CN101529023B

CN101529023B - Wear assembly for an excavating bucket

Info

Publication number: CN101529023B
Application number: CN200780039098XA
Authority: CN
Inventors: 罗伯特·麦克兰汉; 特里·L·布里斯科; 丽贝卡·A·范拉登; 菲尔·梅茨钱; 卡罗林·夏皮罗
Original assignee: Esco Corp
Current assignee: Esco Corp
Priority date: 2006-10-24
Filing date: 2007-10-23
Publication date: 2012-03-07
Anticipated expiration: 2027-10-23
Also published as: BRPI0717340B1; WO2008051966A3; NZ575959A; EP2076633A4; EP2076633A2; PL2076633T3; CN101529023A; HK1131647A1; CA2663881A1; AU2007309015A1; BRPI0717340A2; AU2007309015B2; PT2076633T; CA2663881C; ZA200902334B; ES2611991T3; EP2076633B1; CL2007003063A1; WO2008051966A2; PE20081127A1

Abstract

A wear assembly for protecting the digging edge of a bucket which includes a wear member having a lock-receiving hole in one ieg and an upstanding rib along the other leg. The rib extends axially along the leg to be received into a slot in a base fixed to the lip of the bucket. The rib has a rear end that engages the base to hold the rear end of the rib between the base and the lip. The wear member further includes an interior surface that has a front portion formed with a curve to wrap around the digging edge and a plurality of stabilizing surfaces. The lock has a latch and a threaded wedge received into the passage to move the latch to its holding position to maintain the lock in the assembly during use.

Description

The wear assembly that is used for bucket

Technical field

The present invention relates to a kind of wear assembly that is used to protect the digging edge of similar items such as bucket.

Background technology

Bucket generally bears abominable condition of work.Wear member is set to prevent said digging edge premature wear usually.Such wear member has been taked a lot of different forms.For example, wear member is fixed to the lip of scraper bowl through using the solid lock configuration of Webster (Whisler-style), and the Webster that for example uses in No. the 4570365th, the United States Patent (USP) is locked configuration admittedly.Yet these locks need form through hole and use bigger striker voussoir is driven into suitable position in lip.Wear member also is fixed to the lip of scraper bowl through T shape base portion and no firing pin lock, for example disclosed striker in United States Patent (USP) the 5088214th and No. 7080470.Though these systems provide improvement with respect to the system in past, but still hope improves the value of stability, intensity, manufacturability, wear member.

Summary of the invention

The present invention relates to a kind of improved wear assembly with wear member; Said wear member is used to protect the preceding digging edge of excavating equipment, the abrasion highly stable, firm, that stand of said wear member reduce, use easily and make, safe, streamlined and when end-of-life obsolete material few.

In one aspect of the invention, said wear assembly comprises removable wear member, and this wear member comprises that pair of leg is to cross over the lip (perhaps sidepiece) of bucket.One of them leg is provided with the hole that is used to hold lock so that said wear member is fixed to lip, and another leg comprises upright rib along its inner surface.Said rib extends axialiy rearward to be in the groove that is slidably received within base portion, and said base portion is fixed to lip so that support.

In another aspect of this invention, one of them leg of wear member comprises rib, and said rib has and is formed with surface-supported rear end, and said stayed surface does not have leg and deviates from another leg.The fixed surface of said support surface engages base portion is so that be fixed on the rear end of rib between base portion and the lip (or sidepiece), so that under load, support.

In another aspect of the present invention, said wear member comprises inner surface, and the lip of said inner surface and said scraper bowl (or side) is overlapping in the face of also.Said inner surface has the front portion, and this front portion is formed with substantially uniform curvature to surround said lip and a plurality of surface of stability that separates.Said surface of stability extension is roughly the central axial plane that is parallel to said lip, to be used for the unique texture that stability increases and stress reduces.

In another aspect of the present invention, said wear member is formed with being connected of tongue and groove with base portion, and wherein said base portion is formed with central groove and said wear member has central tongue to be installed in the said groove.Each track that all comprises cooperation of said tongue and groove is to be fixed to said base portion with said wear member.Said groove to the front end of open front through said base portion to hold said tongue.This structure provides stable, reliable and firm connection between easy-to-use parts.

In another aspect of the present invention; The lock that said wear member is fixed to said scraper bowl comprises main body, the movable lock pin that is provided with passage and is contained in voussoir in the said passage so that said lock pin is moved to its permanent position, in use said lock is remained in the assembly.

In another aspect of the present invention, said lock comprises threaded wedge, and this threaded wedge is contained in the lock main body and so that lock pin is moved to said lock is remained on the position in the said assembly.Said lock pin can move between holding position and off-position, and lock pin prevents to lock undesirable loss in said holding position, and lock pin allows lock to move in said off-position.

In another aspect of the present invention, threaded wedge is provided with elastomeric material, and said elastomeric material compresses so that prevent the lax of said threaded wedge through the thread surface of complementation.In a preferred embodiment, said elastomeric material is an elastomeric band, and it is fixed in the helicla flute of said threaded wedge.

Description of drawings

Fig. 1 is the decomposition diagram according to wear assembly of the present invention, and wear assembly will be fixed to bucket lip.

Fig. 2 is the part phantom drawing of bucket lip, is omitted at this wear assembly of the present invention.

Fig. 3 is the wear assembly phantom drawing that shaft section exposes.

Fig. 4 is the top perspective of the base portion of wear assembly.

Fig. 5 is the bottom perspective view of base portion.

The front perspective view of the wear member of Fig. 6 wear assembly.

Fig. 7 is the rear view of wear member.

Fig. 8 is wear member and the phantom drawing of base portion after the assembling.

Fig. 9 is the anterior decomposition diagram of the lock of wear assembly.

Figure 10 is the rear portion decomposition diagram of said lock.

Figure 11 is the partial cross section view of wear assembly of the present invention.

Figure 12 is the partial cross section view with wear assembly of alternative lock.

Figure 13 is the phantom drawing of said alternative lock.

Figure 14 is the phantom drawing of the main body of said alternative lock.

Figure 15 and 16 is the phantom drawings that are included in the lock pin in the said alternative lock.

Figure 17 is the phantom drawing of the threaded wedge in said alternative lock, used.

Figure 18 is the cross sectional view of optional threaded wedge.

The specific embodiment

According to the present invention, wear assembly 1 is set to be used to be connected to excavating equipment, for example scraper bowl.The present invention will combine hereinafter shield (shroud) to load-transport-topple over that (load-haul-dump, LHD) connection of the lip of scraper bowl is discussed.Yet, the invention is not restricted to the connection of shield or LHD scraper bowl.For example, the present invention can be used to shield is fixed to different types of scraper bowl, shield is installed between the tooth that separates, and/or the wear member (for example wing plate or connector) of fixing other kinds.Though show a kind of lip in the drawings, the present invention can use with the lip of other kinds with other structures and cross section.In addition; The wing plate of installing along the sidewall of the scraper bowl that closes on lip can have identical or similar structure; For the application's purpose, the digging edge of scraper bowl will be believed to comprise the leading edge of scraper bowl sidepiece, and the leading edge of said wing plate and said lip is installed in said scraper bowl sidepiece.In addition, in order to describe simple purpose, the present invention discusses with opposing relation sometimes, for example upper and lower, forward and backward, vertical, level or the like.These relations will be regarded as the orientation (except as otherwise noted) with respect to element among Fig. 1, and not be appreciated that limitation of the present invention.As understandable, wear assembly can use and be orientated in many ways.

Wear assembly 1 comprises wear member 3, base portion 5 and the fixing lock 7 of wear member (Fig. 1 and Fig. 3) separably.Wear assembly installs to and is fixed on the lip 12 of scraper bowl etc.Lip 12 comprises inner surface 14, external surface 16 and leading edge 17 (Fig. 2).Scallop or recess 18 preferably form to hold passing through of lock 7 along leading edge 17.Each scallop 18 is preferably formed to having uniform, continuous arcuate surfaces 19; Make this arcuate surfaces be no more than about 180 degree, so that the load of making easily and providing firm base portion to be applied to bear around extending to the curvature of cardinal principle perpendicular to the axle extension of lip.Yet, scallop can form have curvature heterogeneous, discontinuous or the shape of corner angle is arranged, and/or form all or partial closures.In some environment, scallop can be omitted, and makes boss extend farther from lip.

Base portion 5 is fixed on the lip 12 (Fig. 1) on each scallop 18.Though base portion 5 preferred weld are to lip, they can be cast into the integral part of lip or pass through mechanical method fixation.In addition, though for simple and the preferred one piece of intensity, each base portion also can form a plurality of parts whole or that separate.Each base portion 5 has the pair of leg 21,22 (Fig. 1 and 3-5) that strides across lip 12.First or inside leg 21 set along the inner surface of lip 12 14, and second or outer legs 22 set along external surface 16.Outer leg 22 is grown to lock with base portion 5 than interior leg 21.Yet said leg is can the identical or interior leg of length longer.In addition, base portion can have opposite orientation the leg 21 of winning is extended and second leg 22 extends along inner surface 14 along external surface 16.

Leg

21,22 connects mutually through front end 20.

Second leg 22 comprises the axial groove 26 at center, and this axial groove is provided with a pair of to projecting inward track 24 (Fig. 4) along its opposite side 23.Track 24 limits the fixed surface 25 that separates and face this external surface 16 with external surface 16.Track 24 cooperates with the complementary rails 27 of wear member 3 to prevent that leg 22 from moving away lip.In some cases, for example, in the environment of low-pressure, said track can be omitted (not shown) so that groove provides cross binding fully.Though can omit, support 30 preferably is arranged on the rear end (Figure 4 and 5) of second leg 22.In this structure, groove 26 extends in the support 30 to limit opening 31, and said opening is between support 30 and outer wall 16 when base portion is welded to lip 12.Though show the opening 31 of sealing, groove 26 can wholely extend through support 30 to be limited to the opening that all open at two ends.Opening also can be limited in the leg 22 and not increase support.In every kind of situation, opening 31 holds the bearing 33 of wear member 3 to strengthen and under heavy load, to stop the damage of wear member.Groove 26 also passes the front end 20 of base portion 5 and substantially aims at scallop 18 to open front.

Support 30 is also preferred to be extended and laterally surpasses leg 22 to limit antetheca 34 in abutting connection with the rear end 35 of shield 3 and therefore reduce shield moving backward under load, and this reduces the stress and the abrasion of the wear member 3 on the base portion 5 conversely.Support 30 also preferably have equate with leg 22 or bigger thickness with the surface area of maximization with shield 3 adjacency, and when the scraper bowl counter motion, play the effect of the baffle plate of great soil group material.The baffle surface 36 that turns forward from external surface 16 preferably forms with guiding great soil group material away from pedestal and shield after assembling along the rear side of support 30.Leg 22 be preferably formed for open type structure with opening 37 to reduce required iron and steel amount and to help the welding of pedestal to lip.

The front end 20 of base portion 5 surrounds the leading edge 17 of lips 12, makes the inner surface 40 (that is, in the face of the surface of lip 12) of pedestal form substantially the shape consistent (Fig. 1,4 and 5) with its fixing specific lip, yet also deviation can be arranged.In this case, inner surface 40 comprise vertical surface 41 with set against front edge 17, upper surface 42 with against the inclined-plane 43 of inner surface 14 and soffit 44 with against external surface 16.If the front portion of lip has crooked shape or other shapes, inner surface 40 will change to hold the shape of lip.The front end 20 of base portion 5 preferably has crooked preceding bearing surface 48 and concentrates and abrasion with the stress that minimizes between wear member and the base portion.In preferred construction, front surface 48 has substantially curvature uniformly, but other configurations also are possible.Groove 51 is formed in first leg 21, with groove 26 perpendicular alignmnets that are used to hold lock 7.

The surface of stability 49 is formed in the front end 20, near two

legs

21,22 with the surface of stability on the complimentary engagement wear member 3 50 (Fig. 1,4 and 5).The surface of stability 49 preferred sizes are constrained to makes when front surface 48 surrounds the leading edge of lip to be significant continuous substantially even curved surface.For stable, the said surface of stability also preferably along the side 93 of base portion 5, still can be arranged on other positions.In addition; The upper and lower surface of stability 49 is through each side 93 cardinal principle perpendicular alignmnet; Make the upper and lower surface of stability 49 be aligned with each other substantially through a side 93; And the said upper and lower surface of stability 49 is through another side 93 aligned in general, but other positions also are fine.The surface of stability 49,50 preferred planar and horizontal planes promptly, are parallel to the central axis plane P of lip 12.

Shown in structure in for the wear member 3 of shield has preceding working portion 66, this part is gradually reduced to narrower leading edge 68; And mounting portion 70, back, this part bifurcated is to limit first or inside leg 72 and second or outer legs 74 (Fig. 1,3 and 6-8).Said wear member is configured to be arranged on the base portion 5, makes

leg

72,74 stride across lip 12.In a preferred construction, wear member 3 is installed on the lip 12, makes the leg 72 of winning cover inner surface 14 and second leg, 74 covering external surfaces 16.Yet said leg can reverse so that first leg 72 is outer legs and second leg 74 is inside leg.Wear member 3 has in the face of said lip and the inner surface 80 overlapping with this lip.Said inner surface 80 comprise outer legs 74 inner face 83, inside leg 72 inner face 84 and in the interior corner surface 86 of

leg

72,74 cross sections.The inner surface 83 of leg 74 is overlapping with leg 22 and external surface 16, and the inner surface 84 of leg 72 is overlapping with leg 21 and inner surface 14.Inner surface 80 along interior corner surface 86 has middle body 88 and sidepiece 90.Middle body 88 be complementary with the front surface 48 of base portion 5 substantially and in use with this front surface adjacency.Middle body 88 is recessed to form sidewall 91 with respect to sidepiece 90, and the side 93 of this sidewall and base portion 5 is side by side to increase cross binding.

In preferred construction, define bearing surface 85 (preferably having uniform curve substantially), this crooked bearing surface 85 and preceding the bearing surface 48 relative and adjacency of bending along the inner surface 80 of middle body 88.The stress that does not have the edge to reduce this part on the preceding bearing surface of wear member and base portion is concentrated; Promptly; It is concentrated that the cardinal principle on two surfaces at preceding bearing surface place cooperates curvature to reduce stress uniformly; Because abrasion part in use is easy on base portion, move, said stress possibly take place at the turning of other parts concentrate.

Sometimes, heavy vertical load (that is the load that, has vertical component) is applied to the preceding working end 66 of wear member 3.Hope to stop such load, promptly be basically perpendicular to the vertical component of load with the surface of basic horizontal.In the present invention, the front end of inner surface 80 89 forms the uniform curved surface 86 and a pair of surface of stability 50 (Fig. 7), near each

leg

72,74 and middle body 88 with the surface of stability on the engage base 5 49 (Figure 4 and 5).The said surface of stability 49,50 provides better resistance and bigger stability under the vertical load for wear member 3.Generation for fear of long edge; The surface of stability 49,50 is limited to the position of dispersion; Preferably extend the front end (being no more than half the altogether) that sub-fraction only runs through wear member 3 and base portion 5, and the side that is preferably placed at area supported 48,86 is to increase stability.Like this, the benefit that is obtained by the area supported of bending is not lost by the use of the said surface of stability 49,50.Transitional surface 81,87 is set to the acute angle that reduces the surface of stability 49, the contact between 50 and avoid stress to concentrate.

Rib 82 uprightly is arranged on the inner surface 83 of leg 74 to be contained in the groove 26 (Fig. 1,3 and 6-8) vertically.Rib 82 comprises the track 27 that cooperates with track 24; That is, track 27 is contained between the fixed surface 25 of lip 12 and track 24 with support wear member 3 under certain load.Preferably have T shape structure though have the rib 82 of track 84, can use other shapes, for example wedge shape.Perhaps, can there be track, under the for example low load environment in specific occasions.Rib 82 preferably extends across the half the of leg 22 at least, and the whole basically length of most preferably crossing inner surface 83, so that be contained in the groove 26 to minimize available support.Perhaps, said groove can be formed on the rib on wear member 3 and the base portion 5.When shield 3 had been installed, its slid over base 5 and lip 12 were so that inside and outside

leg

72,74 strides across base portion 5 and lip 12.Rib 82 slips in the open front 75 of groove 26 with wieldy mode, so that track 27 cooperates so that leg 22 is remained on lip 12 with track 24.

In preferred construction, the rear end that rib 82 extends beyond leg 74 is contained in the supporter 33 in the opening 31 under the support 30 with qualification, but also can use the rear support of other kinds.For example, supporter 33 can suppose that it comprised fixed surface 95 before the rear end of leg 74, and this fixed surface does not have leg and back to the complementary stayed surface (as 94) of lip with engagement leg 74.Supporter 33 is fixed between stayed surface 94 and the lip 12 to strengthen the support of wear member 3.The cooperation of supporter 33 and bearing 30 replenishes the resistance that is provided by track 24,27.Through the rear end at leg 22 a kind of like this supporter is provided, can reduces the bending of leg, this reduces the danger of parts fracture conversely.For example, when the vertical load that makes progress is applied to anteriorly 66 the time, shield 3 is easy to move clockwise around preceding digging edge 17.Said move causes that outer legs 22 leaves from the outer wall 16 of lip 12.This action of leaving from outer wall 16 places inside leg 72 with bigger stress, and this causes mobile the obstruction.Though this bending is hindered by

track

24,27, the action of leaving still can produce heavy load to leg.Comprise supporter 33 through the rear end at leg 22, the stress that under load, is pulled outwardly said leg generation will significantly reduce, and therefore, reduce the heavy load danger of fracture down.As a kind of optional structure, particularly under the underload environment,

track

24,27 can be omitted so that only rely on the supporter 33 in the opening 31.As a kind of selection, the rear end of whole outer legs 74 can be contained under support 30 or other supporters, and not as the extension of rib 82.

Wear member 3 utilizes direct, continuous sliding backward to be assemblied on the base portion 5, and rib 82 slips over openend 75 and gets into groove 26 here.Wear member 3 moving backward on base portion 5 proceeded, up to the front surface 48 (Fig. 3 and 11) of interior corner surface 86 in abutting connection with base portion 5.At this joint, the rear wall 35 of outer legs 74 preferably is set to the next-door neighbour and stops surface 34.Utilize cast member, unpractiacaly be, interior corner surface 86 and rear wall 35 respectively simultaneously abut front face 48 with stop surface 34.Yet, stop 34, two surfaces, surface under the specific load and usually will adjacency after along with abrasion development a period of time of parts through rear wall 35 being set to the next-door neighbour.Though not preferred, stopping surface 34 can be the main area supported of abuts rear wall 35 at first, corner surface 86 abut front face 48 in secondly making.

The inside leg 72 of wear member 3 comprises the hole 96 (Fig. 6-8 and 11) that is suitable for holding lock 7.Lock 7 comprises the main body 101 with front surface 103 and surface, back 105, and movable lock pin 107 (Fig. 9 and 10).In use, lock and make in 7 patchholes 96 that right rearwards abuts with wall 111 is relative in front surface 103 and the groove 51, and the rear wall 113 in surface 105, back and the hole 96 and the antetheca 115 relative (Fig. 1 and 3) of rib 82.Though preferably use rib 82 to form antetheca 115, this wall can form through other boss in the leg 22 or opening.When inserting, lock 7 passes opening 96, scallop 18 and groove 26.In this position, lock 7 hinders wear member 3 and moves from lip 12.As a kind of selection, base portion 5 can extend fartherly to allow just to insert lock 7 without scallop 18 than what illustrate forward with wear member 3.

In a kind of preferred structure, when front and back surface 103,105 towards the bottom or insertion end 109 when extending, they converge (Fig. 9 and 10) toward each other.Similarly, the surface of converging of wall 113,115 preferably covers towards abuts with wall 111.Like this, lock can get into assembly 1 and from assembly 1, come out.Lock pin 107 comprises the rigid element 121 that preferably is made up of the steel that is provided with locking projections 122, and the elastomeric element 123 that is formed by foam, rubber or other elastic bodys.The bottom of rigid element 121 limits fulcrum 130 to be installed in the groove 132 to form axis of rotation, and lock pin 107 is around this axis of rotation motion.Said elastomeric element preferably includes ratchet 125, thereby so that be contained in the matching slot 127 of main body 101 lock pin is remained in the chamber 129, but also can fix through additive method.

In lock 7 insertion process, lock pin 107 is pressed elastomeric element 123 through it against the joint of wear member 3 backward.Crooked inclined-plane 131 makes lock pin get into chamber 129 easily backward during insertion.In case locking projections 122 has been removed the obstruction of block 133, said elastomeric element 123 is rigid element 121 outside bias voltages, thereby so that protruding 122 is bonded on and will locks 7 under the block 133 and remain in the wear assembly 10.In order to move lock 7, pry tool inserts so that lock pin 107 is retracted in the chamber 129 along curved surface 131, is released up to block 133.Through with the engaging of the ledge 137 of lock pin 107, pry tool can be pulled out lock 7 from passage 54.When lock pin 107 is pulled, the end face 139 of rigid element 121 in abutting connection with the chamber 129 roof 141 so that lock is through being prized with engaging of said lock pin.Prizing groove 126 also is preferably formed overleaf on 105 to engage second pry tool or alternative and prizes the position and will lock 7 and move from passage 54 with auxiliary.The hole 128 at lock rear portion allows rock fines to be pushed out chamber 129.Recess 117 is formed on the roof 119 in installation process, to hold pry tool.Can use additive method to insert perhaps and shift out stone, perhaps can use other locks.

Alternative lock 200 can be used for wear member 3 is fixed to lip 12 (Figure 12-18).Substantially, lock 200 utilizes threaded wedge 202, and is for example disclosed in No. the 7171771st, the United States Patent (USP), is incorporated into this by reference, replace as lock 7 in employed elastic body.Threaded wedge 202 has from the rear end the 210 circular appearances 208 (Figure 17) that phase down to front end 212.Helicla flute 213 preferred whole length of extending voussoir, but the some parts of voussoir can keep not having screw thread.The tool engagement structure 214 that is used for holding spanner or other instruments 210 limits so that rotate said voussoir in the rear end.

Lock 200 also comprises main body 204 and is similar to said main body and is locked in the lock pin 206 (Figure 12-16) in 7.Main body 204 is formed with the groove 230 (Figure 14) that holds lock pin 206 and threaded wedge 202.Hole 232 is formed on top side 234 and to be defined for threaded wedge 202 is contained in the arrival end in the groove 230.Groove 236 with screw thread 238 is at least one spiral prominence form and preferred a plurality of spiral prominence part 238a, and preferably this groove 36 is provided with the helicla flute on the engage threads voussoir 202 213 along the rear wall 239 of groove 230.Recess 218 is formed on the bottom of groove 208 to hold and to form the pivotal support body of the fulcrum 220 of lock pin 206.

Except rear side 216, lock pin 206 has and lock pin 107 essentially identical 26S Proteasome Structure and Functions; That is, lock pin 206 has locking projections 218, fulcrum 220, ledge 222 and end face 224 (Figure 12,15 and 16).Yet different with lock pin 107, rear side 216 comprises the recess 226 (Figure 16) of the front portion that is suitable for holding threaded wedge 202.The guard ring that is preferably forms such as resilient device 228 can randomly be set to press against wedge 202 and stop it in use to unclamp.Select as another, elastomeric material 229 can randomly be arranged in the thread groove 213 of threaded wedge 202 with engage ridges 238 and therefore stop unclamp (Figure 18) of voussoir.Elastomeric material 229 is the band processed of rubber, foam or other elastic bodys preferably, and said band utilizes adhesive in thread groove 213.The whole length of said elastic webbing 229 preferred extension slots 213, but only can form a part along groove.Elastic webbing 229 can or be used in combination with brake 228 by independent use.Said voussoir 202 with elastic webbing 229 also can be used in other wear assemblies; For example disclosed in No. the 11/818483rd, No. the 6986216th, United States Patent (USP) and No. 7174661 and the U.S. Patent application sequence submitted on June 13rd, 2007, therefore these disclosed contents are incorporated into this by reference.

In use, lock 200 and lock 7 (Figure 12) in the plug-in package 1 similarly.Lock 200 preferred insertion wear assemblies 1, and make threaded wedge 202 parts insert in the groove 230, but voussoir can be installed after main body 204 be set in the said assembly.Threaded wedge 202 is further screwed in the groove 230 with force latch 206 forward so that said locking boss 218 engagement stopper 133 remain in the assembly in use will lock 200 subsequently.Tool engagement structure 240 preferably is arranged on the tail end 210 of voussoir 202 so that help its rotation.

Claims

1. lock that is used for wear member is fixed to excavating equipment comprises: main body, and this main body comprises the passage with arrival end of opening; Lock pin, this lock pin are connected to said main body so that between permanent position and off-position, move; An and voussoir; This voussoir has front-end and back-end; Said passage comprises that first helicitic texture and said voussoir comprise second helicitic texture that engages with first helicitic texture; This voussoir is tapered and is movably received within the passage of said main body through said arrival end towards said front end; In the time of in the front end of said voussoir moves further into away from the passage of said arrival end, said voussoir engages said lock pin so that said lock pin is moved to said permanent position from said off-position, and said voussoir rotation is to move this voussoir in passage.

2. lock according to claim 1, wherein, said second helicitic texture is formed by the helicla flute on the said voussoir.

3. lock according to claim 2 wherein, is provided with elastomeric material to engage said first helicitic texture and to prevent the lax of said voussoir in said helicla flute.

4. according to each described lock of claim 1-3, wherein, the rear end of said voussoir comprises the tool engagement structure, and this tool engagement structure is used for joining tool to rotate said voussoir.

5. according to each described lock of claim 1-3, wherein, said lock pin rotatably is fixed to said main body.

6. according to each described lock of claim 1-3, wherein, said lock pin comprises resilient retainer, and this guard ring engages said voussoir to prevent the lax of said voussoir.

7. lock that is used for wear member is fixed to excavating equipment comprises:

Main body, this main body comprise the passage and at least one spiral prominence part with arrival end of opening;

Voussoir; This voussoir axially is contained in through said arrival end in the passage of said main body, and said voussoir has (1) front-end and back-end, and is tapered towards said front end; (2) helicla flute; This helicla flute partly is bonded on said spiral prominence in the said passage, and (3) tool engagement structure, and this tool engagement structure is used in through the said passage of being bonded on of said groove and said protuberance, axially moving said voussoir at the said voussoir of said passage rotation; With

Lock pin; This lock pin is connected to said main body pivotally so that between permanent position and off-position, move; Said lock pin has the protruding front surface of band, so that engage the block on the said wear member, in use said lock is fixed to suitable position; And the surface, back, to engage said voussoir and to be pressed into the permanent position through said voussoir.

8. lock according to claim 7, wherein, said voussoir comprises in said helicla flute that also elastomeric material is to engage said spiral prominence part and to prevent the lax of said voussoir.

9. according to claim 7 or 8 described locks, wherein, said lock pin comprises resilient retainer, and this guard ring engages said voussoir to prevent the lax of said voussoir.

10. according to claim 7 or 8 described locks, wherein, the back surface of said lock pin comprises depression, and said voussoir is contained in the said depression.

11. a voussoir comprises front-end and back-end and is tapered towards said front end; Circular outer surface, this circular outer surface are provided with and surround said voussoir to limit the helicla flute of helicitic texture; Elastomeric material, this elastomeric material are fixed in the said helicla flute; And the tool engagement structure that is used to rotate said voussoir.

12. voussoir according to claim 11, wherein, said elastomeric material is the band that extends along the whole length of said groove basically.

13. a wear assembly that is used for the lip of bucket comprises:

Base portion, this base portion are fixed to said lip and comprise first area supported;

Working portion and mounting portion, back before wear member, this wear member comprise, mounting portion, said back comprises second area supported; And

Lock; This lock will be contained between said first and second area supporteds so that this wear member is fixed to said lip; This lock comprises main body, and this main body has the passage of being with the arrival end of opening, is connected to the lock pin of said main body between permanent position and off-position, to move; And voussoir with front-end and back-end; Said passage comprises that first helicitic texture and said voussoir comprise second helicitic texture that engages with first helicitic texture, and said voussoir is movably received within the passage of said main body towards front end formation tapering and through said arrival end, in the time of in the front end of said voussoir moves further into away from the passage of said arrival end; Said voussoir engages said lock pin so that said lock pin is moved to said permanent position from said off-position, and said voussoir rotation is to move this voussoir in passage.

14. wear assembly according to claim 13, wherein, said second helicitic texture is formed by the helicla flute on the said voussoir.

15. wear assembly according to claim 14, wherein, elastomeric material is arranged in the said helicla flute to engage said first helicitic texture and to prevent that said voussoir is lax.

16. according to each described wear assembly of claim 13-15, wherein, the rear end of said voussoir comprises the tool engagement structure, this tool engagement structure is used for joining tool to rotate said voussoir.

17. wear assembly according to claim 15, wherein, said lock pin rotatably is fixed to said main body.

18. according to claim 1,7,11 and 13 each described wear assemblies, wherein, said lock pin comprises resilient retainer, this guard ring engages said voussoir to prevent the lax of said voussoir.