JP2017203366A - Stabilizing features in wear member assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support method for stabilizing load bearing surfaces on a wear member during ground engaging digging/material displacement operations.SOLUTION: A nose of a wear member assembly includes a first, a second and a third subset of surfaces. The third subset of surfaces is angled and positioned between the first subset of surfaces and the second subset of surfaces. The nose also includes a fourth, a fifth and a sixth subset of surfaces. The sixth set of surfaces is angled and positioned between the first subset of surfaces and the second subset of surfaces. An embodiment has a structure with a cavity comprising rear and forward bearing surfaces corresponding to the third and sixth subset of surfaces.SELECTED DRAWING: Figure 1

Description

  This application is filed on May 13, 2016, US Provisional Patent Application No. 62 / 335,789, entitled “Wear Member Stabilization System with Octagonal Contact Surfaces”, and January 3, 2017. Claims the benefit of US Provisional Patent Application No. 62 / 441,779, filed on the same day and called “Stabilized Specific Structure in Wear Member Assembly”, the disclosure of which is incorporated herein by reference in its entirety. It is incorporated in the specification.

  The present disclosure generally relates to a wear member assembly that digs into the ground, including an adapter that secures a wear member for excavation to a bucket lip. More particularly, the present disclosure relates to a method for stabilizing a load bearing surface between adjacent wear members.

  Exhaust buckets found in construction, mining, and other material removal devices such as earth moving equipment often include replaceable wear parts such as teeth that dig into the ground. They are often removably attached to larger foundation structures such as excavation buckets and are in abrasive contact with the soil or other material being removed. For example, digging teeth deployed on digging equipment such as digging buckets typically comprise a relatively heavy adapter portion that is properly anchored to the front bucket lip. The adapter portion typically includes a forward protruding nose. The replaceable teeth typically include a rearward cavity that removably receives an adapter nose. In order to hold the tooth on the adapter nose, a generally aligned lateral opening may be formed on both the tooth and the adapter nose, and into each aligned opening, A suitable connector structure is driven and forced to hold, so that the replaceable tooth is removably anchored on its associated adapter nose.

  During normal operation, the teeth face a load in multiple directions. If the teeth are not positioned in a stable manner on the nose, the load experienced by the teeth can cause additional wear on the adapter. Accordingly, there is a need for an excellent adapter nose and corresponding opening in the tooth.

  According to some exemplary embodiments, the wear member assembly may include a nose attachable to the bucket lips. The nose may include a rear portion having a first group of eight substantially flat surfaces that converge toward the distal end of the rear portion and toward the longitudinal axis of the nose. The substantially flat surface of the first group comprises a first subset surface having a top and bottom surface, a second subset side surface, and a third subset surface comprising a support surface. Can be included. The surface of the third subset is angled and positioned between the surface of the first subset and the surface of the second subset. The nose is also a front portion located in front of the rear portion, the front portion being directed toward the end of the front portion and converging toward the longitudinal axis of the nose. It may also include a front portion having two substantially flat surfaces. The second group of substantially flat surfaces includes a fourth subset having top and bottom surfaces, a side surface of the fifth subset, and a sixth subset surface comprising a bearing surface. In other words, the surface of the fifth group is angled and positioned between the surface of the first subset and the surface of the second subset. The wear member assembly may also include a wear member having a cavity that opens toward a rear end, the cavities being rear and front corresponding to the surface of the third subset and the surface of the fifth subset. Comprising a support surface.

  According to some exemplary embodiments, the wear member includes a rear portion having a first group of eight surfaces that converge toward the longitudinal axis at a first angle toward the distal end of the rear portion. Including cavities. The first group of substantially flat surfaces can include a top and bottom surface, a group of side surfaces, and a group of diagonal surfaces comprising a bearing surface. The cavity may further include a front portion positioned forward adjacent to the rear portion, the front portion converging toward the longitudinal axis at a second angle that is less than the first angle. It has 8 groups of groups. The cavity may further include a group of pockets located at least partially along the diagonal surface, the pockets having an inward vertical surface.

  According to some exemplary embodiments, the wear member assembly is an adapter nose and a rear portion having a cross-sectional width and a cross-sectional height, the cross-sectional width being different from the cross-sectional height, The rear portion has two unsupported surfaces and four substantially flat support surfaces, the two unsupported surfaces being substantially horizontal in cross section and the four substantially flat support surfaces being The first two of the four substantially flat bearing surfaces are inclined in cross-section and are disposed on a first lateral side of the two substantially flat non-bearing surfaces. A second two of the four substantially flat carrying surfaces are disposed on a second lateral side of the two substantially flat non-carrying surfaces, and At the end, the cross-sectional width of one of the two unsupported surfaces is the four substantial support tables. , The adapter nose that has a rear portion, that different, the cross-sectional width of the any surface of the may include.

  According to some exemplary embodiments, the wear member includes a cavity having a rear portion and a front portion. The rear portion may have a cross-sectional width and a cross-sectional height, and the cross-sectional width is different from the cross-sectional height. The cavity may have two substantially flat unsupported surfaces and four substantially flat support surfaces. The two substantially flat unsupported surfaces can be substantially horizontal in cross section, and the four substantially flat support surfaces can be inclined in cross section. A first two of the four substantially flat bearing surfaces may be disposed on a first lateral side of the two substantially flat non-bearing surfaces and the four substantial The second two surfaces of the substantially flat carrying surface may be disposed on the second lateral side of the two substantially flat non-bearing surfaces. At the end of the rear portion, the cross-sectional width of either of the two substantially flat unsupported surfaces can be different from the cross-sectional width of any of the four substantially supported surfaces.

  The present disclosure includes a specifically shaped carrier surface disposed on a wear member nose, such as an adapter nose, and a correspondingly shaped carrier surface on an additional wear member introduced on the nose. The present invention relates to a wear member assembly having: Both the foregoing general description and the following drawings and detailed description are exemplary and explanatory in nature and provide an understanding of the present disclosure without limiting the scope of the present disclosure. It is understood that is intended. In that regard, additional aspects, features, and advantages of the present disclosure will be apparent to those skilled in the art from the following.

  The present disclosure relates to a method of providing stability and support by stabilizing a load bearing surface on a wear member during excavation / substance removal operations that dig into the ground. In some embodiments, the present disclosure is a hollow ground bite wear member attachable to a support structure, the tip having a tip disposed to bite into the ground and a cavity formed therein. A wear member is described that may include a rear end. The cavity may have an inner surface, a longitudinally extending axis and a front portion, and a rear portion adjacent to the rear end. The inner side surface may have respective inner walls that are spaced apart in the horizontal direction and face each other, and may have inner walls that are spaced apart in the vertical direction to form the upper inner side surface and the lower inner side surface. The upper inner surface and the lower inner surface each have a centrally disposed inwardly projecting bearing surface portion disposed to provide a bearing mat for the support structure. Each inwardly projecting carrying surface portion may be disposed within the rear portion of the cavity and may have a lateral width that is less than the longitudinal length and is receivable within a recess of the support structure. is there. The inwardly projecting carrying surface may be arranged to support a load imposed in the vertical direction at the tip.

  In accordance with some exemplary embodiments, the present disclosure relates to a support structure arranged to receive a wear member, the support structure including a nose arranged to receive a cavity of the wear member. obtain. The nose can include a front portion having a plurality of outward surfaces, each outward surface being angled at a first angle with respect to the longitudinal axis of the nose. The nose may further include a rear portion having two horizontally spaced outward surfaces and two vertically spaced outward surfaces including an upward surface and a downward surface, The spaced outward surface and the vertically spaced outward surface are angled with respect to the longitudinal axis at a second angle different from the first angle. The nose may further include a first concave bearing surface positioned on the upward surface. The nose can further include a second concave bearing surface positioned on the downward facing surface.

  In accordance with additional exemplary embodiments, the present disclosure is directed to a wear member that may include a cavity arranged to mate with an adapter nose. The cavity may include a front portion having a plurality of inward surfaces, each inward surface being angled at a first angle with respect to the longitudinal axis of the cavity. The cavity may include two horizontally spaced inward surfaces and two vertically spaced inward surfaces including an upward surface and a downward surface, the horizontally spaced inward surfaces And the vertically spaced inwardly facing surfaces are angled with respect to the longitudinal axis at a second angle different from the first angle. The cavity may include a first convex bearing surface positioned on the upward surface. The cavity may include a second convex bearing surface positioned on the downward surface.

  In accordance with a further exemplary embodiment, the present disclosure provides a wear member that can include an adapter having a rear end positioned to secure the adapter to a bucket lip and a front end having a nose. Concerning assembly. The wear member also includes an upwardly substantially flat surface that at least partially localizes the upwardly facing concave bearing surface and a downwardly substantially planar surface that at least partially localizes the downwardly concave concave bearing surface. obtain. The wear member assembly may also include a wear member having a front end positioned to bite into the ground and a rear end having a cavity. The cavity may include a downwardly facing surface having a first outward protrusion extending from the cavity, the first outward protrusion being arranged to mate with the upwardly concave bearing surface. The cavity may include an upward surface having a second outward protrusion extending from the cavity, the second outward protrusion being arranged to mate with the downward concave carrying surface.

  The accompanying drawings illustrate embodiments of the systems, devices and methods disclosed herein, and together with the above description serve to explain the principles of the disclosure.

1 is an overview of a wear member assembly that digs into the ground, according to one embodiment that incorporates the principles described herein. FIG. 1 is a perspective view of an adapter nose with carrier surface portions on top and bottom surfaces, according to one embodiment incorporating the principles described herein. FIG. FIG. 6 is a schematic diagram showing a longitudinal cross-sectional overview of a carrier surface portion at the nose of an adapter, according to one embodiment that incorporates the principles described herein. FIG. 6 is a schematic diagram showing a longitudinal cross-sectional overview of a carrier surface portion at the nose of an adapter, according to one embodiment that incorporates the principles described herein. FIG. 2 is a schematic diagram illustrating a cross-sectional overview of a carrying surface portion of a nose, according to one embodiment that incorporates the principles described herein. FIG. 2 is a schematic diagram illustrating a cross-sectional overview of a carrying surface portion of a nose, according to one embodiment that incorporates the principles described herein. 1 is a plan view of a nose with a carrying surface portion, according to one embodiment incorporating the principles described herein. FIG. 1 is a front view of a nose with a carrier surface portion, according to one embodiment incorporating the principles described herein. FIG. FIG. 3 is a perspective view of a tooth having a protrusion corresponding to a carrying surface portion in a nose, according to one embodiment incorporating the principles described herein. FIG. 4 is a longitudinal cross-sectional view of a tooth with a protrusion, according to one embodiment that incorporates the principles described herein. 1 is a transverse cross-sectional view of a tooth with a protrusion, according to one embodiment that incorporates the principles described herein. FIG. 1 is a transverse cross-sectional view of a tooth with a protrusion, according to one embodiment that incorporates the principles described herein. FIG. FIG. 3 is a rear view of a tooth viewed into a cavity, according to one embodiment incorporating the principles described herein. 1 is an exploded perspective view of a wear member assembly that digs into the ground according to one embodiment of the principles described herein. FIG. FIG. 3 shows the nose viewed along the longitudinal axis of the adapter nose, according to one embodiment of the principles described herein. FIG. 3 is a side view of an adapter nose according to one embodiment of the principles described herein. FIG. 3 shows a tooth viewed into a cavity, according to one embodiment of the principles described herein. 1 is a cross-sectional side view of a tooth assembly, according to one embodiment of the principles described herein. FIG. FIG. 3 is a perspective view of an adapter nose according to one embodiment of the principles described herein. FIG. 6 shows an adapter nose with a torsion control specific structure, according to one embodiment of the principles described herein. 1 is a side view of an adapter nose with a torsion control specific structure, according to one embodiment of the principles described herein. FIG. 1 is a perspective view of an adapter nose with a torsion control specific structure according to one embodiment of the principles described herein. FIG. FIG. 3 is a plan view of an adapter nose with a torsion control specific structure, according to one embodiment of the principles described herein. FIG. 5 is a schematic diagram illustrating a tooth having a cavity designed to fit into an adapter nose with a torsion control feature, in accordance with one embodiment of the principles described herein. FIG. 3 shows a cross section of an adapter nose orthogonal to the longitudinal axis, according to one embodiment of the principles described herein. FIG. 3 shows a cross section perpendicular to the longitudinal axis of an adapter nose with a torsion control specific structure, according to one embodiment of the principles described herein. FIG. 4 shows a cross section of the front portion of an adapter nose, according to one embodiment of the principles described herein. FIG. 5 shows a cross section of an adapter nose with an offset torsion control specific structure, according to one embodiment of the principles described herein.

  These figures will be better understood by reference to the following detailed description.

  For the purposes of promoting an understanding of the principles of the disclosure, reference will now be made to the embodiments illustrated in the drawings and specific language will be used to describe them. However, it is understood that no limitation on the scope of the disclosure is intended. Any changes and further modifications to the described device, apparatus, method, and any further application of the principles of the present disclosure, as would normally be conceived by one of ordinary skill in the art to which the disclosure relates, Well planned. In addition, where identical elements or specific structures appear in sequential figures, this disclosure describes several elements or specific structures with no high degree of detail with respect to one or more embodiments or figures. To do. Specific structures, components and / or steps described with respect to one or more embodiments or figures may be combined with specific structures, components and / or steps described with respect to other embodiments or figures of the present disclosure. Is fully contemplated. For simplicity, in some cases, the same or similar reference numerals are used throughout the figures to refer to the same or similar parts.

  The present disclosure relates to a wear member assembly that digs into the ground, including an adapter nose that can be secured to a bucket lip. The wear member assembly that bites into the ground also includes other wear members such as teeth or intermediate adapters that can be secured to the adapter nose. The wear member includes a rearwardly-facing cavity designed to mate with an adapter nose. The nose may include a front group of surfaces and a rear group of surfaces, and in some embodiments, both the front group of surfaces and the rear group of surfaces are in a transverse cross-section. A substantially octagonal shape may be formed. The various surfaces of both the front group of surfaces and the rear group of surfaces may be mating (or carrying) surfaces, while the front group of surfaces and the rear group of other surfaces The surface can be a non-matching (or unsupported) surface. In some specific embodiments, the top and bottom surfaces of the rear group of surfaces can be mating surfaces and an interference bearing specific structure such as a protrusion on one of the teeth or adapters; And may include a matching recess on the other of the tooth or adapter. Together, they can distribute vertical loads on the adapter nose in a manner that supports the stability and alignment of the wear member. As used herein, a mating surface is a load bearing surface.

  In some embodiments, the adapter of the wear assembly that digs into the ground includes a mating surface on the angled side surface. These mating surfaces may be arranged in a manner that provides stabilizing contact to more than one mating surface when the wear assembly that bites into the ground is subjected to vertical or horizontal loads. For example, a given vertical downward load can be supported by two angled mating surfaces, and a given vertical upward load can be supported by two separate angled mating surfaces. Similarly, the left horizontal load can be supported by two angled mating surfaces, and the right horizontal load can be supported by two angled mating surfaces. In some embodiments, a group of angled mating surfaces are disposed on the distal or front end portion of the adapter nose and another group of angled mating surfaces on the proximal or rear end portion of the adapter nose. A surface is disposed. In this way, a wear member, such as a tooth, may be supported by a plurality of angled mating surfaces at both the distal and proximal ends of the adapter nose.

  FIG. 1 is a schematic view of a wear member assembly 100 that bites into the ground according to one embodiment of the present disclosure. In the illustrated embodiment, the wear member assembly 100 that digs into the ground includes a tooth (or wear member) 104, an adapter 102, and a locking pin 106. In this embodiment, wear assembly 100 also includes a shroud wear member 108. The adapter 102 includes a hole (not shown) that receives the locking pin 106. The teeth 104 also include holes through which the locking pins 106 can be inserted. The locking pin 106 can secure the tooth portion 104 on the adapter 102. The adapter 102 may also be referred to herein as a support structure because it provides stabilizing support for an additional component, which in this embodiment is a tooth 104.

  FIG. 2 is a perspective view of the adapter 102. According to this embodiment, the adapter 102 includes a front end 201 and a rear end 212. The front end 201 includes a nose 203, and the rear end 212 includes a pair of legs 214a and 214b that are bifurcated and arranged to secure the adapter 102 to a bucket lip (not shown). A longitudinal axis 211 is shown through the front end 201 and the rear end 212. In a position that would extend parallel to the edge of the bucket lip (not shown), a transverse axis 215 is shown for reference.

  According to this embodiment, the nose 203 includes a front portion 205, a rear portion 207, and an intermediate portion 209 that extends between the front portion 205 and the rear portion 207. The front portion 205 includes a forward facing end surface 220 and a plurality of outward facing surfaces 202 in an octagonal arrangement adjacent to the end surface 220. In this embodiment, each of the surfaces 202 is angled with respect to the longitudinal axis 211. Further, at least four of the surfaces are angled with respect to the transverse axis 215. In some embodiments, at least four of the plurality of surfaces 202 can be load bearing mating surfaces. For example, in some embodiments, each surface 202 may include angled surfaces 202a, 202b, 202c and 202d as load bearing mating surfaces. In other embodiments, each surface 202 may include vertical and horizontal surfaces 202e, 202f, 202g and 202h as load bearing mating surfaces. In some embodiments, each of the surfaces 202 can be substantially flat, while in other embodiments, only four of each surface 202 are substantially flat. In yet another embodiment, different numbers of the eight surfaces 202 are substantially flat.

  In this example, the rear portion 207 also includes a plurality of outward facing surfaces 204 in an octagonal arrangement. Each of the surfaces 204 is angled with respect to the longitudinal axis. Each of the rear surfaces 204 can be angled differently with respect to the longitudinal axis. For example, the side surfaces 204f, 204h can be angled differently with respect to the longitudinal axis than the top and bottom surfaces 204e, 204g. In this embodiment, each rear surface 204 is angled differently from each front surface 202 with respect to the longitudinal axis. Specifically, each rear surface 204 is angled at an angle greater than each front surface 202 with respect to the longitudinal axis. In an embodiment, the various front surfaces 202 can have different angles with respect to the longitudinal axis. Similarly, each back surface 204 can have a different angle with respect to the longitudinal axis. In such an embodiment, the average angle that each of the rear surfaces 204 converges toward the longitudinal axis may be greater than the average angle that each front surface 202 converges toward the longitudinal axis. As shown in the perspective view of FIG. 2, each rear surface 204 includes angled surfaces 204a, 204b, 204c. The opposite side of the nose 203 includes, for example, an additional angled surface 204d recognized in FIGS. 4A and 4B. Each back surface 204 also includes a top surface 204e and a side surface 204h. The nose 203 also includes, for example, a bottom surface 204g, as recognized in FIGS. 4A and 4B, and an opposite side surface 204f. Each back surface 204 may also include a bearing or mating surface. In some embodiments, each of the rear surfaces 204 can be a bearing mating surface. In some embodiments, only angled surfaces 204a, 204b, 204c, 204d can be mating surfaces. In some embodiments, only horizontal and vertical surfaces 204e, 204f, 204g, 204h may be mating surfaces. In some embodiments, each of the surfaces 204 can be substantially flat, while in other embodiments, only four of the eight surfaces 204 are substantially flat. In yet another embodiment, different numbers of surfaces 204 are substantially flat.

  In this example, intermediate portion 209 includes a plurality of outwardly facing surfaces 216. These outwardly facing surfaces 216 extend between and can intersect with each surface 202 and each surface 204. In some embodiments, each surface 216 may be angled with respect to the longitudinal axis 211 differently than each surface 202 and each surface 204. Referring to FIG. 2, each outwardly facing surface 216 may include a plurality of surfaces including an upwardly facing surface 216a and a downwardly facing surface 216b (FIGS. 3A and 3B), among other surfaces. In this embodiment, each side surface of the intermediate portion 209 can include a hole 206. Around the intermediate portion of the nose are disposed additional angled surfaces 216c, 216d, 216e, 216f (as best seen in FIGS. 5 and 6).

  Referring to FIGS. 2, 3A, 3B, 5 and 6, the upward surface 216a of the intermediate portion 209 is different from both the adjacent upper surface 204e of the rear portion 207 and the adjacent top surface 202e of the front portion 205. Can extend at an angle. Accordingly, the upward surface 216a can be non-planar with respect to the adjacent upper surface 204e of the rear portion 207 and the adjacent top surface 202e of the front portion 205. In a similar manner, the downward facing surface 216b of the intermediate portion 209 may extend at a different angle than both the adjacent bottom surface 204g of the rear portion 207 and the bottom surface 202g of the front portion 205.

  In this example, the top surface 204e includes a concave bearing surface 210 positioned thereon. In some embodiments, the top surface 204e confines the concave bearing surface 210. In some embodiments, the concave bearing surface 210 spans the intersection of the upward surface 216a and the top surface 204e. The concave bearing surface 210 is a depression in this embodiment that can provide load bearing stability as well as lateral stability in cooperation with the corresponding protrusion of the wear member 104. Although not visible from this perspective view, the nose 203 may also have a similar concave bearing surface portion on the bottom surface opposite the top surface 204e. In some embodiments, the concave bearing surface on the bottom surface can be shaped identically to the concave bearing surface 210 on the top surface 204e. In this embodiment, the concave support surface 210 is substantially oval in shape. Other shapes are also contemplated. For example, instead of being oval in shape, the concave bearing surface 210 may be circular or have some other form.

  The nose 203 also includes a hole 206 that extends from the side surface 204h to the opposite side surface (not shown in this perspective view). In this embodiment, the hole 206 is formed in the middle portion 209 of the nose 203. The hole 206 is sized and shaped to receive a locking pin. In this example, the hole 206 is located in front of the concave carrying surface 210. In other words, at least a portion of the concave bearing surface 210 is located behind the hole 206. In some embodiments, the entire concave bearing surface 210 can be located behind the hole 206. In other embodiments, the hole 206 extends only partially through the nose 203. A corresponding hole 206 may be formed on the opposite side of the nose 203. In these embodiments, two separate locking pins can be used to secure the wear member 104 to the adapter 102 (see FIG. 1).

  The nose also includes torsion control surfaces 230b, 230d. Torsion control surfaces 230a, 230c are shown in FIGS. 4B and 6. The torsion control features 230a, 230b, 230c and 230d are outwardly facing substantially flat surfaces that abut and correspond to respective corresponding surfaces in the tooth cavity described in more detail below. The surface can be sized and shaped as much as possible. In this embodiment, the twist control surfaces 230a, 230b, 230c, 230d intersect with the angled surfaces 204a, 204b, 204c, 204d of the rear portion 207, respectively. In particular, the torsion control surfaces 230a, 230b, 230c, 230d intersect with such surfaces in the vicinity where the angled surfaces 204a, 204b, 204c, 204d intersect the vertical surfaces 204f, 204h. In some embodiments, the torsion control surfaces 230a, 230b, 230c, 230d can be flush with the vertical surfaces 204f, 204h.

  In some embodiments, each angled surface of both each front surface 202 and each back surface 204 can be a bearing (or mating) surface. Specifically, the surfaces 202a, 202b, 202c, 202d, 204a, 204b, 204c, 204d can be support surfaces. Additionally, the horizontal and top surfaces of each front surface 202 and each back surface 204 can be unsupported (or non-matching) surfaces. Specifically, surfaces 202e, 202f, 202g, 202h, 204e, 204f, 204g, 204h can be unsupported surfaces. Other combinations of supported and non-supported surfaces are also contemplated.

  3A and 3B are schematic views showing a longitudinal cross-sectional view of a portion of the adapter 102, showing an upper concave bearing surface 210 and a lower concave bearing surface 213. FIG. FIG. 3B specifically shows the bearing surface portion 213 at the bottom surface 204g of the nose of the adapter 102. FIG. In some embodiments, the top surface 204e and the bottom surface 204g can both be mating surfaces. In such a case, the other surface, such as each side surface or each angled surface, can be either a mating surface or a non-matching surface. For example, all angled surfaces may be non-matching surfaces, while the top, bottom and side surfaces may be matching surfaces. As indicated above, some embodiments of the concave bearing surface 210 span the intersection of the upward surface 216a and the top surface 204e. In such an embodiment, the upward surface 216a can be a non-matching surface while the concave bearing surface 210 constitutes a matching surface. In some embodiments, the concave surfaces 210, 213 can be unsupported surfaces. In such embodiments, various combinations of horizontal, vertical and angled surfaces can be mating surfaces, and in some cases only angled surfaces are mating surfaces. There can be cases where all surfaces are mating surfaces. Other combinations of mating and non-matching surfaces are contemplated. For example, in a manner similar to that shown below in the description accompanying FIGS. 11A-16D, each angled surface can be a mating surface, while each horizontal and vertical surface is a non-matching surface.

  The bottom concave bearing surface 213 may be substantially the same as the top concave bearing surface portion 210. In some embodiments, the position and shape of the bottom concave carrier surface portion 213 may mirror the position and shape of the top concave carrier surface portion 210. Thus, similar to the arrangement described above, the bottom concave carrying surface 213 can hang over the intersection of the downward facing surface 216b and the bottom surface 204g. In such an embodiment, the bottom facing surface 216b can be a non-matching surface, while the lower concave bearing surface 213 forms a matching surface. In some embodiments, the bottom concave carrier surface portion 213 can be longitudinally offset from the top concave carrier surface portion 210. For example, the bottom concave bearing surface portion 213 may be closer or further away from the front of the nose than the top concave bearing surface portion 210.

  In this embodiment, the concave carrying surface portions 210, 213 are formed as depressions having a smooth, rounded surface as a shape transition from the concave surface to the flat upper surface 204e. The depression provides lateral stability to the rear of the wear member 104 when exposed to a load during use. In addition, when a vertical load is directed onto the front tip of the wear member 104, the depression distributes the load on the rear portion of the wear member and the load passes through the concave bearing surface portions 210, 213. It is transmitted to the adapter (or an intermediate adapter if equipped). In addition, the concave surface portions 210, 213 carrying the load provide a smooth surface with curved sides that assist in lateral stability. Accordingly, the lateral load at the front end of the wear member resulting in a reverse load at the end of the wear member 104 can be mitigated to a certain extent by the curved lateral sides of the concave carrying surface portions 210, 213. As can be appreciated, the depression is formed on a top surface 204e that is angled longitudinally to face the tip surface 220 of the adapter. Accordingly, the corresponding protrusions on the inner surface of the wear member 104 can fit directly into the recessed support surface portions 210 and 213.

  4A and 4B are schematic views showing a transverse cross-sectional overview of the concave carrying surface portions 210, 213 in the adapter 102. FIG. 4A and 4B also show each of the rear surfaces 204. FIG. Specifically, FIGS. 4A and 4B show an upward top surface 204e, outward side surfaces 204f, 204h, and a downward bottom surface 204g. 4A and 4B also show outward angled surfaces 204a, 204b, 204c, 204d. In the exemplary embodiment shown, the concave bearing surface portions 210, 213 are formed in the rear portion 207 only at the upward top surface 204e and the downward bottom surface 204g, while the outward side surface 204f, 204h and the outward angled surfaces 204a, 204b, 204c, 204d are all formed relatively flat. This provides additional mating surface support for vertical loads on the supported teeth 104, while standard support can be provided for horizontal, i.e., load between sides.

  FIG. 5 is a plan view of the nose 203 of the adapter 102. Concave carrying surface portion 210 is shown extending into and across the intersection of upward surface 216e and top surface 204e. In some embodiments, the lateral width 504 of the concave bearing surface portion 210 can be in the range of about 60-80% of the lateral width 508 of the top surface 204e. In some embodiments, the lateral width 504 of the concave bearing surface portion 210 can be about 70% of the lateral width 508 of the top surface 204e. The longitudinal length 502 of the concave bearing surface portion 210 can be similar to the lateral width 504 of the concave bearing surface portion 210. In some embodiments, the longitudinal length 502 of the concave carrier surface portion 210 can be greater than the lateral width 504 within a range of about 0-50%. The concave bearing surface portion 210 can be sized to provide stability and increase the surface area of the top surface 204e while minimizing weakening of the adapter 102 due to stress concentrations. Accordingly, the depth of the recessed support surface can be selected to provide the necessary balance of stability and strength. In some embodiments, the depth of the support surface portion is selected to be in the range of about 0.1 inches to about 0.625 inches, although other depths are contemplated.

  FIG. 6 is a slightly tilted front view of adapter 102 with concave carrying surface portion 210. FIG. 6 also shows a top surface 204e, a top surface 202e, and a top surface 216a. FIG. 6 also shows the rear angled surfaces 204a, 204b, the front angled surfaces 202a, 202b, and the intermediate unsupported surfaces 216c and 216f.

  FIG. 7A is a perspective view of the wear member 104 including protrusions extending from the inner surface of the cavity. The wear member 104 may also be referred to as a hollow ground bite wear member. The wear member 104 may also be referred to as a tooth, but the wear member 104 may also be supported by another wear member or may constitute an intermediate adapter or other wear member configured to support it. . The wear member 104 includes a tip 708 at the front end 701 of the wear member. The tip 708 is arranged to bite into or penetrate the ground and may be generally referred to as a working end. The wear member 104 also includes a rear end having a cavity (shown in cross section in FIG. 7B) that is sized and shaped to receive the nose 203 of the adapter 102.

  In this example, side 709 of wear member 104 includes a hole 711 that is sized and shaped to receive locking pin 106 (FIG. 1). In some embodiments, the opposite side of the wear member 104 may include similar holes. The hole 711 can be positioned such that the hole 711 is aligned with the hole 206 of the adapter 102 when the wear member 104 is properly installed on the nose 203. Thus, the locking pin 106 can be inserted through and installed in the holes 206, 711 to hold the wear member 104 on the adapter 102.

  In this embodiment, the wear member 104 includes a wear indicator 731. The wear indicator 731 may be a depression or depression in the wear member 104 that indicates to the operator when the wear member 104 is to be replaced. Specifically, the wear member 104 wears as it is used for excavation operations. When it wears to a location where the bottom of the wear indicator 731 is flush with the rest of the wear member 104, this indicates to the operator that it is time to replace the wear member 104. The wear indicator 731 can be sized and shaped so that it has a depth associated with the amount of wear expected before the wear member 104 is to be replaced. This expected amount of wear may be based on historical data representing the manner in which wear member 104 wears during normal operation. The wear indicator 731 can also be located elsewhere on the wear member 104.

  FIG. 7B is a longitudinal cross-sectional view of the wear member 104 showing the upper protrusion 706 and the lower protrusion 707 positioned to correspond to the concave bearing surfaces 210, 213 on the adapter 102. The wear member 104 includes a front end portion 708 and a rear end portion 703. A cavity 702 extending inward in the longitudinal direction from the rear end 703 is formed in the rear end 703. The cavity 702 opens to the rear of the wear member 104 and is shaped and dimensioned to fit into the nose 203 of the adapter 102.

  In some embodiments, the cavity 702 is shaped to have surfaces corresponding to the various surfaces of the nose 203. In some embodiments, not all surfaces are mating surfaces, so only the mating surfaces of cavity 702 and nose 203 have the same shape. That is, the cavity 702 can be contoured such that the mating surface of the cavity 702 matches the mating surface of the adapter 102. Thus, the corresponding description herein relating to each outer surface of the nose 203 applies equally to each inner surface of the cavity 702 of the wear member 104. Similar to the nose 203, the cavity 702 includes a front portion 720, a rear portion 722, and an intermediate portion 724. Cavity 702 also includes a longitudinal axis 718 that is coaxial with the longitudinal axis of wear member 104 in this embodiment. A transverse axis 719 (FIGS. 7A and 10) extends perpendicular to the longitudinal axis 718 and the transverse axis should be substantially parallel to the tip of the bucket lip. Be placed.

  According to this embodiment, the cavity 702 includes a front portion 720, an intermediate portion 724 and a front portion 720. The front portion 720 is octagonal and includes a plurality of substantially flat inward surfaces 721a, 721b, 721e, 721f, 721g (not all eight surfaces are shown in the cross-sectional view of FIG. 7B). . These surfaces 721a, 721b, 721e, 721f, 721g may correspond to some of each outwardly facing surface 202 of the front portion 205 of the adapter 102. As described above, some surfaces 202 of the front portion 205 can be mating surfaces, while some can be non-matching surfaces. Each mating surface of adapter 102 may match each mating surface of cavity 702, while each non-matching surface of adapter 102 may have a slightly different shape than each non-matching surface of cavity 702, or cavity 702 Can be offset from each non-matching surface.

  The middle portion 724 includes a plurality of substantially flat inward surfaces 723a, 723b, 723e, 723f, 723g (not all surfaces are shown in the cross-sectional view of FIG. 7B). These surfaces 723a, 723b, 723e, 723f, 723g may correspond to some of each outwardly facing surface 216 of the intermediate portion 209 of the adapter 102. In particular, each mating surface of adapter 102 may match each mating surface of cavity 702, while each non-matching surface of adapter 102 may have a slightly different shape than each non-matching surface of cavity 702 Or offset from each non-matching surface of the cavity 702.

  The rear portion 722 includes an octagonal shape and a plurality of substantially flat inwardly facing surfaces 704a, 704b, 704c, 704d, 704e, 704f, 704g, 704h (some surfaces are shown in FIGS. 8A and 8B). Even better). These surfaces include an upper inner surface 704e and a lower inner surface 704g (separated vertically), side surfaces 704f, 704h separated horizontally, upper angled inner surfaces 704a, 704c, and lower Includes side angled inner surfaces 704b, 704g. These surfaces 704a, 704b, 704c, 704d, 704e, 704f, 704g, 704h may correspond to each outwardly facing surface 204 of the front portion 207 of the adapter 102. Specifically, each mating surface of the adapter 102 may match each mating surface of the cavity 702, while each non-matching surface of the adapter 102 may have a slightly different shape than each non-matching surface of the cavity 702, Alternatively, it can be offset from each non-matching surface of the cavity 702.

  The cavity 702 includes an upper inward surface 704e designed to mate with the upward surface 204e of the nose 203. In some embodiments, the upper inward surface 204e can be substantially flat. The upper inward surface 704e also includes an upper protrusion 706 extending therefrom. The upper protrusion 706 may also be described as an inwardly projecting bearing surface portion 706 because it protrudes inwardly toward the wear member 104 and the longitudinal axis 718 of the cavity 702. Upper inwardly projecting bearing surface portion 706 is sized and shaped to conform to concave bearing surface portion 210 of nose 203. Similarly, the cavity includes a lower inward surface 704g designed to mate with the downward surface 204g of the nose 203. The lower inward surface 704g also includes an inwardly projecting carrying surface portion 707. The cavities also include other surfaces that are collocated with the surfaces 202, 204 of the nose 203. The inner carrying surface portions 706, 707 are convex and are arranged to support the load imposed in the vertical direction at the tip.

  The protrusions 706, 707 can be centrally disposed on their respective surfaces 704e, 704g. Thus, the protrusions 706, 707 can be localized by the flat portions of the surfaces 704e, 704g. Additionally, the protrusions 706, 707 can be offset from each other if the corresponding carrying surface portions 210, 213 of the nose 203 are offset from each other. Both the upper protrusion 706 and the lower protrusion 706 may form a cross-sectional arc having a tangent at an angle of inclination. In some embodiments, there may be only one protrusion 706 on the upper surface 704 and only one protrusion 707 on the lower surface 704g. However, in some embodiments, there may be additional protrusions on each surface 704e, 704g.

  In this embodiment, the surfaces of the protrusions 706, 707 can act as a carrying surface that abuts the carrying surface portions 210, 213 of the adapter nose 203. Thus, the interference specific structure comprising the protrusions 706, 707 and the carrying surface portions 210, 213 may provide additional support for loads in various directions. Furthermore, due to their curved nature, each protrusion and each depression provides lateral stability and acts as a bearing surface in the vertical direction.

  Cavity 702 may also include a hole 725 that aligns with hole 206 when wear member 104 is mounted on adapter 102. With such an alignment, the locking pin can be inserted therethrough. In some embodiments, the wear member 104 may include a single hole on one side of the cavity, and in some embodiments, the wear member 104 has two holes, one on each side of the cavity 702. Can be included.

  Cavity 702 also includes inward twist control surfaces 727a, 727c. In FIG. 10, twist control surfaces 727b, 727d are shown. Inward torsion control surfaces 727a, 727b, 727c, 727d are sized and shaped to abut and conform to the outward torsion control features 230a, 230b, 230c, 230d of the adapter nose.

  8 and 9 are cross-sectional views in the lateral direction of the tooth portion provided with the protruding portion. FIG. 8 shows the inner walls 704e, 704g spaced apart in the vertical direction, corresponding to the walls 204e, 204g of the nose 203. FIG. FIG. 8 also shows inner walls 704f and 804h that are spaced apart in the horizontal direction and that correspond to the walls 204f and 204h of the nose 203. FIG. 8 also shows laterally angled inwardly facing walls 704a, 704b, 704c, 704d corresponding to the outwardly laterally angled walls 204a, 204b, 204c, 204d of the nose 203. ing.

  FIG. 10 is a rear view of the tooth portion as viewed into the cavity 702. When viewed in the cavity, the surfaces 721a, 721b, 721c, 721d, 721e, 721f, 721g, and 721h of the front portion 720 of the cavity 702 can be viewed. In addition, the surfaces 723a, 723b, 723c, 723d, 723e, 723f, 723g, 723h of the intermediate portion 724 of the cavity 702 can also be viewed. Furthermore, the surfaces 704a, 704b, 704c, 704d, 704e, 704g and the protrusions 706, 707 can be seen.

  The concave bearing surface portions 210, 213 and the protrusions 706, 707 are substantially elliptical in shape, but some embodiments may have polygonal shaped carrier surface portions and protrusions. . In some embodiments, each carrier surface portion may be mounted on a side surface near or adjacent to holes 206, 711 through which the locking pins are inserted. Since the protrusions 706, 707 are sized and shaped to match the size and shape of the concave carrying surface portion, either description applies equally to the other.

  Although a depression on adapter 102 has been described and a protrusion on the inner surface of wear member 104 has been described, some embodiments deploy a protrusion on adapter 102 and a depression on wear member 104. It should be noted that the arrangement is reversed as much as possible.

  The present disclosure also relates to a wear member assembly that digs into the ground, including an adapter nose that can be secured to the bucket lips and teeth. The nose includes an angled bearing surface positioned to be received within the tooth cavity. The cavity includes a carrying surface corresponding to and engaging with each carrying surface of the nose. According to some embodiments, the adapter nose may include a front portion at the distal end of the nose and a rear portion at the proximal end of the nose. The rear portion may include eight substantially flat surfaces that converge toward the longitudinal axis of the nose. The front portion may also include eight substantially flat surfaces that converge toward the longitudinal axis of the nose but converge at a shallower angle. Thus, in some embodiments, both the front portion and the rear portion have a substantially octagonal cross section. In some embodiments, in the rear portion, each horizontal and vertical surface of the octagonal cross section can be an unsupported surface and angled (e.g., non-horizontal and non-vertical surfaces, etc.). The surface can be a support surface. In the front part, each angled surface can also be a carrying surface.

  FIG. 11A is an exploded perspective view of the wear member assembly 10 that digs into the ground. According to this embodiment, the wear member assembly 10 includes a nose 1100 and a wear member 1200. An exemplary embodiment of the wear member 1200 is a tooth portion 1200. In another embodiment, the wear member 1200 is an intermediate adapter. Other wear members are contemplated. The nose 1100 includes a front portion 1124 and a rear portion 1122. In the illustrated embodiment, the nose 1100 is a basic structure shown as a block, but similar to the adapter 102 in FIG. 1, the nose 1100, such as a bucket receiving portion having a bifurcated adapter leg. Extends from the basic structure to represent any additional mounting structure that provides support. In some embodiments, the nose can be secured to the bucket lip of the excavator. The nose may form part of an adapter or intermediate adapter and may also be referred to herein as a support structure, since it is an additional component that in this embodiment is a tooth 1200 This is because it provides stabilization support for the above. The nose 1100 also includes a hole 12 for receiving a locking pin. In this embodiment, the nose includes a torsion control specific structure 18. The tooth portion 1200 also includes a hole 14 through which a locking pin can be inserted. The details of the locking pins are not included here because a number of known locking pins can be employed. Tooth 1200 also includes a rearward cavity (not shown in FIG. 11A) and a ground biting end as tip 16. An axis 1105 extends through the wear member assembly 10.

  FIG. 11B shows an overview of the nose 1100 as viewed along the longitudinal axis 1105 of the nose 1100. FIG. 11C shows a side view of the nose 1100 as viewed along the transverse axis 1107. The transverse axis 1107 is aligned at a position that extends parallel to the edge of the bucket lip (not shown). As described above, the nose 1100 can be secured to the bucket lip and includes a front portion 1124 and a rear portion 1122. The rear portion 1122 includes a group of eight substantially flat surfaces. In particular, the group includes a subset having a top surface 1108a and a bottom surface 1108b, a subset of two side surfaces 1106a, 1106b, and a subset of four angled surfaces 1110a, 1110b, 1110c, 1110d. . The top and bottom surfaces can be referred to as horizontal surfaces and each side surface can be referred to as a vertical surface because such surfaces are horizontal and vertical in cross section. The four angled surfaces 1110a, 1110b, 1110c, 1110d may be bearing surfaces arranged to contact and cooperate with each surface of the tooth portion 1200. Since each bearing surface is angled, each bearing surface can withstand both horizontal and vertical loads. Each angled surface may also be referred to as a diagonal or inclined surface. Both horizontal surfaces 1108a, 1108b and vertical surfaces 1106a, 1106b can be unsupported surfaces.

  In this exemplary embodiment, each of the eight substantially flat surfaces converges toward the longitudinal axis 1105 of the nose 1100. In some embodiments, the angles of the eight substantially flat surfaces with respect to the longitudinal axis 1105 can be in the range of about 5-25 degrees. In some embodiments, the angle can be in the range of about 8-15 degrees. Other ranges are also contemplated. In this embodiment, the top and bottom surfaces 1108a, 1108b may be wider than the side surfaces 1106a, 1106b. Therefore, the octagonal cross section may have different height 1134 and width 1132. This aids torsion control and stability.

  In the exemplary embodiment shown, the front portion 1124 also includes a group of eight substantially flat surfaces. In particular, the group comprises a subset having a top surface 1114a and a bottom surface 1114b, a subset of two side surfaces 1112a, 1112b, and a subset of four angled bearing surfaces 1116a, 1116b, 1116c, 1116d. Including. The four angled surfaces 1116a, 1116b, 1116c, 1116d can be bearing surfaces arranged to contact and cooperate with each surface of the tooth portion 1200. Since each bearing surface is angled, each bearing surface can withstand both horizontal and vertical loads. The top and bottom surfaces 1114a, 1114b can also be unsupported surfaces. In some embodiments, the side surfaces 1112a, 1112b can be support surfaces. However, in some embodiments, the side surfaces 1112a, 1112b can be unsupported surfaces. In some embodiments, each unsupported surface of the front portion 1124 or the back portion 1122 may not be substantially flat.

  In some embodiments, each of the eight substantially flat surfaces of the front portion 1124 is shallower than the angle at which the eight substantially flat surfaces of the rear portion 1122 converge toward the longitudinal axis 1105. And converge toward the longitudinal axis 1105 of the nose 1100. In some embodiments, the angle of the eight substantially flat surfaces of the front portion 1124 with respect to the longitudinal axis 1105 can be in the range of about 0-15 °. In some embodiments, the angle can be in the range of about 1-8 °. Additionally, the top and bottom surfaces 1114a, 1114b can be wider than the side surfaces 1112a, 1112b. Therefore, the octagonal cross section differs in height 1134 and width 1132. This also supports stability and torsion control. In some embodiments, the ratio of the width of the top or bottom surface to the width of the side surface in the front portion 1124 is different than in the rear portion 1122. For example, the ratio of the top or bottom surface width to the side surface width in the front portion 1124 can be greater than in the rear portion 1122.

  FIG. 12A shows an overview of the tooth portion 1200 viewed into the cavity 1205. 12B is a cross-sectional view of tooth portion 1200 along longitudinal axis 1105 broken along line 12B-12B in FIG. 12A. The cavity 1205 is formed at the rear end portion 1209 of the tooth portion 1200 and extends inward in the longitudinal direction from the rear end portion 1204. Cavity 1205 has a plurality of support surfaces that contact and couple to each support surface of nose 1100. It also has a reference longitudinal axis 1105 and a transverse axis 1107. The cavity 1205 also includes a front portion 1224 and a rear portion 1222. The rear portion 1222 includes a group of eight substantially flat surfaces. Thus, in this exemplary embodiment, the group of substantially flat surfaces includes a subset having a top surface 1208a and a bottom surface 1208b, a subset of two side surfaces 1206a, 1206b, and four angled surfaces. And a subset of surfaces 1210a, 1210b, 1210c, 1210d. The four angled surfaces 1210a, 1210b, 1210c, 1210d can be support surfaces. Since each bearing surface is angled, each bearing surface can withstand both horizontal and vertical loads that can be applied to the teeth 1200 during use. Both the top and bottom surfaces 1208a, 1208b and the side surfaces 1206a, 1206b can be unsupported surfaces. In some embodiments, each unsupported surface may not be substantially flat. For example, each unsupported surface can be curved.

  The front portion 1224 also includes a group of eight substantially flat surfaces on the front side. In particular, the front group comprises a subset having a top surface 1214a and a bottom surface 1214b, a subset of two side surfaces 1212a, 1212b, and a subset of four angled surfaces 1216a, 1216b, 1216c, 1216d. Including. The four angled surfaces 1216a, 1216b, 1216c, 1216d can be support surfaces. Again, since each bearing surface is angled, each bearing surface can resist both horizontal and vertical loads. The horizontal surfaces 1214a, 1214b can also be unsupported surfaces. In some embodiments, the vertical surfaces 1212a, 1212b can be support surfaces. However, in some embodiments, the vertical surfaces 1212a, 1212b can be unsupported surfaces.

  Referring now to FIG. 11C, the nose 1100 includes a rear surface 1101 and a front octagonal contact surface 1118. The front abutment surface 1118 can have an octagonal shape. The front abutment surface 1118 can be a mating surface because it is designed to contact the front abutment surface 1218 of the cavity 1205 (shown in FIGS. 12A and 12B). The front abutment surface 1218 of the cavity 1205 can also have an octagonal shape. The rear surface 1201 at the rear end 1109 of the tooth portion 1200 may or may not contact the rear surface 1101 of the nose 1100.

  In some embodiments, the nose 1100 and the teeth 1200 can be designed symmetrically so that the teeth can be rotated 180 ° and still fit properly over the teeth. Thus, the tooth portion 1200 is allowed to be reversed after a certain period of wear. The teeth 1200 can then continue to be used in the inverted position. Thereby, the lifetime of the tooth part 1200 is extended.

  FIG. 13 is a perspective view of the nose 1100. In addition to the substantially flat surfaces 1106a, 1106b, 1108a, 1108b, 1110a, 1110b, 1110c, 1110d, 1112a, 1112b, 1114a, 1114b, 1116a, 1116b, 1116c, 1116d, both the front portion 1124 and the rear portion 1122 Can have curved surfaces positioned between each flat surface. In an embodiment having a rear surface 1101, nose 1100 extends from rear surface 1101 to eight substantially flat surfaces 1106a, 1106b, 1108a, 1108b, 1110a, 1110b, 1110c, 1110d of rear portion 1122. Each surface 1302 disposed between and transitioning may be included. The nose 1100 also includes flat surfaces 1106a, 1106b, 1108a, 1108b, 1110a, 1110b, 1110c, 1110d, 1112a, 1112b, 1114a, 1114b, 1116a, 1116b, 1116c, 1116c on both the front portion 1124 and the rear portion 1122. An elongate curved surface 1304 between each adjacent edge may also be included. The nose 1100 may also include a curved surface 1306 positioned between the flat surfaces 1106a, 1106b, 1108a, 1108b, 1110a, 1110b, 1110c, 1110d of the rear portion 1122, and each flat surface of the front portion 1124. The nose 1100 may also include a curved surface 1308 positioned between the front abutment surface 1118 and the flat surfaces 1112a, 1112b, 1114a, 1114b, 1116a, 1116b, 1116c, 1116d of the front portion 1124. In some embodiments, these curved surfaces can be fillets or circles intended to minimize positional stress during use. Each curved surface may also assist in providing clearance for the wear member cavity.

  In some embodiments, at the distal end 1307 of the rear portion 1122, the cross-sectional width W1 of the top and bottom unsupported surfaces 1108a, 1108b is different from the cross-sectional width W3 at the proximal end 1305 of the rear portion 1122. For example, the cross-sectional width W1 of the top and bottom unsupported surfaces 1108a, 1108b at the distal end 1307 of the rear portion 1122 can be smaller than the cross-sectional width W3 at the proximal end 1305 of the rear portion 1122, and vice versa. is there. Furthermore, the cross-sectional width W2 of the support surfaces 1110a, 1110b, 1110c, 1110d at the distal end 1307 of the rear portion 1122 can be different from the cross-sectional width W4 at the base end 1305. For example, the cross-sectional width W2 of the carrying surfaces 1110a, 1110b, 1110c, 1110d at the distal end 1307 of the rear portion 1122 can be smaller than the cross-sectional width W4 at the proximal end 1305, and vice versa. Further, the cross-sectional width W1 of the top and bottom surfaces 1108a, 1108b at the end 1307 of the rear portion 1122 can be different from the cross-sectional width W2 of the support surfaces 1110a, 1110b, 1110c, 1110d at the end 1307 of the rear portion 1122. For example, the cross-sectional width W1 of the top and bottom surfaces 1108a, 1108b at the end 1307 of the rear portion 1122 is smaller than the cross-sectional width W2 of the support surfaces 1110a, 1110b, 1110c, 1110d at the end 1307 of the rear portion 1122 And vice versa. Further, the cross-sectional width W3 of the top and bottom surfaces 1108a, 1108b at the base end 1305 of the rear portion 1122 can be different from the cross-sectional width W4 of the carrying surfaces 1110a, 1110b, 1110c, 1110d at the base end 1305 of the rear portion 1122. For example, the cross-sectional width W3 of the top and bottom surfaces 1108a, 1108b at the base end 1305 of the rear portion 1122 is larger than the cross-sectional width W4 of the support surfaces 1110a, 1110b, 1110c, 1110d at the base end 1305 of the rear portion 1122 And vice versa.

  FIG. 14A shows an overview of an exemplary adapter nose 1400 with torsion control features 1402a, 1402b, 1402c, 1402d that resists the torsional motion of the wear member 1200 with respect to the nose 1100. FIG. FIG. 14B shows a side view of an adapter nose 1400 with a torsion control specific structure. FIG. 14C is a perspective view of an adapter nose 1400 with a torsion control specific structure. FIG. 14D is a plan view of an adapter nose 1400 with torsion control. In the exemplary embodiment shown, adapter nose 1400 includes an angled bearing surface as described with respect to FIGS. 11A, 11B, 11C, and 13. For convenience, these bearing surfaces will not be described again with respect to FIGS. 14A, 14B, 14C, and 14D. The torsion control specific structures 1402a, 1402b, 1402c, and 1402d include protrusions extending from the nose 1400. Each of the torsion control features includes a vertical, flat outward surface 1404a, 1404b, 1404c, 1404d. The torsion control specific structures 1402a, 1402b, 1402c, 1402d are located in the vicinity of the rear end portion of the adapter nose 1400. The torsion control features 1402a, 1402b, 1402c, 1402d are also positioned such that the vertical surfaces 1404a, 1404b, 1404c, 1404d intersect the angled bearing surfaces 1110a, 1110b, 1110c, 1110d of the nose 1400. As shown in FIG. 14D, the vertical surfaces 1404a, 1402b, 1402c, 1404d are tapered toward the longitudinal axis. Thereby, the tooth part 1200 can be removed from the nose 1100 more easily.

  As best seen in the side view of FIG. 14B, the torsion control features 1402a, 1402b, 1402c, 1402d are contained within the boundaries created by the flat surfaces 1108a and 1108b. In the preferred embodiment shown, adapter nose 1400 includes torsion control features 1402a, 1402b disposed on the upper portion and torsion control features 1402c, 1402d disposed on the lower portion. . In some embodiments, the adapter nose 1400 includes a torsion control feature on only one of the upper or lower portions. Similarly, in the illustrated embodiment, the twist control feature 1402a, 1402b is shown aligned perpendicular to the twist control feature 1402c, 1402d. In some embodiments, each torsion control feature is not vertically aligned.

  FIG. 15 shows a tooth 1500 having a cavity 1505 designed to mate with an adapter nose, such as an adapter nose 1400 with a torsion control feature such as torsion control features 1402a, 1402b, 1402c, 1402d. FIG. The cavity 1505 may include a predetermined number of pockets 1502a, 1502b, 1502c, 1502d. The pockets 1502a, 1502b, 1502c, 1502d may be designed to receive the torsion control specific structure 1402a, 1402b, 1402c, 1402d of the adapter nose 1400. In the exemplary embodiment shown, the pockets 1502a, 1502b, 1502c, 1502d are vertical flat inward surfaces 1504a, 1504b, 1504c, 1504d corresponding to the vertical surfaces 1404a, 1404b, 1404c, 1404d of the adapter nose 1400. including. Thus, the vertical surfaces 1404a, 1404b, 1404c, 1404d of the nose 1400 engage the vertical surfaces 1504a, 1504b, 1504c, 1504d of the teeth 1500 to resist twisting between the nose 1400 and the teeth 1500 and Designed for contact bonding. Tooth 1500 may have a flat bearing surface that is in contact with each flat bearing surface of adapter nose 1400, as shown with respect to FIGS. 12A and 12B.

  FIG. 16A shows a cross section of the adapter nose 1100 that is orthogonal to the longitudinal axis (eg, 1105 in FIG. 11B) in the assembled state. Accordingly, FIG. 16A also shows a cross section of the tooth portion 1200. As shown, the angled bearing surfaces 1110a, 1110b, 1110c, 1110d of the nose 1100 abut and match the angled bearing surfaces 1210a, 1210b, 1210c, 1210d of the tooth portion 1200. These angled bearing surfaces minimize or prevent both vertical and lateral movement of the teeth 1200 relative to the adapter nose 1100. In some embodiments, there may be a gap between the nose horizontal unsupported surfaces 1108a, 1108b and the horizontal unsupported surfaces 1208a, 1208b of the teeth 1200. Similarly, there may be a gap between the nose vertical unsupported surfaces 1106a, 1106b and the vertical unsupported surfaces 1206a, 1206b of the tooth portion 1200. However, in some embodiments, each unsupported surface of both the nose 1100 and the tooth portion 1200 can contact when the tooth portion 1200 is fitted to the nose. Because of each angled bearing surface, both vertical and lateral movement can be minimized.

  FIG. 16B shows a cross section orthogonal to the longitudinal axis of the adapter nose 1400 with the torsion control feature. As described above, the vertical surfaces 1404a, 1404b, 1404c, 1404d of the nose 1400 abut against and match the vertical surfaces 1504a, 1504b, 1504c, 1504d of the tooth 1500. Thus, the torsion control specific structures 1402a, 1402b, 1402c, 1402d are arranged to resist torsional motion and torsion between the nose 1400 and the tooth 1500. This may help stabilize the tooth 1500 on the adapter nose 1400 during use.

  FIG. 16C shows a cross section of the front portion of adapter nose 1100. FIG. 16C also shows a cross section of the tooth portion 1200. As shown, the angled bearing surfaces 1116a, 1116b, 1116c, 1116d of the nose 1100 abut against and match the angled bearing surfaces 1216a, 1216b, 1216c, 1216d of the tooth portion 1200. In some embodiments, there may be a gap between the horizontal no-carrying surface 1114a, 1114b of the nose and the horizontal non-carrying surface 1214a, 1214b of the tooth 1200. In the present embodiment, the vertical surfaces 1112a and 1112b of the nose 1100 and the vertical surfaces 1212a and 1212b of the tooth portion 1200 are carrying surfaces, so there is no gap between them. However, in some embodiments, there may be a gap between the vertical surfaces 1112a, 1112b of the nose 1100 and the vertical surfaces 1212a, 1212b of the teeth 1200. In this exemplary embodiment, the angled bearing surfaces 1116c and 1116d are adjacent to the bottom surface 1114b of the adapter nose 1100, but do not form a portion thereof. This angled design may extend the useful life of the adapter nose 1100 in some cases. During use, it is not uncommon for an operator to wear the bottom portion of the tooth and accidentally expose and wear the bottom surface of the adapter nose 1100. Such can adversely affect the stability of subsequent teeth mounted on the adapter nose in a customary system that utilizes the bottom surface of the adapter nose as a bearing surface. A worn carrier surface introduces rocking and can further accelerate wear and possibly permanently damage the adapter nose. However, the exemplary embodiments disclosed herein include a support surface on an angled bottom surface rather than on a horizontal bottom surface. Thus, even if the operator inadvertently wears a portion of the adapter nose bottom surface, each angled bearing surface still provides stability to the teeth in both the horizontal and vertical directions. Can be provided. This can extend the useful life of the adapter nose since the teeth can be properly supported even by the worn bottom surface of the adapter nose.

  FIG. 16D shows a cross section of an adapter nose 1450 with an offset torsion control feature. For example, surface 1454a is offset from surface 1454c. Similarly, surface 1454b is offset from surface 1454d. The tooth 1550 includes corresponding surfaces 1554a, 1554b, 1554c, 1554d. Each offset is such that the tooth 1550 can still be inverted and inverted and fit into the nose 1450. In other words, the teeth can engage the adapter nose 1450 at two rotational positions.

  Although described as having eight flat surfaces, some embodiments of the adapter nose and teeth described herein have four angled flat surfaces and less than four flat surfaces. Includes vertical or horizontal surfaces. In some embodiments, the adapter nose and teeth described herein include a rounded or arcuate outer surface that connects two adjacent flat angled surfaces. For example, some embodiments do not include a vertical side and comprise a round portion connecting adjacent surfaces 106a and 1106b. In these embodiments, surfaces 1106a and 1106b can be replaced by round surfaces connecting flat support surfaces 1110a and 1110c. The teeth can be formed to match. In some embodiments, the adapter nose may be formed with eight flat surfaces, but the tooth cavity, such as cavity 1205, may be formed with only six flat surfaces. In some embodiments, the vertical surfaces 1206a and 1206b described herein can be rounded while the cavity 1205 still engages and mates with the flat angled bearing surface of the adapter nose. It can be formed accordingly.

  US Provisional Patent Application No. 62 / 441,756 filed January 3, 2017, entitled “Connector with Clamping Spring for Wear Member Assembly that Grows into the Ground” and May 12, 2016 U.S. Provisional Patent Application No. 62 / 335,424 filed in the name of "Fasteners for Wear Member Assemblies" is hereby incorporated by reference in its entirety.

  One skilled in the art will appreciate that the embodiments encompassed by the present disclosure are not limited to the specific exemplary embodiments described above. In that regard, although exemplary embodiments have been shown and described, a wide range of alterations, modifications, combinations, and substitutions are contemplated in the above disclosure. It is understood that such changes can be made to the above content without departing from the scope of the present disclosure. Accordingly, it is appropriate that the appended claims be construed broadly and in a manner consistent with the present disclosure.

10 Wear member assembly that bites into the ground
12 holes
14 holes
16 Tip
18 Torsion control specific structure
100 Wear member assembly that cuts into the ground
102 adapter
104 Tooth / Wear
106 Locking pin
201 Front end
202 Front / outward surface
202a Front angled surface
202b Front angled surface
202c angled surface
202d angled surface
202e Top / Horizontal surface
202f vertical surface
202g Bottom / Horizontal surface
202h vertical surface
203 Adapter Nose
204 outward / rear surface
204a Angled rear surface
204b Rear angled surface
204c outward angled surface
204d outward angled surface
204e upward top surface
204f Vertical / side surface
204g Bottom / down-facing surface
204h Vertical surface / Side surface
205 Front part
207 Rear part
209 Middle part
210 Top concave support surface
211 Long axis
212 Rear edge
213 Lower concave support surface
215 Horizontal axis
216 outward facing surface
216b angled surface
216c angled surface
216d angled surface
216e top surface
216f Bottom facing surface
220 forward end surface
230a Torsion control surface
230b Torsion control surface
230c Torsion control surface
230d twist control surface
702 cavity
704 Upper surface
704a Angled inside surface
704b Angled inside surface
704c Angled inside surface
704d angled inside surface
704e Upper inner surface
704f Side surface
704g lower inner surface
704h Side surface
706 Upper inwardly protruding support surface
707 Inward protruding support surface
708 Tip
711 holes
718 Longitudinal axis
720 front part
721a Angled support surface
721b Angled support surface
721c Angled support surface
721d angled support surface
721e Unsupported surface
721f Unsupported surface
721g Unsupported surface
721h Unsupported surface
722 Rear part
723a Angled support surface
723b Angled support surface
723c angled support surface
723d angled support surface
723e surface
723f surface
724 Middle part
727a Inward twist control surface
727b Inward twist control surface
727c Inward twist control surface
727d Inward twist control surface
731 Wear indicator
1100 adapter nose
1105 Longitudinal axis
1106a Side surface / vertical surface
1106b Side / Vertical surface
1108a Top surface
1108b Bottom surface
1110a Angled support surface
1110b Angled support surface
1110c Angled support surface
1110d angled support surface
1112a Side / vertical surface
1112b Side / Vertical surface
1114a Top surface
1114b Bottom surface
1116a Angled support surface
1116b Angled support surface
1116c Angled support surface
1116d angled support surface
1118 Front octagonal contact surface
1122 Rear part
1124 Front part
1132 width
1134 height
1200 Wear parts / tooth
1205 cavity
1206a Side / vertical surface
1206b Side / Vertical surface
1208a Top surface
1208b Bottom surface
1210a Angled support surface
1210b Angled support surface
1210c angled support surface
1210d angled support surface
1212a Side / Vertical surface
1212b Side / Vertical surface
1214a Top surface
1214b Bottom surface
1216a Angled support surface
1216b Angled support surface
1216c angled support surface
1216d angled support surface
1304 Long curved surface
1306 Curved surface
1400 adapter nose
1402a Torsion control specific structure
1402b Torsion control specific structure
1402a, 1402b, 1402c, 1402d Torsion control specific structure
1402c Torsion control specific structure
1404d Vertical flat outward / vertical surface
1450 adapter nose
1454a surface
1454b surface
1454c surface
1454d surface
1500 teeth
1502a pocket
1502b pocket
1502c pocket
1502d pocket
1504a Vertical flat inward / vertical surface
1504b Vertical flat inward / vertical surface
1504c Vertical flat inward / vertical surface
1504d Vertical flat inward / vertical surface
1505 cavity
1550 tooth

Claims (50)

In the nose that can be attached to the bucket lip,
A rear portion having a first group of eight surfaces converging toward the distal end of the rear portion and toward the longitudinal axis of the nose, wherein the substantially flat surface of the first group is
A surface of a first subset having a top and bottom surface;
A second subset having each side surface;
A surface of a third subset comprising each carrying surface, wherein the surface of the third subset is angled and located between the surface of the first subset and the surface of the second subset A rear portion comprising a surface;
A front portion located in front of the rear portion, the front portion having a second group of eight surfaces converging towards the longitudinal axis of the nose towards the end of the front portion The surface of the second group is
A fourth subset having top and bottom surfaces;
A fifth subset having each side surface;
A surface of a sixth subset comprising each bearing surface, the angle being angled and located between the surface of the first subset and the surface of the second subset; A nose comprising a front portion, comprising a surface,
A wear member having a cavity that opens toward a rear end, the cavity comprising rear and front bearing surfaces corresponding to the surface of the third subset and the surface of the sixth subset. A wear member assembly comprising a wear member.   The wear member assembly of claim 1, wherein the surface of the third subset and the surface of the sixth set are arranged to withstand horizontal and vertical loads.   The wear member assembly of claim 1, further comprising a forward-facing octagonal abutment surface at a distal end of the nose.   The wear member assembly of claim 1, wherein a surface of the first subset is longer than a surface of the second subset in a direction perpendicular to the longitudinal axis.   The wear member assembly of claim 1, wherein a surface of the fourth subset is longer than a surface of the second subset in a direction perpendicular to the longitudinal axis.   The wear member assembly of claim 1, further comprising a group of four protrusions extending from a surface of the third subset.   The wear member assembly of claim 6, wherein the protrusion has an outward vertical surface arranged to resist torsional motion of the wear member.   The wear member assembly of claim 6, wherein each of the protrusions is aligned with each other.   The wear member assembly of claim 6, wherein two of the protrusions are offset from the other two protrusions such that the wear member is engageable with the nose in two rotational positions.   The wear member assembly of claim 1, further comprising a curved surface positioned between each of the surfaces in the first group of surfaces.   The wear member assembly of claim 1, wherein the second group of eight surfaces have a shallower angle with respect to the longitudinal axis than the first group of eight surfaces. A nose having a front portion and a rear portion, the rear portion having eight surfaces of octagonal configuration, each of the surfaces of the rear portion being at the end of the rear portion of the nose Converging toward the longitudinal axis, the front portion has eight substantially flat surfaces, each of the front portion surfaces converging toward the longitudinal axis at the end of the front portion and the rear Both the horizontal and vertical surfaces of the side portions are unsupported surfaces;
A wear member having a distal end for biting into the ground and a proximal end having a cavity, the cavity comprising front and rear portions having respective surfaces corresponding to the front and rear portions of the nose A wear member having
A wear member assembly comprising:   The wear member assembly of claim 12, wherein each angled surface of both the rear portion and the front portion of the nose is a bearing surface positioned to resist horizontal and vertical loads.   The wear member assembly of claim 12, wherein an edge between each surface of both the rear portion and the front portion is beveled.   The wear member assembly of claim 12, further comprising a group of four protrusions extending from each angled surface of the rear portion.   The wear member assembly of claim 15, wherein each protrusion has an outward side surface disposed to resist torsional motion of the wear member.   The wear member assembly of claim 15, wherein each of the protrusions is aligned with one another.   The wear member assembly of claim 15, further comprising a curved surface positioned between the front portion and the rear portion. A cavity,
A rear portion having a first group of eight surfaces converging toward a longitudinal axis at a first average angle toward the distal end, the eight surfaces of the first group being
Top and bottom surfaces;
A group of side surfaces;
A rear portion comprising a group of angled surfaces comprising a bearing surface;
A front portion positioned in front of the rear portion, the front portion having a second group of eight surfaces converging at a second average angle smaller than the first average angle toward the longitudinal axis; ,
A wear member comprising a cavity having a group of pockets positioned at least partially along each diagonal surface and having a group of inwardly facing vertical surfaces.   The wear member according to claim 19, wherein the ratio of the width to the height of the cross section of the rear portion is smaller than the ratio of the width to the height of the cross section of the front portion.   The wear member of claim 19, wherein the front portion comprises four angled bearing surfaces. An adapter nose,
A rear portion having a cross-sectional width and a cross-sectional height, wherein the cross-sectional width is different from the cross-sectional height, the rear portion having two unsupported surfaces and four substantially flat support surfaces; The two unsupported surfaces are substantially horizontal in cross section and the four substantially flat support surfaces are inclined in cross section;
A first two of the four substantially flat carrying surfaces are disposed on a first lateral side of the two non-bearing surfaces, and the four substantially flat carrying surfaces An inner second two surfaces disposed on a second lateral side of the two substantially flat unsupported surfaces, and at either end of the rear portion, any of the two unsupported surfaces A wear member assembly comprising an adapter nose having a rear portion, the cross-sectional width of which is different from the cross-sectional width of any of the four substantially bearing surfaces. The adapter nose includes a front portion extending forward from the rear portion and having a cross-sectional width and a cross-sectional height, and the cross-sectional width of the front portion is different from the cross-sectional height of the front portion. The front portion has a front abutment surface and two unsupported surfaces and four substantially flat support surfaces, the two unsupported surfaces being substantially horizontal in cross section and the The four substantially flat support surfaces are inclined in cross section,
23. The wear of claim 22, wherein at the end of the front portion, the cross-sectional width of either of the two non-supporting surfaces is different from the cross-sectional width of any of the four substantially support surfaces. Member assembly.   23. The wear member assembly of claim 22, wherein the rear portion comprises two additional surfaces that form a substantially vertical side surface. A cavity having a rear portion and a front portion, the rear portion having a cross-sectional width and a cross-sectional height, the cross-sectional width being different from the cross-sectional height, the cavity comprising two unsupported surfaces and 4 Two substantially flat bearing surfaces, the two non-bearing surfaces being substantially horizontal in cross section, and the four substantially flat bearing surfaces being inclined in cross section;
A first two of the four substantially flat bearing surfaces are disposed on a first lateral side of the two non-bearing surfaces and the four substantially flat bearings A second two of the surfaces are disposed on a second lateral side of the two unsupported surfaces and at one end of the rear portion, one of the two unsupported surfaces. A wear member comprising a cavity having a cross-sectional width that is different from a cross-sectional width of any of the four substantially flat support surfaces. The front part of the cavity extends forward from the rear part and has a cross-sectional width and a cross-sectional height, and the cross-sectional width of the front part is different from the cross-sectional height of the front part, The front portion has a front abutment surface and two unsupported surfaces and four substantially flat support surfaces, the two unsupported surfaces being substantially horizontal in cross section and the 4 Two substantially flat support surfaces are inclined in cross section,
26. At the end of the front portion, the cross-sectional width of either of the two non-supporting surfaces is different from the cross-sectional width of any of the four substantially flat support surfaces. Wear parts.   26. A wear member according to claim 25, wherein the rear portion of the cavity comprises two additional unsupported side surfaces. A hollow ground biting wear member attachable to the support structure,
The wear member includes a front end portion arranged to bite into the ground and a rear end portion having a cavity formed therein, the cavity having an inner surface and having an axis extending in a longitudinal direction. The cavity has a front portion and a rear portion adjacent to the rear end;
The inner side surface has inner walls facing each other in the horizontal direction, and the inner side surface has inner walls facing each other in the vertical direction forming an upper inner side surface and a lower inner side surface,
The upper inner surface and the lower inner surface each have a centrally disposed inwardly projecting inwardly carrying surface portion disposed to provide a bearing conformity to the support structure, each inward A projecting carrying surface portion is disposed in the rear portion of the cavity, the inward projecting carrying surface portion comprises a lateral width that is less than a longitudinal length, and the support structure Receivable in a depression, the inwardly projecting bearing surface portion is arranged to support a load imposed in a vertical direction at the tip,
Wear member.   29. A wear member according to claim 28, wherein each protruding carrying surface portion forms a cross-sectional arc having a tangent at an angle of inclination.   29. The wear member of claim 28, wherein the upper inner surface and the lower inner surface each have only a single carrying surface portion that is centrally disposed and projects inwardly.   29. The wear member of claim 28, further comprising a pair of holes disposed in each of the horizontally spaced opposing inner walls to receive a locking pin.   32. The wear member of claim 31, wherein the inwardly projecting carrying surface of the upper inner surface and the inward projecting carrying surface of the lower inner surface are located at least partially behind the pair of holes. .   29. The wear member of claim 28, wherein the inwardly projecting bearing surface of the upper inner surface is longitudinally aligned with the inwardly projecting bearing surface of the lower inner surface.   29. The wear member of claim 28, wherein the inwardly projecting carrying surface of the upper inner surface is offset longitudinally with respect to the inward projecting carrying surface of the lower inner surface.   29. The wear member of claim 28, wherein each inwardly projecting carrying surface is substantially elliptical.   29. A wear member according to claim 28, wherein the lateral width of the inwardly projecting carrying surface of the upper inner surface is in the range of about 60-80% of the width of the upper inner surface.   29. The longitudinal length of the inwardly projecting carrying surface of the upper inner surface is greater in the range of about 1-50% than the lateral width of the inwardly projecting bearing surface of the upper inner surface. The wear member according to 1. The cavity includes a front portion, a middle portion, and a rear portion,
29. A wear member according to claim 28, wherein the inwardly projecting carrying surface portion hangs over the intersection of the intermediate portion and the rear portion. A support structure arranged to receive the wear member, the support structure comprising:
A nose arranged to receive a cavity of the wear member,
A front portion having a plurality of outwardly facing surfaces angled at a first angle with respect to the longitudinal axis of the nose;
A rear portion having two horizontally spaced outward surfaces and two vertically spaced outward surfaces including an upper inner surface and a lower inner surface, the horizontally spaced apart portions A rear portion that is angled with respect to the longitudinal axis at a second angle different from the first angle, the outwardly spaced surface and the vertically spaced outward surface;
A first concave bearing surface positioned on the upward surface;
A support structure comprising a nose comprising a second concave bearing surface positioned on the downwardly facing surface.   40. A support structure according to claim 39, wherein the longitudinal length of each concave carrier surface is greater than the lateral width of each concave carrier surface.   40. The support structure of claim 39, wherein the lateral width of each concave bearing surface is about 70% of the width of the vertically spaced outward surfaces. A cavity arranged to mate with the nose of the adapter, the cavity
A front portion having a plurality of inwardly surfaces angled at a first angle with respect to the longitudinal axis of the cavity;
A rear portion having two horizontally spaced inward surfaces and two vertically spaced inward surfaces including an upward surface and a downward surface, the horizontally spaced inward A rear portion, wherein the surface and the vertically spaced inwardly facing surface are angled with respect to the longitudinal axis at a second angle different from the first angle;
A first convex carrier surface located on the upward surface;
A wear member comprising a cavity comprising a second convex bearing surface positioned on the downwardly facing surface.   43. A wear member according to claim 42, wherein the longitudinal length of each convex carrier surface is greater than the lateral width of each convex carrier surface.   A hole extending from one of the horizontally spaced inward surfaces to the exterior of the wear member, further comprising a hole sized and shaped to receive a locking pin. 43. A wear member according to claim 42. An adapter,
A rear end disposed to secure the adapter to the bucket lip;
A front end comprising a nose, the nose being
An upwardly substantially flat surface that at least partially confine the upwardly concave bearing surface;
An adapter having a front end comprising a downwardly facing substantially flat surface that at least partially confines the downwardly facing concave bearing surface;
A wear member,
A front end arranged to bite into the ground,
A rear end having a cavity, the cavity comprising:
A downward facing surface from which a first outward projection arranged to mate with the upward concave bearing surface extends;
An upwardly facing surface from which a second outward projection arranged to mate with the downwardly facing concave bearing surface extends;
A wear member assembly comprising: a wear member having a rear end. The nose is
A rear portion comprising the upward substantially flat surface and the downward substantially flat surface both angled at a first angle with respect to the longitudinal axis of the adapter;
46. The wear member assembly of claim 45, further comprising a front portion including a plurality of outwardly facing surfaces angled with respect to the longitudinal axis at a second angle that is less than the first angle. The cavity is
A rear portion comprising the upward surface and the downward surface both angled at a first angle with respect to the longitudinal axis of the cavity;
46. The wear member assembly of claim 45, further comprising a front portion including a plurality of inwardly surfaces angled with respect to the longitudinal axis at a second angle that is less than the first angle.   An intermediate portion between the front portion and the rear portion, the intermediate portion having at least one unsupported surface angled towards the longitudinal axis of the wear member, The unsupported surface is angled differently from the two unsupported surfaces of the rear portion and is angled differently from the two unsupported surfaces of the front portion. 26. The wear member of claim 25, further comprising.   The wear member assembly of claim 1, wherein the wear member is connectable to the nose in two rotational positions.   The wear member assembly of claim 1, wherein the wear member includes a wear member comprising a recess on an outer surface of the wear member.

Images