CN113006192A - Connecting pin assembly for connecting wear part to machine tool and wear system - Google Patents

Abstract

The invention relates to the technical field of connecting pins, and discloses a connecting pin assembly for connecting a wear part to an implement and a wear system, wherein the connecting pin assembly comprises: the pin sleeve is sleeved on the connecting pin; one end of the pin sleeve is provided with a first end face, and one side of the connecting pin, which is close to the first end face, is provided with a second end face; wherein, one of the first end surface and the second end surface is provided with a plurality of mounting grooves, and the other end surface is provided with a plurality of clamping grooves; the four or eight or twelve mounting grooves and the clamping grooves are uniformly distributed on the first end surface or the second end surface; the elastic clamping pieces are arranged in the mounting grooves; the connecting pin can rotate relative to the pin sleeve so that the elastic clamping piece is clamped in or separated from the clamping groove. The connecting pin assembly has the advantages of convenience in processing, difficulty in failure caused by influence of soil, sand and water, and high structural strength.

Description

Connecting pin assembly for connecting wear part to machine tool and wear system

Technical Field

The present invention relates to the field of connecting pin technology, and more particularly, to a connecting pin assembly and wear system for attaching a wear member to an implement.

Background

Excavating machines that dig, split or otherwise move earth, rock, debris or other material are often equipped with a bucket, and the teeth of the bucket are susceptible to wear during repeated operations, requiring timely replacement of such worn parts after they have worn to some extent.

The existing wear parts are fixed with machines in a welding mode, but are inconvenient to replace after being worn; also, by hammering a wear part to secure it to an implement, there are often instances where hammering is not in place, and where the implement is being worked on, there is often no hammering tool and installation is inconvenient. Thus, as disclosed in CN106368260A, the wear member holding system is detachably fixed to the tool by a welding-free and hammering-free mounting method, so as to reduce the difficulty of replacing and disassembling the wear member.

For example, patent "CN 103168138B" discloses a connector pin assembly that is insertable into aligned openings in nested ground engaging wear and support structures to releasably retain the wear member on the support structure. The assembly has a tubular housing non-rotatably received in the opening. The connector pin extends longitudinally through the housing and is rotatable relative to the housing in selectively variable rotational orientations in which the pin is releasably locked to the housing by cooperating detent structures carried by the housing and pin. The outer end of the pin performs two functions controlled by the rotation of the pin relative to the housing. In the scheme, a plurality of braking grooves are formed in the outer cylindrical surface of the center pin along the axial direction of the center pin and are used for being matched with the elastic braking component, muddy water and sandy soil easily enter the braking grooves in the long-time operation process of the machine tool, the braking grooves are filled, the braking structure fails, the clamping stagnation is easily caused, the braking grooves are inconvenient to process, and the strength of the center pin is weakened due to the fact that the center pin is a direct stressed component.

Disclosure of Invention

In view of the above-mentioned deficiencies of the prior art, the present invention is directed to a connecting pin assembly and wear system for connecting a wear member to a tool that is easy to machine, resistant to galling and failure, and has high strength.

The present invention solves the technical problem by providing a connecting pin assembly for connecting a wear part to an implement, comprising:

the pin sleeve is sleeved on the connecting pin; one end of the pin sleeve is provided with a first end face, and one side of the connecting pin, which is close to the first end face, is provided with a second end face; wherein, a plurality of mounting grooves are arranged on one of the first end surface and the second end surface, and a plurality of clamping grooves are arranged on the other one of the first end surface and the second end surface; the four or eight or twelve mounting grooves and the clamping grooves are uniformly distributed on the first end surface or the second end surface;

a plurality of elastic snap members disposed in the mounting groove; the connecting pin can rotate relative to the pin sleeve, so that the elastic clamping piece is clamped into or separated from the clamping groove.

Further, the connecting pin comprises a pin body and a connecting piece detachably connected with the pin body, and the second end face is located on the pin body or on the connecting piece.

Further, the pin body comprises a first limiting part, a pin shaft and a connecting part which are connected in sequence; the first limiting part is connected to one end of the pin shaft, and the connecting part is connected to the other end of the pin shaft; the connecting piece is connected to the connecting part.

Furthermore, a second limiting part is arranged at one end, far away from the first limiting part, of the connecting piece; first spacing portion and the spacing portion of second are the symmetry and set up, and all are equipped with the recess that supplies the spanner joint in first spacing portion and the spacing portion of second.

Furthermore, the connecting piece also comprises a cylinder which is integrated with the second limiting part, a rectangular hole or a square hole is formed in the cylinder, and an accommodating hole communicated with the rectangular hole or the square hole is formed in the cylinder along the radial direction of the cylinder;

the cross section of the connecting part is rectangular or square, the connecting part is arranged in the rectangular hole or the square hole, a threaded hole is formed in the connecting part, and a bolt penetrates through the accommodating hole to be connected in the threaded hole.

Furthermore, one end of the elastic clamping piece, which is close to the clamping groove, is provided with a first clamping surface, the clamping groove is provided with a second clamping surface, the first clamping surface is movably attached to the second clamping surface, and the first clamping surface can be switched along different second clamping surfaces;

the first clamping surface and the second clamping surface are both curved surfaces or both spherical surfaces.

Furthermore, the elastic clamping piece comprises an elastic body and a clamping column arranged on the elastic body; the elastic body is provided with a mounting hole, one end of the clamping column is provided with a connecting shaft, and the first clamping surface is arranged at the other end of the clamping column; the connecting shaft is arranged in the mounting hole.

Further, the elastomer is cylindrical, and the elastomer is provided with one or more through holes along its own radial direction.

Further, the one end that the cotter kept away from first terminal surface is equipped with the third terminal surface, the periphery of cotter is equipped with the location arch along its self axial, just the location arch is connected between first terminal surface and the third terminal surface.

Furthermore, the two ends of the pin shaft are respectively provided with an annular groove, and the annular grooves are respectively provided with a sealing ring.

The invention solves the technical problem and adopts the technical scheme that a wear system is also provided, which comprises:

the abrasion part is sleeved on the mounting seat;

the above-described attachment pin assembly for attaching a wear member to an implement; the connecting pin assembly is removably connected between the mount and the wear component;

the cover body is detachably arranged on the mounting seat and is positioned at one end close to the abrasion part.

Compared with the prior art, the invention has at least the following beneficial effects:

according to the structure, the elastic clamping piece is arranged along the axial direction parallel to the pin body, a clamping groove formed in the cylindrical surface of the original pin shaft is eliminated, the processing technology of the pin body is simplified, the clamping groove in the cylindrical surface does not need to be milled, the elastic clamping piece is directly arranged on the first end surface of the pin sleeve and matched with the clamping groove in the connecting piece or the second end surface of the pin body, and the mounting groove and the clamping groove are very simple and convenient to process; in the operation process of the machine, the pin body is a direct stress part (subjected to shearing stress), and a clamping groove on the outer peripheral surface of the pin shaft is eliminated, so that the main body structure of the pin shaft is not weakened, the strength of the pin shaft is ensured, and the service life of a connecting pin assembly is prolonged; and original epaxial draw-in groove of round pin is used for fixing a position with the cooperation of elasticity fastener joint, because the most all is direct contact earth during the machines operation, gravel and sand and water, the operation environment is abominable, earth, gravel and sand and water easily enter into the draw-in groove of round pin axle, fill up the draw-in groove, lead to the unable card of elasticity fastener to go into in the draw-in groove, the joint location structure of draw-in groove and elasticity fastener is out of work, and this structure sets up the draw-in groove on the second terminal surface of connecting piece or round pin axle, be difficult for receiving earth, pollutants such as gravel and sand and water influence, structural stability is high.

In the invention, the cover body is arranged at the top of the mounting seat in the abrasion system and detachably clamped on the mounting seat, so that the mounting seat is protected from abrasion and is easy to replace; wearing and tearing parts play certain limiting displacement to the lid, prevent that the lid from droing along the mount pad, structural stability is high.

Drawings

FIG. 1 is a schematic diagram of a wear system;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic structural view of the connecting pin assembly;

FIG. 4 is a schematic plan view of FIG. 3;

FIG. 5 is an exploded view of the connecting pin assembly;

FIG. 6 is a schematic view of the structure of FIG. 5 from another perspective;

FIG. 7 is a side view of the connecting pin assembly;

fig. 8 is a cross-sectional view taken along B-B of fig. 7.

In the figure, the position of the upper end of the main shaft,

1. a pin body; 10. a first limiting part; 11. a pin shaft; 111. an annular groove; 12. a connecting portion; 121. a threaded hole;

2. a connecting member; 20. a second end face; 21. a second limiting part; 22. a cylinder; 201. a card slot; 2011. a second engaging surface; 202. a rectangular hole or a square hole; 211. a groove; 221. an accommodation hole;

3. a pin bush; 30. a first end face; 301. mounting grooves; 31. a third end face; 32. positioning the projection;

4. an elastic engaging member; 40. an elastomer; 41. a clamping column; 401. mounting holes; 402. a through hole; 411. a first engaging surface; 412. a connecting shaft;

5. a bolt; 6. a seal ring; 7. a mounting seat; 8. a wear component; 9. a cover body;

A. a connecting pin assembly.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 3-8, a connecting pin assembly a for attaching a wear member 8 to an implement includes a connecting pin, which may be integral or separable, and the present solution is described in detail primarily in terms of a split type; namely, the connecting pin comprises a pin body 1 and a connecting piece 2 which is detachably connected with the pin body 1; and a pin body 3 and a plurality of resilient engagement members 4. Specifically, the connecting pin assembly A comprises a connecting pin and a pin sleeve 3, wherein the pin sleeve 3 is sleeved on the connecting pin; one end of the pin sleeve 3 is provided with a first end surface 30, and one side of the connecting pin, which is close to the first end surface 30, is provided with a second end surface 20; wherein, one of the first end surface 30 and the second end surface 20 is provided with a plurality of mounting grooves 301, and the other one of the first end surface and the second end surface is provided with a plurality of clamping grooves 201; a plurality of elastic engaging pieces 4, the elastic engaging pieces 4 being disposed in the mounting groove 301; the connecting pin (i.e. the pin body 1 and the connecting piece 2) can rotate relative to the pin sleeve 3, so that the elastic clamping piece 4 is clamped in or separated from the clamping groove 201. The explanation is that: the connecting pin comprises a pin body 1 and a connecting piece 2 detachably and fixedly connected with the pin body 1, and the second end face 20 is positioned on the pin body 1 or the connecting piece 2; in other words, the elastic engaging member 4 may be movably disposed between the pin body 1 and the pin bush 3, or may be movably disposed between the connecting member and the pin bush, and the following description of the present embodiment will mainly describe the elastic engaging member 4 disposed between the connecting member 2 and the pin bush 3 in detail.

The connecting pin assembly a includes: the pin comprises a pin body 1, wherein the pin body 1 comprises a first limiting part 10, a pin shaft 11 and a connecting part 12 which are sequentially connected; the first limiting part 10 is connected to one end of the pin shaft 11, and the connecting part 12 is connected to the other end of the pin shaft 11; the first limiting portion 10, the pin shaft 11 and the connecting portion 12 are integrally formed, and when the connecting pin assembly is installed in a wear system, the first limiting portion 10 plays a limiting role after being installed and rotated to a preset angle. The connecting piece 2 is connected to the connecting part 12, and generally, the connecting piece 2 is detachably connected to the connecting part 12; one end of the connecting piece 2 close to the pin body 1 is provided with a second end face 20; specifically, the cross section of the connecting portion 12 is rectangular or square, and is matched with the rectangular hole or the square hole 202 on the connecting member 2, and the connecting portion is fixed by the bolt 5, so that the pin body 1 and the connecting member 2 are fixedly connected without relative rotation. The pin bush 3 is sleeved on the pin shaft 11 and is positioned between the first limiting part 10 and the connecting piece 2; one end of the pin sleeve 3 close to the second end face 20 is provided with a first end face 30; a plurality of mounting grooves 301 are arranged on one of the second end surface 20 and the first end surface 30, and a plurality of clamping grooves 201 are arranged on the other one of the second end surface and the first end surface; it can be understood that, in one solution of the present embodiment, a plurality of mounting grooves 301 are opened on the second end surface 20, and a plurality of card slots 201 are opened on the first end surface 30; in another scheme, a plurality of mounting grooves 301 are formed on the first end surface 30, and a plurality of clamping grooves 201 are formed on the second end surface 20; the difference between the two schemes is that the installation direction of the elastic engaging member 4 is turned, and the embodiment only describes the case that the engaging groove 201 is opened on the second end surface 20 of the connecting member 2 and the installation groove 301 is opened on the first end surface 30 of the pin sleeve 3. The elastic clamping pieces 4 are arranged in the mounting grooves 301, wherein the number of the elastic clamping pieces 4 is the same as that of the clamping grooves 201 and that of the mounting grooves 301, and the elastic clamping pieces 4 correspond to the mounting grooves 301 one by one; the pin body 1 and the connecting piece 2 can rotate relative to the pin sleeve 3, so that the elastic clamping piece 4 is clamped into or separated from the clamping groove 201, namely in the actual use process, the pin sleeve 33 is fixed, the pin body 1 or the connecting piece 2 is rotated, the pin body 1 and the connecting piece 2 are linked, the elastic clamping piece 4 is forced to be clamped into different clamping grooves 201, and the pin body 1 and the connecting piece 2 rotate for the pin sleeve 3 at a certain angle.

Preferably, the number of the mounting grooves 301 and the number of the slots 201 are four, eight or twelve, and the mounting grooves 301 and the slots 201 are uniformly distributed on the second end surface 20 or the first end surface 30, and when the number of the mounting grooves 301 and the number of the slots 201 are four, the pin body 1 and the connecting member 2 rotate ninety degrees relative to the pin sleeve 3, and the elastic clamping member 4 is clamped into another slot 201; when the number of the mounting grooves 301 and the number of the slots 201 are eight, the elastic clamping piece 4 can be clamped into the other slot 201 when the pin body 1 and the connecting piece 2 rotate for forty-five degrees relative to the pin sleeve 3; when the number of the mounting grooves 301 and the number of the slots 201 are twelve, the elastic clamping piece 4 can be clamped into the other slot 201 when the pin body 1 and the connecting piece 2 rotate for thirty degrees relative to the pin sleeve 3; when the elasticity fastener 4 is gone into another draw-in groove 201 from a draw-in groove 201 roll-off card, there is obvious block and feels, easily judge the angle of selling body 1 and connecting piece 2 pivoted, control is sold body 1 and connecting piece 2 and is installed and target in place, make the difficult not hard up of wearing and tearing system, in this scheme, it is optimum to be equipped with mounting groove 301 and draw-in groove 201 for twelve, carry out the detailed description, sell body 1 and connecting piece 2 and rotate thirty degrees at every turn, just there is once obvious block and feels, easily judge the turned angle of selling body 1 and connecting piece 2.

The elastic engaging member 4 has a first engaging surface 411, the card slot 201 has a second engaging surface 2011, the first engaging surface 411 is movably attached to the second engaging surface 2011, the first engaging surface 411 can be switched between the second engaging surfaces 2011 along different directions, and the first engaging surface 411 and the second engaging surface 2011 are both curved surfaces or both spherical surfaces. The first engaging surface 411 and the second engaging surface 2011 are matched to be engaged reliably, and the first engaging surface 411 can slide into and out of the second engaging surface 2011 easily, so that the operation is simple. Specifically, the elastic engaging member 4 includes an elastic body 40 and a engaging column 41 provided on the elastic body 40; the elastic body 40 is provided with a mounting hole 401, one end of the clamping column 41 is provided with a connecting shaft 412, and the first clamping surface 411 is arranged at the other end of the clamping column 41; the connecting shaft 412 is arranged in the mounting hole 401, and the matching of the connecting shaft 412 and the mounting hole 401 prevents the clamping column 41 from falling and losing efficacy in the switching process.

Further preferably, the elastic body 40 is arranged in a cylindrical shape, and the elastic body 40 is provided with one or more through holes 402 along its own radial direction, in this drawing, a case that three through holes 402 are provided on each elastic body 40 is mainly described, and the arrangement of the through holes 402 makes the elastic body 40 easily elastically deform at the middle part, that is, the arrangement of the through holes 402 mainly serves to provide a guide for the elastically deformed part of the elastic body 40.

In the practical use process, the elastic clamping piece 4 is arranged along the axial direction parallel to the pin body 1, the clamping groove 201 formed in the cylindrical surface of the original pin shaft 11 is eliminated, the processing technology of the pin body 1 is simplified, and the clamping groove 201 in the cylindrical surface is not required to be milled, the elastic clamping piece 4 is directly arranged on the first end surface 30 of the pin sleeve 3 and matched with the clamping groove 201 in the connecting piece 2 or the second end surface 20 of the pin body 1, and the mounting groove 301 and the clamping groove 201 are both simple and convenient to process; in the operation process of the machine, the pin body 1 is a direct stress part (subjected to shearing stress), and the clamping groove 201 on the outer peripheral surface of the pin shaft 11 is eliminated, so that the main body structure of the pin shaft 11 is not weakened, the strength of the pin shaft 11 is ensured, and the service life of the connecting pin assembly is prolonged; and original epaxial draw-in groove 201 of round pin 11 is used for fixing a position with 4 joint cooperations of elasticity fastener, because the most all is direct contact earth during the machines operation, gravel and sand and water, the operation environment is abominable, earth, gravel and sand and water easily enter into the draw-in groove 201 of round pin axle 11, fill up draw-in groove 201, lead to elasticity fastener 4 can't block into in draw-in groove 201, draw-in groove 201 and the joint location structure of elasticity fastener 4 lose efficacy, and this structure sets up draw-in groove 201 on connecting piece 2 or the second terminal surface 20 of selling the body 1, be difficult for receiving earth, pollutants such as gravel and sand and water influence, structural stability is high.

As shown in fig. 3, 5, 7-8, a third end face 31 is provided at an end of the pin bush 3 away from the first end face 30, a positioning protrusion 32 is provided at an outer periphery of the pin bush 3 along an axial direction thereof, when the connecting pin assembly is installed in a wear system, the positioning protrusion 32 is engaged with a corresponding positioning hole to play a role of rotation prevention and positioning, and the positioning protrusion 32 is connected between the first end face 30 and the third end face 31, that is, the positioning protrusion 32 penetrates through the entire pin bush 3, so that a contact area between the positioning protrusion 32 and the mounting seat 7 or the wear part 8 is increased, and a structural strength of the pin bush 3 itself is increased.

A second limiting part 21 is arranged at one end of the connecting piece 2 far away from the second end face 20; the first limiting part 10 and the second limiting part 21 are symmetrically arranged, when the connecting pin assembly is installed in a wear system, the first limiting part 10 and the second limiting part 21 rotate to a preset angle after being installed, and the first limiting part 10 and the second limiting part 21 jointly play a limiting role, so that the stress balance of the connecting pin is guaranteed. And all be equipped with the recess 211 that supplies the spanner joint on first spacing portion 10 and the spacing portion 21 of second, recess 211 in this scheme is interior hexagon, conveniently rotates first spacing portion 10 or the spacing portion 21 of second, can dismantle fixedly through connecting pin connection between wearing and tearing part 8 and the mount pad 7, does not need the welding also need not the hammering, and dismouting and later stage are changed, are maintained all very conveniently.

The connecting member 2 further includes a cylinder 22 integrally disposed with the second limiting portion 21, the second end face 20 is provided with a rectangular hole or a square hole 202, and the cylinder 22 is provided with an accommodating hole 221 along a radial direction thereof, the accommodating hole being communicated with the rectangular hole or the square hole 202; the cross section of the connecting part 12 is rectangular or square and is arranged in the rectangular hole or the square hole 202, the connecting part 12 is provided with a threaded hole 121, and the bolt 5 penetrates through the accommodating hole 221 and is connected in the threaded hole 121, so that the detachable fixed connection between the connecting part 2 and the pin body 1 is realized.

Preferably, as shown in fig. 5, the two ends of the pin shaft 11 are respectively provided with an annular groove 111, and the annular grooves 111 are respectively provided with a sealing ring 6, so that the sealing rings 6 prevent soil, sand and stone and water from entering between the pin sleeve 3 and the pin shaft 11, and protect the pin shaft 11.

As shown in fig. 1-2, a wear system of the present invention comprises: the device comprises a mounting seat 7 and a wear part 8 sleeved on the mounting seat 7; the above-described attachment pin assembly a for attaching the wear member 8 to the implement; the connecting pin assembly a is removably connected between the mounting seat 7 and the wear part 8; the abrasion part 8 can be detachably and fixedly arranged on the mounting seat 7 without welding or hammering, and is convenient to disassemble, assemble, replace and maintain at the later stage; and the cover body 9 is detachably arranged on the mounting seat 7 and is positioned at one end close to the wear part 8. In the using process, the cover body 9 is detachably clamped on the mounting seat 7, so that the mounting seat 7 is protected from abrasion and is easy to replace; wearing parts 8 plays certain limiting displacement to lid 9, prevents that lid 9 from droing along mount pad 7, and structural stability is high.

In the scheme, the connecting pin assembly is convenient to process, is not easy to lose efficacy due to the influence of soil, sand and water, and has high structural strength; the wearing system is convenient to disassemble and assemble, easy to maintain and replace and high in structural stability.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims (10)

1. A connecting pin assembly for connecting a wear member to an implement, comprising:

the pin sleeve is sleeved on the connecting pin; one end of the pin sleeve is provided with a first end face, and one side of the connecting pin, which is close to the first end face, is provided with a second end face; wherein, a plurality of mounting grooves are arranged on one of the first end surface and the second end surface, and a plurality of clamping grooves are arranged on the other one of the first end surface and the second end surface; the four or eight or twelve mounting grooves and the clamping grooves are uniformly distributed on the first end surface or the second end surface;

a plurality of elastic snap members disposed in the mounting groove; the connecting pin can rotate relative to the pin sleeve, so that the elastic clamping piece is clamped into or separated from the clamping groove.

2. A connection pin assembly for attaching a wear member to an implement according to claim 1, wherein the connection pin includes a pin body and a connector removably connected to the pin body, the second end face being on the pin body or on the connector.

3. A connecting pin assembly for attaching a wear member to an implement according to claim 2, wherein the pin body includes a first retaining portion, a pin shaft, and a connecting portion connected in series; the first limiting part is connected to one end of the pin shaft, and the connecting part is connected to the other end of the pin shaft; the connecting piece is connected to the connecting part.

4. A connector pin assembly for attaching a wear member to an implement according to claim 3, wherein the end of the connector remote from the first limit stop is provided with a second limit stop; first spacing portion and the spacing portion of second are the symmetry and set up, and all are equipped with the recess that supplies the spanner joint in first spacing portion and the spacing portion of second.

5. A connecting pin assembly for connecting a wear member to an implement according to claim 4, wherein the connecting member further comprises a post integrally formed with the second stop portion, the post defining a rectangular or square aperture, the post defining an receiving bore radially therethrough in communication with the rectangular or square aperture;

the cross section of the connecting part is rectangular or square, the connecting part is arranged in the rectangular hole or the square hole, a threaded hole is formed in the connecting part, and a bolt penetrates through the accommodating hole to be connected in the threaded hole.

6. A kingpin assembly according to any one of claims 1 to 5, wherein the resilient detent member has a first detent surface at an end thereof adjacent the slot, the slot having a second detent surface, the first detent surface being movably engaged with the second detent surface, the first detent surface being switchable between different ones of the second detent surfaces;

the first clamping surface and the second clamping surface are both curved surfaces or both spherical surfaces.

7. The attachment pin assembly for attaching a wear member to an implement of claim 6, wherein the resilient catch comprises an elastomeric body and a catch post disposed on the elastomeric body; the elastic body is provided with a mounting hole, one end of the clamping column is provided with a connecting shaft, and the first clamping surface is arranged at the other end of the clamping column; the connecting shaft is arranged in the mounting hole.

8. A connector pin assembly for attaching a wear member to an implement according to claim 7, wherein the elastomer body is cylindrically configured and is provided with one or more through holes radially disposed along the elastomer body.

9. A kingpin assembly according to claim 1, wherein the end of the housing remote from the first end surface is provided with a third end surface, the housing has a periphery provided with a locating projection axially along the periphery, and the locating projection is connected between the first and third end surfaces.

10. A wear system, comprising:

the abrasion part is sleeved on the mounting seat;

a connection pin assembly for connecting a wear member to an implement as defined in any one of claims 1 to 9; the connecting pin assembly is removably connected between the mount and the wear component;

the cover body is detachably arranged on the mounting seat and is positioned at one end close to the abrasion part.

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