Wear assembly

Abstract

A wear member for attachment to a digging edge of a bucket includes a front end and diverging leg portions extending rearwardly from the front end. Each leg portion includes an inner surface facing the digging edge, a rear wall, and a lock opening through which a lock is received. At least one of the diverging leg portions includes a front portion, a rear portion, and a coupling feature. The rear portion defines a stabilization zone including a forward-facing sidewall located forward of the rear wall.

Description

Technical Field

[0001] The present invention relates to a wear assembly, and specifically to an attachment of a wear member to the digging edge of a bucket or other excavator. Background Technology

[0002] The common practice is to secure wear components along the digging edge of the bucket or other excavator in the form of teeth and guards to protect the front lip from premature wear. The teeth protrude in front of the lip to easily penetrate and break up the ground to accumulate in the bucket. The guards are mounted on the lip between the teeth. As can be understood, wear components, and specifically the teeth, are typically used in harsh working conditions, where they bear very heavy loads and high levels of wear.

[0003] Digging teeth typically consist of several parts, including, for example, an adapter, a tip, and a lock. The adapter has a rear mounting end configured to attach to the front lip of the bucket, and a forward-projecting nose for mounting the tip. The tip is a tapered member with an end that penetrates the ground forward and a rearward-opening socket that receives the adapter nose. The lock is the part of a wear assembly that secures the tip to the adapter. Although the tip wears most frequently, the adapter also experiences wear and requires periodic replacement.

[0004] To enable on-site replacement, adapters that mechanically attach to the bucket lip have been developed. The most common type is known as the Whistler adapter (e.g., as shown in U.S. Patent No. 4,267,653 to Hahn and U.S. Patent No. 6,986,216 to Emrich and Briscoe). In these arrangements, the rear mounting end of the adapter includes a pair of forked legs spanning the bucket lip. Each leg of the adapter contains an opening aligned with a through-hole or keyway formed in the bucket lip. A multi-part lock, comprising a valve core and wedges, is inserted into the aligned openings and through-holes to secure the adapter in place. Summary of the Invention

[0005] In one embodiment of the invention, a wear member is provided that is securely attached to the excavation edge (e.g., the lip of a bucket) of a geotechnical equipment via a mechanical mechanism that facilitates easy installation and removal.

[0006] According to another embodiment of the invention, a wear member is provided for attachment to a digging edge, wherein the digging edge defines a keyway therethrough. The wear member includes a front end, bifurcated legs extending rearward from the front end, each leg including an inner surface facing the digging edge, a rear wall, and a lock opening for receiving a lock therefrom. At least one of the bifurcated legs further includes a front portion, a rear portion recessed relative to the front portion, and a coupling feature. The front portion defines a rearward sidewall adjacent to the rear portion. The rear portion defines a stabilizing region including a forward sidewall located anterior to the rear wall.

[0007] Optionally, one or both of the forked legs may include a post-joining structure.

[0008] Optionally, each leg includes an additional front sidewall that forms a support surface and partially defines a locking opening located at its rear end.

[0009] Optionally, the front portion defines a rearward sidewall adjacent to the rear portion.

[0010] Optionally, the rear engagement structure includes a slot that opens into the rear wall and inner surface of the leg and extends longitudinally to receive a boss on the digging edge, wherein the boss resists lateral forces. The boss on the digging edge may extend toward the inner sidewall, but does not actually touch the inner sidewall during normal operation. In practice, the inner sidewall may primarily serve as a gap surface rather than an abutment surface. Alternatively, the inner sidewall may be configured to abut the boss on the digging edge during normal operation.

[0011] Optionally, the rear engagement structure includes external opposing side surfaces of the leg, which are received and surrounded by complementary surfaces of retaining features on the excavation edge to resist longitudinal and lateral forces.

[0012] Optionally, one of the lock openings extends longitudinally between the front portion and the rear wall to receive the lock therefrom and to allow a portion of the lock to move longitudinally therein before the other portion of the lock is inserted.

[0013] Optionally, the rear portion is defined as a shoulder on each of the opposing longitudinal sides of the lock opening.

[0014] Optionally, at least one of the forked legs includes an upper leg.

[0015] Optionally, at least one of the forked legs includes a lower leg.

[0016] Optionally, another of the forked legs may also include a front portion and a rear portion that is recessed relative to the front portion.

[0017] Optionally, the front portion is located between the front end and the lock opening.

[0018] Optionally, the rear portion is recessed relative to the outer surface of the front portion.

[0019] Optionally, the rear portion at least partially surrounds the lock opening.

[0020] Optionally, the connection configuration includes a retaining surface on the front portion for engaging with a complementary connection portion on the wear cover, thereby preventing the wear cover from moving away from the wear member.

[0021] Optionally, the wear cover includes a protrusion for receiving within a recess in the wear member, thereby preventing the wear cover from moving in a rearward direction.

[0022] Optionally, the rear stabilization region includes a pair of recesses located on opposite sides of the lock opening.

[0023] Optionally, each recess includes a front sidewall and a longitudinal wall extending from the front sidewall and tapering toward the front portion. The longitudinal wall may not taper in any direction.

[0024] Optionally, the recess further includes a pair of upward shoulders, each shoulder being defined by a longitudinal side of the leg, one of the forward sidewalls, and one of the longitudinal walls.

[0025] Optionally, one or two shoulders taper towards the front end from the front sidewall, such that the width of one or both shoulders decreases towards the front end. The shoulders may not taper in any direction, or they may taper towards the rear end, such that the width of one or both shoulders decreases towards the rear end.

[0026] Optionally, the wear member has a forward-protruding nose for mounting another component.

[0027] Optionally, the wear component is selected from the group consisting of an adapter, a tip, and a shield.

[0028] Optionally, the forward support wall on the wear member engages with the rear surface of the lock received through the lock opening.

[0029] In another embodiment, the wear member for attachment to a digging edge includes a front end and forked legs extending rearward from the front end. Each of the legs includes an inner surface and a rear wall, the inner surface being oriented toward the digging edge. At least one of the legs has a lock opening therein for receiving a lock. At least one of the legs includes a front portion and a rear portion recessed relative to the front portion. The front portion includes a rearward sidewall adjacent to the rear portion to resist a wear cover that can be received in the recessed rear portion. The rear portion includes at least one forward sidewall located anterior to the rear wall, the at least one forward sidewall being adapted to engage the wear cover in the rear portion and resist rearward movement of the wear cover.

[0030] In another embodiment, the wear member for attachment to the excavation edge includes a front end and forked legs extending rearward from the front end. At least one of the legs defines a lock opening therein for receiving a lock, and a pair of recesses on each side of the lock opening, wherein each recess includes a forward wall for resisting rearward movement of the wear cover on the at least one leg.

[0031] In another embodiment, the wear member for a geotechnical device includes a pair of legs defining a cavity therebetween for receiving a base of the device. Each of the legs includes an inner surface facing the base, an opposing outer surface facing away from the base, and a through-hole opening in the inner and outer surfaces. The opening in each leg has a rear end defined by an end surface extending away from the base, one end surface in one leg extending from the inner surface to the outer surface, and the other end surface in the other leg extending from the inner surface to a step approaching the outer surface.

[0032] In another embodiment, the wear member for a geotechnical device includes at least one leg having an inner surface facing the base, an outer surface, a front end, and a rear end, wherein the rear end of the leg includes a mounting recess in the outer surface for mounting a wear cap.

[0033] According to another embodiment of the invention, a wear member for attachment to the digging edge of a bucket is provided, the wear member including a front end, bifurcated legs extending rearward from the front end, and a lock opening therein for receiving a lock, at least one of the legs defining a recessed frame thereon for receiving a wear cover.

[0034] Wear-resistant components may include protective covers.

[0035] According to another embodiment of the invention, a wear assembly is provided for attachment to a digging edge of a bucket, wherein the digging edge defines a keyway therethrough. The wear assembly includes a wear member according to the above embodiments and any desired optional features as described above, a rear wear cover mounted on a rear portion of the wear member, a lock including a cooperating valve core, and a wedge mounted in a lock opening defined by the wear member, and retains the rear wear cover on the wear member.

[0036] Optionally, the wear cover is mounted on the recessed rear portion of the wear member and defines a longitudinally extending opening that aligns with the locking opening, as well as a contoured lower engagement surface.

[0037] Optionally, the contoured lower engagement surface includes a front engagement feature, an engagement wing, and a rear boss feature.

[0038] Optionally, the front engagement feature includes a protrusion extending beyond an upper wear surface opposite a contoured lower engagement surface, operable to engage with a complementary recess on the front portion of the wear member.

[0039] Optionally, the front portion connection feature includes a recess operable to engage with a complementary protrusion on the front portion of the wear member.

[0040] Optionally, each of the engagement wings includes a rearward wall for abutting a corresponding forward sidewall positioned rearward on the wear member, and a downward surface aligned with a corresponding upward shoulder defined by the wear member.

[0041] Optionally, each of the engagement wings tapers toward the front portion of the wear member.

[0042] Optionally, the rear boss feature includes a rearward wall for alignment with a front sidewall defining a locking opening on the wear member.

[0043] Optionally, the rear boss feature further includes a tongue that extends toward the lock opening and is operable to be located below a corresponding protruding arm of the valve core, such that the valve core prevents the rear wear cover from moving in the upward direction.

[0044] In another embodiment, the wear assembly for a geotechnical device includes: a wear member operable to engage with a digging edge of the geotechnical device; a wear cover configured to be mounted on the wear member; and a lock securing the wear member to the digging edge and the wear cover to the wear member.

[0045] In another embodiment, the wear assembly for attachment to a digging edge includes a wear member comprising a front end and forked legs extending rearward from the front end. Each of the legs includes an inner surface facing the digging edge and a rear wall. At least one of the legs has a lock opening therein for receiving a lock. A wear cover is mounted on the wear member. The lock is located in the lock opening to retain the wear cover on the wear member and to retain the wear member on the digging edge.

[0046] In another embodiment, the wear assembly for attachment to a digging edge includes a wear member comprising a front end and forked legs extending rearward from the front end. Each of the legs includes an inner surface facing the digging edge, an outer surface opposite the inner surface, and a rear wall. At least one of the legs includes a recess in the outer surface, and at least one of the legs has a lock opening therein for receiving a lock. A wear cover is mounted in the recess on the wear member. The lock is engaged in the lock opening to retain the wear member on the digging edge.

[0047] In another embodiment, the wear assembly for a geotechnical device includes: a wear member operable to be coupled to the excavation edge of a bucket or other excavator; a wear cover configured to be mounted on the wear member; and a lock that secures the wear member to the excavation edge and also secures the wear cover to the wear member.

[0048] In another embodiment, a wear assembly for a geotechnical device includes a wear member having a pair of legs defining a cavity therebetween for receiving a base of the device. Each of the legs includes an inner surface facing the base, an opposing outer surface facing away from the base, and a through-hole opening in the inner and outer surfaces that is generally aligned with a keyway in the base. The hole in each leg has a rear end defined by an end surface extending away from the base. A lock for securing the wear member to the base includes a valve core and a wedge. The valve core has a rearwardly supporting surface to contact the end face in the hole to resist forward movement of the respective leg during use, without an arm at each end of the valve core to contact a stepped surface between the end face and the outer surface of each of the legs.

[0049] In another embodiment, the wear assembly for a geotechnical device includes: a wear member having at least one leg with an inner surface facing the base of the device; and a lock having a wedge and a valve core to secure the wear member to the base of the device, wherein the wedge comprises two threaded tapered portions and a cylindrical portion between the tapered portions.

[0050] According to another embodiment of the invention, a wear cover is provided as part of a wear assembly together with a wear member, the rear wear cover defining an upper wear surface, a contoured lower engagement surface opposite the upper wear surface, and a longitudinally extending opening extending through the upper wear surface and the lower engagement surface, wherein the contoured lower engagement surface includes a front parting feature, an engagement wing, and a rear boss feature.

[0051] Optionally, the front connection feature includes a protrusion extending beyond the upper wear surface and operable to engage with a complementary structure on the wear member.

[0052] Optionally, the front connection feature includes a recess operable to engage with a complementary protrusion on a wear member.

[0053] Optionally, the front connection feature is located generally centered at the front portion of the rear wear cover.

[0054] Optionally, each of the engagement wings includes a rearward wall for abutting a corresponding forward sidewall positioned rearward on the wear member.

[0055] Optionally, each of the engagement wings tapers toward the front portion of the wear member in mutually orthogonal directions.

[0056] Optionally, the rear boss feature includes a rearward wall for alignment with a front sidewall that partially defines a locking opening on the wear member.

[0057] Optionally, the rear boss feature further includes a tongue that extends toward the lock opening and is operable to be located below a corresponding protruding arm of the valve core, such that the valve core prevents the wear cover from moving in the upward direction.

[0058] In another embodiment, a wear cover for use with a wear member attached to the digging edge of a bucket includes: an upper wear surface; a lower surface opposite the upper wear surface to engage the wear member; an opening extending through the upper wear surface and the lower engagement surface; a front coupling configuration engaging the wear member to retain the wear cover on the wear member; and a rear boss engaging a lock to retain the wear cover to the wear member.

[0059] In another embodiment, a wear cover for use with a wear member to protect its rear portion includes an upper surface, a lower surface, a locking hole extending through the upper and lower surfaces, for engaging the wear member and thereby retaining the wear cover to the front connecting portion of the wear member.

[0060] In another embodiment, a wear cover for use with a wear member attached to a digging edge includes an upper wear surface, a lower surface opposite the upper wear surface to engage the wear member, and engagement wings extending inwardly from the upper wear surface, each engagement wing including a rearwardly supporting wall to engage a complementary forward sidewall on the wear member.

[0061] In another embodiment, a wear cover for use with a wear member to protect its rear portion defines an upper surface, a contoured lower engagement surface, and a longitudinally extending opening extending through the upper engagement surface and the lower engagement surface, wherein the contoured lower engagement surface includes a front portion coupling configuration to engage the wear member and thereby retain the wear cover to the wear member.

[0062] According to another embodiment, a wear cover is provided for use with a wear member to protect its rear portion, the wear cover defining an upper surface, a contoured lower engagement surface, and a longitudinally extending opening extending through the upper engagement surface and the lower engagement surface, wherein the contoured lower engagement surface includes a front portion connection feature.

[0063] Optionally, the contoured lower engagement surface further includes engagement wings and rear boss features.

[0064] According to another embodiment of the invention, a wear assembly is provided, the wear assembly including a wear member for attachment to a digging edge of a bucket, and a rear wear cover mechanically attached to the wear member, wherein the digging edge defines a keyway therethrough. The wear member includes a front end and bifurcated legs extending rearward from the front end. Each leg includes an inner surface facing the digging edge, a rear wall, and a lock opening therefrom for receiving a lock. At least one of the bifurcated legs further includes a front portion, a rear portion recessed relative to the front portion, and a coupling feature. The rear portion defines a stabilization region including a forward sidewall located anterior to the rear wall. The wear cover includes: a longitudinally extending opening extending therebetween and calibrated with the lock opening during use; a front portion coupling feature operable to engage the coupling feature; and an engagement wing operable to engage the stabilization region, wherein the wear cover can be mechanically attached to the wear member by a lock for securing the wear member to the digging edge.

[0065] In another embodiment, a wear assembly for a geotechnical device includes: a wear member having at least one leg with an inner surface facing the base of the device; a wear cover covering at least a portion of the wear member; and a lock for securing the wear cover to the wear member and the wear member to the base.

[0066] In another embodiment, a wear assembly for a geotechnical device includes: a wear member having a pair of legs, each leg having an inner surface facing a base of the device; a first wear cover covering at least a portion of one of the legs; a second wear cover covering at least a portion of the other leg; and a lock for securing at least one of the wear covers to the wear member and the wear member to the base.

[0067] In another embodiment of the invention, a wear assembly is provided, the wear assembly comprising: a wear member operable to securely engage with a digging edge of a bucket or other excavator; a component mounted on the wear member; and a lock for securing the wear member to the digging edge and also securing the component to the wear member.

[0068] Optionally, the lock includes a multi-part lock. The multi-part lock may include multiple individual components that can be coupled and decoupled. Alternatively, the multi-part lock may include multiple components that are coupled together but can move relative to each other to increase or decrease one or more external dimensions of the multi-part lock.

[0069] Optionally, the wear component includes an adapter.

[0070] Optionally, the adapter may define a hole therethrough for alignment with a hole defined by the excavation edge, and a lock may be installed in the adapter and the hole in the excavation edge.

[0071] Optionally, components mounted on the adapter include wear covers, such as rear wear covers.

[0072] Optionally, the wear component includes a protective cover.

[0073] Optionally, components mounted on the shield include wear covers.

[0074] Optionally, the component may surround a hole defined by the wear member.

[0075] According to another embodiment of the invention, a valve core is provided for releasably fastening separable components together, the separable components defining a locking opening for receiving the valve core, the valve core having an elongated body extending along a body axis from a head portion to a leg portion, and including: (i) a concave recess defined by its front side; (ii) a contoured surface on its rear side; (iii) a pair of arms at the head portion and extending away from the body axis on the rear side; and (iv) a pair of shoulders at or near the head portion and extending between the front and rear sides.

[0076] Optionally, the contoured surface on the rear side includes a beveled member located below one of the two arms, and a support surface on the leg portion for engaging with the excavation edge.

[0077] Optionally, the contoured surface on the rear side includes a head rear surface for engaging with the wear member.

[0078] Optionally, the leg portion is substantially free of any protrusions, so that the valve core can be inserted into the lock hole before it is fully inserted, without the leg portion engaging with the excavation edge or wear member.

[0079] Optionally, at the end opposite the head portion, the leg portion includes an arm extending away from the body axis on the rear side to engage with a complementary recess in or at least partially defined by the wear member.

[0080] Optionally, the concave recess on the front side defines a positive thread for engagement with a complementary concave thread on the wedge.

[0081] Optionally, the concave recess on the front side defines a recessed thread for engagement with a complementary positive thread on the wedge.

[0082] Optionally, as the concave recess extends toward the lower section of the leg portion, the concave recess on the front side defines an outer surface that is generally parallel to the body axis. Alternatively, the concave recess on the front side defines an outer surface that is (i) generally parallel to the body axis for a portion of its length; (ii) angled toward the body axis for a portion of its length; and optionally (iii) generally parallel to the body axis for a portion of its length, since the concave recess extends toward the lower section of the leg portion.

[0083] Optionally, the lower section defines a limiting stop, which extends away from the main body axis and protrudes into a concave recess to prevent the wedge-shaped member from protruding beyond the limiting stop.

[0084] Optionally, the support surface is inclined away from the body axis as it extends to the insertion end of the valve core.

[0085] Optionally, the pair of shoulders are formed on either side of the lower arm of the pair of arms and at or above the lower arm of the pair of arms.

[0086] In another embodiment, a valve core for releasably securing a wear member to a base for a geotechnical device, the wear member and the base cooperatively defining a locking opening for receiving the valve core, the valve core including an elongated body extending along a body axis. The body includes a head, legs extending from the head, a front side, a rear side, and a pair of arms extending along the body axis at the ends and from the head and away from the rear side.

[0087] According to another embodiment of the invention, a wedge is provided for releasably fastening separable components together, the separable components defining a locking opening for receiving the wedge, the wedge comprising: an upper conical portion, a lower conical portion, and a central cylindrical portion located between the upper conical portion and the lower conical portion; the upper conical portion and the lower conical portion defining external threads.

[0088] Optionally, the diameter of the central cylindrical portion matches the diameter of the lowest portion of the upper conical portion and the diameter of the highest portion of the lower conical portion.

[0089] Optionally, the external thread includes a negative thread recessed therein.

[0090] Optionally, the truncated conical portions have the same outer surface cone angle.

[0091] Optionally, the cylindrical portion is unthreaded and not tapered.

[0092] Optionally, a relatively wide helical section is formed between adjacent helical groove sections of the external thread.

[0093] Optionally, the helical section defines a first bearing surface to contact a separable component and an opposing second bearing surface to contact another separable component, thereby resisting loads between the wedge and the component.

[0094] In another embodiment, a wedge for releasably securing a wear member to a base for a geotechnical device, the wear member and the base cooperatively defining a locking opening for receiving the wedge, the wedge including an upper conical portion, a lower conical portion, and a central cylindrical portion located between the upper and lower conical portions, wherein at least one of the upper and lower conical portions includes threads.

[0095] These and other embodiments of the invention will become apparent from the following description, which is given by way of example only, with reference to the accompanying drawings. Attached Figure Description

[0096] Figure 1 This is a perspective view of a wear assembly mounted on a lip edge according to an embodiment of the present invention.

[0097] Figure 2 It is along Figure 1 The perspective cross-sectional view of the portion intercepted by line 2-2 in the figure.

[0098] Figure 3 yes Figure 1 Exploded perspective view of the worn assembly and lip portion.

[0099] Figure 4 yes Figure 1 Side view of the worn assembly.

[0100] Figure 5 yes Figure 1 A front view of the worn assembly.

[0101] Figure 6 It comes from Figure 1 Plan view above the wear assembly.

[0102] Figure 7 It comes from Figure 1 A plan view below the wear assembly.

[0103] Figure 8 It corresponds to Figure 2 The view shown is a simplified side cross-sectional view (without any crosshairs).

[0104] Figure 9A and 9B yes Figure 1 A simplified view of a portion (lip boss) of the wear assembly.

[0105] Figure 10 yes Figure 1 Front perspective view of a portion of the wear assembly (keyway insert).

[0106] Figure 11 It comes from Figure 10 Plan view above the keyway insert.

[0107] Figure 12 yes Figure 10 Front view of the keyway insert above.

[0108] Figure 13 It comes from the formation Figure 1 A front perspective view above the wear component (in the form of an adapter), which is part of the wear assembly.

[0109] Figure 14 yes Figure 13 Side view of the adapter.

[0110] Figure 15 yes Figure 13 Top view of the adapter.

[0111] Figure 16 It comes from Figure 13 The rear perspective view below the adapter.

[0112] Figure 17 yes Figure 13 Rear view of the adapter.

[0113] Figure 18 yes Figure 13 Front view of the adapter.

[0114] Figure 19 It comes from Figure 13 The rear perspective view above the adapter.

[0115] Figure 20 It comes from Figure 1 A front perspective view above another part of the wear assembly (rear wear cover).

[0116] Figure 21 yes Figure 20 Side view of the rear wear cover.

[0117] Figure 22 yes Figure 20 Top view of the rear wear cover.

[0118] Figure 23 yes Figure 20 A bottom view of the rear wear cover.

[0119] Figure 24 yes Figure 20 Front view of the rear wear cover.

[0120] Figure 25 yes Figure 20 Rear view of the worn component.

[0121] Figure 26 It comes from Figure 1 Rear perspective view above another part of the wear assembly (the valve core of the multi-part lock).

[0122] Figure 27 It comes from Figure 26 Front perspective view of the valve core from above.

[0123] Figure 28 yes Figure 26 Front view of the valve core.

[0124] Figure 29 yes Figure 26 Rear view of the valve core.

[0125] Figure 30 It comes from Figure 26 Rear perspective view of the valve core from below.

[0126] Figure 31 yes Figure 26 Side view of the valve core.

[0127] Figure 32 It comes from Figure 26A plan view of the valve core from below.

[0128] Figure 33 It comes from Figure 26 A plan view of the valve core from above.

[0129] Figure 34 yes Figure 1 A front view of another part of the wear assembly (a wedge-shaped piece used with the valve core in a multi-part lock).

[0130] Figure 35 Is with Figure 26 valve core connection Figure 34 Side view of the wedge-shaped part.

[0131] Figure 36 It comes from and Figure 26 valve core connection Figure 34 A plan view above the wedge-shaped part.

[0132] Figure 37 Is with Figure 26 valve core and Figure 10 keyway insert connection Figure 34 Side view of the wedge-shaped part.

[0133] Figure 38 During installation Figure 20 The rear wear cover and insert Figure 34 Before the wedge Figure 8 An enlarged view of a portion of the cross-sectional view of the wear assembly shown.

[0134] Figure 39 Is with Figure 38 Similarly, but during installation Figure 20 During the wear and tear period and insertion Figure 34 The view before the wedge.

[0135] Figure 40 Is with Figure 38 and 39 Similarly, but during installation Figure 20 After the wear cover was removed and inserted Figure 34 The view before the wedge.

[0136] Figure 41 During installation Figure 20 The rear wear cover and insert Figure 34 After the wedge Figure 8 A simplified side view of a magnified portion of the cross-sectional view (represented by loop A).

[0137] Figure 42 Is as Figures 26 to 33 Front view of the stepped valve core, a replacement for the valve core.

[0138] Figure 43 It comes from Figure 42 Front perspective view of the stepped valve core above.

[0139] Figure 44 Is as Figures 10 to 12 Rear perspective view of a stepped keyway insert, which is a substitute for the keyway insert.

[0140] Figure 45 Is as Figure 34 Front view of the stepped wedge, a substitute for the wedge.

[0141] Figure 46 It comes from Figure 43 stepped valve core, Figure 45 stepped wedge and Figure 44 An exploded perspective view above the stepped keyway insert.

[0142] Figure 47 It comes from Figure 43 stepped valve core, Figure 45 stepped wedge and Figure 44 An exploded perspective view above the stepped keyway insert.

[0143] Figure 48 Is with Figure 43 stepped valve core and Figure 44 Stepped keyway insert connection Figure 45 Side view of the stepped wedge-shaped component.

[0144] Figure 49 This is an exploded perspective view of a wear assembly adjacent to the lip portion according to yet another embodiment of the present invention.

[0145] Figure 50 It is installed on the lip edge. Figure 49 A perspective view of the worn assembly.

[0146] Figure 51 yes Figure 49 Front perspective view of a portion (cover) of the wear assembly.

[0147] Figure 52 It comes from Figure 51 A plan view above the protective shield.

[0148] Figure 53 yes Figure 51 Front view of the protective shield.

[0149] Figure 54 yes Figure 49 Front perspective view of another part of the wear assembly (wear cover).

[0150] Figure 55 It comes from Figure 54 A plan view above the worn cover.

[0151] Figure 56 yes Figure 54 Front view of the worn cover.

[0152] Figure 57 yes Figure 49 Front perspective view of another part of the wear assembly (multi-part lock).

[0153] Figure 58 It comes from Figure 57 A plan view above the multi-part lock.

[0154] Figure 59 yes Figure 57 Front view of a multi-part lock.

[0155] Figure 60 yes Figure 57 A front perspective view of a multipart lock.

[0156] Figure 61 It comes from Figure 50 A plan view above the worn assembly and lip portion.

[0157] Figure 62 It is along Figure 61 Front cross-section view of line 62-62.

[0158] Figure 63 It is during insertion Figure 57 During the multi-part lock period along Figure 61 Simplified enlarged cross-sectional view of line 62-62. Detailed Implementation

[0159] First refer to Figures 1 to 8 The accompanying drawings illustrate a wear assembly 10 and its various portions according to an embodiment of the invention. The drawings are simplified, and some drawings have reduced details to facilitate understanding and prevent visual clutter.

[0160] exist Figures 1 to 8 In this example, the wear assembly 10 is mounted on the lip 12 of the bucket. However, the wear assembly can be mounted on other excavation edges and / or other geotechnical equipment.

[0161] exist Figure 1 The diagram illustrates three mutually orthogonal axes. These axes include the longitudinal (forward and backward) axis (denoted as LONG), the transverse (side-to-side) axis (denoted as LAT), and the vertical (or up-down) axis (denoted as LEV). As used herein, forward and backward are generally relative to each other. Figure 1The vertical axis is used as shown. Similarly, up and down are used to identify the direction along the vertical axis, for example, when the lip edge is as shown. Figure 1 When facing the center.

[0162] The wear assembly 10 includes a wear member 14 (in the form of an adapter in this embodiment) mounted to the lip 12 and a tip or end 16 mounted on the front end of the adapter 14. The wear assembly 10 further includes an optional front wear cover 20, an optional rear wear cover 22, and a lock 24 that secures the adapter 14 to the lip 12, and simultaneously secures the wear cover 22 to the adapter 14 when the rear wear cover 22 is used. Although an example wear assembly is shown, teeth with other designs can be used. For example, an intermediate adapter could be provided, other types of locks could be used, etc.

[0163] For ease of discussion, this document discloses the mounting of the adapter 14 to the lip 12 of the bucket. However, in other embodiments, the wear member 14 may be a guard, wing guard, solid tip, wear plate, etc., and the support structure may be the digging edge on other equipment, such as a dredging head, roller, blade, etc.

[0164] In this embodiment, the lip 12 defines the digging edge of the bucket or handle of the cable shovel and includes a leading edge surface 30, an inner surface 32, and an outer surface 34. A through-hole or keyway 36 (in...) Figure 3 (Best viewed in the middle) is set in the lip 12 through the inner surface 32 and the outer surface 34.

[0165] The leading edge surface 30 is shown as a curved (or semi-circular) surface to accommodate a portion of the adapter 14, but other configurations are possible. The leading edge surface 30 may define protrusions or recesses for (respectively) engaging with complementary recesses or protrusions of the adapter 14.

[0166] Although only a small portion of the lip 12 is shown in the accompanying drawings, the lip 12 may include a series of through holes 36 for mounting other teeth onto the bucket. Various configurations (not shown) may also be provided between the through holes 36 for mounting guards. Different shapes and configurations of the keyway 36 are also possible. The digging edge may also extend upward from the lip along the leading edge of the bucket sidewall and may be equipped with a wing guard that optionally features the characteristics of the adapter or guard embodiments disclosed herein.

[0167] The lip 12 further includes a stabilizing system 40. In the illustrated embodiment, the stabilizing system 40 includes an upper support or boss 42a, a lower support or boss 42b, and a keyway insert 44; however, other configurations including more or fewer components and components with shapes different from those shown are possible. Any or all of these components may be omitted.

[0168] The stabilization system 40 increases the strength and / or stability of the wear member 14 on the lip 12, thereby resulting in a longer service life of the wear member 14 and / or the lip 12 and / or reduced maintenance requirements for the lip 12.

[0169] In the illustrated embodiment, the upper boss 42a, the lower boss 42b, and the keyway insert 44 are welded together (in... Figures 1 to 8 (Marked as "W") Secure to the bucket lip 12.

[0170] In other embodiments, the stabilization system may include other components. In one such example, one or more bosses or supports may be provided on the leading edge surface 30 of the lip 12.

[0171] In the illustrated embodiment, bosses 42a, 42b are secured to a lip 12 located behind and aligned with the through-hole 36. Preferably, the upper boss 42a is secured to extend along the inner surface 32 of the lip 12, and the lower boss 42b is secured to extend along the outer surface 34 of each through-hole 36. However, a single boss on the inner surface 32 (or outer surface 34) may be used, or alternatively, the boss may be omitted. One or more bosses may alternatively or additionally be secured to the lip between the leading edge surface 30 and the through-hole 36. Multiple spaced bosses or supports may be provided on the exterior of each adapter leg on one or both sides of the lip, instead of (or additionally) a central boss received in the adapter legs 86a, 86b.

[0172] Although bosses 42a and 42b are preferably welded to the lip 12, the bosses may be formed as part of the lip 12 or otherwise fixed. Bosses 42a and 42b are preferably cast from an alloy harder than the lip 12 to help reduce the wear rate and retention rate of the lip 12, but various alloys with the same or lower hardness may be used.

[0173] In this embodiment, the bosses 42a and 42b are identical, but are mounted on opposite surfaces 32 and 34 of the lip 12 such that the bosses are mirror images of each other; in other embodiments, if the lower boss is present, it may have a different configuration than the upper boss.

[0174] Now will also refer to Figure 9A and 9B Each of the bosses 42a, 42b shows a body 50 that can be housed in a slot of the adapter and a rear member 62 behind the adapter.

[0175] In the illustrated embodiment, the body 50 defines a central base 52 and flange shoulders or tracks 54 extending laterally along each side of the central base, thereby providing a T-shaped configuration. The rear member 62 includes one or more abutment surfaces 56 for abutting the rear end of the adapter 14 during excavation, i.e., to resist applied loads and rearward displacement of the adapter legs, and thereby reduce the risk of adapter breakage. Figure 1 , 3 In Figures 4 and 8, the weld seam is shown and marked with a “W”. Each boss 42 may be similar to the boss described in U.S. Patent No. 6,986,216, but may use variations of the design shown therein.

[0176] The adjacent surface 56 may contain one or more inserts 58 for additional hardness and / or other desired properties.

[0177] The inner side of track 54 defines a fixing surface 60, which generally faces lip 12 to secure adapter 14 to lip 12 and / or resist vertical unfolding of adapter legs. Track 54 is preferably fixed to an adjacent surface 56 for support. Track 54 may have a wedge shape or other shape to support adapter legs. Alternatively, the track may be omitted or replaced with an alternative support.

[0178] Although the bosses 42a and 42b have a single-piece construction in this embodiment, the bosses may be defined by multiple parts that are joined together or individually fixed to the lip. Furthermore, the body 50 and / or the rear member 62 may be used without the other. In the illustrated example, the rear member 62 is formed as part of its respective bosses 42a and 42b, but in other examples, the bosses 42a and 42b and the rear member 62 may be formed as separate pieces, or all may be formed as part of the lip 12, which can be achieved by casting or manufacturing.

[0179] Now will also refer to Figures 10 to 12 The accompanying drawings show the keyway insert 44 in more detail.

[0180] like Figure 10 As best seen, the keyway insert 44 has a generally C-shaped structure, having a central body 70 and an inner arm 72 and an outer arm 74 extending therefrom.

[0181] In the illustrated embodiment, each of the arms 72, 74 includes a central projection 72a, 74a that extends along its respective arm 72, 74 and defines a recess 72b, 74b on either side thereon to receive weld material (e.g., weld seam material). Figure 3 (As shown in the diagram). The inner and outer arms 72 and 74 respectively cover and are welded to the inner surface 32 and outer surface 34 of the lip 12. Other configurations and / or fixed arrangements are possible.

[0182] The rear surface 76 of the central body 70 is arcuate to accommodate the front side of the wedge (described below). While the rear surface 76 is preferably unthreaded, it may optionally contain threads to engage the wedge instead of (or in addition to) the valve core 180. Other shapes of the rear surface are possible, such as non-arc concave or flat surfaces (specifically if other types of wedges are used, such as hammer- or bolt-driven wedges).

[0183] The keyway insert 44 may have a shape different from the shape described. For example, a shape similar to that shown in U.S. Patent No. 6,986,216 may be used, or an alternative shape may be used.

[0184] Compared to using only the lip 12 without the keyway 44, the keyway insert 44 provides a longer and more deformation-resistant support surface capable of supporting the wedge. The arms 72 and 74 may be the same or different in length and may include plug welds. Arms 72 and 74 may be a single piece or composed of several parts (e.g., the outer arm 74 may be composed of two parts). Arms 72 and 74 may be longer and extend further from the through-hole 36, even reaching the leading edge surface 30. With the use of longer arms (or for other reasons), one or both of arms 72 and 74 may be separate components welded to the lip 12, separate from the central body 70.

[0185] Arms 72 and 74 may optionally provide additional side support for adapter 14, but may be used to support only keyway insert 44.

[0186] For more specific reference Figures 13 to 19 The adapter 14 will now be described. The adapter 14 supports the tip 16 and secures it to the lip 12.

[0187] The adapter 14 has a front end 80 and a rear end 82. The front end 80 includes a forward-projecting nose 84 for mounting a land-penetrating tip 16. A pair of forked legs 86a, b extend longitudinally from the front end 80 and cross the lip 12. The upper leg 86a is positioned to engage the inner surface 32 of the lip 12, and the lower leg 86b is positioned to engage the outer surface 34 of the lip 12.

[0188] Each leg 86a, 86b includes an inner surface 88a, 88b facing the lip 12 and defines a rear wall 90a, 90b. In this embodiment, the legs 86a, 86b are of equal (or substantially equal) length (but in other embodiments, the lengths of the legs 86a, 86b may be different). Slots 92a, 92b are optionally provided in each of the legs 86a, 86b to open in the rear walls 90a, 90b and the inner surfaces 88a, 88b to receive a corresponding boss 42a, 42b.

[0189] Inner sidewalls 94a, 94b project from inner surface 95 into slots 92a, 92b (i.e., toward lip 12) and optionally close the front of slots 92a, 92b. Each slot is sized and shaped to receive the flange shoulder 54 of the upper (inner) boss 42a and the lower (outer) boss 42b. That is, in the illustrated embodiment, the sides of slots 92a, 92b have grooves to receive tracks on the sides of bosses 42a, 42b. Each inner sidewall of inner sidewalls 94a, 94b is axially spaced from the corresponding boss 42a, 42b, but may alternatively abut the boss to provide resistance to thrust loads. Each corresponding slot 92a, 92b cooperates with the received boss 42a, 42b to provide support to the corresponding adapter leg to prevent displacement of the leg in the lateral and / or upward / downward directions.

[0190] Each of the legs 86a, 86b includes a pair of opposing side surfaces 96a, 96b extending longitudinally from near the nose 84 to the rear walls 90a, 90b. Legs 86a, 86b are connected via a central portion 140 extending rearward from the front end 80 and have a rearwardly supporting surface 142. Front portions 144 of the side surfaces 96a, 96b are connected to the legs 86a, 86b. The pair of opposing side surfaces 96a, 96b may be defined by one or more supports (not shown) welded to or otherwise fixed to a lip 12 adjacent to each side surface 96a, 96b. These external supports (not shown) may replace the internal supports 42a, 42b and / or 72, 74.

[0191] When the adapter 14 is mounted thereon, the support surface 142 abuts the leading edge surface 30 of the lip. In the illustrated embodiment, the support surface 142 is curved to complement the curved leading edge surface 30. It should be understood that various designs of the leading edge surface on the lip 12 and the complementary support surface 142 on the adapter 14 are possible. The above are given by way of example only. For example, the leading edge surface 30 may define a protrusion or recess to engage with a complementary recess or protrusion of the adapter 14 (respectively). As another example, the leading edge surface 30 and the support surface 142 may each be angled or have non-uniform curves.

[0192] The lower leg portion 86b is defined as extending from the rear portion of the nose portion 84 to the outer lower surface 98 of the rear end portion 82.

[0193] The upper leg portion 86a defines an outer upper surface 100 extending from the rear portion of the nose portion 84 to the rear end portion 82, and has a front portion 102 and a rear portion 104. In the illustrated embodiment, the rear portion 104 is recessed relative to the front portion 102, but this is not necessary. The rear portion 104 has an outer surface 105. The front portion 102 defines a rearward sidewall 106 adjacent to the rear portion 104 (in... Figure 19(Best view in the middle) to define the front of the recessed rear portion 104.

[0194] In the illustrated embodiment, the rearward sidewall 106 has a general C-shape when viewed from above, thereby defining a central portion 107a and side portions 107b that are generally parallel to the upper leg rear wall 90a, each side portion 107b extending from the central portion 107a toward its corresponding upper opposite side portion 96a and upper leg rear wall 90a. Other configurations of the rearward sidewall 106 are also possible.

[0195] The upper leg portion 86a (in this embodiment, the rear portion 104) defines a locking opening 112. In the illustrated embodiment, the locking opening 112 is elongated and includes a narrow front portion 110 and a narrow rear portion 114 (in... Figure 15 and 19 (The best view is shown), but other shapes are possible. In this embodiment, the lock opening 112 is located in the rear portion, but the lock opening may be located in both the front and rear portions or only in the front portion.

[0196] The rearward sidewall 106 includes a protrusion 117 of a retaining surface 118 defined on its lower side. In the illustrated embodiment, the protrusion 117 is one of the narrow front portions 110. The retaining surface 118 serves as a coupling structure to retain the wear cover 22 to the wear member 14.

[0197] In this embodiment, the retaining surface 118 covers the connecting portion 163 on the wear cover 22 (described in more detail below). In the illustrated embodiment, the connecting portion 163 is formed on a forward-extending tongue 163, but other embodiments are possible. For example, the protrusion 117 may be formed as a tongue with the retaining surface 118 for covering the upward surface of the rear wear cover 22. Multiple retaining surfaces 118 may be provided on the adapter to retain the wear cover to the adapter. The retaining surfaces 118 may be positioned at locations other than the front end of the wear cover.

[0198] The retaining surface 118 may optionally be biased (e.g., by an elastomer) to retract during installation of the wear cover and return to the retaining position when the wear cover is positioned in the installed position. Alternatively, the wear cover may include a coupling portion that retracts during installation and returns to a retaining position below the retaining surface on the adapter when the wear cover is in the installed position. Although in the illustrated embodiment, the retaining surface 118 cooperates with a lock to retain the wear cover 22 to the wear member 14 (described below), the retaining surface 118 may retain the wear cover without using a lock.

[0199] The stepped portion 125 of the adapter 14 defines a frame 120 recessed from the rear outer surface 105. The frame 120 defines a concave front surface 122, thereby forming a support surface; other shapes are possible. The frame 120 extends forward into the lock opening 108. A forward central sidewall 124 extends from the frame 120 to the rear outer surface 105. The space defined by the frame 120 and the sidewall 124 accommodates the connecting portion 163 of the wear cover 22.

[0200] The lower portion of the longitudinally extending lock opening 112 defines a pair of optional shoulders 126 (in Figure 13 and 15 (Best viewed from the center), each on its opposite longitudinal side, extends from the concave front surface 122 toward the narrow front portion 110. As described in more detail below, the shoulder 126 prevents the valve core 180 of the lock 24 from falling out through the lock opening 112.

[0201] The dimensions of the central portion of the lock opening 112 are set and aligned with the through hole 36 in the lip 12 and the lock opening 128 defined by the lower leg 86b to allow the lock 24 to be adapted to pass through it, as described in more detail below.

[0202] The lower leg locking opening 128 is partially defined by a side wall 129 (forming a support surface) located at its rear end. Figure 13 (Best viewed in the middle). The sidewall 129 extends from the inner surface 95 of the lower leg to the outer lower surface 98 of the lower leg, but other arrangements are possible. For example, the support surface 129 may extend only partially through the locking opening 128. In another embodiment, the locking opening may close at its lower end.

[0203] The rear portion 104 of the upper surface defines a stabilizing structure 130, including a forward support wall 132, near the rear end 82 to resist rearward movement of the wear cover 22. In the illustrated embodiment, the stabilizing structure includes a pair of recesses 130, each recessed relative to its respective upper opposing side surface 96a and the rear portion outer surface 105. Figure 13 and 14 As best viewed, each recess 130 includes: (i) a forward support wall 132; (ii) a curved upward surface 134 that rises from the forward support wall 132 toward the front portion 102 and merges with the rear portion outer surface 105; and (iii) a longitudinal wall 136 that extends between the curved upward surface 134 and the rear portion outer surface 105 and tapers toward the front portion 102. Each recess 130 is located behind the front portion 102 and in front of the upper leg rear wall 90a.

[0204] In other embodiments, the recess 130 may have different shapes or different locations, or the stabilizing structure may include protrusions instead of recesses. In other embodiments, the rear portion 104 may not be recessed relative to the front portion 102. In other embodiments, a forward support wall may be additionally provided. In one example, the forward sidewall 124 may resist rearward movement of the wear cover 22. In another example, the forward sidewall may be located at the rear end of the wear cover 22 (not shown).

[0205] In the illustrated embodiment, the groove 131 extends along each of the outer sides of the upper surface 100 of the adapter leg 86a between the rear wall 90a and the corresponding recess 130 to receive the sidewall 171 of the wear cover 22 to resist lateral loads on the wear cover. Alternatively, the groove 131 may be omitted, such that the sidewall 171 extends along the side surface 96a of the leg 86a. Additional support for the wear cover 22 to resist lateral loads may be provided.

[0206] In the illustrated embodiment, the wear cover 22 is captured and held in an upward movement (as described below) by holding the wear member 14 at the forward portion of the wear cover 22 by holding the retaining surface 118 of the wear member 14 at the rearward portion of the wear cover 22 and holding the retaining surface 194 of the lock 24 at the rearward portion of the wear cover. The wear cover 22 is preferably not in close contact with the wear member by the retaining surfaces 118, 194.

[0207] Wear cover 22 will now be referenced Figures 20 to 25 The wear cover 22 is formed of steel or other hard material, preferably harder than the material comprising the adapter 14. The wear cover 22 may optionally be configured as a composite component with an external abrasion-resistant surface.

[0208] The rear wear cover 22 is configured to mount on the rear portion 104 of the adapter 14 to provide wear protection, but it can be mounted in other locations to replace or supplement the rear portion 104, for example, on the front portion 102 and / or the lower leg 86b. In the illustrated embodiment, the upper wear surface 150 of the wear cover is aligned with or recessed from the outer surface of the front portion to minimize additional load and / or wear on the wear cover 22. However, the rear portion 104 does not need to be recessed. For example, the rear portion may have the same extension as the front portion 102 (or raised above the front portion), with the wear cover positioned above the adapter leg 86a.

[0209] The rear wear cover 22 preferably has a generally C-shaped construction, with a central wear plate to cover the top of the adapter leg 86a and an opposing sidewall 171 extending along the side of the leg 86a and fitting into a recess 131. The bottom end of the sidewall 171 is preferably spaced from the adapter 14, but may alternatively engage the adapter. The sidewall 171 may be omitted, and additional side supports, such as through the side of the wear cover, are provided. In the illustrated embodiment, the wear cover 22 includes an upper wear surface 150, a contoured lower engagement surface 152 facing the leg 86a, an opening 154 extending through the upper wear surface 150 and the lower engagement surface 152, a front connecting portion 156, an engagement wing 158, and a rear connecting portion 160 (in Figure 25 (Best seen in the middle). In other embodiments, the wear cover 22 may have a different construction.

[0210] In this embodiment, the front connecting portion 156 includes a front wall 161 having a protrusion or tongue 163 at its lower portion, and extends forward from the front wall 161 and beyond the upper wear surface 150. The connecting portion 156 is configured to engage a complementary connecting configuration (e.g., a protrusion 117) on the adapter 14. The protrusion 156 may be substantially centered on the rear wear cover 22 (when viewed from above or below, i.e., substantially centered in the lateral direction).

[0211] In other embodiments, the protrusion 156 may be separated into two or more front protrusions. In other embodiments, the front connecting portion may include a recess operable to engage with a complementary protrusion on the adapter. In other embodiments, the connecting portion may be part of a wear surface 150 extending thereon from a retaining surface 118.

[0212] Each of the engagement wings 158 extends downward from the sidewall 171 and is complementaryly received in a corresponding recess 130 on the adapter 14. Each engagement wing 158 includes a rearward support wall 162 for abutting a corresponding forward support wall 132 to resist rearward movement of the wear cover. Each engagement wing 158 also includes a downward surface 164 opposite a corresponding upward surface 134. In the illustrated embodiment, the downward surface 164 is spaced apart from the upward surface 134, but the surfaces can contact each other. As the engagement wings 158 extend toward the front wall 168, each engagement wing 158 tapers laterally (towards the corresponding side 136) and upward (towards the upper wear surface 150 of the rear wear cover 22). Other shapes are also possible. Alternatively, the engagement wing 158 may be a recess in the sidewall 171 that receives a complementary protrusion on the adapter.

[0213] In the illustrated embodiment, the upper wear surface 150 extends from the rear wall 166 across the entire width of the wear cover 22 to the front wall 168, the front wall having a general C-shape complementary to the C-shaped profile of the rearward sidewall 106. That is, the front wall 168 includes a narrow central portion 169a and a side portion 169b extending from either side 171 of the wear cover 22 to the narrow central portion 169a. The front wall 168 has a shape complementary to the rearward sidewall 106. However, the front and rear edges of the wear cover 22 may have other shapes.

[0214] In the illustrated embodiment, the rear connection portion 160 includes a boss extending downward from the upper wear surface 150 to be mounted on or opposite the frame 120. The boss 160 has a forward-extending tongue 172 held by a lock 24, and a generally centered rearward wall 170 opposite the forward central sidewall 124. Figure 8 and 40 (Best visible in the middle). The tongue 172 is configured to be positioned below the corresponding retaining surface 194 of the lock 24 (described in more detail below) such that the lock prevents the wear cover 22 from moving away from the wear member in the upward direction.

[0215] The rear wear cover 22 further includes a front wall 174 extending from the upper surface of the tongue 172 to the upper wear surface 150.

[0216] The rear boss feature 160 further includes a sidewall 176 extending from the opposite side of the rear wall 170 to the front tongue 172.

[0217] In the illustrated embodiment, lock 24 includes valve core 180 and wedge 240. Referring now to the figures... Figures 26 to 33 It describes in more detail a part of the multi-part lock 24, namely the valve core 180.

[0218] The valve core 180 includes an elongated body 182 defining a body axis 184, and has a head 186 and legs 188 extending generally along the body axis 184 from the head. When viewed from the front or rear, the body axis 184 is aligned with a vertical axis 185. Figure 1 The main axis 184 is offset from the vertical axis 185 by a small angle when viewed from either side, and the bottom of the legs 188 is located in front of the head 186. The small angle can be between 2 degrees and 10 degrees away from the vertical angle. Other offset angles are possible (larger or smaller), or the main axis can be vertical (i.e., there is no measurable offset).

[0219] The head 186 optionally protrudes laterally beyond the legs 188 (in Figure 28 (showing the front side of valve core 180) and Figure 29(The rear side of valve core 180 is shown, marked "LAT."), and forms a pair of shoulders 190, each having a similar size to (and preferably complementary in construction to) each of the shoulders 126 of adapter 14. In other embodiments, the surface of the shoulder 190 may not be complementary to the surface of the corresponding extended slot shoulder 126. Different configurations are also possible. The shoulder 190 may also be omitted.

[0220] The valve core 180 preferably includes two arms 192, 196 to capture a portion of the wear cover 22 and a portion of the wear member 14. However, a retaining surface 194, such as an upper arm 192, may be used to retain the wear cover. Both arms may be omitted, for example, if the retaining surface 194 is formed in a recess in the valve core to receive a portion of the wear cover, or if the wear cover is retained by other retaining surfaces on the adapter without locking cooperation.

[0221] In the illustrated embodiment, the wear cover is held to the wear member by at least one retaining surface 118 on the wear member and at least one retaining surface 194 on the lock. However, the wear cover can be held by at least one retaining surface on the adapter or at least one retaining surface on the lock alone.

[0222] In the illustrated embodiment, the head 186 defines an upper arm 192 at its upper portion. The upper arm 192 extends longitudinally (in... Figure 31 The upper arm 192 extends rearward (marked as "LONG"). Although the rear end 195 of the upper arm 192 appears to have a convex profile when viewed from above or below, it can have any shape. The upper arm 192 defines a retaining surface 194 on its lower portion to cover the tongue 172 and retain the wear cover 22 on the adapter 14.

[0223] In the illustrated embodiment, the leg 188 defines a lower arm 196 at its upper portion. However, the arm 196 may be disposed on the head 186. The lower arm 196 extends in the same longitudinal direction as the upper arm 192 and also has a protruding end surface 199 when viewed from above or below, but may have any shape. The lower arm 196 defines an engagement surface 198 on its upper portion. The retaining surface 194 and the engagement surface 198 are optionally parallel to each other and have similar dimensions. The lower arm engagement surface 198 is located at approximately the same height as the shoulder 190. Below in this embodiment, the lower arm 196 also defines an angled lower surface 200 opposite the lip 12. Regardless of the particular shape, the valve arms 192, 196 receive and capture the tongue 172 of the wear cover 22 and the stepped portion 125 of the adapter 14. In embodiments where the rear wear cover is not used, the stepped portion 125 of the adapter may fill the space between the upper arm 192 and the lower arm 196 of the valve 180. In this arrangement, the stepped portion can be enlarged and / or the gap between the valve arms can be reduced. Other arrangements without a rear wear cover are possible, such as including a spacer to replace the wear cover, a gap existing between the stepped portion and one or two valve arms, or the elimination of one or more valve arms.

[0224] The upper arm 192 and the lower arm 196 preferably extend generally perpendicular to the vertical axis 185, but other extensions are possible.

[0225] The head 186 defines a rear surface 201, which has a slightly convex profile (but other shapes, such as a flat surface, are possible) and extends between the upper arm 192 and the lower arm 196. When mounted on the adapter 14, the rear surface 201 engages with the stepped portion 125 of the adapter 14 to prevent the adapter 14 from moving forward from the lip 12. The rear surface 201 also opposes the front end of the tongue 172 of the rear wear cover 22 (in... Figure 8 and 40 (Best visible in the middle). The rear surface 201 of the valve core 180 is preferably spaced from the tongue 172, but can make contact.

[0226] For the length of the leg 188, the side surface 202 of the leg 188 extends generally parallel to the main axis 184 (and the vertical axis 185).

[0227] The rear surface of leg 188 is 204 (in Figure 29 The middle section 206 of the valve core 180 (best visible in the middle) extends generally parallel to the body axis 184 (which is offset from the vertical longitudinal direction) along the lower portion of the lower arm 196 to the lower section 208. In this embodiment, both the middle section 206 and the lower section 208 of the rear surface 204 define slightly convex surfaces, but other surface profiles are possible. The lower section 208 defines a support surface 210 to contact the lower leg 86b.

[0228] In the illustrated embodiment, the support surface 210 slopes rearward from the lower portion of the intermediate section 206 to the foot 212 of the valve core 180 and is generally parallel to the vertical axis 185.

[0229] In this embodiment, the head 186 and the leg 188 have a single (integral) construction, but in other embodiments, they may be separate parts joined together. Other shapes of the valve core 180 are possible.

[0230] The front surface 214 of the valve core 180 preferably extends generally parallel to the main axis 184 (which is longitudinally offset from the vertical axis 185) from the top 216 of the valve core 180 to a sloped portion 218 near the bottom of the leg 188. The sloped portion 218 slopes backward and extends to the foot 212 at the bottom of the leg 188.

[0231] The engagement of the beveled portion 218 and the foot 212 is on or near the main axis 184 (although this may not be the case in other embodiments).

[0232] In the illustrated embodiment, the front surface 214 defines an arcuate recess 220 that extends from the top 216 toward the ramp portion 218 and then partially beyond the beginning of the ramp portion. A positive thread 222 formed by spaced helical ridges is provided on the arcuate recess 220, extending from the lower portion of the head 186 above the ramp portion 218, but other thread configurations are possible. An optional thread stop 224 is provided at the lowest portion of the positive thread 222 to prevent the wedge (described in more detail below) from being screwed beyond the stop 224. The front surface 214 may have other configurations to complement other types of wedges or other drives.

[0233] In this embodiment, the middle section 206 and lower section 208 of the leg 188 do not contain any lateral or longitudinal protrusions. This has the advantage that the leg 188 can be easily inserted into the longitudinally extending opening 154 in the rear wear cover 22, the locking opening 112 of the upper leg 86a of the adapter, the through hole 36 of the lip 12, and the locking opening 128 of the lower leg 86b of the adapter, as will be described in more detail below. Also as described below, the wear cover 22 can be installed after the valve core 180 is inserted.

[0234] However, in other embodiments, it may be desirable to add a lower arm (not shown) at or near the lower portion of the intermediate section 206 or the upper portion of the lower section 208. This lower arm may help resist forces on the adapter 14 by engaging (connecting) with the outer surface 34 of the lip 12 or with a feature defined by the adapter lower leg 86b.

[0235] Still referencing Figures 34 to 38The accompanying drawings illustrate, in particular, another part of 24 in this embodiment, namely the wedge 240.

[0236] The wedge 240 includes a cylindrical portion 246 with an outer surface taper angle 248, which in this embodiment is approximately 3 degrees relative to the vertical axis 185 (although smaller or larger taper angles are possible). The taper angle 248... Figure 34 The vertical dashed line 252 is used to display this.

[0237] The cylindrical portion 246 defines the recessed external negative thread (in the form of a helical groove with a relatively wide pitch) 254, but other thread constructions can be used.

[0238] A relatively wide spiral section 256 is formed between the adjacent spiral groove sections of the negative thread 254.

[0239] In one embodiment, the thread 254 on the wedge 240 has a pitch of approximately one inch (25 mm) and a thread width of approximately 1 / 8 inch (3 mm), but the pitch and width can be selected from a range of suitable values. The thread 254 is preferably formed by a bent corner to create a robust thread that is not prone to hardening or other damage. The upper (or rear) end 258 of the wedge 240 defines a recessed steering configuration 260 to facilitate engagement with a tool for turning the wedge 240, such as a wrench. In a preferred embodiment, the configuration 260 is a square socket, but other arrangements can be used.

[0240] The cone angle 248 can be selected to provide the desired occupancy of the adapter 14 on a support structure, such as the lip 12. For example, if the cone angle 248 is increased, the rate at which the adapter 14 moves to the set position on the support structure increases, but at the cost of tightening force (i.e., more torque is required to rotate the wedge 240); conversely, if the cone angle 248 is decreased, the rate at which the adapter 14 moves to the set position on the support structure decreases, but the tightening force decreases. The cone angle 248 can be designed to match a specific task. In most cases, the holding force of the lock 24 is expected to be approximately the same, provided that the wedge 240 is not formed with a diameter too small at the front (or lower) end 262 to provide sufficient strength.

[0241] like Figure 37As best viewed, it shows the wedge 240 received in a recess on the keyway insert 44 and in a recess 220 in the valve core 180, as well as screwed into the thread 222 on the valve core. A section 256 (between adjacent portions of the thread 248) provides a large surface area to press against both the rear surface 76 of the keyway insert 44 and the front surface 214 of the valve core 180. The relatively large section 256 allows the lock 24 (including the valve core 180 and the wedge 240) to withstand large loads with acceptable stress levels without requiring threads to be formed in the wall of the keyway 36 of the lip 12. The relatively wide pitch of the thread 254 also allows the wedge 240 to move quickly in and out of the valve core 180.

[0242] The installation of wear assembly 10 will now be specifically referred to Figures 38 to 40 The accompanying drawings are described in enlarged views, showing a small portion of the wear assembly 10 before, during, and after the installation of the wear cover 22. Figure 41 The enlarged sample image shows the lock 24 after it is fully installed. Figure 8 Part of the wear assembly 10.

[0243] To install adapter 14, it is slid back onto lip 12, with upper leg 86a above inner surface 32 and lower leg 86b below outer surface 34, such that upper leg slot 92a slidably engages with upper boss 42a, such that slot 92a surrounds flange shoulder 54 of upper boss 42a. Similarly, lower leg slot 92b slidably engages with lower boss 42b, such that slot 92b surrounds flange shoulder 54 of lower boss 42b.

[0244] When installed in this manner, the adapter 14 is positioned correctly on the lip 12, wherein the upper leg locking opening 112 is aligned with the lip through-hole (or keyway) 36 and the lower leg locking opening 128.

[0245] Once the adapter 14 is correctly positioned, the valve core 180 (with the foot 212 and the beveled portion 218 as the leading edge surfaces) is inserted into the locking opening 112, the lip through-hole (or keyway) 36, and the lower leg locking opening 128. At this time, the shoulder 190 of the valve core 180 rests on the extended shoulder 126 of the adapter 14, thereby preventing the valve core 180 from falling out through the upper leg locking opening 112.

[0246] By moving the valve core 180 forward (to) Figure 39 (in the direction of the middle arrow C), the wear cover 22 can be moved downwards (to...) Figure 38(In the direction of arrow B) and rotate the front part of the connecting structure 156 downward and mount it on the adapter 14 below the retaining surface 118. Then, the rear wall 166 of the wear cover 22 can be lowered toward the adapter 14, such that the contoured lower engaging surface 152 of the wear cover 22 is positioned above the rear portion 104 of the upper surface 100. Specifically, the forward tongue 172 is positioned on or above the bracket 120 of the adapter 14, the wear plate of the wear cover is positioned on the outer surface 105 of the rear portion 104, and the rearward wall 162 of the engaging wing 158 is opposite to the forward support wall 132 of the recess 130 of the adapter 14.

[0247] The downward surface 164 of the engagement wing 158 is positioned adjacent to the upward shoulder 134 of the adapter 14, but they can remain spaced apart. The rearward wall 170 of the wear cover 22 is also close to the forward center sidewall 124, but they can remain spaced apart.

[0248] Then the valve core 180 can move backward (along...) Figure 40 (in the direction of arrow D in the diagram) so as to perform the following operations: (i) the upper arm 192 and the lower arm 196 capture the tongue 172 of the wear cover 22 and the stepped portion 125 of the adapter 14 between them, such that the retaining surface 194 of the upper arm 192 slides over and remains above the forward tongue 172 (with rear boss feature 160) of the rear wear cover 22; (ii) the rear surface 201 of the head of the valve core 180 abuts the forward surface 122 of the stepped portion 125 of the adapter 14; (iii) the engagement surface 198 of the lower arm 196 slides under the stepped portion 125 of the adapter 14 and remains below; and (iv) the support surface 210 of the valve core leg 188 abuts or is adjacent to the forward portion of the lower leg 86b that defines the locking opening 128.

[0249] Preferably, the wear cover 22 is installed before the valve core 180 is inserted. In this case, the valve core 180 is inserted through the longitudinally extending opening 154, the locking opening 112, the lip through-hole (or keyway) 36, and the lower leg locking opening 128 in the wear cover 22. The remaining arrangement of the portion is the same whether the valve core 180 is inserted before or after the wear cover 22 is installed.

[0250] Wedge 240 is inserted through opening 154 in wear cover 22. A wrench (or other convenient tool) is used to engage steering mechanism 260 and rotate wedge 240 such that thread 254 on wedge engages complementary thread 222 on valve spool 180. As the tip 262 of wedge 240 moves toward threaded stop 224, wedge 240 pushes valve spool 180 backward. Continue tightening wedge 240 until wedge 240 is tightened to a set level of torque, and the rear surface 201 of valve spool 180 is pressed against the front wall 122 of stepped portion 125 of adapter 14, and the rear surface 210 of valve spool 180 is pressed against the front wall of locking opening in lower leg 86b. However, during assembly, it is possible that one of the rear surfaces 201 or 210 may remain spaced apart from its complementary support surface on the adapter and make contact when load is applied to the adapter and / or wear occurs.

[0251] like Figure 41 As best viewed, the insertion of the wedge 240 ensures that the wear cover 22 remains on the adapter 14, and simultaneously ensures that the adapter 14 remains on the digging edge 12. Specifically, the tongue 163 is positioned below the retaining surface 118 on the adapter 14, and the tongue 172 is positioned below the retaining surface 194 on the lock 24 (i.e., the arm 192 of the valve core 180) to prevent the retainer from moving upwards away from the adapter (along the vertical axis). Since the wear cover is preferably not tightly held in place, it can wiggle slightly between the wear member and the lock surface containing the wear cover.

[0252] In the illustrated embodiment, the lateral force on the wear cover is primarily resisted by the inner surface of the arm 171 of the vertical wall of the groove 131 in the adapter.

[0253] To remove adapter 14, rotate wedge 240 counterclockwise to drive wedge 240 upward so that worn assembly 10 can be removed. Then valve core 180 moves forward (in... Figure 39 (in the direction of arrow C), causing the upper arm 192 and lower arm 196 to disengage from the tongue 172 of the rear wear cover 22 and the upper leg 86a of the adapter 14. The rear wear cover 22 can then be pivoted upwards and removed from the wear assembly 10, as per reference. Figures 38 to 40 The reverse process described above.

[0254] Then the valve core 180 can be removed from the wear assembly 10, and the adapter 14 can be pulled from the lip 12.

[0255] If used, the front wear cover 20 can be installed and removed in the usual way.

[0256] Alternative embodiments of lock 324 will now be referred to. Figures 42 to 48 Describe it.

[0257] Figure 42 This is a front view of a stepped valve core 280, which is an alternative to valve core 180. The main difference between valve core 180 and stepped valve core 280 is that stepped valve core 280 has an arcuate recess 320 on its front side, which, as it extends toward the lower section 208 of leg 188, includes (i) a first portion 320a, extending a portion of its length generally parallel to the body axis 184; (i) a second portion 320b, inclined toward the body axis 184, extending a portion of its length; and (i) a third portion 320c, extending a portion of its length generally parallel to the body axis 184. In contrast, the arcuate recess 220 on valve core 180 is generally parallel to the body axis 184 along its length.

[0258] In embodiments where a stepped valve core 280 is used, it is preferable to have a stepped keyway insert 344, such as Figure 44 As shown in the image.

[0259] The main difference between the keyway insert 44 and the stepped keyway insert 344 is that the stepped keyway insert 344 has a rear surface 376, which includes (i) a first portion 376a extending a portion of its length generally parallel to the body axis 184; (i) a second portion 376b inclined toward the body axis 184 for a portion of its length; and (i) a third portion 376c extending a portion of its length generally parallel to the body axis 184. In contrast, the rear surface 76 of the keyway insert is generally parallel to the body axis 184 along its length.

[0260] The stepped valve core 280 and the stepped keyway insert 344 are preferably used together with the stepped wedge 340, such as Figure 45 As shown in the image.

[0261] The main difference between wedge 240 and stepped wedge 340 is that stepped wedge 340 includes an upper truncated conical portion 342, a lower truncated conical portion 344, and a central cylindrical (or other shaped) portion 346 between the upper truncated conical portion 342 and the lower truncated conical portion 344. The diameter of the central cylindrical portion 346 matches the diameter of the lowest portion of the upper truncated conical portion 342 and the highest portion of the lower truncated conical portion 344. The truncated conical portions 342 and 344 have the same outer surface taper angle 348, which in this embodiment is approximately 5 degrees relative to the vertical axis 185 (although smaller or larger taper angles are possible). Taper angle 348 in... Figure 45 The vertical dashed line 352 is used to display this.

[0262] Similar to wedge 240, the external negative thread (in this example, in the form of a helical groove with a relatively wide pitch) 254 extends substantially the entire length of the stepped wedge 340, but other types of threads may be used. The thread begins at the upper truncated conical portion 342, crosses the cylindrical portion 346 (also referred to as the stepped portion), and then continues along the lower truncated conical portion 344. However, in other embodiments, the cylindrical portion 346 may be unthreaded. In another embodiment, only one of the truncated conical portions of the wedge may be threaded. In another embodiment, the central portion does not contact the valve core 280 and / or the front support 344. Having the cylindrical portion 346 allows for a wider taper (larger taper angle 348) on the truncated conical portions 342, 344 without reducing the diameter of the wedge 340, which may increase the risk of breakage of the wedge 340 during use.

[0263] When assembling lock 324, such as Figure 48 As shown, the upper conical portion 342 of the wedge 340 is aligned with the first portion 320a (on the rear side) of the valve core 280 and the first portion 376a (on the front side) of the stepped keyway insert 344. Similarly, the lower conical portion 344 of the wedge 340 is aligned with the third portion 320c (on the rear side) of the valve core 280 and the third portion 376c (on the front side) of the stepped keyway insert 344. The central cylindrical portion 346 of the wedge 340 is aligned with the second portion 320b (on the rear side) of the valve core 280 and the second portion 376b (on the front side) of the stepped keyway insert 344.

[0264] Providing complementary stepped components for the wedge allows for greater occupation and / or more secure attachment of the adapter 14 to the lip 12.

[0265] Locks 24 and 324 offer numerous advantages. For instance, locks 24 and 324 directly retain both components (wear member 14 and rear wear cover 22), whereas prior art locks directly retain either the wear member or the wear cover. Locks 24 and 324 provide retention in two orthogonal directions: they retain the wear member 14 back into the excavation edge 12, and they retain the wear cover 22 as it moves upward from the wear member 14.

[0266] Locks 24 and 324 only need to keep the rear portion of the wear cover 22 vertically downward, with all other loads directed towards the stable surface. Locks 24 and 324 are isolated from the load applied to the rear wear cover 22. Failure of the rear wear cover 22 will not impair the primary function of locks 24 and 324 in securing the adapter 14 to the lip 12.

[0267] The installation method of the disclosed embodiment involves pivoting (or rotating) the wear cover 22 into place (compared to prior art wear covers that require linear installation, i.e., the wear cover track is moved through a groove on the adapter). The rear wear cover 22 is removed in a direction orthogonal (vertically upward) to the material flow, meaning that the rear wear cover 22 is rotated / pivoted and then immediately pulled away from the adapter 14 (and any particles therein or on it) rather than being pulled along the track.

[0268] Locks 24 and 324 hold the rear wear cover 22 in a direction orthogonal to the material flow. The multi-part locks 24 and 324 have a stabilizing feature that prevents any part of the locks 24 and 324 from excessively migrating if the rear wear cover 22 is lost.

[0269] Other advantages of this embodiment relate to valve cores 180 and 280. Valve cores 180 and 280 require only an arm at the upper end of the valve core. Any engagement of the adapter lower leg 86b is restricted to the rearward longitudinal force (into the bucket) and forward movement of the adapter lower leg 86b. Valve cores 180 and 280 have features (e.g., a shoulder 190) that prevent them from falling off via the adapter 14 during installation and removal. Valve core 180 is held in place by allowing it to slide longitudinally forward, thereby releasing the rear wear cover 22.

[0270] Locks 24 and 324 are installed and removed only on the upper side of lip 12 and will not fall to the lower side of the bucket. This improves the safety of personnel during installation and specifically when removing adapter 14. The convenient sliding of valve cores 180 and 280 after removing wedges 240 and 340 allows for alteration of the rear wear cover 22 without removing valve cores 180 and 280. Vertical retention features are provided only on the upper leg 86a of the adapter. There is no need to pry the bottom of valve cores 180 and 280 backwards to release engagement with adapter 14. The system has fewer components and the installation and removal process is simpler compared to having a dedicated lock for the rear wear cover 22. Locks 24 and 324 can be used in multiple GET configurations (e.g., with or without the rear wear cover 22).

[0271] Other locking arrangements besides those described above may be used. For example, a design with a wedge and valve arrangement similar to that shown in U.S. Patent No. 6,986,216 may be used, or an alternative design may be used. A wedge driven by a hammer, bolt, or other arrangement may be used instead of a threaded wedge and valve. Other locks without a wedge or valve may be used. A lock may include one or more components.

[0272] The design of the above embodiments offers various manufacturing benefits, including, for example, reduced suitability requirements for adapter lock combinations. The mounting area is more located within the upper leg 86a of the adapter 14 (rather than both upper leg 86a and lower leg 86b). The valve core mating does not cross the adapter legs 86a and 86b. The simplified design of the lower leg 86b provides more manufacturing options.

[0273] The wedge 340 is designed with a sharply increased occupy / cone angle, which is achieved through steps between the conical sections. This step allows for a large cone angle while maintaining an acceptable diameter at the top and bottom of the wedge 340. The total height range and strength of the lock 324 can be maximized by only tapering the surfaces that contact the other components (keyway insert 344 and valve core 280). The occupy can be twice that of prior art wedges.

[0274] Another embodiment of the invention will now be referred to. Figures 49 to 63 The description illustrates a wear assembly 410 (not shown) mounted on a conventional lip 412 of a bucket. In this embodiment, the lip 412 has a type of hole through which the wear member engages with the lip 412, which is not specified. The lip 412 includes a series of spaced-apart bases 417 ( Figure 49 (Only one is shown in the image); typically each base 417 is disposed between adjacent noses for supporting teeth. Each base 417 is configured to receive a wear member 412 thereon. In this embodiment, the wear member 412 is a shield.

[0275] The wear assembly 410 includes a shroud 414, a wear cover 422, and a lock 424 for securing the shroud 414 to the excavation edge 412 and for simultaneously securing the wear cover 422 to the shroud 414.

[0276] The guard 414 protects the bucket lip 412 and guides the geotextile material into the bucket. The wear cover 422 protects the upper leg of the guard 414 and, in the illustrated embodiment, surrounds the keyhole and lock.

[0277] In this embodiment, the base 417 is a cast portion of the lip 412, but in other embodiments it can be attached by welding or mechanical attachment. In any case, each shield 414 is placed on the base 417 at the leading edge of the lip 412.

[0278] The base 417 may include a harder, more wear-resistant material than the rest of the lip 412, for example, if the base is welded to the lip (or may have a hard, wear-resistant coating thereon) to resist wear caused by the shield 414 during operation. However, the rest of the lip 412 is not necessarily softer than the base 417.

[0279] Each base 417 includes a front surface 419, a top surface 421, a side surface 423, and an upright boss 425 generally centered between the side surface 423 and projecting above the top surface 421. The boss 425 has a rear surface 427, which a lock 424 abuts when the cover 414 is secured in place. The bases 417 and the cover 414 have complementary surfaces to allow for a stable and secure connection between them.

[0280] In the illustrated embodiment, the front surface 419 defines a slightly convex, curved shape that bends about two generally perpendicular axes, but other configurations are possible. Specifically, the front surface 419 is generally curved about a vertical axis, causing it to curve rearward as it approaches each corresponding side surface 423, and generally curved about a horizontal axis, causing it to also curve rearward as it approaches the upper surface 421, with the lower surface (not visible in the figures) opposite the upper surface 421. However, other designs and configurations of the boss are possible.

[0281] The shield 414 includes a forward wear-resistant portion 429 and a rearward mounting portion 431. The shield 414 includes a pair of spaced-apart legs 433, 435, which define a cavity 437 therebetween and meet at the central portion 439. Figure 49 and 50 (Best visible in the middle). Cavity 437 is normally opened along its side so that when the shield 414 is mounted thereon, the legs 433, 435 cross the side surface 423 of the base 417 on the lip 412.

[0282] The cover 414 defines a recess 441 on the upper leg 433, which in this embodiment is located at the upper center to receive the wear cover 422. In the illustrated embodiment, the recess 441 is closer to the rear edge 443 of the upper leg 433 than the front edge 445, but other arrangements are possible. The rear edge 443 extends substantially across the entire width of the upper leg 433. The front, rear, and / or side walls of the recess 441 preferably resist forward, rearward, and / or lateral movement of the wear cover relative to the wear member, but the wear cover 422 can be loosely held in the recess.

[0283] The upper leg 433 is confined within the wear cover hole 441, but the wear cover frame 447 is recessed relative to the wear cover hole. Figure 49 (Best visible in the middle). When mounted on the frame 447, the frame 447 is positioned at a depth to provide a wear cover 422, flush with the outer surface of the upper leg 433. However, the wear cover may protrude from this or be recessed relative to the outer surface of the upper leg 433.

[0284] The frame 447 defines a lock opening 449 including a boss hole portion 449a and a lock hole portion 449b. The boss hole portion 449a is sized to sit above and surround the boss 425 of the base 417. To conform to the shape of the boss 425 (which tapers toward the front surface 419 of the lip 412), the boss hole portion 449a has a sidewall 451 that tapers toward the front of the cover 414. The lock hole portion 449b extends laterally beyond the boss hole portion 449a and has a generally parallel sidewall 453. The lock hole portion 449b is sized to accommodate a lock 424 (described in more detail below).

[0285] The ridged protruding surface 455 is generally centered on the outer surface of the upper leg portion 433 and extends from the wear cover hole 441 to the front edge 445 of the shield, with the ridge portion 457 extending longitudinally. This ridged protruding surface 455 provides additional protection against wear during the use of the shield 414.

[0286] The wear cover 447 has a generally flat upper surface 458 and a protruding lower surface 459 on the underside of the parallel sidewall 453. Figure 63 (Best viewed in the middle). Other shapes can be used.

[0287] Wear cover 422 will now be specifically referenced. Figures 54 to 56 To provide a more detailed description.

[0288] The wear cover 422 includes a generally flat bottom side 461 (in Figure 56 The wear cover has a contoured upper surface 463 (best visible in the center), an inclined surface 465 defined on its opposite lateral sides, and inclined surfaces 467 between the inclined surfaces 465, each of which rises from its respective inclined surface 465 to a longitudinally extending central ridge 469. However, the wear cover can have different shapes.

[0289] In the illustrated embodiment, the contoured upper surface 463 has a shape similar to the ridge-shaped protruding surface 455, such that when the upper wear cover 422 is installed in the wear cover hole 441, the contoured upper surface 463 becomes a continuation of the ridge-shaped protruding surface 455.

[0290] The wear cover 422 also defines a keyhole 471 extending from the upper surface 463 to the lower side 461. The keyhole 471 is generally slot-shaped and is generally centrally located on the upper wear cover 422, extending laterally across the contoured upper surface 463. Other shapes are also possible.

[0291] A pair of longitudinally extending protrusions 473 (in) Figure 55The longitudinally extending protrusion 473 (best visible in the center) is located below the opposite lateral side of the keyhole 471 and extends into the area defined by the keyhole 471. In this embodiment, the longitudinally extending protrusion 473 has a convex upper surface 474 (in the center of the keyhole 471). Figure 63 (best visible in the center), but other shapes are possible. These longitudinally extending protrusions 473 define the connecting portion engaged by the lock 424, as will be described in more detail below.

[0292] Lock 424 will now be referenced Figures 57 to 63 For a more detailed description, the accompanying drawings show various views of it. Lock 424 is essentially the same as referenced. Figures 6 to 15 The lock described in U.S. Patent No. 10,612,214 (owned by the applicant) is identical and will therefore be described only briefly herein. However, different lock designs may be used in other embodiments. For example... Figures 57 to 63 As can be seen, lock 424 contains separable pieces or parts, but is usually in the form of an integral unit during use.

[0293] In the illustrated embodiment, lock 424 comprises two bodies or components 481, 483, which are pivotally coupled together to lock under a locking condition (see [link]). Figure 59 and Figure 62 ) and unlocking conditions (see Figure 63 Move between ) around the horizontal axis 485 (in Figure 60 (Best visible in the middle). The main body can be adjusted movablely in other ways, such as linearly shifting relative to each other rather than pivoting.

[0294] The relative pivoting or hinged connection of the two components 481, 483 can be achieved using a hinge mechanism 487. In the illustrated example, the hinge mechanism 487 includes an integral post 489 projecting from the inner surface 491 of the first component 481. The inner surface 493 of the second component 483 includes a complementary hole (not shown) of a predetermined size and is positioned to receive the post 489, thereby pivotally connecting the first component 481 and the second component 483 together in the assembly for limited movement about a transverse axis 485. However, in other embodiments, different hinge mechanisms may be used.

[0295] In this embodiment, the transverse axis 485 is generally parallel to the longitudinal axis of the wear member 414 (see [reference]). Figure 49 And perpendicular to the inner (or contact) surfaces 491, 493. The pivot connection may have other configurations. For example, the hinge mechanism 487 may have other configurations, including, for example, each component forming a hole for receiving a pivot pin fixed in place by a retaining ring, etc.

[0296] Each component 481, 483 defines half of a truncated conical channel 495, 497, such that when components 481, 483 are aligned, the components are assembled to form a truncated conical channel 499 for receiving a threaded pin 501. Other types of retainers may be used to secure the lock bodies 481, 483 in their extended positions.

[0297] One or optionally two truncated conical channels may define threads (positive or negative) for engagement with the complementary threads (negative or positive) of the threaded pin 501. In other embodiments, the truncated conical channels or pins may be unthreaded. Other shapes of channels and pins are possible. Channels may also be partially threaded or threaded in a discontinuous manner.

[0298] A hexagonal socket 503 or other tool engagement mechanism is provided at the top of the threaded pin 501 for rotating the threaded pin 501. When the threaded pin 501 is screwed into the truncated conical channel 499, components 481 and 483 are locked in place (e.g., ...). Figure 59 (as shown in the image).

[0299] When the threaded pin 501 is removed, components 481 and 483 are unlocked and can pivot about axis 485 from the locked configuration to the unlocked configuration, wherein the length of the lock 424 is shorter than in the locked position.

[0300] In other embodiments, pin 501 may take many different forms and may be housed in other openings provided in one or both components.

[0301] Lock 424 has a first end wall 511 and a second end wall 513 on its opposite sides.

[0302] Each end wall 511, 513 has a pair of blades or arms 515, 517 spaced apart from each other, and has a generally convex outer surface. A concave end wall surface 519 is defined between the upper 515 and lower 517 blades on each end wall 511, 513. One arm 515 on each end 511, 513 includes a retaining surface 594 that covers a corresponding protrusion 473 on the wear cover 422 to resist upward movement of the wear cover away from the wear member 414.

[0303] The upper blade or arm 515 defines a downward retaining surface 594 (similar in some respects to the retaining surface 194 of the upper arm 192 of valve cores 180 and 280). Similarly, the lower blade or arm 517 defines an upward engaging surface 598 (similar in some respects to the engaging surface 198 of the lower arm 196 of valve cores 180 and 280). The downward retaining surface 594 complements the convex upper surface 474 of the longitudinal extension 473 of the upper wear cover 422 (and is designed to be located directly above said convex upper surface). Similarly, the upward engaging surface 598 complements the convex lower surface 459 of the wear cover 447 of the wear member 414 (and is designed to be located directly below said convex lower surface).

[0304] In other embodiments, the upper surfaces of the downward retaining surface 594 and the longitudinally extending protrusion 473 may have different profiles than those described above.

[0305] Lock 424 includes features that facilitate its removal using a removal tool 601 of the type described in U.S. Patent No. 10,612,214.

[0306] To install the wear assembly 410, if the cover was shipped and / or stored in place with the lock, the lock is removed first. If the wear assembly has a lock release position (e.g., as disclosed in U.S. Patent No. 10,612,214), the lock 424 is left in place or moved to an elevated position. Alternatively, the lock may be supplied separately and installed as needed.

[0307] The cover 414 is aligned with the base 417 and positioned thereon such that the sidewall of the boss hole portion 451 surrounds the lateral side of the boss 425, and the connecting hole 449 is aligned with the area immediately behind the boss 425. The wear cover 422 is then placed in the wear cover hole 441 until the lower side 461 of the wear cover 422 is positioned on the wear cover holder 447. Optionally, the cover can be mounted on the lip, where the wear cover is already in place.

[0308] When lock 424 is pivoted in the unlocked position, it is inserted into the rear of boss 425 through the locking hole 471 of upper wear cover 422 (for ease of understanding, in Figure 63 (shown by dashed lines) to Figure 63 The position shown. Then, pivot lock 424 to the locked position (in the position shown). Figure 61 and 62(As shown in the diagram). During this pivoting movement, the concave end wall surface 519 at each end 511, 513 of the lock 424 engages with and rotates about the convex lower surface 459 of the lock hole sidewall 453 and the convex upper surface 474 of the longitudinal extension bracket 473. The flat bottom side 461 of the wear cover 422 contacts each other with the flat upper surface 458 of the bracket 447 on the cover 414, or alternatively, provides a tight fit if a mating pad is used. Thus, the lock 424 provides a strong and robust mechanical mechanism for resisting heavy loads and preventing the wear cover 422 from being released from the wear member 414 or the wear member 414 from the excavation edge 412.

[0309] The upper and lower blades or arms 515, 517 prevent the upper wear cover 422 from moving in the vertical axis (e.g., vertically upward), but the wear cover 422 can be loosely held. The lower leg 435 prevents the guard 414 from moving in the vertical axis (e.g., vertically upward), but grooves and tracks (not shown) may also be provided in the boss and guard. In a manner similar to conventional lips and locks, the boss 425 and lock 424 prevent the guard 414 from moving forward.

[0310] The removal of the wear assembly 410 from the lip 412 is performed in the reverse order described above, optionally using the removal tool 601 to unlock the lock 424.

[0311] It should now be understood that the above embodiments have the advantage that a single lock 424 simultaneously secures the wear cover 422 to the cover 414 and the cover 414 to the lip 412.

[0312] Other lock arrangements besides those described above can be used.

[0313] The systems, apparatuses, and methods disclosed herein are examples of the application of the principles of this disclosure in practice, and various other examples are also possible. Therefore, the scope of this disclosure is not limited to the details of the wear assemblies 10, 410 and methods described herein and / or depicted in the accompanying drawings. Various other examples and numerous modifications can be made without departing from the scope and broader aspects of this disclosure as defined in the claims. For example, an adapter similar to adapter 14 can be used without the wear cover 22; or used with a pair of rear wear covers 22 mounted on each of the legs 86a, 86b or at multiple locations on one or both legs 86a, 86b. In other embodiments, a valve core with a rear arm (similar to the design shown in U.S. Patent No. 6,986,216 or as used in a conventional Whistler type design) can be used. In other embodiments, the lock may comprise multiple components held together as a single unit, but which may be movable relative to others. Aspects of this disclosure have been described with respect to their illustrative examples. Many other examples, modifications, and variations will come to mind by those skilled in the art upon review of this disclosure, within the scope of the appended claims. A feature in one example can be used in conjunction with a feature in another example. The combination of the given examples and the disclosed features is not intended to be limiting in the sense that they must be used together. Relative directional terms such as inside, inward, outside, upward, etc., are provided for ease of understanding and are not intended to limit any direction the marked portion may face during use.

Claims

1. An abrasion member for attachment to the excavation edge of a geotechnical apparatus, the abrasion member comprising: front end; as well as The forked legs extending rearward from the front end, each of the legs including an inner surface and a rear wall facing the excavation edge, and at least one of the legs having a lock opening therein for receiving a lock; The at least one of the legs includes a front portion and a rear portion recessed relative to the front portion. The front portion includes a rearward sidewall adjacent to the rear portion to counteract a wear cover that can be received in the recessed rear portion. The rear portion includes at least one forward support wall located in front of the rear wall, the at least one forward support wall being adapted to engage the wear cover in the rear portion and resist rearward movement of the wear cover.

2. The wear member of claim 1, wherein the rear portion at least partially surrounds the locking opening.

3. The wear member of claim 1, wherein the rear portion comprises two forward support walls defined in recesses located on opposite sides of the locking opening.

4. The wear member of claim 2, wherein the rear portion comprises two forward support walls defined in recesses located on opposite sides of the locking opening.

5. An abrasion member for attachment to the excavation edge of a geotechnical apparatus, the abrasion member comprising: front end; The forked legs extending rearward from the front end, each leg comprising an inner surface and a rear wall facing the excavation edge, and at least one leg defining a lock opening therein for receiving a lock; and A pair of recesses on each side of the lock opening, wherein each recess contains a forward wall for resisting rearward movement of the wear cover on the at least one leg.

6. The wear member of claim 5, wherein each of the recesses comprises a lateral longitudinal wall and an outward shoulder, the lateral longitudinal wall and the outward shoulder each extending forward from a corresponding forward support wall.

7. The wear member of claim 6, wherein each shoulder of the shoulder is inclined to extend from the lower end of one of the front walls to the outer side of the rear portion.

8. The wear member of claim 7, wherein each shoulder of the shoulder tapers such that the width of each shoulder decreases toward the front end.

9. The wear member of claim 5, wherein at least one of the legs comprises a front portion and a rear portion recessed relative to the front portion, and the locking opening and the recess are contained in the rear portion.

10. The wear member according to claim 5, wherein the rear portion includes an axial groove on each side adjacent to the at least one leg, wherein each groove extends axially between the locking opening and the rear wall to receive a portion of the wear cover to resist lateral forces on the wear cover.

11. A wear assembly for attachment to the excavation edge of a geotechnical apparatus, the wear assembly comprising a wear member according to any one of the preceding claims, a wear cover mounted on the wear member, and a lock located in the lock opening to secure the wear cover to the wear member and the wear member to the excavation edge.

12. A wear assembly for geotechnical equipment, the wear assembly comprising: A wear member, operable to engage with the excavation edge of the geotechnical equipment; A wear cover, the wear cover being configured to be mounted on the wear member; as well as A lock secures the wear member to the excavation edge and the wear cover to the wear member.

13. The wear assembly of claim 12, wherein the wear member comprises a front end and a forked leg extending rearward from the front end, each of the legs comprising an inner surface facing the excavation edge, an outer surface opposite the inner surface, and a rear wall, at least one of the legs having a lock opening therein for receiving a lock.

14. The wear assembly of claim 13, wherein the at least one leg includes a front portion having a rearward sidewall and a rear portion extending from the rearward sidewall to the rear wall, wherein the rear portion has an upper surface extending from the rearward sidewall to the rear wall and recessed relative to the front portion, the recessed upper surface being configured to receive the wear cover.

15. The wear assembly of claim 13, wherein the wear cover comprises an upper wear surface covering the outer surface of at least one of the legs, and a pair of sidewalls covering opposite sides of the at least one leg to resist lateral loads on the wear cover.

16. The wear assembly of claim 12, wherein the wear member includes at least one forward support wall, and the wear cover includes at least one rearward support surface to engage the at least one forward support wall to resist rearward movement of the wear cover.

17. The wear assembly of claim 16, wherein the wear member includes a recess on each side of the locking opening, each recess including a forward support wall, the wear cover including a protrusion to engage with each recess, and each protrusion including a rearward support surface.

18. The wear assembly of claim 12, wherein the lock comprises two arms that capture a portion of the wear cover and a portion of the wear member therebetween.

19. The wear assembly of claim 12, wherein the wear cover includes an opening that mates with the locking opening.

20. The wear assembly of claim 18, wherein the lock comprises a valve core and a wedge.

21. A wear cover for use with a wear member attached to the excavation edge of a geotechnical apparatus, the wear cover comprising a body having a longitudinal axis, an upper wear surface, a lower engagement surface opposite the upper wear surface to engage the wear member, a front connecting portion engaging the wear member, an opening extending through the upper wear surface and the lower engagement surface, and a rear connecting portion, wherein the front connecting portion has a front wall extending from the lower engagement surface and a protrusion extending forward from the front wall of the front connecting portion, the opening has a front wall defining a portion of the opening, and the rear connecting portion extends forward from the front wall of the opening to engage a lock, wherein the front connecting portion and the rear connecting portion retain the wear cover to the wear member.

22. The wear cover of claim 21, comprising a sidewall extending inwardly from the upper wear surface to cover the side of the wear member and resist lateral loads.

23. The wear cover of claim 22, wherein the wear cover includes engaging wings on each sidewall, and each engaging wing includes a rearward support wall to engage a forward support wall on the wear member.

24. The wear cover of claim 23, wherein each of the engagement wings tapers in a direction orthogonal to each other toward the front portion of the wear member.

25. The wear cover of claim 21, wherein the front connecting portion includes a protrusion extending forward beyond the upper wear surface and operable to engage with a complementary construction on the wear member.

26. A wear assembly for geotechnical equipment, the wear assembly comprising: A wear member for attaching to a digging edge, the wear member comprising a front end and a forked leg extending rearward from the front end, each leg comprising an inner surface facing the digging edge, a rear wall, and a locking opening; Wear cover according to any one of claims 21 to 25; as well as A lock for securing the wear cover to the wear member and the wear member to the excavation edge.

27. A valve core for locking and securing a wear member to a base for a geotechnical device, the valve core comprising: An elongated body defining a main axis and a vertical axis, the main axis extending along the elongated body, the vertical axis extending in the direction perpendicular to the valve core when viewed in a side view, and two arms extending perpendicular to the vertical axis, parallel to each other, and configured to capture part of the wear member.

28. The valve core of claim 27, wherein the elongated body includes a head at one end of the elongated body, a leg extending from the head along the axis of the body, the head defining an upper arm and the leg defining a lower arm.

29. The valve core of claim 28, wherein the head extends laterally beyond the leg to form a pair of shoulders on the leg.

30. The valve core of claim 27, wherein when viewed from a frontal view, the main body axis is aligned with the vertical axis, and when viewed from a side view, the main body axis is offset and tilted relative to the vertical axis.

31. The valve core of claim 27, wherein each arm includes an end having a convex profile.

32. A lock for securing a wear member to the base of a geotechnical device, the lock comprising a valve core according to any one of claims 27 to 31 and a wedge configured to engage the valve core to form the lock.

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