13 may be formed from one piece of material or several pieces welded to one another.
- the side bars 12 and middle section 13 are generally made from a relatively strong material, such as steel plate. Teeth can be attached across a front of the middle section 13 and the side bars 12 in order to help penetrate the material being loaded and moved.
- Each side bar 12 includes a width 12 a .
- the present disclosure contemplates side bars 12 of various widths, including, but not limited to, side bars up to and exceeding three inches thick.
- Each side bar 12 includes an inner side wall surface 14 with an edge 15 .
- Identical edge protector assemblies 16 are attached to each edge 15 of the side wall surfaces 14 by at least two connector brackets 17 . Each edge protector assembly 16 is attached to the edge 15 at a position where the bucket 11 repeatedly penetrates material and debris, and can be made from the same or different material than the side bars 12 .
- FIG. 2 a there is shown a side view of an outer surface 16 a of the edge protector assembly 16 attached to the bucket assembly 10 of FIG. 1 .
- the edge protector assemblies 16 are identical to one another, and thus, can be switched between the two side bars 12 .
- the edge protector assembly 16 includes an edge protector 18 secured to the connector brackets 17 via fastener assemblies 19 .
- the connector brackets 17 can be attached to the side bars 12 in various ways, but preferably are welded to an outside surface of the side bars 12 via the single flange 20 .
- the connectors 17 are illustrated as brackets. Although the brackets 17 are illustrated as including a single flange 20 and protective shield 21 , the present disclosure contemplates brackets without flanges or protective shields.
- the protective shield 21 is designed to protect from wear a portion of the fastener assembly 19 that extends past the edge protector assembly 16 .
- the edge protector 18 is illustrated as straight for use with bucket assemblies for work machines, such as relatively large wheel loaders, it should be appreciated that the present disclosure contemplates edge protectors with various other shapes, such as a curved shape (as shown in FIG. 7 a ).
- FIG. 2 b there is shown a side view of an inner surface 16 b of the edge protector assembly 16 attached to the bucket assembly 10 of FIG. 1 .
- the side bar 12 includes a corner 48 attached to the front of the bucket assembly 10 that includes the teeth. It is known in the art to attach a corner protector 49 onto the edge 15 of the corner 48 in order to protect the corner 48 when penetrating material and debris.
- the edge 15 includes a front portion 50 that is serrated and mates with a corresponding serrated surface 51 of the protector 49 , and a top portion 53 .
- the edge protector assembly 16 preferably includes a tooth 52 that mates under a protrusion 54 of the corner protector 49 that extends over and protects the top portion 53 of the edge 15 . Because the tooth 52 fits against the protrusion 54 of the corner protector 49 , the corner protector 49 can share a side load with the edge protector assembly 16 . The load can be transferred between the edge protector assembly 16 and the corner protector 49 . It should be appreciated that the present invention contemplates the use of the tooth 52 with straight edge protector assemblies as shown in FIGS. 2 a and 2 b.
- FIG. 3 there is shown a partial cross-sectional top diagrammatic representation of the edge protector assembly 16 attached to the bucket assembly 10 of FIG. 2 .
- the edge protector assembly 16 includes an overhang area 22 extending from the side wall surface 14 into the bucket 11 , a protection portion (not shown) covering a protection area 25 of the edge 15 , and an outer area 24 extending from an outer surface of the side bar 12 away from the bucket 11 .
- the inner overhang area 22 is between zero (flush) and one half of the protection area 25 of the edge 15 .
- the inner overhang area 22 is illustrated as being one half of the protection area 25 , preferably, the inner overhang area of the edge protector assembly 16 is zero percent of the protection area 25 , meaning that the edge protector assembly 16 is flush with the surface side wall 14 and there is no inner overhang.
- the outer area 24 is also illustrated as one half of the protection area 25 , the present disclosure contemplates the edge protector assembly with an outer area being of various sizes, or no outer area. It should be appreciated that the greater the width 12 a of the side bar 12 , the more likely the edge protector assembly 16 will be flush with the side wall surface 14 . The greater width can provide more room for the brackets 17 that must be sufficiently thick to mate with and support the edge protector 18 .
- the present disclosure contemplates the edge protector assembly (as shown in FIGS. 7-9 ) being flush with the side wall surface 14 when attached to a three-inch wide side bar, like the side bars used in relatively large mining loaders, shovels and excavators.
- the edge protector assembly 18 can include up to the inner overhang area 22 that is one half of the protection area 25 .
- FIG. 4 there is shown a cross-sectional side diagrammatic representation of the edge protector assembly 16 , according to a first embodiment of the present disclosure.
- the bracket 17 includes a first or female mating portion 26 that is mated to a second or male mating portion 27 of the edge protector 18 .
- the edge protector could include only one second mating portion extending between brackets.
- first mating portion 26 of the bracket 17 includes a tapered cavity 29 and the second mating portion 27 includes a protrusion 30 with a tapered section 31 corresponding to the tapered cavity 29
- the brackets including protrusions or male mating portion(s) and the edge protector including the tapered cavity or female mating portion(s) for receiving the protrusion.
- the tapered cavity 29 of the bracket 17 and the tapered section 31 of the protrusion 30 preferably include identical taper angles 32 .
- the identical taper angles 32 provide an increased contact surface area at an interface 28 between the bracket 17 and the edge protector 18 , thereby reducing stress at the interface 28 caused by loads acting on the assembly 16 during operation by spreading loads over a larger contact area. Because of the close fit between the bracket 17 and the edge protector 18 , a side load (as illustrated by the arrow) acting on the edge protector 18 can transfer to the brackets 17 without shearing the fastener assembly 19 .
- the fastener assembly 19 includes a fastener 33 extending through a bore 34 defend by the first and second mating portions 26 and 27 , and a barrel member 35 mated to the fastener 33 .
- the fastener 33 preferably includes a bolt that is mated to the barrel member 35 , which preferably includes a nut.
- An inner wall 36 of the bore 35 and an outer surface 37 of the bolt 33 define an annular clearance 38 .
- the bolt 33 is not in contact with the edge protector 18 , thereby avoiding sheer loads on the bolt 33 .
- a load acting on a top of the edge protector 18 can be transferred to the side bar 12 through the brackets 12 , and not to the bolt 33 .
- the protector 16 and the bracket 17 , and not the bolt 33 will wear.
- the fastener assembly 19 acts to clamp the protrusion 27 in the cavity 29 .
- FIG. 5 there is shown an exploded view of the bracket 17 and the fastener assembly 19 of FIG. 4 .
- the fastener assembly 19 includes a rotational locking feature 39 that is operable to prohibit rotation of one of the bolt 33 and the nut 35 relative to the brackets 17 .
- the rotational locking feature 39 prohibits the rotation of the bolt 33 via an interaction between the bolt 33 and the bracket 17 .
- the portion of the bore 34 defined by the bracket 17 includes a receiving bore 40 and a counter bore 41 .
- the receiving bore 40 includes a square receiving portion 43 with a rotation stopping surface 42 and that accepts a correspondingly square shaped shoulder 44 of the bolt 33 .
- the bolt 33 is illustrated a conventional plow bolt which includes the square shaped shoulder 44 below a head 45 of the bolt 33 .
- a contact surface 46 of the square shoulder 44 of the plow bolt 33 mates with the rotation stopping surface 42 within the receiving bore 40 .
- the plow bolt head 45 is flush with the edge protector 18 and bracket 17 when secured.
- FIG. 6 there is shown an exploded view of the bracket 17 and a fastener assembly 119 .
- the fastener assembly 119 of the second embodiment is similar to the fastener assembly 19 of the first embodiment in that a plow bolt 133 with the square shaped shoulder 44 is received into the receiving bore 40 .
- a nut of the fastener assembly 119 is not a conventional nut, but includes a threaded retainer 135 that includes a threaded bore 135 a .
- the threaded retainer 135 is received into the counter bore 41 defined by the bracket 17 , and a head 135 b rests on a retainer shoulder within the bore 41 .
- the head 135 b of the retainer 135 is flush with the edge protector 18 and defines a drive feature (not shown) to enable the flush retainer 135 to be rotated via a suitable tool.
- the fastener assembly 119 is flush with both sides of the bracket 17 when secured.
- the retainer 135 extends partially through the portion of the bore 34 defined by the edge protector 18 (not shown).
- a threaded portion 149 of the plow bolt 133 is operable to mate with the threaded bore 135 a of the retainer 135 within the portion of the bore 34 defined by the edge protector 18 (not shown) in order to secure the edge protector 18 to the bracket 17 .
- the contact surface 46 of the bolt shoulder 44 mates with the rotation stopping surface 42 within the receiving bore 40 in order to stop the rotation of the bolt 133 .
- a tool is used to rotate retainer 135 relative to bolt 133 to secure the same.
- FIGS. 7 a and 7 b there are shown a side view of the edge protector 218 , and a cross-sectional view of an edge protector 218 mated to bracket 217 , respectively, according to a third embodiment of the present disclosure.
- the second mating portion 27 of the edge protector 18 in the first and second embodiments includes the protrusion 30 with the tapered section 31
- a second mating portion 227 of the edge protector 218 in the third embodiment includes a tapered cavity 229 for each bracket 217 .
- the portion of the bore 233 defined by the edge protector 218 includes a receiving bore 240 and a counter bore 241 .
- the edge protector 218 is illustrated as curved and symmetrical with a first end 218 a and a second end 218 b . Because both ends 218 a and 218 b of the edge protector 218 are identical, the edge protector 218 is reversible between a first end wear position orientation and a second end wear position orientation with the bucket. In the first end wear position orientation, the first end 218 a is positioned nearest the ground. In the second end wear position orientation, the second end 218 b is positioned nearest the ground. During operation of the bucket assembly, it has been found that the end 218 a or 218 b nearest the ground is subjected to more wear than the end 218 a or 218 b farther from the ground.
- the edge protector 218 when the end 218 or 218 b nearest the ground wears, the edge protector 218 can be rotated rather than replaced. Moreover, due to the symmetry, the edge protectors 218 can be switched between side bars 12 . Not only does the symmetry extend the life of the edge protector 218 , it ensures proper attachment of the edge protectors 218 to the bucket assembly 10 .
- the curved edge protectors 218 are typically designed for use with relatively large shovels and excavators. Although not illustrated, it should be appreciated that the present disclosure contemplates the curved protectors including the tapered protrusions mating with tapered cavities of the brackets.
- a first mating portion 226 of the bracket 217 includes a protrusion 230 with a tapered section 231 corresponding to the tapered cavities 229 of the edge protector 218 of FIGS. 7 a and 7 b .
- Both the tapered section 231 of the protrusion 230 and the tapered cavities 229 include identical taper angles 232 , providing an increase contact surface area at an interface between the bracket 217 and the edge protector 218 .
- the bracket 217 is illustrated without a flange the bracket could include a flange. Without the flange, the edge protector 218 is flush with the bucket 11 .
- FIG. 9 there is shown an isometric view of a fastener assembly 219 extending through the bracket 217 , according to the third embodiment of the present disclosure.
- the fastener assembly 219 includes a retainer system thoroughly described in U.S. Pat. No. 6,712,551 B2, issued to Livesay et al., on Mar. 30, 2004.
- the nut of the fastener assembly 219 is not a convention nut, but rather a threaded retainer 235 that defines a threaded bore 235 a .
- the retainer 235 is positioned within the portion of the bore 234 defined by the bracket 217 , and partially into the receiving bore 241 of the edge protector 218 . Thus, the retainer 235 is hidden in the assembled edge protector assembly 216 .
- the retainer 235 includes a contact surface 246 operable to mate with a rotation stopping surface of an inner surface of the edge protector (not shown).
- a head 245 of the bolt 233 includes a drive feature 245 a that mates with a suitable tool that is operable to rotate the bolt 233 .
- a conventional bolt 233 can be threaded into the threaded bore 235 a of the retainer 235 with a suitable tool as the retainer 235 is held stationary by the interaction between the contact surface 246 of the retainer 235 and the rotation stopping surface of the edge protector 218 .
- the fastener assembly 219 is flush with the edge protector 218 on both the sides of the edge protector 218 .
- a bucket assembly 310 includes an edge protector assembly 316 that is connected to the side 312 of bucket 311 via a single bracket connector 317 , rather than two connector brackets as in the previous embodiments.
- This embodiment recognizes that a majority of the wear occurs in the vicinity of corner protector 341 near the bottom of bucket 311 .
- any number of edge protectors 319 can be mounted on one side 312 of bucket 311 to provide whatever length of wear protection is called for.
- a second edge protector assembly 350 is shown in shadow stacked on the first edge protector assembly 316 .
- edge protector 319 includes a shield or eye brow 321 that protects the nut end of fastener assembly 342 from potential destructive collision with rocks or other material when the bucket is pushed through material during conventional operation.
- eye brow 321 deflects material away from collision with nut 344 and bolt 343 .
- edge protector 319 includes a wear surface 322 that is slanted across its width to urge material into bucket 311 , which also differentiates it from the symmetrical wear surfaces shown in the previous embodiments.
- the wear surface 322 of edge protector 319 is contiguous with a lower surface 324 , and upper surface 323 , a front surface 326 and a back surface 325 .
- the lower and upper surfaces 324 and 323 are parallel to one another. This angle is also preferably such that it matches the angle of the corner of the upper surface of corner protector 341 as best shown in FIG. 10 .
- the edge protector assembly 316 of FIGS. 10 and 11 has versatility of its own and different features from that described earlier, but does not include the symmetry features described earlier so that the left and right edge protector assemblies would have mirror image shapes to one another, and are thus not interchangeable between sides as in the previous embodiments.
- the edge protector 319 is attached to the bucket 311 by first positioning connector bracket 317 at a suitable location, such as at a location where the edge protector 319 will abut the upper surface of corner protector 341 as shown in FIG. 10 .
- the single flange, 331 of the bracket connector 317 is welded to the outer surface 312 of bucket 311 .
- the male mating protrusion 330 is mated to the female mating cavity 338 to seat the tapered protrusion in the tapered cavity as in the previous embodiments.
- a bolt of a fastener assembly 342 which is preferably a plow bolt 343 with a square rotational locking feature is advanced through the fastener receiving bores 334 and 318 of the bracket 317 and edge protector 319 , respectively.
- a nut 344 is then mated to bolt 343 and clamps the mating portions 330 and 338 together as shown in FIG. 1 .
- the fastener receiving bore 318 may be sufficiently large as to define a clearance area between the edge protector 319 and the fastener assembly 343 so that the two do not touch, thus avoiding the transfer of shear loads from the edge protector 319 to the fastener assembly 342 .
- the front surface 326 as well as the inner surface of bracket connector 317 , head of bolt 343 are all flush with the inner surface 313 of bucket 311 .
- bucket assembly 10 the operation of the present disclosure will be discussed for bucket assembly 10 . It should be appreciated that the present disclosure contemplates the bucket assembly being attached to various types of machines, including, but not limited to, wheel loaders, mining shovels, excavators, and bulldozer blades with side edges. The present disclosure is also applicable to smaller buckets, including but not limited to skid steer loader buckets. Although a method of protecting the edges 15 of bucket assembly 10 will be discussed for only one edge 15 , it should be appreciated that the method is the same for protecting both edges 15 .
- the edge protector assembly 16 , 116 , 216 is attached to the edge 15 .
- the edge protector 18 , 218 can be attached to the brackets 17 , 217 by the work machine operator in the field, if necessary.
- the brackets 17 , 217 are welded onto the side bar 12 , and the edge protector 18 , 218 is mated to the brackets 17 , 217 .
- the fastener assembly 19 , 119 , 219 extends through the bore 34 , 234 .
- the plow bolt 33 , 113 is inserted in the receiving bore 40 , and the nut, being either the conventional nut 35 in the first embodiment or the threaded retainer 135 in the second embodiment, is threaded onto the threaded portion 49 , 149 of the plow bolt 33 , 133 .
- the plow bolt 33 in the first embodiment extends through both the receiving bore 40 and the counter bore 41 , and the nut 35 is threaded to the plow bolt 33 in the outer area 24 of the edge protector assembly 16 .
- the rotational locking feature 39 prevents the rotation of the bolt 33 via the interaction between the contact surface 46 on the square shaped shoulder 44 of the bolt 33 and the rotation stopping surface 42 of the receiving bore 40 .
- the nut 35 can be secured to the stationary bolt 33 using a suitable tool, such as a wrench, to rotate the nut 35 .
- a suitable tool such as a wrench
- the plow bolt 133 extends through the receiving bore 40 and the portion of the bore 34 defined by the protrusion 30 of the edge protector 18 .
- the threaded bore 135 a of the retainer 135 is linked with the threaded portion 149 of the bolt 133 by rotating the retainer 135 with a suitable tool, such as an allen wrench, mated to the drive feature.
- a suitable tool such as an allen wrench
- only one tool is needed to link the threaded retainer 135 with the bolt 133 because the contact surface 46 of the square shaped shoulder 44 of the bolt 133 mates with the rotation stopping surface 42 within the receiving bore 40 .
- the rotational locking feature 39 prohibits the rotation of the bolt 33 via the interaction between the bolt 133 and the bracket 17 when the retainer 135 is being tightened. Both sides of the fastener assembly 119 are flush with the edge protector 18 .
- the operator can secure the edge protector 218 to the brackets 217 similarly to the first and second embodiments except that the receiving bore 240 and the counter bore 241 are defined by the edge protector 218 rather than the brackets 217 .
- the threaded retainer 235 is positioned within the portion of the bore 234 that is defined by the bracket 217 , and the bolt 233 is threaded into the threaded bore 235 a of the retainer 235 .
- the threaded retainer 235 is prevented from rotating by the interaction between the contact surface 246 defined by the edge protector 218 and the rotation stopping surface 242 of the threaded retainer 235 .
- the fastener assembly 219 can be linked by rotating the bolt 233 with one suitable tool while the rotational locking feature 239 prevents the threaded retainer 235 from rotating.
- the fastener assembly 219 is flush with both sides of the edge protector 218 .
- the edge 15 of the bucket assembly 10 is also preferably protected by avoiding shear loads on the fastener assembly 19 , 119 , 219 , at least in part, by positioning the bolt 33 , 133 , 233 out of contact with either the edge protector 19 , 219 or the brackets 17 , 217 .
- the annular clearance 38 defined the inner surface of the bore 34 and the outer surface of the bolt 33 allows the loads acting on the edge protector assembly 16 to be transferred to the brackets 17 rather than the fastener assembly 19 . Loads acting on top of the edge protector assembly 16 will be transferred to the bucket side bar 12 , and will avoid the fastener assembly 19 due to the annular clearance 38 .
- the loads acting on the edge protector assembly 19 can be transferred to bucket assembly 10 through the edge protector 18 and not the fastener assembly 19 .
- the edge protector 218 defines the receiving and counter bores 240 and 241 , respectively, and thus, an annular clearance 238 is defined by the fastener assembly 219 and the brackets 217 .
- the fastener assembly 219 is preferably separated from the brackets 217 via the annular clearance 238 .
- the edge 15 of the bucket assembly 10 is preferably protected by reducing stress at the interface 28 between the brackets 17 , 217 and the edge protector 18 , 218 .
- the stress is reduced by contacting at the interface 28 identical taper angles 32 , 232 of the corresponding mating portions 26 , 226 and 27 , 227 of the brackets 17 , 217 and edge protector 18 , 218 , respectively.
- the edge protector 18 , 218 can be mated with the brackets 17 , 217 .
- the identical taper angles 32 , 232 increase the contact surface area at the interface 28 , thereby allowing the loads to transfer from the edge protector 18 , 218 to the brackets 17 , 217 welded to the bucket assembly 10 .
- a load acting along the length of the edge protector assembly 16 , 216 can also be transferred to the brackets 17 , 217 and avoid the fastener assembly 19 , 119 , 219 due to the close fit between the bracket 17 , 217 and the edge protector 18 , 218 .
- the tooth 52 that mates with the protrusion 54 of the corner protector 49 allows a load acting along the length of the assembly 16 to also be transferred to the corner protector 49 .
- the edge protector assembly 16 , 116 , 216 protects the edge 15 of the bucket assembly 10 while also reducing carry back by limiting the inner overhang area 22 of the edge protector assembly 16 , 116 , 216 .
- the edge protector assembly 16 , 116 , 216 does not include the inner overhang area 22 , and thus, is flush with the side wall surface 14 of the bucket assembly 10
- the present disclosure contemplates and is illustrated in FIG. 2 as including the inner overhang area 22 that is up to one half of the protected area 25 of the edge 15 .
- the inner overhang area 22 is sufficiently small that its extension into the bucket 11 does not trap a significant amount of material in the bucket 11 . Rather, the material can slide down the side surface wall 14 and the edge protector assembly 16 , 116 , 216 , and out the bucket assembly 10 . Because all the material being transported can be ejected from the bucket 11 , the productivity of the work machine having bucket assembly 10 is increased.
- the edge protector assembly 16 , 116 , 216 not only protects the edge 15 of the bucket assembly 10 , but also can be replaced by one man with relative ease, absorbs the loads that may act on the assembly 16 , 116 , 216 during operation, and limits carry back. Because the edge protector assembly 16 , 116 , 216 is attached to the edge 15 at a position where the bucket assembly 10 engages material, the edge protector 18 , 218 protects the edge 15 from rocks and debris that could damage the side bars 12 . Thus, over time, the edge protector assembly 16 , 116 , 216 , rather than the side bars 12 , will wear.
- edge protector assemblies 16 , 116 , 216 it is more economical and less time consuming to replace the edge protector assemblies 16 , 116 , 216 than the side bars 12 .
- the curved edge protectors 218 can be rotated such that the end 218 a or 218 b that was receiving less wear can be placed in the position in which it will receive the most wear.
- the present disclosure further allows the work machine operator in the field to rotate the position, or replace, the edge protectors 18 , 218 . Because each embodiment includes the rotational locking feature 39 , 239 that prevents the rotation of either the nut 235 or the bolt 33 , 133 , a second tool to hold the nut 235 or bolt 33 , 133 stationary when linking the fastener assembly 19 , 119 , 219 is unnecessary. Thus, only one suitable tool used by one individual is needed.
- the fact that the edge protector assembly 16 , 116 , 216 can be replaced or rotated with relative ease by one person further reduces the amount of maintenance time and costs associated with the edge protector assemblies 16 , 116 , 216 .
- edge protector assembly 16 , 116 , 216 does not adversely affect the productivity of the bucket assembly 10 . Because the edge protector assembly 16 , 116 , 216 is preferably flush with the side wall surface 14 and, at most, slightly extended into the bucket 11 , material that is being shoveled can be ejected from the bucket 11 without a portion being trapped between the inner overhang 22 and the side wall surface 14 . Thus, the present disclosure limits carry back of material and allows use of the maximum capacity of the bucket 11 , thereby increasing the productivity of the work machine having bucket assembly 10 .
- the present disclosure also increases the life of the edge protector assembly 16 by avoiding shear loads on the fastener assembly 19 , 119 , 219 and reducing stress at the interface 28 between the brackets 17 , 217 and the edge protector 18 , 218 .
- the fastener assembly 19 , 119 , 219 is not designed to withstand the loads that the edge protector 18 , 218 , the brackets 17 , 217 , and the bucket assembly 10 can withstand. If the fastener assembly 19 , 119 , 219 fails, the edge protector assembly 16 , 116 , 216 will fail to protect the edge 15 .
- the present disclosure reduces the risk of premature failure of the fastener assembly 19 , 119 , 219 by separating the fastener assembly 19 , 119 , 219 from either the bracket 17 , 217 or the edge protector 18 , 218 by the annular clearance 38 , 238 , thereby reducing the loads transferred to the fastener assembly 19 , 119 , 219 .
- the present disclosure reduces the stress concentrated at the interface 28 between the bracket 17 , 217 and the edge protector 18 , 218 by increasing the contact between the tapered cavity 29 , 229 and the tapered section 31 , 231 of the protrusion 30 , 230 .
- the present disclosure extends the life of the edge protector assembly 16 , 116 , 216 , thereby reducing costs.
- the edge 315 of a bucket is protected by first attaching a connector bracket 317 to the outside surface of the bucket side 312 , preferably by welding the single flange 331 of bracket connector 317 to the outer surface of bucket side 312 at weld 335 .
- the male and female mating surfaces 330 , 338 are mated as shown in FIG. 11 , in the preferred embodiment, these mating features include identically angled tapered male portion 330 for the edge protector 319 an identical tapered cavity or female mating portion 338 formed as part of bracket connector 317 .
- a bolt 343 is then advanced through the fastener receiving bores 334 and 318 of the female and male tapered portions 330 , 338 , respectively.
- the male and female portions 330 , 338 are then clamped together by attaching a nut 344 to the bolt 343 .
- the attachment of the nut 344 to the bolt 343 is better facilitated in the illustrated embodiment by holding the bolt 343 against rotation via an interaction between the connector bracket 317 and the bolt 343 , such as by utilizing a plow bolt and a counterpart surface as described earlier.
- the nut 344 and exposed end, if any, of bolt 343 are protected by a shield 321 formed on edge protector 319 , that causes debris to be deflected away from collision with the fastener assembly 342 .
- edge protector assemblies 316 , 350 can be stacked atop one another as shown in shadow in FIG. 10 .
- the fastener receiving bore 318 through the edge protector 319 may be sufficiently large to avoid contact with the fastener assembly 342 , so as to avoid shear loads on the bolt 343 by maintaining the fastener assembly 342 out of contact with the edge protector 319 .
- the edge protector assembly 316 of FIGS. 10 and 11 also provides for a slight increase to productivity by forming the wear surface 322 in a way to urge material into the bucket, rather than a symmetrical wear surface as shown in the previous embodiments.
- the head of bolt 343 , the inner surface of bracket connector 317 and the front surface 326 of edge protector 319 may all be flush with the inner surface 313 of the bucket 311 .
- edge protector and the connector bracket may be reversed in any of the embodiments without department from the intended scope of the present disclosure.
- a taper according to the present disclosure could include one side parallel with the side of the bucket.
Abstract
An edge protector assembly is attached, via at least one connector, to an edge of at least one wall surface of a bucket assembly. Each connector includes a first mating portion that is mated to at least one second mating portion of an edge protector of the edge protector assembly. One of the first and second mating portions includes a male protrusion with a tapered section and the other includes a tapered female cavity that receives the tapered section. A fastener assembly secures the edge protector to the connectors, and includes a fastener extending through a bore defined by the first and second mating portions. An inner wall of the bore and an outer surface of the fastener are out of contact with one another to avoid shear loads on the fastener(s). The edge protector assembly is preferably flush with the inner bucket wall surface.
Description
- This application is a continuation-in-part of Ser. No. 10/924,393, filed Aug. 24, 2004, with the same title, now U.S. patent Ser. No. ______.
- The present disclosure relates generally to bucket assemblies used with machines, and more specifically to edge protector assemblies for the bucket assemblies.
- Machine implements, such as bucket assemblies for mining equipment, are subjected to high wear due to the harsh environment in which they operate. Specifically, portions of the bucket assembly, such as side bars, that penetrate the ground and/or material which is to be moved are subjected to the greatest amount of wear. A worn side bar can be relatively expensive and time consuming to replace. Because the side bars are generally made from steel and are welded to the bucket assembly, a worn portion of the side bar must be cut out of the bucket assembly and a new portion welded into place. Thus, many bucket assemblies include side bar protectors that are attached to an edge of the side bar that penetrates the material. The side bar protectors are much more economical and less time consuming to replace than the side bar, itself.
- Often, side bar protectors are removeably attached to the edges of the side bars by connectors, such as brackets, that are welded or bolted to the side bars. For instance, a side bar protector assembly set forth in U.S. Pat. No. 5,016,365, issued to Robinson, on May 21, 1991, includes side bar protectors with U-shaped cross sections that are attached to mounts welded to a bucket assembly. The mounts fits inside of the side bar protectors and are secured by pins extending through aligned apertures of the mount and side bar protector. The U-shaped cross-section allows the side protectors to wrap around the bucket edge.
- Although side bar protectors, such as the Robinson protector, protect the side bar edge from wear, many side bar protector assemblies are substantially wider than the side bar, and thus, create an overhang into the bucket assembly. The overhang of the protector can trap material between the protector and the side bar wall. The material trapped in the bucket is commonly referred to as carry back, and reduces the productivity of the work machine.
- Moreover, although side bar protectors are more economical to replace than the side bar, the side bar protectors are also subjected to wear. During operation of the bucket assembly, the side bar protector will be repeatedly subjected to various loads and impacts. If the loads are not adequately transferred to the bucket assembly through the brackets, the loads can cause a fastener assembly, often consisting of a nut threaded to a bolt, to shear and fail. For instance, an interface between the mount and the Robinson side bar protector may not provide sufficient contact surface in order to adequately transfer the loads to the bucket assembly, rather than through the pin securing the assembly.
- Further, due to wear, the side bar protectors must be periodically replaced or repositioned. The detachment and reattachment of the protectors can consume valuable time in which that the work machine could be operating. In addition, at least two tools are often required; one to hold a nut from rotating while another is used to rotate the bolt.
- In one aspect, an edge protector for use with a bucket includes an edge protector with a wear surface contiguous with a back surface, a front surface, a lower surface, and an upper surface. The edge protector includes a tapered male mating segment with a fastener receiving bore therethrough. The lower and upper surfaces of the edge protector are parallel to each other.
- In another aspect, an edge protector assembly includes an edge protector with a wear surface contiguous with a back surface, a front surface, a lower surface and an upper surface. The edge protector includes a tapered male mating segment with a fastener receiving bore therethrough. A connector bracket includes a bucket contact surface, a tapered female mating segment with a fastener receiving bore therethrough and sized for mating to the tapered male mating segment of the edge protector. A fastener assembly that includes a nut and a bolt clamps the mating portions together.
- In still another aspect, a method of protecting an edge of a bucket includes attaching a connector bracket to a side of the bucket. The edge protector is positioned on the connector bracket by mating a tapered female segment to a tapered male segment. A bolt is advanced through the male and female tapered segments. The tapered segments are clamped together by attaching a nut to the bolt.
-
FIG. 1 is a diagrammatic representation of a bucket assembly, according to the present disclosure; -
FIG. 2 a is a partial perspective diagrammatic view of an outer surface of an edge protector assembly attached to the bucket assembly ofFIG. 1 ; -
FIG. 2 b is a partial perspective diagrammatic view of an inner surface of the edge protector assembly attached to the bucket assembly ofFIG. 1 ; -
FIG. 3 is a cross-sectional top diagrammatic representation of the edge protector assembly attached to the bucket assembly ofFIG. 2 ; -
FIG. 4 is a cross-sectional side diagrammatic representation of the edge protector assembly, according to a first embodiment of the present disclosure; -
FIG. 5 is an exploded diagrammatic view of a connector and fastener assembly of the edge protector assembly ofFIG. 4 ; -
FIG. 6 is an exploded diagrammatic view of a connector and fastener assembly of an edge protector assembly, according to a second embodiment of the present disclosure; -
FIG. 7 a is an isometric diagrammatic view of an edge protector included within an edge protector assembly, according to a third embodiment of the present disclosure; -
FIG. 7 b is an isometric cross-sectional view of the edge protector ofFIG. 7 a mated to a connector; -
FIG. 8 is an isometric diagrammatic view of the connector ofFIG. 7 b; -
FIG. 9 is an isometric diagrammatic view of a fastener assembly mated to a connector, according to the third embodiment of the present disclosure; -
FIG. 10 is an isometric diagrammatic view of a bucket assembly according to still another embodiment of the present disclosure; and -
FIG. 11 is a sectioned view of the edge protector assembly ofFIG. 10 . - Referring to
FIG. 1 , there is shown a diagrammatic representation of abucket assembly 10, according to the present disclosure. Thebucket assembly 10 is designed as a machine implement for use with various machines, including, but not limited to, mining shovels, excavators and wheel loaders. Thus, although an excavator type bucket is shown, this disclosure contemplates other bucket types, such as loader buckets. As used in this document the term “bucket” also encompasses bulldozer blades that include side walls with edges for protecting from wear. Thebucket assembly 10 includes abucket 11 that is defined, in part, by twoidentical sides 47 separated from one another by amiddle section 13.Identical side bars 12 are attached to bothsides 47. Themiddle section 13 may be formed from one piece of material or several pieces welded to one another. Theside bars 12 andmiddle section 13 are generally made from a relatively strong material, such as steel plate. Teeth can be attached across a front of themiddle section 13 and theside bars 12 in order to help penetrate the material being loaded and moved. Eachside bar 12 includes awidth 12 a. The present disclosure contemplates side bars 12 of various widths, including, but not limited to, side bars up to and exceeding three inches thick. Eachside bar 12 includes an innerside wall surface 14 with anedge 15. Identicaledge protector assemblies 16 are attached to eachedge 15 of the side wall surfaces 14 by at least twoconnector brackets 17. Eachedge protector assembly 16 is attached to theedge 15 at a position where thebucket 11 repeatedly penetrates material and debris, and can be made from the same or different material than the side bars 12. - Referring to
FIG. 2 a, there is shown a side view of anouter surface 16 a of theedge protector assembly 16 attached to thebucket assembly 10 ofFIG. 1 . Although the present disclosure will be discussed for oneedge protector assembly 16, it should be appreciated that the discussion can apply to both edge protector assemblies. Theedge protector assemblies 16 are identical to one another, and thus, can be switched between the two side bars 12. Theedge protector assembly 16 includes anedge protector 18 secured to theconnector brackets 17 viafastener assemblies 19. Theconnector brackets 17 can be attached to the side bars 12 in various ways, but preferably are welded to an outside surface of the side bars 12 via thesingle flange 20. Although the present disclosure contemplates any number ofconnectors 17 peredge protector 18, preferably there may be at least twoconnectors 17 in order to limit the movement of theedge protector 18 relative to theconnectors 17. Theconnectors 17 are illustrated as brackets. Although thebrackets 17 are illustrated as including asingle flange 20 andprotective shield 21, the present disclosure contemplates brackets without flanges or protective shields. Theprotective shield 21 is designed to protect from wear a portion of thefastener assembly 19 that extends past theedge protector assembly 16. Although theedge protector 18 is illustrated as straight for use with bucket assemblies for work machines, such as relatively large wheel loaders, it should be appreciated that the present disclosure contemplates edge protectors with various other shapes, such as a curved shape (as shown inFIG. 7 a). - Referring to
FIG. 2 b, there is shown a side view of aninner surface 16 b of theedge protector assembly 16 attached to thebucket assembly 10 ofFIG. 1 . In the illustrated embodiment, theside bar 12 includes acorner 48 attached to the front of thebucket assembly 10 that includes the teeth. It is known in the art to attach acorner protector 49 onto theedge 15 of thecorner 48 in order to protect thecorner 48 when penetrating material and debris. In the illustrated embodiment, theedge 15 includes afront portion 50 that is serrated and mates with a correspondingserrated surface 51 of theprotector 49, and atop portion 53. Theedge protector assembly 16 preferably includes atooth 52 that mates under aprotrusion 54 of thecorner protector 49 that extends over and protects thetop portion 53 of theedge 15. Because thetooth 52 fits against theprotrusion 54 of thecorner protector 49, thecorner protector 49 can share a side load with theedge protector assembly 16. The load can be transferred between theedge protector assembly 16 and thecorner protector 49. It should be appreciated that the present invention contemplates the use of thetooth 52 with straight edge protector assemblies as shown inFIGS. 2 a and 2 b. - Referring to
FIG. 3 , there is shown a partial cross-sectional top diagrammatic representation of theedge protector assembly 16 attached to thebucket assembly 10 ofFIG. 2 . Theedge protector assembly 16 includes anoverhang area 22 extending from theside wall surface 14 into thebucket 11, a protection portion (not shown) covering aprotection area 25 of theedge 15, and anouter area 24 extending from an outer surface of theside bar 12 away from thebucket 11. In all embodiments, theinner overhang area 22 is between zero (flush) and one half of theprotection area 25 of theedge 15. Although theinner overhang area 22 is illustrated as being one half of theprotection area 25, preferably, the inner overhang area of theedge protector assembly 16 is zero percent of theprotection area 25, meaning that theedge protector assembly 16 is flush with thesurface side wall 14 and there is no inner overhang. Although theouter area 24 is also illustrated as one half of theprotection area 25, the present disclosure contemplates the edge protector assembly with an outer area being of various sizes, or no outer area. It should be appreciated that the greater thewidth 12 a of theside bar 12, the more likely theedge protector assembly 16 will be flush with theside wall surface 14. The greater width can provide more room for thebrackets 17 that must be sufficiently thick to mate with and support theedge protector 18. For instance, the present disclosure contemplates the edge protector assembly (as shown inFIGS. 7-9 ) being flush with theside wall surface 14 when attached to a three-inch wide side bar, like the side bars used in relatively large mining loaders, shovels and excavators. However, when used to protect one inch side bars 12, similar to the side bars of wheel loaders, the edge protector assembly 18 (illustrated inFIG. 3 ) can include up to theinner overhang area 22 that is one half of theprotection area 25. - Referring to
FIG. 4 , there is shown a cross-sectional side diagrammatic representation of theedge protector assembly 16, according to a first embodiment of the present disclosure. Although the section is through onebracket 17, it should be appreciated that the section through all of thebrackets 17 mated to theedge protector 18 are identical. Thebracket 17 includes a first orfemale mating portion 26 that is mated to a second ormale mating portion 27 of theedge protector 18. In the illustrated embodiment, there are as manysecond mating portions 27 as there arebrackets 17. However, it should be appreciated that the edge protector could include only one second mating portion extending between brackets. Although thefirst mating portion 26 of thebracket 17 includes a taperedcavity 29 and thesecond mating portion 27 includes aprotrusion 30 with a taperedsection 31 corresponding to the taperedcavity 29, it should be appreciated that the present disclosure contemplates the brackets including protrusions or male mating portion(s) and the edge protector including the tapered cavity or female mating portion(s) for receiving the protrusion. The taperedcavity 29 of thebracket 17 and the taperedsection 31 of theprotrusion 30 preferably include identical taper angles 32. The identical taper angles 32 provide an increased contact surface area at aninterface 28 between thebracket 17 and theedge protector 18, thereby reducing stress at theinterface 28 caused by loads acting on theassembly 16 during operation by spreading loads over a larger contact area. Because of the close fit between thebracket 17 and theedge protector 18, a side load (as illustrated by the arrow) acting on theedge protector 18 can transfer to thebrackets 17 without shearing thefastener assembly 19. - The
fastener assembly 19 includes afastener 33 extending through abore 34 defend by the first andsecond mating portions barrel member 35 mated to thefastener 33. Thefastener 33 preferably includes a bolt that is mated to thebarrel member 35, which preferably includes a nut. Aninner wall 36 of thebore 35 and anouter surface 37 of thebolt 33 define anannular clearance 38. Thus, thebolt 33 is not in contact with theedge protector 18, thereby avoiding sheer loads on thebolt 33. A load acting on a top of theedge protector 18 can be transferred to theside bar 12 through thebrackets 12, and not to thebolt 33. Thus, theprotector 16 and thebracket 17, and not thebolt 33, will wear. When secured, thefastener assembly 19 acts to clamp theprotrusion 27 in thecavity 29. - Referring to
FIG. 5 , there is shown an exploded view of thebracket 17 and thefastener assembly 19 ofFIG. 4 . Although the disclosure is described for onebracket 17 andfastener assembly 19, it should be appreciated that the following description applies to all of the brackets and fastener assemblies. Further, it should be appreciated that when thebracket 17 is mated to theedge protector 18, theprotrusion 27 of theedge protector 18 is aligned in the taperedcavity 29 of thebracket 17. Thefastener assembly 19 includes arotational locking feature 39 that is operable to prohibit rotation of one of thebolt 33 and thenut 35 relative to thebrackets 17. According to the first embodiment, therotational locking feature 39 prohibits the rotation of thebolt 33 via an interaction between thebolt 33 and thebracket 17. The portion of thebore 34 defined by thebracket 17 includes a receivingbore 40 and a counter bore 41. The receiving bore 40 includes a square receivingportion 43 with arotation stopping surface 42 and that accepts a correspondingly square shapedshoulder 44 of thebolt 33. Thebolt 33 is illustrated a conventional plow bolt which includes the square shapedshoulder 44 below ahead 45 of thebolt 33. Acontact surface 46 of thesquare shoulder 44 of theplow bolt 33 mates with therotation stopping surface 42 within the receiving bore 40. Thus, one individual can mate thenut 35 to thebolt 33 with the use of a single tightening tool to rotatenut 35 whilebolt 33 remains stationary. A second tool used to prevent thebolt 33 from rotating is not necessary. Theplow bolt head 45 is flush with theedge protector 18 andbracket 17 when secured. - Referring to
FIG. 6 , there is shown an exploded view of thebracket 17 and afastener assembly 119. It should be appreciated that when thebracket 17 is mated to theedge protector 18, theprotrusion 30 of theedge protector 18 is aligned in the taperedcavity 29 of thebracket 17. Thefastener assembly 119 of the second embodiment is similar to thefastener assembly 19 of the first embodiment in that aplow bolt 133 with the square shapedshoulder 44 is received into the receiving bore 40. However, a nut of thefastener assembly 119 is not a conventional nut, but includes a threadedretainer 135 that includes a threadedbore 135 a. The threadedretainer 135 is received into the counter bore 41 defined by thebracket 17, and ahead 135 b rests on a retainer shoulder within thebore 41. Thehead 135 b of theretainer 135 is flush with theedge protector 18 and defines a drive feature (not shown) to enable theflush retainer 135 to be rotated via a suitable tool. Thus, thefastener assembly 119 is flush with both sides of thebracket 17 when secured. Theretainer 135 extends partially through the portion of thebore 34 defined by the edge protector 18 (not shown). A threaded portion 149 of theplow bolt 133 is operable to mate with the threaded bore 135 a of theretainer 135 within the portion of thebore 34 defined by the edge protector 18 (not shown) in order to secure theedge protector 18 to thebracket 17. Just as in the first embodiment, thecontact surface 46 of thebolt shoulder 44 mates with therotation stopping surface 42 within the receiving bore 40 in order to stop the rotation of thebolt 133. A tool is used to rotateretainer 135 relative to bolt 133 to secure the same. - Referring to
FIGS. 7 a and 7 b, there are shown a side view of theedge protector 218, and a cross-sectional view of anedge protector 218 mated tobracket 217, respectively, according to a third embodiment of the present disclosure. Whereas thesecond mating portion 27 of theedge protector 18 in the first and second embodiments includes theprotrusion 30 with the taperedsection 31, asecond mating portion 227 of theedge protector 218 in the third embodiment includes atapered cavity 229 for eachbracket 217. The portion of thebore 233 defined by theedge protector 218 includes a receivingbore 240 and acounter bore 241. Theedge protector 218 is illustrated as curved and symmetrical with afirst end 218 a and asecond end 218 b. Because both ends 218 a and 218 b of theedge protector 218 are identical, theedge protector 218 is reversible between a first end wear position orientation and a second end wear position orientation with the bucket. In the first end wear position orientation, thefirst end 218 a is positioned nearest the ground. In the second end wear position orientation, thesecond end 218 b is positioned nearest the ground. During operation of the bucket assembly, it has been found that theend end edge protector 218, when theend edge protector 218 can be rotated rather than replaced. Moreover, due to the symmetry, theedge protectors 218 can be switched between side bars 12. Not only does the symmetry extend the life of theedge protector 218, it ensures proper attachment of theedge protectors 218 to thebucket assembly 10. Thecurved edge protectors 218 are typically designed for use with relatively large shovels and excavators. Although not illustrated, it should be appreciated that the present disclosure contemplates the curved protectors including the tapered protrusions mating with tapered cavities of the brackets. - Referring to
FIG. 8 , there is shown an isometric view of thebracket 217, according to the third embodiment of the present disclosure. Afirst mating portion 226 of thebracket 217 includes aprotrusion 230 with atapered section 231 corresponding to the taperedcavities 229 of theedge protector 218 ofFIGS. 7 a and 7 b. Both thetapered section 231 of theprotrusion 230 and the taperedcavities 229 include identical taper angles 232, providing an increase contact surface area at an interface between thebracket 217 and theedge protector 218. Although thebracket 217 is illustrated without a flange the bracket could include a flange. Without the flange, theedge protector 218 is flush with thebucket 11. - Referring to
FIG. 9 , there is shown an isometric view of afastener assembly 219 extending through thebracket 217, according to the third embodiment of the present disclosure. It should be appreciated that when theedge protector 218 is mated to thebracket 217, theprotrusion 230 is surrounded by theedge protector 218. Thefastener assembly 219 includes a retainer system thoroughly described in U.S. Pat. No. 6,712,551 B2, issued to Livesay et al., on Mar. 30, 2004. The nut of thefastener assembly 219 is not a convention nut, but rather a threadedretainer 235 that defines a threadedbore 235 a. Theretainer 235 is positioned within the portion of thebore 234 defined by thebracket 217, and partially into the receiving bore 241 of theedge protector 218. Thus, theretainer 235 is hidden in the assembled edge protector assembly 216. Theretainer 235 includes acontact surface 246 operable to mate with a rotation stopping surface of an inner surface of the edge protector (not shown). Ahead 245 of thebolt 233 includes adrive feature 245 a that mates with a suitable tool that is operable to rotate thebolt 233. Thus, aconventional bolt 233 can be threaded into the threaded bore 235 a of theretainer 235 with a suitable tool as theretainer 235 is held stationary by the interaction between thecontact surface 246 of theretainer 235 and the rotation stopping surface of theedge protector 218. Thefastener assembly 219 is flush with theedge protector 218 on both the sides of theedge protector 218. - Referring to
FIG. 10 , abucket assembly 310 according to another embodiment of the present disclosure includes anedge protector assembly 316 that is connected to theside 312 ofbucket 311 via asingle bracket connector 317, rather than two connector brackets as in the previous embodiments. This embodiment recognizes that a majority of the wear occurs in the vicinity ofcorner protector 341 near the bottom ofbucket 311. However, by shaping theedge protector 319 to have a parallelogram shape, any number ofedge protectors 319 can be mounted on oneside 312 ofbucket 311 to provide whatever length of wear protection is called for. InFIG. 10 , a secondedge protector assembly 350 is shown in shadow stacked on the firstedge protector assembly 316. Theedge protector assembly 316 ofFIGS. 10 and 11 also differs from the previous embodiments in that theedge protector 319 includes a shield oreye brow 321 that protects the nut end offastener assembly 342 from potential destructive collision with rocks or other material when the bucket is pushed through material during conventional operation. In other words,eye brow 321 deflects material away from collision withnut 344 andbolt 343. As best shown inFIG. 11 ,edge protector 319 includes awear surface 322 that is slanted across its width to urge material intobucket 311, which also differentiates it from the symmetrical wear surfaces shown in the previous embodiments. - The
wear surface 322 ofedge protector 319 is contiguous with alower surface 324, andupper surface 323, afront surface 326 and aback surface 325. In order to better facilitate stacking of more than oneedge protector assembly 316, the lower andupper surfaces corner protector 341 as best shown inFIG. 10 . Thus, theedge protector assembly 316 ofFIGS. 10 and 11 has versatility of its own and different features from that described earlier, but does not include the symmetry features described earlier so that the left and right edge protector assemblies would have mirror image shapes to one another, and are thus not interchangeable between sides as in the previous embodiments. - As with the previous embodiments, the
edge protector 319 is attached to thebucket 311 by firstpositioning connector bracket 317 at a suitable location, such as at a location where theedge protector 319 will abut the upper surface ofcorner protector 341 as shown inFIG. 10 . Next, the single flange, 331 of thebracket connector 317 is welded to theouter surface 312 ofbucket 311. Next, themale mating protrusion 330 is mated to thefemale mating cavity 338 to seat the tapered protrusion in the tapered cavity as in the previous embodiments. Next, a bolt of afastener assembly 342, which is preferably aplow bolt 343 with a square rotational locking feature is advanced through the fastener receiving bores 334 and 318 of thebracket 317 andedge protector 319, respectively. Anut 344 is then mated to bolt 343 and clamps themating portions FIG. 1 . As in the previous embodiments, the fastener receiving bore 318 may be sufficiently large as to define a clearance area between theedge protector 319 and thefastener assembly 343 so that the two do not touch, thus avoiding the transfer of shear loads from theedge protector 319 to thefastener assembly 342. Although not necessary, thefront surface 326 as well as the inner surface ofbracket connector 317, head ofbolt 343 are all flush with theinner surface 313 ofbucket 311. - Referring to
FIGS. 1-9 , the operation of the present disclosure will be discussed forbucket assembly 10. It should be appreciated that the present disclosure contemplates the bucket assembly being attached to various types of machines, including, but not limited to, wheel loaders, mining shovels, excavators, and bulldozer blades with side edges. The present disclosure is also applicable to smaller buckets, including but not limited to skid steer loader buckets. Although a method of protecting theedges 15 ofbucket assembly 10 will be discussed for only oneedge 15, it should be appreciated that the method is the same for protecting bothedges 15. - In order to protect the
edge 15 of thebucket assembly 10, theedge protector assembly 16, 116, 216 is attached to theedge 15. Theedge protector brackets brackets side bar 12, and theedge protector brackets edge protector brackets fastener assembly bore brackets 17 define the receiving bore 40 and the counter bore 41, theplow bolt 33, 113 is inserted in the receiving bore 40, and the nut, being either theconventional nut 35 in the first embodiment or the threadedretainer 135 in the second embodiment, is threaded onto the threadedportion 49, 149 of theplow bolt FIG. 5 , theplow bolt 33 in the first embodiment extends through both the receiving bore 40 and the counter bore 41, and thenut 35 is threaded to theplow bolt 33 in theouter area 24 of theedge protector assembly 16. Therotational locking feature 39 prevents the rotation of thebolt 33 via the interaction between thecontact surface 46 on the square shapedshoulder 44 of thebolt 33 and therotation stopping surface 42 of the receiving bore 40. Thus, thenut 35 can be secured to thestationary bolt 33 using a suitable tool, such as a wrench, to rotate thenut 35. When thenut 35 is securely fastened to thebolt 33, thefastener assembly 19 is flush with the inner surface of theedge protector 18, but not the outer surface of theedge protector 18. - Referring specifically to
FIG. 6 , in the second embodiment, theplow bolt 133 extends through the receiving bore 40 and the portion of thebore 34 defined by theprotrusion 30 of theedge protector 18. Within thebore 34, the threaded bore 135 a of theretainer 135 is linked with the threaded portion 149 of thebolt 133 by rotating theretainer 135 with a suitable tool, such as an allen wrench, mated to the drive feature. Similar to the first embodiment, only one tool is needed to link the threadedretainer 135 with thebolt 133 because thecontact surface 46 of the square shapedshoulder 44 of thebolt 133 mates with therotation stopping surface 42 within the receiving bore 40. Thus, therotational locking feature 39 prohibits the rotation of thebolt 33 via the interaction between thebolt 133 and thebracket 17 when theretainer 135 is being tightened. Both sides of thefastener assembly 119 are flush with theedge protector 18. - Referring specifically to
FIG. 9 , according to the third embodiment, the operator can secure theedge protector 218 to thebrackets 217 similarly to the first and second embodiments except that the receivingbore 240 and the counter bore 241 are defined by theedge protector 218 rather than thebrackets 217. The threadedretainer 235 is positioned within the portion of thebore 234 that is defined by thebracket 217, and thebolt 233 is threaded into the threaded bore 235 a of theretainer 235. The threadedretainer 235 is prevented from rotating by the interaction between thecontact surface 246 defined by theedge protector 218 and the rotation stopping surface 242 of the threadedretainer 235. Thus, thefastener assembly 219 can be linked by rotating thebolt 233 with one suitable tool while therotational locking feature 239 prevents the threadedretainer 235 from rotating. Thefastener assembly 219 is flush with both sides of theedge protector 218. - In all embodiments of
FIGS. 1-9 , theedge 15 of thebucket assembly 10 is also preferably protected by avoiding shear loads on thefastener assembly bolt edge protector brackets FIG. 4 , theannular clearance 38 defined the inner surface of thebore 34 and the outer surface of thebolt 33 allows the loads acting on theedge protector assembly 16 to be transferred to thebrackets 17 rather than thefastener assembly 19. Loads acting on top of theedge protector assembly 16 will be transferred to thebucket side bar 12, and will avoid thefastener assembly 19 due to theannular clearance 38. Thus, the loads acting on theedge protector assembly 19 can be transferred tobucket assembly 10 through theedge protector 18 and not thefastener assembly 19. Although the method of avoiding shear loads on thefastener assembly 19 is described and illustrated for the first embodiment, it should be appreciated that the method operates similarly in all embodiments. However, according to the third embodiment (as shown inFIGS. 7-9 ), theedge protector 218 defines the receiving and counter bores 240 and 241, respectively, and thus, anannular clearance 238 is defined by thefastener assembly 219 and thebrackets 217. Thefastener assembly 219 is preferably separated from thebrackets 217 via theannular clearance 238. In all embodiments, because shear loads on thefastener assembly fastener assembly - In all embodiments of
FIGS. 1-9 , theedge 15 of thebucket assembly 10 is preferably protected by reducing stress at theinterface 28 between thebrackets edge protector interface 28 identical taper angles 32, 232 of thecorresponding mating portions brackets edge protector mating portion protrusion 30 or thetapered cavity 229, theedge protector brackets interface 28, thereby allowing the loads to transfer from theedge protector brackets bucket assembly 10. Thus, a load acting along the length of theedge protector assembly 16, 216 can also be transferred to thebrackets fastener assembly bracket edge protector straight edge protectors 18, thetooth 52 that mates with theprotrusion 54 of thecorner protector 49 allows a load acting along the length of theassembly 16 to also be transferred to thecorner protector 49. - Referring specifically to
FIG. 3 , theedge protector assembly 16, 116, 216 protects theedge 15 of thebucket assembly 10 while also reducing carry back by limiting theinner overhang area 22 of theedge protector assembly 16, 116, 216. Although preferably theedge protector assembly 16, 116, 216 does not include theinner overhang area 22, and thus, is flush with theside wall surface 14 of thebucket assembly 10, the present disclosure contemplates and is illustrated inFIG. 2 as including theinner overhang area 22 that is up to one half of the protectedarea 25 of theedge 15. Regardless of whether the inner overhang area is zero or half of the protectedarea 25 of theedge 15, theinner overhang area 22 is sufficiently small that its extension into thebucket 11 does not trap a significant amount of material in thebucket 11. Rather, the material can slide down theside surface wall 14 and theedge protector assembly 16, 116, 216, and out thebucket assembly 10. Because all the material being transported can be ejected from thebucket 11, the productivity of the work machine havingbucket assembly 10 is increased. - The present disclosure is advantageous because the
edge protector assembly 16, 116, 216 not only protects theedge 15 of thebucket assembly 10, but also can be replaced by one man with relative ease, absorbs the loads that may act on theassembly 16, 116, 216 during operation, and limits carry back. Because theedge protector assembly 16, 116, 216 is attached to theedge 15 at a position where thebucket assembly 10 engages material, theedge protector edge 15 from rocks and debris that could damage the side bars 12. Thus, over time, theedge protector assembly 16, 116, 216, rather than the side bars 12, will wear. It is more economical and less time consuming to replace theedge protector assemblies 16, 116, 216 than the side bars 12. In fact, thecurved edge protectors 218 can be rotated such that theend - The present disclosure further allows the work machine operator in the field to rotate the position, or replace, the
edge protectors rotational locking feature nut 235 or thebolt nut 235 orbolt fastener assembly edge protector assembly 16, 116, 216 can be replaced or rotated with relative ease by one person further reduces the amount of maintenance time and costs associated with theedge protector assemblies 16, 116, 216. - Moreover, the
edge protector assembly 16, 116, 216 does not adversely affect the productivity of thebucket assembly 10. Because theedge protector assembly 16, 116, 216 is preferably flush with theside wall surface 14 and, at most, slightly extended into thebucket 11, material that is being shoveled can be ejected from thebucket 11 without a portion being trapped between theinner overhang 22 and theside wall surface 14. Thus, the present disclosure limits carry back of material and allows use of the maximum capacity of thebucket 11, thereby increasing the productivity of the work machine havingbucket assembly 10. - The present disclosure also increases the life of the
edge protector assembly 16 by avoiding shear loads on thefastener assembly interface 28 between thebrackets edge protector fastener assembly edge protector brackets bucket assembly 10 can withstand. If thefastener assembly edge protector assembly 16, 116, 216 will fail to protect theedge 15. Thus, the present disclosure reduces the risk of premature failure of thefastener assembly fastener assembly bracket edge protector annular clearance fastener assembly interface 28 between thebracket edge protector tapered cavity section protrusion bracket edge protector cavity edge protector brackets bolt edge protector assembly 16, 116, 216, thereby reducing costs. - Referring now specifically to
FIGS. 10 and 11 , its attachment and protection strategy of the bucket edge is somewhat similar to the previously described embodiments. For instance, theedge 315 of a bucket is protected by first attaching aconnector bracket 317 to the outside surface of thebucket side 312, preferably by welding thesingle flange 331 ofbracket connector 317 to the outer surface ofbucket side 312 atweld 335. Next, the male and female mating surfaces 330, 338 are mated as shown inFIG. 11 , in the preferred embodiment, these mating features include identically angled taperedmale portion 330 for theedge protector 319 an identical tapered cavity orfemale mating portion 338 formed as part ofbracket connector 317. Abolt 343 is then advanced through the fastener receiving bores 334 and 318 of the female and maletapered portions female portions nut 344 to thebolt 343. The attachment of thenut 344 to thebolt 343 is better facilitated in the illustrated embodiment by holding thebolt 343 against rotation via an interaction between theconnector bracket 317 and thebolt 343, such as by utilizing a plow bolt and a counterpart surface as described earlier. Thenut 344 and exposed end, if any, ofbolt 343 are protected by ashield 321 formed onedge protector 319, that causes debris to be deflected away from collision with thefastener assembly 342. - If an extended length of protection is desired for the
bucket assembly 310, two or more identicaledge protector assemblies FIG. 10 . As in the previous embodiment, the fastener receiving bore 318 through theedge protector 319 may be sufficiently large to avoid contact with thefastener assembly 342, so as to avoid shear loads on thebolt 343 by maintaining thefastener assembly 342 out of contact with theedge protector 319. Theedge protector assembly 316 ofFIGS. 10 and 11 also provides for a slight increase to productivity by forming thewear surface 322 in a way to urge material into the bucket, rather than a symmetrical wear surface as shown in the previous embodiments. In order to better reduce carry back and ease of operation, the head ofbolt 343, the inner surface ofbracket connector 317 and thefront surface 326 ofedge protector 319 may all be flush with theinner surface 313 of thebucket 311. - It should be understood that the above description is intended for illustrative purposes only, and is not intended to limit the scope of the present disclosure in any way. In addition, of the edge protector and the connector bracket may be reversed in any of the embodiments without department from the intended scope of the present disclosure. For instance, a taper according to the present disclosure could include one side parallel with the side of the bucket. Thus, those skilled in the art will appreciate that other aspects, objects, and advantages of the disclosure can be obtained from a study of the drawings, the disclosure and the appended claims.
Claims (15)
1. An edge protector for use with a bucket comprising:
an edge protector that includes a wear surface contiguous with a back surface, a front surface, a lower surface and an upper surface, and including a tapered male mating portion with a fastener receiving bore therethrough; and
the lower and upper surfaces being parallel to each other.
2. The edge protector of claim 1 wherein the wear surface is oriented to urge material contacting the wear surface away from the outer surface and toward the inner surface.
3. The edge protector of claim 2 wherein the outer surface includes a fastener shield oriented to deflect material away from the outer surface.
4. The edge protector of claim 3 wherein the edge protector has a perimeter with a parallelogram shape.
5. An edge protector assembly comprising:
an edge protector that includes a wear surface contiguous with a back surface, a front surface, a lower surface and an upper surface, and including one of a tapered male mating portion and a tapered female mating portion with a fastener receiving bore therethrough;
a connector bracket that includes a bucket contact surface, an other of the male mating portion and the tapered female mating portion with a fastener receiving bore therethrough mated to the mating portion of the edge protector;
a fastener assembly that includes a nut and bolt;
the mating portions being clamped between the nut and bolt when the bolt is received through the fastener receiving bores and attached to the nut.
6. The edge protector assembly of claim 5 wherein the wear surface is oriented to urge material contacting the wear surface away from the outer surface and toward the inner surface.
7. The edge protector assembly of claim 6 wherein the outer surface includes a fastener shield oriented to deflect material away from the outer surface.
8. The edge protector assembly of claim 7 wherein the edge protector has a perimeter with a parallelogram shape.
9. The edge protector assembly of claim 8 wherein the fastener assembly is out of contact with the edge protector.
10. The edge protector assembly of claim 9 wherein the bolt is a plow bolt; and
the fastener receiving bore of the connector bracket interacts with the plow bolt to prevent the plow bolt from rotating.
11. The edge protector assembly of claim 10 wherein the connector bracket includes a single flange welded to an outer surface of the bucket.
12. The edge protector assembly of claim 111 wherein the edge protector includes the male mating portion; and
the bracket connector includes the female mating portion.
13. The edge protector assembly of claim 5 including a plurality of identical edge protectors arranged on one side of a bucket.
14. An edge protector for use with a bucket comprising:
an edge protector that includes a wear surface contiguous with a back surface, a front surface, a lower surface and an upper surface, and including a tapered male mating portion with a fastener receiving bore therethrough;
the wear surface being oriented to urge material contacting the wear surface away from the outer surface and toward the inner surface; and
the outer surface includes a fastener shield oriented to deflect material away from the outer surface.
15. The edge protector of claim 14 wherein the edge protector has a perimeter with a parallelogram shape.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/645,427 US20070101622A1 (en) | 2004-08-24 | 2006-12-26 | Edge protector assembly for bucket assembly |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/924,393 US7275338B2 (en) | 2004-08-24 | 2004-08-24 | Edge protector assembly for bucket assembly |
US11/645,427 US20070101622A1 (en) | 2004-08-24 | 2006-12-26 | Edge protector assembly for bucket assembly |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/924,393 Continuation-In-Part US7275338B2 (en) | 2004-08-24 | 2004-08-24 | Edge protector assembly for bucket assembly |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070101622A1 true US20070101622A1 (en) | 2007-05-10 |
Family
ID=35940988
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/924,393 Active 2024-09-05 US7275338B2 (en) | 2004-08-24 | 2004-08-24 | Edge protector assembly for bucket assembly |
US11/645,427 Abandoned US20070101622A1 (en) | 2004-08-24 | 2006-12-26 | Edge protector assembly for bucket assembly |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/924,393 Active 2024-09-05 US7275338B2 (en) | 2004-08-24 | 2004-08-24 | Edge protector assembly for bucket assembly |
Country Status (3)
Country | Link |
---|---|
US (2) | US7275338B2 (en) |
CN (1) | CN1740461A (en) |
AU (1) | AU2005202752A1 (en) |
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CN104594417A (en) * | 2014-11-26 | 2015-05-06 | 柳州金特机械有限公司 | Excavation bucket |
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Also Published As
Publication number | Publication date |
---|---|
CN1740461A (en) | 2006-03-01 |
US20060042130A1 (en) | 2006-03-02 |
US7275338B2 (en) | 2007-10-02 |
AU2005202752A1 (en) | 2006-03-16 |
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Legal Events
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AS | Assignment |
Owner name: CATERPILLAR INC., ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LAHOOD, JAMES R.;REEL/FRAME:018738/0452 Effective date: 20061220 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |