wear assembly

Abstract

A wear assembly for securing a wear component to an excavating device includes a base having a nose and a wear component having a socket. The nose and socket each have one or more complementary stabilizing surfaces disposed in their front and back portions.

Description

[0001] Related applications

[0002] This application claims the benefit of priority to U.S. Provisional Patent Application No. 63 / 160,408, filed March 12, 2021, entitled “Wear Assembly,” which is incorporated herein by reference in its entirety. Technical Field

[0003] This disclosure relates to a wear-resistant assembly for attaching wear-resistant parts to earthmoving equipment. Background Technology

[0004] Wear-resistant parts are typically attached along the front edge of earthmoving equipment (e.g., buckets, dredger cutterheads, drums, etc.) to protect the equipment from wear and enhance excavation operations. These wear-resistant parts may include toothed components, guards, adapters, wing guards, picks, etc. Such wear-resistant parts typically include a base, wear-resistant components, and a lock for releasably securing the wear-resistant components to the base.

[0005] Regarding the toothed component, the base typically includes a nose-like projection that is secured to the front edge of the device (e.g., the lip of a bucket). The nose-like projection may be formed as an integral part of the front edge or as part of one or more adapters secured to the front edge by welding or mechanical attachment. A tip or adapter is fitted onto the nose-like projection. The tip narrows into a front digging edge for penetrating and fracturing the ground. The assembled nose-like projection and tip cooperatively define an opening in which a lock is received to releasably retain the tip to the nose-like projection.

[0006] These types of wear-resistant parts typically withstand harsh conditions and heavy loads. Therefore, wear-resistant parts will wear out and need to be replaced over time. Summary of the Invention

[0007] This disclosure relates to an improved wear-resistant assembly for securing wear-resistant components to earthmoving equipment to improve wear life, utilize materials to reduce end-of-life weight, and provide design flexibility, stability, strength, and / or ease of replacement of the locking mechanism.

[0008] In one example, the wear-resistant component includes a mounting cavity opening at its rear end to accommodate a support base. The mounting cavity has a front and a rear portion. The front portion includes a first front support surface on the top or bottom side of the mounting cavity, two second front support surfaces opposite the first front support surface on the top or bottom side of the mounting cavity, and a front support wall transverse to the front support surfaces at the front end of the mounting cavity. The two second front support surfaces converge toward or away from the first front support surface towards a central portion on the top or bottom side, wherein the front support surfaces and the front support walls are supported against complementary surfaces on the support base. The rear portion includes a first rear support surface opposite the first front support surface on the top or bottom side of the mounting cavity and two second rear support surfaces opposite the first rear support surface on the top or bottom side of the mounting cavity. The second rear support surfaces converge toward or away from the first rear support surface towards a central portion on the top or bottom side, wherein the rear support surfaces are supported against complementary surfaces on the support base.

[0009] In one example, the wear-resistant component includes a mounting cavity opening at its rear end to accommodate a support base. The mounting cavity has a front and a rear portion. The front portion includes a first front support surface on the top or bottom side of the mounting cavity, two second front support surfaces opposite the first front support surface on the top or bottom side of the mounting cavity, and a front support wall transverse to the front support surfaces at the front end of the mounting cavity. The two second front support surfaces converge toward the first front support surface towards the central portion on the top or bottom side, wherein the front support surfaces and the front support walls are supported against complementary surfaces on the support base. The rear portion includes a first rear support surface opposite the first front support surface on the top or bottom side of the mounting cavity and two second rear support surfaces opposite the first rear support surface on the top or bottom side of the mounting cavity. The second rear support surfaces converge away from the first rear support surface towards the central portion on the top or bottom side, wherein the rear support surfaces are supported against complementary surfaces on the support base.

[0010] In another example, a wear-resistant component for earthmoving equipment includes a mounting cavity opening at the rear end to axially receive a support base. The mounting cavity comprises a front portion and a rear portion. The front portion includes a front support surface and a front bevel extending around the periphery of the front portion between adjacent front support surfaces, and a front support wall transverse to the front support surface at the front end of the mounting cavity, wherein the front support surface and the front support wall are supported abutting against complementary surfaces on the support base. The second portion includes a rear support surface and a rear bevel extending around the periphery of the rear portion between adjacent rear support surfaces, wherein each of the front support surfaces is axially aligned with one of the rear bevels, and wherein the rear support surface is supported against complementary surfaces on the support base.

[0011] In another example, a wear-resistant component for earthmoving equipment includes a mounting cavity opening at the rear end of the wear-resistant component to receive a support base. The mounting cavity comprises a front portion and a rear portion. The front portion includes a top front support surface and two bottom front support surfaces converging away from the top front support surface. The rear portion includes a bottom rear support surface and two top rear support surfaces converging away from the bottom rear support surfaces. The front support surfaces and the rear support surfaces are supported by complementary surfaces on the support base.

[0012] In another example, a wear-resistant component includes: a support base having a mounting portion; and a wear-resistant part for earthmoving equipment having a mounting cavity opening in the rear end of the wear-resistant part for receiving the support base, the mounting cavity having a front portion and a rear portion, the front portion including a first front support surface on the top or bottom side of the mounting cavity, two second front support surfaces on the top or bottom side of the mounting cavity opposite to the first front support surface, and a front support wall transverse to the front support surfaces at the front end of the mounting cavity, the two second front support surfaces being remote from the first front support surface. The rear portion includes a first rear support surface opposite the first front support surface on the top or bottom side of the mounting cavity and two second rear support surfaces opposite the first rear support surface on the top or bottom side of the mounting cavity, the second rear support surfaces converging towards the center portion of the top or bottom side away from the first rear support surface, wherein the rear support surfaces abut against the complementary surface on the support base; and a lock for securing the wear-resistant component to the support base.

[0013] In another example, a wear-resistant component includes: a support base having a mounting portion; a wear-resistant part for earthmoving equipment including a mounting cavity opening in the rear end of the wear-resistant part for receiving the support base, the mounting cavity including a front portion and a rear portion, the front portion including a top front support surface and two bottom front support surfaces converging away from the top front support surface, and the rear portion including a bottom rear support surface and two top rear support surfaces converging away from the bottom rear support surfaces, wherein the front support surfaces and the rear support surfaces are supported against complementary surfaces on the support base; and a lock for securing the wear-resistant part to the support base.

[0014] In one example, a wear-resistant component includes: a support base having a mounting portion; a wear-resistant part for earthmoving equipment including a mounting cavity opening in a rear end for axially receiving the support base, the mounting cavity including a front portion and a rear portion, the front portion including a front support surface and a front corner extending around the periphery of the front portion between a front support surface and an adjacent front support surface, and a front support wall transverse to the front support surface at a front end of the mounting cavity, wherein the front support surface and the front support wall are supported against complementary surfaces on the support base, and the second portion including a rear support surface and a rear corner extending around the periphery of the rear portion between an adjacent rear support surface, wherein each of the front support surfaces is axially aligned with one of the rear corners, wherein the rear support surface is supported against complementary surfaces on the support base; and a lock for securing the wear-resistant part to the support base.

[0015] In another example, a wear-resistant component for earthmoving equipment includes a nose-shaped protrusion for mounting to the front end of the wear-resistant component to receive a second wear-resistant component. The nose-shaped protrusion has a front portion and a rear portion. The front portion includes a first front support surface on the top or bottom side of the nose-shaped protrusion, two second front support surfaces on the top or bottom side of the nose-shaped protrusion opposite to the first front support surface, and a front support wall transverse to the front support surfaces at the front end of the nose-shaped protrusion. The two second front support surfaces converge towards a central portion on the top or bottom side away from the first front support surface, wherein the front support surfaces and the front support walls are supported against complementary surfaces on a support base. The rear portion includes a first rear support surface on the top or bottom side of the nose-shaped protrusion opposite to the first front support surface, and two second rear support surfaces on the top or bottom side of the nose-shaped protrusion opposite to the first rear support surface. The second rear support surfaces converge towards a central portion on the top or bottom side away from the first rear support surface, wherein the rear support surfaces are supported against complementary surfaces on a support base.

[0016] In another example, a wear-resistant component for earthmoving equipment includes a nose-shaped protrusion at the front end of the wear-resistant component to accommodate a second wear-resistant component. The nose-shaped protrusion includes a front portion and a rear portion, the front portion including a top front support surface and two bottom front support surfaces converging away from the top front support surface, and the rear portion including a bottom rear support surface and two top rear support surfaces converging away from the bottom rear support surfaces, wherein the front and rear support surfaces are supported abutting against complementary surfaces on a support base.

[0017] In another example, a wear-resistant component for earthmoving equipment includes a nose-shaped protrusion to axially receive a second wear-resistant component. The nose-shaped protrusion includes a front portion and a rear portion. The front portion includes a front support surface and a front corner extending around the periphery of the front portion between adjacent front support surfaces, and a front support wall transverse to the front support surface at the front end of the nose-shaped protrusion. The front support surface and the front support wall abut against complementary surface supports on the mounting portion of the second wear-resistant component. The second portion includes a rear support surface and a rear corner extending around the periphery of the rear portion between adjacent rear support surfaces. Each of the front support surfaces is axially aligned with one of the rear corners, and the rear support surface abuts against complementary surface supports on the mounting portion of the second wear-resistant component.

[0018] In one example, the lip of the bucket includes a mounting portion for mounting a wear-resistant component thereon. The mounting portion includes a front section and a rear section. The front section includes a first front support surface on the top or bottom side of the mounting portion, two second front support surfaces on the top or bottom side of the mounting portion opposite to the first front support surface, and a front support wall transverse to the front support surfaces at the front end of the mounting portion. The two second front support surfaces converge towards a central portion away from the first front support surface and towards the top or bottom side, wherein the front support surfaces and the front support walls are supported against complementary surfaces on the wear-resistant component. The rear section includes a first rear support surface on the top or bottom side of the mounting portion opposite to the first front support surface, and two second rear support surfaces on the top or bottom side of the mounting portion opposite to the first rear support surface. The second rear support surfaces converge towards a central portion away from the first rear support surface and towards the top or bottom side, wherein the rear support surfaces are supported against complementary surfaces on the wear-resistant component.

[0019] In another example, the lip of the bucket includes a mounting portion for mounting wear-resistant components thereon. The mounting portion includes a front section and a rear section. The front section includes a top front support surface and two bottom front support surfaces converging away from the top front support surface, and the rear section includes a bottom rear support surface and two top rear support surfaces converging away from the bottom rear support surfaces, wherein the front and rear support surfaces are supported against complementary surfaces on a support base.

[0020] In another example, the lip of the bucket includes a mounting portion for mounting a wear-resistant component thereon. The mounting portion includes a front portion and a rear portion. The front portion includes a front support surface and a front corner extending around the periphery of the front portion between adjacent front support surfaces, and a front support wall transverse to the front support surface at the front end of a nose-shaped protrusion, wherein the front support surface and the front support wall abut against complementary surface supports on the mounting portion of the second wear-resistant component, and the second portion includes a rear support surface and a rear corner extending around the periphery of the rear portion between adjacent rear support surfaces, wherein each of the front support surfaces is axially aligned with one of the rear corners, and wherein the rear support surface abuts against complementary surface supports on the mounting portion of the second wear-resistant component.

[0021] In one example, the wear-resistant component includes a base defining a nose-shaped protrusion having a plurality of support surfaces extending axially, substantially parallel to a longitudinal axis of the nose-shaped protrusion. The support surfaces include a plurality of front support surfaces formed generally along a distal end of the base and a plurality of rear support surfaces formed on a proximal end of the nose-shaped protrusion opposite to the distal end. A wear-resistant component defining a mounting cavity to be mounted onto the base has support surfaces complementary to the support surfaces of the nose-shaped protrusion. The complementary support surfaces include a plurality of front support surfaces formed generally along a distal end of the mounting cavity and a plurality of rear support surfaces formed on a proximal end of the mounting cavity opposite to the distal end. The plurality of rear support surfaces of the base and the wear-resistant component are offset from the plurality of front support surfaces of the base and the wear-resistant component such that the front support surfaces of the base and the wear-resistant component are axially aligned with corners in the rear portions of the base and the mounting cavity, respectively. A lock is also included for securing the wear-resistant component to the base.

[0022] In another example, a wear-resistant component includes a base defining a nose-shaped protrusion having a plurality of support surfaces extending axially, substantially parallel to a longitudinal axis of the nose-shaped protrusion. The support surfaces include a plurality of front support surfaces formed generally along a distal end of the base and a plurality of rear support surfaces formed on a proximal end of the nose-shaped protrusion opposite to the distal end. The front and rear support surfaces of the base generally define a pentagonal shape, and the rear support surfaces of the base are positioned about 180 degrees rotated relative to the front support surfaces of the base about a longitudinal axis. A wear-resistant component defining a mounting cavity to be mounted onto the base has support surfaces complementary to the support surfaces of the nose-shaped protrusion. The complementary support surfaces include a plurality of complementary front support surfaces formed generally along a distal end of the mounting cavity and a plurality of complementary rear support surfaces formed on a proximal end of the mounting cavity opposite to the distal end. A lock is also provided for securing the wear-resistant component to the base.

[0023] In another example, the wear-resistant component includes a mounting cavity, wherein each of the front and rear portions has two first support surfaces converging in one direction and two second support surfaces converging in opposite directions. The first support surfaces in the front portion converge at an angle different from that of the second support surfaces in the rear portion.

[0024] In another example, the wear-resistant component includes a mounting cavity opening at its rear end for receiving a support base. The mounting cavity is defined by a front and a rear portion, each having a top wall, a bottom wall, and a side wall, and a longitudinal axis. A plurality of front support surfaces are formed generally along the distal end of the mounting cavity, and a plurality of rear support surfaces are formed on the proximal end of the mounting cavity opposite the distal end. The rear support surfaces are offset from the front support surfaces such that the front support surfaces are axially aligned with corners in the rear portion of the socket, and the rear support surfaces are axially aligned with corners in the front portion of the socket.

[0025] In another example, the wear-resistant component includes a mounting cavity having: a front portion having a top wall and two converging support surfaces opposite the top wall; and a rear portion having a bottom wall and two converging support surfaces opposite the bottom wall to abut against complementary surfaces on a base.

[0026] In one example, the wear-resistant component includes a base and wear-resistant parts defining the base and mounting cavity, respectively. The base and mounting cavity have complementary support surfaces extending substantially parallel to the longitudinal axes of the nose-like protrusion and the mounting cavity. A plurality of front support surfaces are formed generally along the distal ends of the base and mounting cavity, and a plurality of rear support surfaces are formed on the proximal ends of the base and mounting cavity opposite to the distal ends. The plurality of rear support surfaces are offset from the plurality of front support surfaces such that the front support surfaces are axially aligned with corners in the rear portion of the base and mounting cavity, and the rear support surfaces are axially aligned with corners in the front portion of the base and mounting cavity.

[0027] In another example, the wear-resistant assembly includes a base and wear-resistant components defining the base and mounting cavity, respectively, the base and mounting cavity forming complementary support surfaces extending axially substantially parallel to the longitudinal axis of the wear-resistant assembly. A plurality of front support surfaces are formed generally along the distal ends of the base and mounting cavity, and a plurality of rear support surfaces are formed on the proximal ends of the base and mounting cavity opposite to the distal ends. The plurality of front support surfaces generally define a pentagonal shape. The plurality of rear support surfaces generally define a pentagonal shape, wherein the plurality of rear support surfaces are positioned to be rotated 180 degrees relative to the front support surfaces about the longitudinal axis.

[0028] In another example, the wear-resistant component includes a nose-shaped protrusion, and the complementary recesses of the base and the wear-resistant part are each formed in a generally pentagonal configuration at the front and an inverted pentagonal configuration at the rear. This construction provides high strength and a longer service life. Attached Figure Description

[0029] Figure 1 A perspective view of the wear-resistant component and lip edge, and a portion thereof, according to this disclosure.

[0030] Figure 2A for Figure 1 Exploded view of the wear-resistant components and lip.

[0031] Figure 2B An exploded view of the second wear-resistant component and a portion of the lip according to this disclosure.

[0032] Figure 3 for Figure 1 A perspective view of the first wear-resistant component of the wear-resistant assembly.

[0033] Figure 4 for Figure 3 A top view of the nose-shaped protrusion of the first wear-resistant component.

[0034] Figure 5 for Figure 3 A bottom view of the nose-shaped protrusion of the first wear-resistant component.

[0035] Figure 6 for Figure 3 A side view of the nose-shaped protrusion of the first wear-resistant component.

[0036] Figure 7 for Figure 3 A bottom perspective view of the nose-shaped protrusion of the first wear-resistant component.

[0037] Figure 8 for Figure 3 A front view of the nose-shaped protrusion of the first wear-resistant component.

[0038] Figure 9 for Figure 1 A partial rear perspective view of the second wear-resistant component of the wear-resistant assembly.

[0039] Figure 10 for Figure 9 Rear view of the second wear-resistant component.

[0040] Figure 11 For the section along line 11-11 Figure 10 A partial cross-sectional view of the second wear-resistant component.

[0041] Figure 12 An exploded view of the nose-shaped protrusion and a portion of the lip of the third wear-resistant component according to this disclosure.

[0042] Figure 13 for Figure 12 A perspective view of the first wear-resistant component of the third wear-resistant assembly.

[0043] Figure 14 for Figure 12 A top view of the nose-shaped protrusion of the first wear-resistant component.

[0044] Figure 15 for Figure 12 A bottom view of the nose-shaped protrusion of the first wear-resistant component.

[0045] Figure 16 for Figure 12 A side view of the nose-shaped protrusion of the first wear-resistant component.

[0046] Figure 17 for Figure 12 A front view of the nose-shaped protrusion of the first wear-resistant component.

[0047] Figure 18 for Figure 12 A partial rear perspective view of the second wear-resistant component of the third wear-resistant assembly.

[0048] Figure 19 for Figure 18 Rear view of the second wear-resistant component.

[0049] Figure 20 For the section along line 20-20 Figure 19 A partial cross-sectional view of the second wear-resistant component. Detailed Implementation

[0050] exist Figure 1 and 2A In one example, the wear-resistant component 10 includes a toothed member 11 having a wear-resistant part 45, which is releasably fixed to a nose-shaped protrusion 19 of an adapter 14, which is then mounted to a support structure or base 12 of the earthmoving equipment. For ease of discussion, the installation of the toothed member 11 to the digging edge 12 of the bucket is disclosed herein, but other types of wear-resistant components and / or other types of earthmoving equipment may also be used. For example, although the wear-resistant part is a tip 45 in the illustrated example, the wear-resistant part could also be an intermediate adapter, a guard, a wing guard, etc. Similarly, although the support structure shown is the lip of the bucket, the support structure could also be the front edge of a bucket sidewall, a dredger cutterhead, a roller, a blade, etc. In this application, for ease of reference... Figure 1 Explanation uses relative terms, such as upper, lower, internal, external, forward, backward, vertical, or horizontal; other orientations are possible.

[0051] In one example, the digging edge 12 is defined by the lip of a bucket (e.g., the scoop of a cable shovel) and includes a leading surface 16, an inner surface 18, and an outer surface 20. In the illustrated embodiment, a perforation or keyway 24 is provided in the digging edge 12, passing through the inner surface 18 and the outer surface 20. Figure 2A Although a Whisler-style lip and adapter are shown, wear-resistant components 45, such as those disclosed herein, can be used on various earthmoving machines, attached to other types of digging edges (with or without holes), attached to other types of adapters, nose protrusions, etc., and / or attached to support structures in various ways. The leading surface 16 is shown as a curved surface, but other variations are possible. Although only a small portion of the digging edge 12 is shown in the figures, the digging edge 12 may include a series of perforations 24 for mounting other toothed components to the bucket. Various constructions and / or other wear-resistant components (not shown) may also be provided on other portions of the digging edge.

[0052] exist Figure 2A In the example illustrated, the base is an adapter 14 secured to the excavation edge 12 by a lock 60 having features such as a threaded wedge 62, a spool 64, and other features like a stabilizer 90, as disclosed in U.S. Patent No. 7,171,771 (incorporated herein by reference), but other locking configurations are possible. For example, the adapter can be secured to the excavation edge by welding, bolting, other locks, etc. The toothed member 11 shown includes a wear-resistant part 45 in the form of a pointed tip, a wear-resistant cover 13, and the adapter 14, but other configurations are also possible.

[0053] exist Figure 2B In the examples described, the base is a forward-projecting, nose-like protrusion that is part of the cast lip, rather than a separately fixed adapter (see, for example, see...). Figure 2AIn this example, the wear-resistant component 10' is a toothed member 11' that includes a wear-resistant part 14' and a wear-resistant cap 13'. The wear-resistant part is in the form of a tip or intermediate adapter that fits onto a nose-shaped protrusion 19' of the casting excavation edge 12'. If the wear-resistant part is an intermediate adapter, then the tip or tip (not shown) can be mounted on the front nose-shaped protrusion of the wear-resistant part. A lock 17' is used to releasably secure the wear-resistant part to a base, such as that disclosed in U.S. Patent 9,222,243 (incorporated herein by reference). The lock 17' can be used to secure the tip (not shown) to the intermediate adapter 14' and the intermediate adapter 14' to the nose-shaped protrusion 19'. In this example, the same type of lock is used in both cases, but different locks may also be used. For example, the lock is disclosed in U.S. Provisional Application 63 / 176,065, which is incorporated herein by reference. Alternatively, the lock 17 can be used to secure the tip 45 to the nose-shaped protrusion 19'. In this document, wear-resistant component elements (e.g., intermediate adapters) may be referred to as wear-resistant parts and / or bases, depending on the context of the discussion, where the element is a support for the wear-resistant part and / or is supported by the base itself.

[0054] refer to Figure 3 The adapter 14 supports the ground-penetrating tip 45 and secures it to the digging edge 12. The adapter 14 includes a forward-projecting nose-like protrusion 19 for mounting the tip 45, and a mounting end 74 with forked legs 48a, 48b spanning the digging edge 12. The upper leg 48a is positioned to engage the inner surface 18 of the digging edge 12, and the lower leg 48b is positioned to engage the outer surface 20 of the digging edge 12. Each of the upper and lower legs 48a and 48b includes holes 58a, 58b through which a lock 60 can be inserted. The holes 58a, 58b are positioned such that when the adapter 14 is properly positioned on the bucket digging edge 12, the holes 58a, 58b align with a through-hole 24 to allow the lock 60 to pass through and be fitted ( Figure 2A The outriggers 48a and 48b are connected via the curved portion 68.

[0055] refer to Figures 4 to 8 The nasal protrusion 19 has a body 25, the body having a front portion 26, a rear portion 28, and a transition portion 27. Figure 6 The main body 25 extends rearward from the front portion 26 to the rear portion 28. The transition portion 27 is located between the front portion 26 and the rear portion 28 of the nose-like protrusion 19. The rear portion 28 is adjacent to the blending area that transitions to the adapter 14.

[0056] The front section 26 has a streamlined profile, which improves penetration into the ground during excavation operations. In the illustrated example, the front section 26 includes front support surfaces 30, 31, 32, 33, 34 and a front support wall 36 transverse to the front support surfaces 30 to 34, but other variations are possible. More specifically, the front support surfaces include a top support surface 30, side support surfaces 31, 34, and bottom support surfaces 32, 33. The front support surfaces 30 to 34 and the front wall 36 abut against complementary surface supports at the front of the mounting cavity or socket 70 in the wear-resistant component 45. The front wall 36 resists rearward load L3 ( Figure 1 The support surfaces 30 to 34 may abut against the complementary surface across the entire width and length, or a portion thereof, of the complementary surface in the tip. In the illustrated example, the front support surfaces 30 to 34 are generally planar, but may be curved, such as a wide convex or concave shape curved around an axial and / or lateral axis, or any combination thereof with a planar surface. The front support surfaces 30 to 34 extend rearward to the transition section 27. The front support surfaces 30 to 34 extend rearward from the front surface 36 and axially, substantially parallel to the longitudinal axis 35, to help stabilize the support of the wear-resistant component 45. The term "substantially parallel" is intended to include parallel surfaces as well as surfaces offset from the longitudinal angle at small angles (e.g., about 0 to 7 degrees) for manufacturing purposes and / or ease of removal. The front support surfaces are preferably offset axially in the rearward direction from the longitudinal axis 35 at an angle of 5 degrees or less, and most preferably at an angle of 3 degrees or less. The longitudinal axis 35 is the longitudinal axis of the nose-shaped protrusion 14 and the mounting cavity 70 within the wear-resistant component 45. The longitudinal axis 35 can be generally defined as the center of the front wall 36 along the straight line of movement when the front wall is mounted into the mounting cavity 70. The support surfaces 30 to 34, which extend substantially parallel to the longitudinal axis, are sometimes referred to herein as stabilizing surfaces. The stabilizing surfaces are intended to stabilize the wear-resistant component 45 mounted on the nose protrusion 19 against vertical, lateral, and combined loads.

[0057] In the illustrated embodiment, the front wall 36 and the front portion 26 have a generally pentagonal shape, but other surfaces may be located at one or more corners. In some instances, the front wall may have other polygonal shapes. In some instances, the front wall 36 may optionally be inclined relative to the longitudinal axis, preferably such that the front wall 36 forms an acute angle X with the top surface 30, but other orientations perpendicular to the axis or other orientations are also possible. For example, the front surface is preferably planar, but may be convex, concave, curved, or composed of angular segments. Figure 8In terms of orientation, the top surface 30 is substantially parallel to the horizontal plane. The bottom support surfaces 32 and 33 each converge downwards toward each other in the lateral direction to form the corners of a pentagon. In other examples, the top support surfaces 30, 31, and 34 may be the bottom of a pentagon, where the pentagons converge upwards. In yet another example, the "top" of the pentagon may be at an eccentric angle or laterally. Using such converged bottom support surfaces 32 and 33 can provide increased material utilization, thereby reducing scrap weight and extending wear life at the end of the tip's life. The side support surfaces 31 and 34 preferably converge upwards and laterally. Adjacent support surfaces 30 to 34 can be connected by a corner 37, which is generally rounded. The corner 37 in the front 26 creates: an angle α between adjacent support surfaces 30 and 34 and support surfaces 30 and 31; an angle β between support surfaces 31 and 32 and support surfaces 33 and 34; and an angle δ between bottom support surfaces 32 and 33. In one example, angles α, β, and δ are each equal to 108 degrees, but other combinations are possible. In another example, angle α is approximately 108 to 112 degrees, angle β is approximately 95 to 99 degrees, and angle δ is approximately 128 to 132 degrees. Angles α, β, and δ can typically be between 90 and 135 degrees, but other examples outside these ranges are possible. The angles and overall front configuration of the nose-like protrusions (i.e., support surfaces 31 to 34) can vary significantly. For example, one side of the support surface may have different angles α and β than the other side, resulting in an inhomogeneous shape (e.g., an inhomogeneous side pentagon). In one such example, surfaces 30 to 34 may be non-uniform in length to better accommodate a lock on one side.

[0058] In the example described ( Figures 4 to 8In the first part 28, the rear portion includes rear support surfaces 51, 52, 53, 54, and 55. Rear support surfaces 51 to 55 extend rearward from the transition portion 27 and include top rear support surfaces 51 and 55, side rear support surfaces 52 and 54, and a bottom rear support surface 53. The rear support surfaces 51 to 55 are layered (i.e., widely spaced) relative to the front support surfaces 30 to 34 to enhance strength, removability, and operability. Like the front support surfaces 30 to 34, the rear support surfaces 51 to 55 extend substantially parallel to the longitudinal axis 35 axially to assist in stabilizing and supporting the wear-resistant component 45; for example, the rear support surfaces are offset rearward at a small angle from the longitudinal axis 35. The support surfaces 51 to 55, extending substantially parallel to the longitudinal axis, are sometimes referred to herein as stabilizing surfaces. The rear support surfaces 51 to 55 abut against corresponding surface supports in the mounting cavity 70 of the wear-resistant component 45 and, together with the front support surfaces 30 to 34, serve as stabilizing surfaces for the wear-resistant component. The front support surfaces and rear support surfaces 30 to 34, 36, 51 to 55 abut against complementary surface supports in the mounting cavity 70 of the wear-resistant component 45 to resist various combinations of vertical, lateral, rotational, and axial loads (e.g., L1, L2, L3, R1) applied to the wear-resistant component 45 during excavation operations. Figure 1 ).

[0059] Like the front portion 26, the rear portion 28 preferably has a generally pentagonal shape, but may include other surfaces instead of corners. The rear portion 28 has an opposite orientation to the front portion 26. For example, if the front portion 26 has a downwardly converging support surface, then the rear portion 28 has an upwardly converging support surface (and vice versa). Reference Figure 8 The top rear support surfaces 51 and 55 converge upwards toward each other, but other configurations are also possible. In one such example, the top rear support surfaces 51 and 53 may be rotated about the longitudinal axis in an orientation such that they converge downwards and are located at the bottom. In the illustrated orientation, the bottom rear support surface 53 is substantially parallel to the horizontal plane. The flatness of the bottom support surface 53 allows the bottom legs 48b of the adapter 14 to have a constant thickness, thereby reducing the rate of wear on the bottom legs. The side rear support surfaces 52 and 54 converge upwards, but other configurations are also possible. Adjacent support surfaces 51 to 55 may be connected by a generally circular corner 57. The corner 57 produces: an angle α' between the bottom rear support surface 53 and each side rear support surface 52 and 54; an angle β' between support surfaces 51 and 54 and 55 and 52; and an angle δ' between the top rear support surfaces 51 and 55.

[0060] In the illustrated embodiment, the rear support surfaces 51 to 55 are oriented 180 degrees relative to the front support surfaces 30 to 34. Generally, each of the corners 37 of the front portion 26 is axially aligned with one of the support surfaces 51 to 55 of the rear portion 28, and each of the corners 57 of the rear portion is axially aligned with one of the support surfaces 30 to 34 of the front portion 26. The angles between adjacent rear support surfaces 51 to 55 may all be 108 degrees, or there may be differences, such as those discussed above relative to the front support surfaces. The angles between the rear support surfaces may match the corresponding front support surfaces (i.e., with 180-degree reorientation). As an example, angle α may be the same as angle α', angle β may be the same as angle β', and angle δ may be the same as angle δ'. In other examples, angle α may be different from angle α', angle β may be different from angle β', and / or angle δ may be different from angle δ'.

[0061] In the illustrated example, angle α > angle α'; angle β < angle β'; and angle δ = angle δ', but other combinations of angles α', β', and δ' are also possible. In one example, angle α' is approximately 88 to 92 degrees, angle β' is approximately 117 to 121 degrees, and angle δ' is approximately 128 to 132 degrees. Angles α', β', and δ' can typically be in the range of approximately 85 to 135 degrees, but other examples outside this range are also possible. The angles can be selected based on considerations of the expected load and machine operation. For example, when a heavy vertical load (e.g., a downward load L1) is typically expected, angles δ' and α can be oriented towards the larger end of the range, so that support surfaces 31 and 34 are closer to vertical to resist downward loads along with support surface 30, and support surfaces 32 and 33 are closer to vertical to resist upward loads. Using larger angles α and δ' can also produce a more elongated vertical profile, resulting in better penetration. This same arrangement can then be used for the rear support surfaces. For example, angles α' and δ can be oriented towards the larger end to better resist vertical forces and maintain a more slender profile. Nevertheless, other angular arrangements are also possible. The overall rear configuration of the nose-like protrusions (i.e., the supporting surfaces 51 to 55) can vary significantly from instance to instance (e.g., in shape and size) and can vary significantly relative to the front configuration.

[0062] In another example, one side of the rear support surfaces 51 to 55 may have angles α', β' different from the other side of the rear support surfaces 51 to 55, resulting in an uneven shape. In this case, the lengths of surfaces 51 to 55 may be uneven. In one such example, one or both of the support surfaces in the front and rear portions may have different lengths and / or corner angles on one side of the nose-like protrusion compared to the other side.

[0063] In some instances, due to the inclination of the side support surfaces 52, 54, the bottom rear support surface 53 may have a longer lateral extension than the top rear support surfaces 51, 55. Figures 4 to 5 (and 8). In other examples, the top rear support surfaces 51, 55 may have a lateral extension equal to or shorter than the length of the bottom rear support surface 53. Other variations are also possible. The rear support surfaces may be planar or formed with broad curves (convex or concave). Alternatively, the rear support surfaces 51 to 55 may be formed with curves, such as broad convex or concave curves around the longitudinal and / or lateral axes, as disclosed above with respect to the front support surfaces 30 to 34.

[0064] The combination of the front support surfaces and the rear support surfaces 30 to 34, 51 to 55 stably supports the wear-resistant component 45 on the nose protrusion 19, i.e., utilizing complementary support surfaces in the mounting cavity 70 discussed below. In this way, the front support surfaces and the rear support surfaces 30 to 34, 51 to 55 provide stability for vertical, lateral, and combined loads around the entire nose protrusion 19. The front bottom support surfaces 32, 33 have downward-facing pentagons, as this corresponds to the end-of-life wear at the front end of the nose protrusion 19. Similarly, the top rear support surfaces 51, 55 have upward-facing pentagons, which corresponds to the end-of-life wear at the rear end of the nose protrusion 19. The rear bottom support surfaces are preferably horizontal (e.g., parallel to the lip centerline), as this corresponds to the characteristics of the bottom support leg 48b. The front top support surfaces are horizontal to effectively resist downward loads.

[0065] Transition portion 27 includes transition surfaces 40 to 44, 46 to 50, which preferably extend rearward axially at an angle greater than substantially parallel to the longitudinal axis to increase the strength and penetrating power of the nose-like protrusion. In the illustrated embodiment, the transition surfaces include top transition surfaces 40, 41, 42, side transition surfaces 43, 44, 46, 47, and bottom surfaces 48, 49, 50. Transition portion 27 transforms the support surfaces 30 to 34 in the front portion 26 into the corner surface 57 in the rear portion 28. Similarly, transition portion 27 transforms the corner surface 37 in the front portion 26 into the support surfaces 51 to 55 in the rear portion 28. In the illustrated example, the bottom corner surface 37 (also associated with the top tip of the pentagonal shape) is adjacent to the bottom transition surface 49 to transition to the bottom support surface 53, etc.

[0066] One or both of the corresponding side transition surfaces 43, 44, 46, and 47 may include a lock cutout portion 59 and a lock hole 61. The hole may be a blind hole. If holes are provided on both sides, then each hole may be a blind hole, or it may be the opposite end of a perforation in a nose-shaped protrusion. The cutout portion 59 allows the lock 17 to be positioned closer to the center of the toothed member 11, thereby reducing the sidewall thickness of the tip 45. In some instances, the side transition surfaces 43, 44, 46, and 47 are substantially aligned with a vertical plane to create generally vertical sidewalls. This arrangement makes certain lock variations more ergonomic for operators installing and removing wear-resistant components.

[0067] refer to Figures 9 to 11 The illustration depicts a wear-resistant component 45 in the form of a pointed tip for mounting on a nose-shaped protrusion 19, but the wear-resistant component may have other configurations and / or purposes; for example, the wear-resistant component may be an intermediate adapter 14' or other wear-resistant components. In the illustrated embodiment, the wear-resistant component 45 includes a front working end 66 and a rear mounting end 74. Although the working end 66 is shown as a linear drill bit protruding from the mounting end 74, it need not be; the drill bit may be offset from the longitudinal axis 35. The mounting end 74 is formed with a recess 70 that receives the nose-shaped protrusion 19 for supporting the wear-resistant component 45 on a ground work device (not shown). The recess 70 is formed by a front portion 94 and a rear portion 96, each having an internal top wall, bottom wall, and sidewalls. The rear portion 96 is adjacent to a second mixing region that complements the mixing region of the nose-shaped protrusion 19. Preferably, the recess 70 has a shape complementary to the nose-shaped protrusion 19, but some variations may be included.

[0068] In one example, the socket 70 includes a plurality of front support surfaces 130 to 134 at its front portion 94. In the illustrated example, the front portion 94 of the socket 70 is generally pentagonal in shape and includes: bottom support surfaces 132, 133; a top support surface 130; and side support surfaces 131, 134 to match at least a portion of the front portion 26 of the nose-like protrusion 19, but other shapes are also possible. The front wall 98 also provides support. For example, while surfaces 130 to 134 are preferably planar, they may be convex, concave, curved, or composed of angular segments. Adjacent front support surfaces may be connected by corners 137, which are generally rounded. The length of each rearwardly extending support surface 130 to 134 may correspond to the front portion 26 of the nose-like protrusion 19, but other configurations are also possible. For example, the length of each support surface 130 to 134 may be less than the length of the front support surfaces 30 to 34. In this case, only a portion of the supporting surfaces 30 to 34 will engage at any given time. The front wall 98 may be tilted or perpendicular to the longitudinal axis 35 to complement the front wall 36. For example, the front wall 98 may be at a lateral angle aligned with the lateral angle of the front surface 36.

[0069] refer to Figure 10 The socket 70 includes a plurality of support surfaces 151 to 155 at its rear portion 96 or open end. In the illustrated example, the rear portion 96 of the socket 70 is generally pentagonal in shape and includes: a bottom support surface 153; top support surfaces 151, 155; and side support surfaces 152, 154 to mate with at least a portion of the rear portion 28 of the nose-shaped protrusion 19. For example, while surfaces 151 to 155 are preferably planar, they may be convex, concave, curved, or composed of angular segments. The top rear support surfaces 151, 155 each converge upwards from corner 137 to the pentagonal corner 157 in the lateral direction at a 180-degree offset, while the bottom front support surfaces 132, 133 converge at the front portion 96 of the socket 70. Preferably, the inclined support surfaces 132, 133 and 151, 155 are symmetrically offset by 180 degrees from each other. Adjacent support surfaces 151 to 155 may be connected by a generally rounded corner 157. The length and / or width of each support surface 151 to 155 may correspond to the support surfaces 51 to 55 of the rear portion 28 of the nose protrusion 19, but other configurations are also possible. For example, the length and / or width of each support surface 151 to 155 may be less than the length of the rear support surfaces 51 to 55. In this case, only a portion of the support surfaces 51 to 55 will engage at any given time. The rear support surfaces 151 to 155 define a cavity opening 164 at the rear end 74 of the tip 45 to receive the nose protrusion 19 of the adapter 14.

[0070] Preferably, the support surfaces 130 to 134, 151 to 155 in the tip are designed to match the support surfaces formed on the nose protrusion 19; that is, if the support surfaces 30 to 34, 51 to 55 in the nose protrusion are deviated at an angle of about 2 degrees relative to the longitudinal axis 35, then the support surfaces 130 to 134, 151 to 155 of the socket 70 are also deviated at an angle of about 1 to 2 degrees relative to the longitudinal axis 35.

[0071] When a load with a downward vertical component (referred to herein as vertical load L1) is applied along the digging edge 66 of the tip 45, the tip 45 is propelled forward and rolls away from the nose-shaped protrusion. For example, when the downward load L1 is applied to the top of the digging edge 66 of the tip 45 ( Figure 1When the tip 45 is pushed forward and rolls on the nose-shaped protrusion 19, the front support surface 130 in the socket 70 is supported against the support surface 30 at the front end 26 of the nose-shaped protrusion 19. The rear bottom portion 96 of the tip 45 is also pulled upward against the rear bottom portion of the nose-shaped protrusion 19, so that the rear support surface 153 in the socket 70 is supported against the lower rear support surface 53 on the nose-shaped protrusion 19. Therefore, the tip 45 is stably supported on the nose-shaped protrusion 19, which increases the strength and stability of the base, reduces wear, and allows for the use of a smaller lock 17. In another example, when an upward vertical load is applied to the bottom of the excavation edge 66 of the tip 45, the tip is pushed upward and rolls off the nose-shaped protrusion 19, so that the front support surfaces 132, 133 in the socket 70 are supported against the support surfaces 32, 33 at the front end of the nose-shaped protrusion. Furthermore, the rear tip 96 of the tip is pulled downward against the rear bottom of the nose-shaped protrusion, causing the rear support surfaces 151, 155 in the bearing socket 70 to be supported against the upper rear bearing surfaces 51, 55. Surfaces 30 to 34, 52, 54, 130 to 134, 152, and 154 function in the same manner, for example, against lateral loads (L2). The inclined orientation of the support surfaces 32, 33, 51, and 55 of the nose-shaped protrusion enables the support surfaces 132, 133, 151, and 155 in the bearing socket 70 to resist lateral and vertical loads.

[0072] The laterally inclined surfaces 32, 33, 51, 55, 132, 133, 151, and 155 in the front and rear portions of the nose protrusion 19 and the socket 70 are capable of resisting vertical and lateral loads, and when the load is shifted during excavation operations that force the tip through the ground, the laterally inclined surfaces reduce the offset between the tip and the nose protrusion to provide stable mounting and less wear.

[0073] The top wall, bottom wall, and side walls 141 to 150 of the socket 70 extend from the front portion 94 to the rear portion 96. The top wall, bottom wall, and side walls 141 to 150 of the socket 70 generally converge towards the front portion 94 of the socket 70; significant variations in the surface within the transition section are possible, provided it generally transitions from a larger rear portion to a smaller front portion. Figure 11 In the illustrated example, the top wall, bottom wall, and side walls 141 to 150 are corrugated, but other configurations are possible. The top wall, bottom wall, and side walls 141 to 150 transform the front support surfaces 130 to 134 in the front portion 94 into the corner surface 157 in the rear portion 96. Similarly, the top wall, bottom wall, and side walls 141 to 150 transform the rear support surfaces 151 to 155 into the corner surface 137.

[0074] The tip 45 shown includes an opening 140 on each side, which, when assembled onto the nose protrusion 19, substantially aligns with the keyhole 61 of the adapter 14 (FIG. 2). The keyhole 61 and the opening 140 together define a space for receiving the lock 17. Figure 1 The tip 45 has a lock opening 160. Each opening 140 is located in one of the sidewalls 144 to 147 of the tip 45 for receiving a lock 17. The opening 140 may be generally circular to mate with the illustrated keyhole 61 of the nose-shaped projection 19, but other configurations are also possible. For example, the sidewalls 144 to 147 may each contain a protruding recess for mounting a portion of the lock, but other configurations are also possible. Within the recess 70, each opening 140 opens on both its inner and outer sides and is further defined by an inner surface 162. The inner surface 162 may have a retaining structure 166 thereon. Although the tip 45 may be secured by only one lock 17, the illustrated tip 45 includes two lock openings 140, with openings along each sidewall 144 to 147 for mounting two locks 17; however, other configurations are also possible. Single or multiple locks may also be located in other surfaces of the wear-resistant parts and the base. In cases of asymmetrical wear (e.g., corner teeth), a single lock can be swapped to the other side. In cases with two openings 140, such as in U.S. Applications 16 / 888,389 and 16 / 125,636, the tip 45 may alternatively utilize one of the lock openings 140 for attachments, such as sensors, plugs, and / or end-of-life attachments, both of which are incorporated herein by reference in their entirety. Lock openings 140 are shown as identical, but other configurations are also possible.

[0075] As mentioned above, lock 17 is used to releasably secure the wear-resistant component to the base. When lock 17 is inserted into bore 160, it faces the interior 62 of bore 61 and engages at least the sidewall 162 of opening 140 of tip 45 to prevent tip 45 from dislodging from nose protrusion 19. Generally, lock 17 includes a body 165 for holding tip 45 to nose protrusion 19 and a collar for engaging a retaining structure 166 in the protrusion of tip 45, the retaining structure for securing lock 17 in bore 160 in both transport and locked positions. Lock 17 may be a lock comprising a pin and collar lock as described in US 9,222,243, the entire contents of which are incorporated herein by reference. Lock 17 may include: a transport position within the hole that allows lock 17 to remain in lock opening 140 when the nose protrusion 19 is installed; and a locking position that uses lock 17 in lock hole 61 of adapter 14 to lock tip 45 to adapter 14.

[0076] Many other lock designs can be used to secure wear-resistant components to the nose-shaped protrusion. For example, lock 17 can be a conventional sandwich pin construction, which is hammered into the component. This lock can also pass vertically or horizontally through a hole in the center of the nose-shaped protrusion and tip in a well-known manner.

[0077] exist Figures 12 to 20 In one example, the wear-resistant component 210 includes a toothed member 211 having a wear-resistant part or tip 245 releasably fixed to a nose-shaped protrusion 272 of a second wear-resistant part or intermediate adapter 214, which in turn is mounted on a support structure or base 212 of the earthmoving equipment.

[0078] Although the toothed member with an intermediate adapter is included in the illustrated example, the intermediate adapter may be omitted from the toothed member 211. For example, the tip may be directly mounted on an integral nose-shaped protrusion or a base adapter nose-shaped protrusion similar in shape to the nose-shaped protrusion 272. Additionally, a base shaped like the nose-shaped protrusion 272 may support other wear-resistant components, such as guards, wing guards, etc. Similarly, although the support structure shown is the lip of the bucket, the support structure could also be the front edge of the bucket sidewall, dredger cutterhead, roller, blade, etc. Lock 217 is used to releasably secure the toothed member to the base and releasably secure the tip to the intermediate adapter, for example, as disclosed in U.S. Patent 9,222,243 (incorporated herein by reference). In this example, the same type of lock is used in both cases, but different locks may also be used. For example, the lock is disclosed in U.S. Provisional Application 63 / 176,065, which is incorporated herein by reference.

[0079] In the illustrated example, mining edge 212 is essentially similar to Figure 2B The excavated edge 12'. The base 212 is shown as including a forward-projecting nose-like protrusion 219 as part of the casting lip, rather than a separately fixed adapter (see, for example, see...). Figure 2A However, the base adapter can replace the integral nose-shaped protrusion shown to be fixed to the excavation edge (as shown). Figure 2A (As shown in the diagram). The intermediate adapter 214 supports the ground-penetrating tip 245 on the excavation edge 212. The intermediate adapter 214 includes a forward-projecting nose-like protrusion 272 for mounting the tip 245 and a mounting end 274 for receiving the nose-like protrusion 219 of the excavation edge. In this example, the nose-like protrusion 219 and cavity 270 have the same design as nose-like protrusion 19 and cavity 70, but they can have different designs, including, for example, the nose-like protrusion and cavity of U.S. Patent 7,882,649, nose-like protrusions and cavities similar in design to nose-like protrusion 272 and cavity 274, etc.

[0080] refer to Figures 13 to 17The nasal protrusion 272 has a body 225, the body having a front portion 226, a rear portion 228, and a transition portion 227. Figure 16 The main body 225 extends rearward from the front portion 226 to the rear portion 228. In this example, the transition portion 227 extends vertically and horizontally, but for manufacturing and / or ease of release purposes, it may extend only in one direction (e.g., vertically), except for possible taper. The transition portion 227 is located between the front portion 226 and the rear portion 228 of the nose-like protrusion 272. The rear portion 228 is adjacent to the mixing region and transitions to the rear body of the intermediate adapter 214 defining the mounting cavity 270.

[0081] In the illustrated example, the front portion 226 includes front support surfaces 230, 231, 232, 233, 234 and a front support wall 236 transverse to the front support surfaces 230 to 234, but other variations are possible. More specifically, the front support surfaces include top support surfaces 230, 232, side support surfaces 231, 234, and bottom support surface 233. The front support surfaces 230 to 234 and the front wall 236 abut against complementary surface supports at the front of the mounting cavity or recess 270 in the second wear-resistant member 245.

[0082] The front wall 236 resists rearward load L3 (e.g.) Figure 1 (As shown in the illustration). Support surfaces 230 to 234 may abut against the complementary surface across the entire width and length, or a portion thereof, of the complementary surface in the tip. In the illustrated example, the front support surfaces 230 to 234 are generally planar, but they may be formed with curves, such as a wide convex or concave shape curved around an axial and / or lateral axis, or any combination thereof with a planar surface. The front support surfaces 230 to 234 extend rearward to the transition section 227.

[0083] Front support surfaces 230 to 234 extend rearward from front surface 236 and axially, substantially parallel to longitudinal axis 235, to help stabilize the support of the second wear-resistant component 245. The term "substantially parallel" is intended to include parallel surfaces as well as surfaces offset from the longitudinal angle at small angles (e.g., about 0 to 7 degrees) for manufacturing purposes and / or ease of removal. The front support surfaces are preferably offset axially in the rearward direction from longitudinal axis 235 at an angle of 5 degrees or less, and most preferably at an angle of 3 degrees or less. Longitudinal axis 235 is the longitudinal axis of the nose-shaped protrusion 272 and the mounting cavity 274 within the second wear-resistant component 245. Longitudinal axis 235 may be generally defined as the straight line along which the center of front wall 236 moves when the front wall is mounted into mounting cavity 274. Support surfaces 230 to 234, extending substantially parallel to the longitudinal axis, are sometimes also referred to herein as stabilizing surfaces. Stabilizing surfaces are intended to stabilize the wear-resistant component 245 mounted on nose-shaped protrusion 272 against vertical, lateral, and combined loads.

[0084] In the illustrated embodiment, the front wall 236 and the front portion 226 have a generally pentagonal shape, but other surfaces may be located at one or more corners. In some instances, the front wall may have other polygonal shapes. In the illustrated example, the front wall 236 is perpendicular to the longitudinal axis 235. In other instances, the front wall 236 may optionally be inclined relative to the longitudinal axis, preferably such that the front wall 236 forms an acute angle with the top surface 230, but other orientations are also possible. In the illustrated example, the front surface is planar, but it may be convex, concave, curved, or composed of angular segments.

[0085] exist Figure 17 In terms of orientation, the bottom surface 233 is substantially parallel to the horizontal plane. The top support surfaces 230 and 232 each converge downward toward each other in the lateral direction to create a pentagonal chamfer 237. In other embodiments, the nose-like protrusion 272 may be reversed, such that the top support surfaces 230 and 232 may be the bottom of the front portion 226, and wherein the surfaces that are directed in the opposite or inward direction converge upward (rather than downward as shown). In the illustrated embodiment, the side support surfaces 231 and 234 converge upward and laterally, but they may also converge vertically or downward.

[0086] Adjacent support surfaces 230 to 234 may be connected by a corner 237, which is generally circular, but other configurations are possible. In another example, surfaces 230 to 234 may meet at an edge. The corner 237 in the front portion 226 creates: an angle γ (e.g., 116 degrees) between adjacent support surfaces 231, 234 and support surface 233; an angle ε (e.g., 52 degrees) between support surfaces 231, 234 and support surfaces 230, 232; and an angle θ (e.g., 205 degrees) between the top support surfaces 230 and 232. Angles γ, ε, and θ may typically be in the range of 50 degrees to 230 degrees (within 2 ± degrees), but other examples outside this range are possible. The angle of the nose-like projection (i.e., support surfaces 230 to 234) and the overall front configuration can vary significantly. For example, one side of the support surfaces 230 to 234 may have different angles γ and ε than the other side, resulting in an uneven shape (e.g., an uneven or non-mirrorized pentagon around a vertical axis). In one such example, surfaces 230 to 234 may be uneven in length to better accommodate a lock on one side.

[0087] The rear portion 228 includes rear support surfaces 251, 252, 253, 254, and 255. The rear support surfaces 251 to 255 extend rearward from the transition portion 227 and include a top rear support surface 251, side rear support surfaces 252 and 254, and a bottom rear support surface 253 and 255. The rear support surfaces 251 to 255 are layered (i.e., widely spaced) relative to the front support surfaces 230 to 234 to enhance strength, removability, and operability. The rear portion 228 of the nose-like protrusion 272 may be aligned with a shape and orientation similar to the front portion 26 of the nose-like protrusion 19 (e.g., a downward-facing pentagon), but other configurations are also possible.

[0088] As discussed above, nose protrusions 19 and 272 each have a front and a rear portion. In nose protrusion 19, the bottom surface on the front portion and the top surface on the rear portion converge in a direction away from the longitudinal axis. In nose protrusion 272, the top surface on the front portion converges in a direction toward the longitudinal axis, while the bottom surface on the rear portion converges away from the longitudinal axis 235. Other variations are also possible. For example, the converging surfaces on the front portion may be on the top or bottom of the nose protrusion (or mounting cavity) and / or converge away from or toward the longitudinal axis. Similarly, regardless of the front portion design, the converging surfaces on the rear portion may be on the top or bottom of the nose protrusion (or mounting cavity) and / or converge away from or toward the longitudinal axis.

[0089] Support surfaces 251 to 255, together with front support surfaces 230 to 234, extend substantially parallel to the longitudinal axis 235 axially to assist in stabilizing and supporting the wear-resistant component 245; for example, said support surfaces, together with said front support surfaces, are offset rearward at a small angle from the longitudinal axis 35. Support surfaces 251 to 255, extending substantially parallel to the longitudinal axis, are sometimes referred to herein as stabilizing surfaces. Rear support surfaces 251 to 255 abut against corresponding surface supports in the mounting cavity 274 of the wear-resistant component 245, and together with front support surfaces 230 to 234, serve as stabilizing surfaces for the wear-resistant component 245. Front support surfaces 230 to 234, 236 abut against complementary surface supports in the mounting cavity 274 of the wear-resistant component 245 to resist vertical, lateral, rotational, and axial loads applied to the wear-resistant component 245 during excavation operations (e.g., as shown in the image). Figure 1 Various combinations of L1, L2, L3, and R1 seen in the text.

[0090] Like the front portion 226, the rear portion 228 preferably has a generally pentagonal shape. The rear portion 228 has a reverse orientation relative to the front portion 226 (e.g., rotated 180 degrees). Corner 237 is aligned with support surfaces 251 to 255 in the rear portion 228, and vice versa, corner 257 is aligned with the front support surfaces 230 to 234. In the illustrated embodiment, the rear support surfaces 251 to 255 are oriented 180 degrees relative to the orientation of the front support surfaces 230 to 234.

[0091] In the illustrated example, the front and rear portions 226, 228 each have their own downwardly converging support surfaces. These support surfaces may not be aligned at the same angle. (See reference) Figure 17 The bottom rear support surfaces 253 and 255 converge downwards towards each other, but other configurations are also possible. In one such example, the bottom rear support surfaces 253 and 255 may be rotated about a longitudinal axis in orientation such that they converge upwards and lie on the top surface. In this example, it is envisioned that surfaces 230 and 232 will be rotated to lie on the bottom surface. In the illustrated orientation, the top rear support surface 251 is substantially parallel to the horizontal plane. The side rear support surfaces 252 and 254 converge upwards, but other configurations are also possible. Adjacent support surfaces 251 to 255 may be connected by a corner 257, which is generally circular. The corner 257 generates: the angle α" between the top rear support surface 251 and the side rear support surfaces 252 and 254; the angle β" between the side rear support surfaces 252 and 254 and the bottom rear support surfaces 253 and 255; and the angle δ" between the bottom rear support surfaces 253 and 255. In one example, α", β", and δ" are substantially similar to α, β, and δ of the nose protrusion 19.

[0092] In another example, one side of the rear support surfaces 251 to 255 may have angles α" and β" different from the other side of the rear support surfaces 251 to 255, resulting in a non-uniform or non-mirror image shape around the vertical axis. In this case, the length of surfaces 251 to 255 may be non-uniform. In one such example, one or both of the support surfaces in the front and rear portions may have different lengths and / or corner angles on one side of the nose-like protrusion compared to the other side. Alternatively, the rear support surfaces 251 to 255 may be formed with curves (rather than straight lines), such as broad convex or concave curves around the longitudinal and / or transverse axes, as disclosed above with respect to the front support surfaces 230 to 234.

[0093] Transition portion 227 includes transition surfaces 240 to 244, 246 to 250, which preferably extend rearward axially at an angle greater than substantially parallel to the longitudinal axis to increase the strength and penetrating power of the nose-like protrusion. In the illustrated embodiment, the transition surfaces include top transition surfaces 240, 241, 242, side transition surfaces 243, 244, 246, 247, and bottom surfaces 248, 249, 250. Transition portion 227 transforms the support surfaces 230 to 234 in the front portion 226 into the corner surface 257 in the rear portion 228. Similarly, transition portion 227 transforms the corner surface 237 in the front portion 226 into the support surfaces 251 to 255 in the rear portion 228. In the illustrated example, the bottom corner surface 237 (also associated with the top tip of the pentagonal shape) is adjacent to the bottom transition surface 248 to transition to the bottom support surface 253, and so on.

[0094] One or both of the corresponding top transition surfaces 240, 241, 242 and bottom transition surface 250 may include a lock cutout portion 259 and a keyhole 261. The keyhole may be a blind hole. The cutout portion 259 allows the lock 217 to be positioned closer to the center of the top 245. This arrangement makes certain lock variations more ergonomic for operators installing and removing wear-resistant parts, and protects the lock from wear.

[0095] refer to Figures 18 to 20 The illustration shows a wear-resistant component 245, in the form of a apex, mounted on a nose-shaped protrusion 272, but the wear-resistant component may also have other configurations and / or purposes. In the illustrated embodiment, the wear-resistant component 245 includes a front working end 266 and a rear mounting end 274. Although the working end 266 is shown as a linear drill bit protruding from the mounting end 274, it need not be so; the drill bit may be offset from the longitudinal axis 35. The mounting end 274 is formed with a recess 270 that receives the nose-shaped protrusion 272 for supporting the wear-resistant component 245 on a ground work device. The recess 270 is formed by a front portion 294 and a rear portion 296, each having an internal top wall, bottom wall, and sidewalls. The rear portion 296 is adjacent to a second mixing region, which complements the mixing region of the nose-shaped protrusion 272. Preferably, the recess 270 has a shape complementary to the nose-shaped protrusion 272, but some variations may be included.

[0096] In one example, the socket 270 includes a plurality of front support surfaces 330 to 334 at its front portion 294. In the illustrated example, the front portion 294 of the socket 270 is generally pentagonal in shape and includes: a bottom support surface 333; top support surfaces 330, 332; and side support surfaces 331, 334 to match at least a portion of the front portion 226 of the nose-like protrusion 272, but other shapes are also possible. The front wall 298 also provides support. For example, while surfaces 330 to 334 are preferably planar, they may be convex, concave, curved, or composed of angular segments. Adjacent front support surfaces may be connected by corners 337, which are generally rounded. The length of each rearwardly extending support surface 330 to 334 may correspond to the front portion 226 of the nose-like protrusion 272, but other configurations are also possible. For example, the length of each support surface 330 to 334 may be less than the length of the front support surfaces 230 to 234. In this case, only a portion of the support surfaces 330 to 334 will engage at any given time. The front wall 298 may be inclined or perpendicular to the longitudinal axis 235 to complement the front wall 236.

[0097] The recess 270 includes a plurality of support surfaces 351 to 355 at its rear portion 296 or open end. In the illustrated example, the rear portion 296 of the recess 270 is generally pentagonal in shape and includes: bottom support surfaces 353, 355; a top support surface 351; and side support surfaces 352, 354 to mate with at least a portion of the rear portion 228 of the nose-shaped protrusion 272. For example, while surfaces 351 to 355 are preferably planar, they may be convex, concave, curved, or composed of angular segments. The bottom rear support surfaces 353, 355 each converge downward in the lateral direction at a 180-degree offset to the bottom corner 337 of the pentagon of the front portion 298. The bottom rear support surface 333 converges to the corner 357 at the rear portion 298 of the recess 270. The inclined support surfaces 330, 332 and 353, 355 are symmetrically offset by 180 degrees from each other, but they are inclined in the same direction (e.g., downward). Adjacent support surfaces 351 to 355 can be connected by a corner 357, which is generally rounded. The length and / or width of each support surface 351 to 355 may correspond to the support surfaces 251 to 255 of the rear portion 228 of the nose protrusion 272, but other configurations are also possible. For example, the length and / or width of each support surface 351 to 355 may be less than the length of the rear support surfaces 251 to 255. In this case, only a portion of the support surfaces 351 to 355 will engage at any given time. The rear support surfaces 351 to 355 define a cavity opening 274 at the rear end 274 of the tip 245 to receive the nose protrusion 272 of the intermediate adapter 214.

[0098] Preferably, the support surfaces 330 to 334, 351 to 355 in the tip 245 are designed to match the support surfaces formed on the nose protrusion 272; that is, if the support surfaces 230 to 234, 251 to 255 in the nose protrusion are deviated at an angle of about 2 degrees relative to the longitudinal axis 235, then the support surfaces 330 to 334, 351 to 355 of the socket 270 are also deviated at an angle of about 1 to 2 degrees relative to the longitudinal axis 235.

[0099] The top wall, bottom wall, and side walls of the socket 270 extend from the front portion 294 to the rear portion 296. The top wall, bottom wall, and side walls of the socket 270 generally converge toward the front portion 294 of the socket 270; significant variations are possible for the surfaces in the transition section, provided they generally transition from a larger rear portion to a smaller front portion. The top wall, bottom wall, and side walls transform the front support surfaces 330 to 334 in the front portion 294 into the corner surface 357 in the rear portion 296. Similarly, the top wall, bottom wall, and side walls transform the rear support surfaces 351 to 355 into the corner surface 337.

[0100] The illustrated tip 245 includes openings 340 at both the top and bottom, which generally align with the lock hole 261 of the adapter 214 when the tip 245 is assembled onto the nose-shaped protrusion 272. The lock hole 261 and the openings 340 together define a lock opening 261 for receiving the lock 217. Figure 12 As mentioned above, lock 217 is used to releasably secure the wear-resistant component to the base. Lock 217 may be a type of lock comprising a pin and a collar lock as described in US9,222,243, the entire contents of which are incorporated herein by reference.

Claims

1. A wear-resistant component for earthmoving equipment, comprising: A mounting cavity opening, located at the rear end of the wear-resistant component, is provided to accommodate a support base. The mounting cavity has a front and a rear portion. The front portion includes a first front support surface on the top or bottom side of the mounting cavity, and two second front support surfaces on the top or bottom side of the mounting cavity opposite to the first front support surface, the two second front support surfaces converging away from the first front support surface, wherein during earthmoving operations, the front support surfaces abut against complementary surfaces on the support base for support, and The rear portion includes a first rear support surface on the top or bottom side of the mounting cavity opposite to the first front support surface and two second rear support surfaces on the top or bottom side of the mounting cavity opposite to the first rear support surface, the second rear support surfaces converging away from the first rear support surface, wherein the rear support surfaces abut against complementary surfaces on the support base during earthmoving operations, wherein the front portion includes two side front support surfaces, each side front support surface extending between the first front support surface and one of the second front support surfaces.

2. The wear-resistant component according to claim 1, wherein the second front support surface in the front portion converges at an angle different from the second rear support surface in the rear portion.

3. The wear-resistant component according to claim 1, wherein the second front support surface converges downward and the second rear support surface converges upward.

4. A wear-resistant component for earthmoving equipment, the wear-resistant component comprising a mounting cavity opening at a rear end for axially receiving a support base, the mounting cavity comprising a front portion and a rear portion. The front portion includes (i) a front support surface extending around the periphery of the front portion, the front support surface including a top support surface, a bottom support surface converging in a direction away from the top support surface, and side support surfaces, each side support surface extending between one of the top support surface and the bottom support surface, and (ii) a front support wall at the front end of the mounting cavity between the top support surface, the bottom support surface, and the side support surfaces. The rear portion includes a rear support surface extending around the periphery of the rear portion, the rear support surface including a bottom support surface, a top support surface converging in a direction away from the bottom support surface, and a side support surface extending between the bottom support surface and the top support surface. During earthwork operations, the front support surface, the front wall, and the rear support surface abut against complementary surface supports on the support base.

5. The wear-resistant component according to claim 4, wherein the side support surface in the front portion is offset in a direction away from the top support surface in the front portion.

6. The wear-resistant component according to claim 4 or 5, wherein, In the front portion, (i) each of the side support surfaces forms a first angle with the top support surface, (ii) the bottom support surfaces form a second angle with each other, and (iii) each of the side support surfaces forms a third angle with one of the bottom support surfaces, and each of the first angle, the second angle and the third angle is an obtuse angle.

7. The wear-resistant component according to claim 4 or 5, wherein, In the front portion, (i) each of the side support surfaces forms a first angle with the top support surface, (ii) the bottom support surfaces form a second angle with each other, and (iii) each of the side support surfaces forms a third angle with one of the bottom support surfaces, and each of the first angle, the second angle and the third angle is in the range of 90-135 degrees.

8. The wear-resistant component according to claim 4 or 5, wherein, In the front portion, (i) each of the side support surfaces forms a first angle with the top support surface, the first angle being in the range of 108-112 degrees; (ii) the bottom support surfaces form a second angle with each other, the second angle being in the range of 128-132 degrees; and (iii) each of the side support surfaces forms a third angle with one of the bottom support surfaces, the third angle being in the range of 95-99 degrees.

9. The wear-resistant component according to claim 4 or 5, comprising a lock opening communicating with the mounting cavity to receive a lock for securing the wear-resistant component to the support base.

10. The wear-resistant component according to claim 4 or 5, wherein the mounting cavity includes a longitudinal axis extending in the direction in which the base is received into the mounting cavity, and each of the front support surface and the rear support surface extends axially substantially parallel to the longitudinal axis.

11. The wear-resistant component according to claim 4 or 5, wherein the mounting cavity includes a longitudinal axis extending in the direction in which the base is received into the mounting cavity, and each of the front support surface and the rear support surface extends axially at an angle of five degrees or less to the longitudinal axis.

12. The wear-resistant component according to claim 4 or 5, wherein the front portion and the rear portion each have a pentagonal cross-section perpendicular to the longitudinal axis of the mounting cavity.

13. A wear-resistant component comprising: A support base, which has a mounting section; A wear-resistant component for earthmoving equipment has a mounting cavity opening at the rear end of the wear-resistant component for accommodating a support base. The mounting cavity has a front portion and a rear portion. The front portion includes a first front support surface on the top or bottom side of the mounting cavity, two second front support surfaces on the top or bottom side of the mounting cavity opposite to the first front support surface, and a front support wall at the front end of the mounting cavity between the first and second front support surfaces. The two second front support surfaces face or are away from the first front support surface, facing the top or bottom side. The rear portion converges, wherein during earthmoving operations, the front support surface and the front support wall abut against complementary surfaces on the support base, and the rear portion includes a first rear support surface on the top or bottom side of the mounting cavity opposite to the first front support surface, and two second rear support surfaces on the top or bottom side of the mounting cavity opposite to the first rear support surface, the second rear support surfaces converging toward or away from the first rear support surface toward the central portion of the top or bottom side, wherein during earthmoving operations, the rear support surfaces abut against complementary surfaces on the support base; and A lock is used to secure the wear-resistant component to the support base.

14. The wear-resistant component of claim 13, wherein the mounting portion is a nose-shaped protrusion having a front portion and a rear portion, the front portion of the nose-shaped protrusion including a first front support surface of the nose-shaped protrusion on the top or bottom side of the nose-shaped protrusion, two second front support surfaces of the nose-shaped protrusion opposite to the first front support surface of the nose-shaped protrusion on the top or bottom side of the nose-shaped protrusion, and a front support wall of the nose-shaped protrusion at the front end of the nose-shaped protrusion, each of the two second front support surfaces of the nose-shaped protrusion converging toward or away from the first front support surface of the nose-shaped protrusion toward the central portion of the nose-shaped protrusion on the top or bottom side of the nose-shaped protrusion, wherein during earthmoving operations, the front support surface of the nose-shaped protrusion and the nose-shaped protrusion converge. The nose-shaped protrusion is supported by the front support surface and the front support wall of the mounting cavity of the wear-resistant component, and the rear portion of the nose-shaped protrusion includes a first rear support surface of the nose-shaped protrusion on the top or bottom side of the nose-shaped protrusion opposite to the first front support surface of the nose-shaped protrusion and two second rear support surfaces of the nose-shaped protrusion on the top or bottom side of the nose-shaped protrusion opposite to the first rear support surface of the nose-shaped protrusion. Two of the two second rear support surfaces of the nose-shaped protrusion converge toward the central portion of the nose-shaped protrusion facing away from or toward the first rear support surface of the nose-shaped protrusion and toward the top or bottom side. During earthmoving operations, the rear support surface of the nose-shaped protrusion is supported by the rear support surface on the mounting cavity of the wear-resistant component.

15. A wear-resistant component comprising: A support base, which has a mounting section; A wear-resistant component for earthmoving equipment includes a mounting cavity opening in the rear end of the wear-resistant component for receiving a support base. The mounting cavity includes a front portion and a rear portion. The front portion includes a top front support surface and two bottom front support surfaces converging away from the top front support surface. The rear portion includes a bottom rear support surface and two top rear support surfaces converging away from the bottom rear support surfaces. During earthmoving operations, the front support surfaces and the rear support surfaces abut against complementary surfaces on the support base. and A lock is used to secure the wear-resistant component to the support base.

16. The wear-resistant assembly of claim 15, wherein the support base includes a nose-shaped protrusion having a front portion and a rear portion, the front portion of the nose-shaped protrusion including a top front support surface of the nose-shaped protrusion and two bottom front support surfaces of the nose-shaped protrusion converging away from the top front support surface, and the rear portion including a bottom rear support surface of the nose-shaped protrusion and two top rear support surfaces of the nose-shaped protrusion converging away from the bottom rear support surfaces, wherein the front support surface and the rear support surface of the nose-shaped protrusion are supported abutting against the front support surface and the rear support surface of the mounting cavity.

17. A wear-resistant component for earthmoving equipment, comprising: A support base, which has a mounting section; A wear-resistant component includes a mounting cavity opening at its rear end for axially accommodating a support base, the mounting cavity comprising a front portion and a rear portion. (a) The front portion includes (i) a front support surface extending around the periphery of the front portion, the front support surface including a top support surface, a bottom support surface converging in a direction away from the top support surface, and side support surfaces, each side support surface extending between one of the top support surface and the bottom support surface, and (ii) a front support wall at the front end of the mounting cavity between the top support surface and the bottom support surface, and (b) The rear portion includes a rear support surface extending around the periphery of the rear portion, the rear support surface including a bottom support surface, a top support surface converging in a direction away from the bottom support surface, and a side support surface extending between the bottom support surface and the top support surface. (c) wherein, during earthmoving operations, the front support surface, the front wall, and the rear support surface abut against complementary surface supports on the support base; and A lock is used to secure the wear-resistant component to the support base.

18. The wear-resistant assembly of claim 17, wherein the support base includes a nose-shaped protrusion having a front portion and a rear portion, the front portion including a nose-shaped protrusion front support surface and a nose-shaped protrusion front corner extending around the periphery of the front portion of the nose-shaped protrusion between adjacent nose-shaped protrusion front support surfaces in the nose-shaped protrusion front support surface, and a nose-shaped protrusion front support wall at the front end of the nose-shaped protrusion between the top support surface and the bottom support surface, wherein during earthmoving operations, the nose-shaped protrusion front support surface and the nose-shaped protrusion front support wall abut against complementary surface supports on the mounting cavity, and the second portion including a nose-shaped protrusion rear support surface and a nose-shaped protrusion rear corner extending around the periphery of the rear portion of the nose-shaped protrusion between adjacent nose-shaped protrusion rear support surfaces, wherein during earthmoving operations, the nose-shaped protrusion rear support surface abuts against complementary surface supports on the mounting cavity of the wear-resistant component.

19. A bucket lip including a mounting portion for mounting a wear-resistant component thereon, the mounting portion comprising a front portion and a rear portion. The front portion includes a first front support surface on the top or bottom side of the mounting portion, two second front support surfaces on the top or bottom side of the mounting portion opposite to the first front support surface, and a front support wall at the front end of the mounting portion between the first and second front support surfaces. The two second front support surfaces converge away from the first front support surface and toward the center portion of the top or bottom side. During earthmoving operations, the front support surfaces and the front support wall abut against complementary surfaces on the wear-resistant component. The rear portion includes a first rear support surface on the top or bottom side of the mounting portion opposite to the first front support surface, and two second rear support surfaces on the top or bottom side of the mounting portion opposite to the first rear support surface, the second rear support surfaces converging away from the first rear support surface toward the central portion of the top or bottom side, wherein the rear support surfaces abut against complementary surface supports on the wear-resistant component during earthmoving operations.

20. A wear-resistant component comprising: A base defining a nose-shaped protrusion, the nose-shaped protrusion including a plurality of support surfaces extending axially substantially parallel to the longitudinal axis of the nose-shaped protrusion, the support surfaces including a plurality of front support surfaces formed generally along the distal end of the base and a plurality of rear support surfaces formed on the proximal end of the nose-shaped protrusion opposite to the distal end. A wear-resistant component defining a mounting cavity to be mounted on the base, the mounting cavity forming a support surface complementary to the support surface of the nose-shaped protrusion, the complementary support surface including a plurality of front support surfaces formed generally along the distal end of the mounting cavity, and a plurality of rear support surfaces formed on the proximal end of the mounting cavity opposite to the distal end, wherein the plurality of rear support surfaces of the base and the wear-resistant component are offset from the plurality of front support surfaces of the base and the wear-resistant component such that the front support surfaces of the base and the wear-resistant component are axially aligned with a corner in the rear portion of the base and the mounting cavity, wherein the front support surfaces include a top front support surface and two bottom front support surfaces converging away from the top front support surface, and two side front support surfaces, each side front support surface extending between the top front support surface and one of the two bottom front support surfaces; and A lock is used to secure the wear-resistant component to the base.

21. The wear-resistant assembly of claim 20, wherein the rear support surfaces of the base and the wear-resistant component are respectively axially aligned with the corners in the front portion of the base and the mounting cavity.

22. The wear-resistant assembly according to claim 20 or 21, wherein the plurality of front support surfaces and the plurality of rear support surfaces of the base and the wear-resistant component comprise at least three sides.

23. The wear-resistant assembly according to claim 20 or 21, wherein the plurality of front support surfaces and the plurality of rear support surfaces of the base and the wear-resistant component are non-uniform in length.

24. The wear-resistant assembly according to claim 20 or 21, wherein the plurality of front support surfaces and the plurality of rear support surfaces of the base and the wear-resistant component form a pentagon and a pentagon rotated 180 degrees about the longitudinal axis.

25. The wear-resistant assembly according to claim 20 or 21, wherein the plurality of front support surfaces and the plurality of rear support surfaces of the base and the wear-resistant component are separated by a transition surface on each of the base and the wear-resistant component.

26. The wear-resistant component according to claim 20 or 21, wherein the plurality of front support surfaces and the plurality of rear support surfaces have complementary surfaces, wherein the complementary surfaces are defined by at least one of a concave segment, a convex segment, a linear segment and / or a plurality of angular segments.

27. A wear-resistant component comprising: A base defining a nose-shaped protrusion comprising a plurality of support surfaces extending axially substantially parallel to a longitudinal axis of the nose-shaped protrusion, the support surfaces comprising a plurality of front support surfaces formed generally along a distal end of the base and a plurality of rear support surfaces formed on a proximal end of the nose-shaped protrusion opposite to the distal end, wherein the front support surfaces and the rear support surfaces of the base generally define a pentagonal shape, and the rear support surfaces of the base are positioned to be rotated 180 degrees relative to the front support surfaces of the base about the longitudinal axis. A wear-resistant component defining a mounting cavity to be mounted on the base, the mounting cavity having a support surface complementary to the support surface of the nose-shaped protrusion, the complementary support surface including a plurality of complementary front support surfaces formed generally along the distal end of the mounting cavity, and a plurality of complementary rear support surfaces formed on the proximal end of the mounting cavity opposite to the distal end. and A lock is used to secure the wear-resistant component to the base.

28. The wear-resistant component of claim 27, wherein the first support surface in the front portion converges at an angle different from that of the second support surface in the rear portion.

29. The wear-resistant component according to claim 27 or 28, wherein the front portion and the rear portion are pentagonal in shape.

30. The wear-resistant assembly of claim 29, wherein the rear support surface is axially aligned with the corner in the front portion of the mounting cavity.

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