JPH0739678B2 - Liner element and dowel joint manufacturing method - Google Patents

Abstract

An assembly of wear element (11) for installation on the wearable part of a structure engageable with abrasive material including a relatively elongated base element adapted to be secured to the wearable part and a relatively elongated wear element releasably, reversibly mounted on the base element, each of the elements having longitudinally spaced apart dovetail surfaces (30) in one outstanding wall portion and at least one surface in a second opposed outstanding wall portion positioned between the spaced art dovetail surfaces. A method of designing the dovetail connection through a repeating pattern is also disclosed. <IMAGE>

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to replaceable friction or wear or liner elements and methods of forming the same, and in particular, to a worn portion of a structure capable of contacting a frictional friction material. It concerns elements and methods for designing dovetails for them.

The present invention is an improvement on US Pat. No. RE33,454. In this U.S. patent, a pair of spaced apart laterally aligned convergent dovetail joints are used to provide an easily replaceable liner element, which is the underside of a drilling bucket, a mold for scrapers. Cooperated with the base provided on boards, liners for wells, etc. The combination of base and liner elements was intended for mounting in only one direction. This did not satisfy the need for work requiring excursion such as excavation and mining.

It should also be noted that elements that are subject to wear must be replaced more frequently than the base elements to which they are attached.

In accordance with the present invention, a novel construction that allows the use of a single liner element, for example, where two different replacement elements would otherwise have had to be stored, allows Invertibility is achieved. For example, in a bucket it would be advantageous to have liner elements surrounding the corners, but the use of the aforementioned U.S. patent requires having both a right-handed configuration and a left-handed configuration. Thus, according to the present invention, only a single, inflexible exchange element is required. This is important to the operator as buckets are typically used in harsh conditions and limited storage facilities. That is, it is highly desirable that the number of stored parts be reduced.

In addition, the four dovetails have been difficult to manufacture in order to make the proper contact. Also in accordance with the present invention, the novel configuration of the dovetail provides three face contact.
As a result, it was effective in terms of stability, compatibility, and mountability.

More specifically, the liner elements are 1
A pair of longitudinally aligned and longitudinally spaced dovetail surfaces and a third laterally spaced dovetail surface disposed between the dovetail surfaces of the pair. One of the liner element or the base element has a second longitudinally aligned and longitudinally spaced apart forming a side of the third surface.
Of dovetails and a single face interposed between the faces of the pair. As a result, the element having two pairs can be reversibly attached to the element having one pair, and both attachments are effective “3 points” in terms of ease and stability.

If "four-point" contact is desired, each of the base and liner elements has a first and a second pair of longitudinally spaced dovetails, one of the elements having a third and a third. Four
Pairs of longitudinally spaced dovetail surfaces such that the dovetail surfaces of the third and fourth pairs intersect or are interspersed with the dovetail surfaces of the first and second pairs. This allows the element having four pairs to be reversibly attached to the element having two pairs.

The present invention also provides that a pair of opposing walls are provided with a repetitive pattern of surfaces and the elements are defined by laterally cutting at laterally spaced surfaces. It also provides a way to design dovetails. The details of the invention will be apparent from the following description.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring first to FIG. 1, which is of conventional construction, reference A designates a base element A as shown in U.S. Pat. No. RE33,454 and reference B designates a liner element (in this case,
Figure 3 shows a liner for the underside of the dragline bucket. Arrow C indicates the path traveled when element B is attached to base element A. That is, element B
Is first moved upwards into a substantially coplanar state and then slid backwards so that two pairs of dovetail joints (D, E of element A and D ', E'of element B) engage. Are combined. These two pairs of dovetail joint elements are separated by a notch F.

Referring now to FIG. 2, which illustrates the assembly of the present invention, reference numeral 10 generally designates a base element and reference numeral 11 generally designates a liner element. In this embodiment, the base element 10 comprises a substantially flat body 12, which is relatively elongate so as to form end wall surfaces 13, 14 and side wall surfaces 15, 16. One surface 17 of body 12 is an inner surface that is normally secured to a worn portion of a structure, such as a corner portion 18 of a bucket (see FIG. 4) or other structure 318 (see FIG. 13). The outer surface opposite this mounting surface 17 is shown only in FIG. 4 and is labeled 19 and constitutes the surface facing the liner element 11.

The liner element 11 is a body corresponding to the element 10,
It has a wall surface and a surface, and the same reference numerals are used for these, but a prime symbol (') is added.
Thus, in FIG. 3, the body of the liner element 11 is 12 ', the end wall surfaces are 13', 14 'and the side wall surfaces are 15', 16 '. The inner surface 17 '(see FIG. 4) is the surface facing the base element 10 and the outer surface 19' is the surface that is engageable with the wear material.

Referring again to the base element 10 of FIG. 2, the body 12 is integrally provided with four laterally projecting flanges 20, 21, 22, 23, which are relatively long in the longitudinal direction. Note that the cutouts 24, 25 delimit. Flange 20-23
The tip of is shaped to provide an open / convergent surface. The open / convergent surface is defined in two directions, that is, a direction that converges from the outer surface 19 of the base element 10 toward the inner surface 17, and a direction that converges from the end wall surface 14 of the base element 10 toward the end wall surface 13. At the same time, it shows the inclined surface. Hereinafter, the dovetail surface refers to a surface inclined in these two directions, and the dovetail joint portion refers to a portion including the dovetail surface. In addition, these terms described in the claims shall conform to these. The dovetail surface used here is the same as that in the above-mentioned US Pat. No. RE33,454, and the detailed description of the structure and function thereof can be found in US Pat. No. RE33,454.

An example of a dovetail surface is the outer wall surface 26 of the flange portion 22 of the base element 10 (center right hand portion of FIG. 2). When the liner element 11 is moved into engagement with the base element 10, as shown by the arrow 27 in FIG. 2, the flange 22 is received in the notch 28. Then, when liner element 11 is moved in the direction of arrow 29, dovetail surface 26
Engage the corresponding surface 30 of. Typically, the elements 10, 11 are arranged as shown in FIG. 2 when the normal flow of wear material is in the direction of the arrow 29, in which case the dovetail surfaces 26, 30 seat more firmly against one another. Tend. Such movement firmly engages the dovetail surface 31 (mirror image of the dovetail surface 30) against the dovetail surface provided at the tip of the flange 20, and likewise the dovetail surface 32 of the liner element 11 is Element 10
Of the flange 23 of the base element 10 is seated on the dovetail surface 33 of the base element 10.

It has been found effective to tilt the surfaces 30, 31, 32, 34 at an angle of about 15 degrees with respect to the longitudinal centerline 35 of the liner element 11. The dovetail surface of the base element 10, for example the surfaces 26, 33, is
It should be understood that it is inclined at a similar angle to the 0 centerline (not shown). In some cases, in the range of about 10 degrees to about 20 degrees, so that the liner element 11 can be more securely attached and more easily removed.
It has also been found that it is further advantageous to change the angle between the centerline and the dovetail surface. Also, these planes
It is inclined in approximately two directions, for example, the surfaces 30, 3
2, 37, 39 are tilted at a positive angle and the faces 31, 34,
36 and 38 are inclined at a negative angle. Hereinafter, the positive angle means an angle inclined upward in the drawing with respect to the relative moving direction of the wear material with respect to the liner element 11 (indicated by the arrow 29), and the negative angle means the liner element 11.
The angle of inclination of the wear material relative to the moving direction of the wear material is shown in the figure. In addition, these terms described in the claims shall conform to these.

Also, as an aid for forming a more secure fit, the liner element 11 facing the base element 10
The rail 11a is provided on the surface (see FIG. 4). These are also seen in the position adjacent to the rising wall portions G and H in FIG. 1 and are indicated by reference numeral I.

The operation of the above is described in US Pat.
It is very similar to that obtained by the method of the invention of No. However, in order to obtain an effective reversibility according to the invention, an additional flank face 36, 37 is provided just to the right of the lateral centerline 40 in FIG. 2 and a further flank face 38 to the left of the liner element 11 is provided.
39 are provided. These dovetails have a longitudinal centerline 35
It should also be noted that is also symmetric about, so that it is symmetric about the lateral centerline 35. Thus, when the liner element 11 is rotated 180 degrees, the liner element 11 looks similar to FIG. 2, but with the dovetail surface 39 in the dovetail surface 30 position and the dovetail surface 37 in the dovetail surface 32 position. .

On the face of the liner element 11, the same as the one provided at the positions G and H in FIG.
The rising wall portions are provided at positions 1 and 42. More particularly, the surface remote from the surface subject to wear is integrally provided with projecting portions which are laterally spaced from each other, the projecting portions forming mutually facing walls with various dovetail surfaces. . Such opposing walls are mirror images and are equidistant from the longitudinal centerline 35. In addition, each of these opposing wall portions has two substantially the same notches that are separated in the longitudinal direction at the intermediate portions of both ends of the liner element 11, and are provided in the lateral direction with the notch of the corresponding wall portion. Are aligned.
One pair of notches is shown at 28,44 and the other pair of notches is shown at 44,45.

Each notch is flanked at the longitudinal ends by the flared portion of the wall in which it is provided, each of the partial flanks moving away from its associated notch. It will be appreciated that when viewed in a direction, it is associated with its longitudinal centerline to converge. This will be understood when considering the flanks 30, 36 as the part associated with the notch 28 and the centerline 35. Parts 32, 38 for the notch 44, parts 34 for the notch 45,
The same applies to the portions 39 and 37 for the notch 39 and the notch 43.

The invertibility of the liner element 11 relative to the base element 10 is illustrated by the fact that the body 12 'extends along one side wall so as to surround the corner 12 "and transverse to the length of the joint. Not only is it useful for left-hand or right-hand fixtures, as shown in Figure 4, but also for common liner elements, even if the liner element is flat, polishing in only one longitudinal direction. When subjected to a force, wear generally occurs at the tip rather than at the tip.
Reorienting the ends of the liner element effectively extends its life. In the case of the right and left elements of the shapes shown in FIGS. 3 and 4, the invertible property is that they are typically very large and very heavy, and at times in the appropriate position of the associated bucket 18. This is particularly effective because it requires an integral eye hole 46 to lift the.

Another form of the invention is shown in FIG. 5A, which is useful when the length of the liner element is limited. It uses only notches 128 and 143,
A pair of notches is achieved in the liner element 111 of FIG. 5A, omitted. As in the case of the embodiment of FIG. 2, the embodiment of FIG. 5A differs from the embodiment of FIG.
7 and 148, which have a longitudinal centerline of 135
It is said that the relationship is symmetrical to. These are integrally provided with rising portions 141 and 142. Furthermore, FIG.
As in the example of FIG.
Symmetrical around 140.

There are four pairs of dovetails. In this case,
The arrangement is slightly different. The array of dovetails is a notch
It is similar in that the flaring surfaces 136, 130 of 128 are substantially the same as the flaring surfaces 36, 30 of the notch 28 of FIG. Also, when viewed in the leftward direction, the additional dovetail or wall portion 132 extends to the left of portion 136, exactly as face 32 is to the left of face 36 in FIG. . However, while portion 38 of FIG. 2 is at the left end, it has been moved to the right end at 138 in FIG. 5A. More specifically, the opposing side walls 147 and 148 are provided with two pairs of longitudinally separated portions divided by notches provided in the side walls 147 and 148, respectively. Each wall of each pair is
It has two angularly associated wall portions. That is, the wall portion 130 adjacent to the notch is in a converging relationship (in the direction away from the notch) with the laterally aligned wall portion 131, and the wall portion 138 away from the notch. Are in open relation to their laterally aligned wall portions 139.

The common point of both configurations is that each notch forms a side surface at the opposite ends in the longitudinal direction by the portions of the opposing wall portions, and each of the portions forming the side surface separates from the related notch. In the direction, it has a converging relation with respect to the center line in the longitudinal direction. Further, each opposing wall away from the cutout has two additional wall sections so as to cooperate with the side-forming wall sections when the body is reversibly attached to the base element 10, 110. is doing.

The notch and the wall portion are configured to have approximately the same length, and the first additional wall portion is separated from the first side wall portion by about two lengths. And the second additional wall portion is also separated from the second side forming wall portion by about two lengths, and the first side forming wall portion and the first additional portion are The second side wall portion and the second additional wall portion are parallel to each other.

The above will be understood by considering B of FIG. B of FIG. 5 corresponds to FIG. 2 and FIG.
FIG. 4A is a schematic plan view showing the corresponding elements of A of FIG. 3A side-by-side, with notches 28 and 128, wall portions 30, 130, wall portions 32, 132 and additional wall portions 36, 136 being aligned. The additional wall portions described above include wall portions 136, 138 in the schematic view of Figure 5A. Wall portion 132 cooperates with wall portion 130 (ie, is parallel),
It is separated by twice the length l. In a similar fashion,
The additional wall portion 138 is associated with the side forming wall portion 136. Therefore, in the case of FIG. 5A, the additional portion is notched 128.
You can see that they are on both sides of.

Further explaining along B of FIG. 5, in the case schematically shown in FIG. 2, the side forming portions are 36 and 30, and the additional portions are 38 and 32. Note that part 38 is part
It is separated by two lengths from 36 and is parallel to section 36. On the other hand, the portion 32 is separated from the portion 30 by two lengths and is parallel to the portion 30.

It will be easier to understand the existing structure and characteristics in both directions by paying attention to the modified example based on the repeating pattern as shown in FIG. For example, the section line 2'-2 'and the section line 2 "shown in FIG.
2 "results in the base and liner combination of FIG. 2. Section line 5'-5 'and section line 5" -5 "cut of FIG. A base and liner combination is obtained, when cutting along section line 6'-6 'and section line 6 "-6", the base and liner combination of Fig. 6 is obtained. There are various combinations of base and liner, such as assemblies with dovetails that can be moved forward and backward, and smaller assemblies where individual mounting (mounting method for continuous mounting) is allowed. It can be appropriately cut into a shape necessary for obtaining a special object.

In the embodiment of FIG. 2, the liner elements 11 are continuously arranged such that the liner elements are in end-to-end contact, such as in a wear liner for a dragline bucket or a lining for a well. It can also allow the sliding movement required for removal if they are continuously removed. This allows the base 10 of FIG. 10 to disengage the liner element 11 by moving the liner element 11 forward a required distance M, while the required placement of the base 10 dovetails its movement. This is because However, for continuous use of the embodiment of FIG. 5, the portion 24 of the liner element 211 of FIGS. 6 and 7 is movable so that it can move relative to the base element 210.
End protrusions such as 9,250 are added. B in FIG. 9 is
Shown is this configuration with end protrusions and the amount M'of travel required to disengage the dovetail and remove the liner element.

[0028]

Three-Point Embodiment First, FIG. 8 of the four-point embodiment shows a repeating pattern for a base element and a liner element, which can be cut at various positions and still. It should be understood that there are available base liner assemblies available. However, there are other ways to cut out the continuous part. Figure 10 shows a rising wall
The first stage is shown in which the 442 is moved longitudinally with respect to the other rising wall 441. This forms an offset J not found in the four-point embodiment.

10 and 11A and B of FIG. 11 will be described after the three-point embodiment has been described in detail.
Referring now to FIG. 12, which illustrates a three-point assembly according to the present invention, reference numeral 310 indicates a base element and reference numeral 311.
Indicates a liner element. In this illustrated embodiment,
The base element 310 has a body 312 that is substantially flat.
312 is relatively elongated so that end wall surfaces 313, 314 and side wall surfaces 315, 316 are formed. One surface 317 (see FIG. 13) of the body 312 is a surface that is normally fixed to the worn portion of the structure 18.

The surface opposite the attached surface 317 is shown only in FIG. 13 and is labeled 319, which is the side opposite the liner element 311. As in FIG. 2, parts of the liner element 311, such as the body, walls, and surfaces, are labeled with the same numbers as the corresponding parts of the base element 310, but with a prime symbol ('). That is, 3
12'-317 ', 319' or 412'-417 ', 419'.

To further describe the base element 310 of FIG. 12, the side wall surface 315 of the body is integrally provided with laterally extending flanges 322, 323 which are separated by a recess 324 which is relatively long in the longitudinal direction. Has been done. Flange 32
The tips of 2, 323 are shaped so as to form a converging / opening surface.

Another flange 320 extends from the other side wall surface of the body and its tip is also shaped to form a converging / opening surface. Flange 320 is laterally aligned with recess 324 such that flange 320 is the longitudinal middle of recess 324 and flanges 322, 323 are adjacent the ends. The important difference between FIG. 12 and FIG. 2 is the side wall surface.
There is only one flange extending laterally from 316. In other words, there is no portion corresponding to the flange 21. Each of the flanges has a converging / opening outer surface.

An example of a dovetail surface is the outer wall surface 326 of the flange portion 322 of the base element 310 or 410 (FIGS. 14 and 15).
See the upper right part of the). 14 and 15, the recess 424 is significantly shorter than the recess 324 and the flange 42
It differs from that of FIG. 12 in that 0 is shorter than the flange 320.

The embodiment of FIGS. 14 and 15 has a base element 41 of both a similar type and a different type to the conventional configuration of FIG.
A liner element 411 can be mounted on the 0. In that case, the notch F is aligned with the dovetail joint E and the liner element B
Is moved into engagement with the fixed base A, then
It is moved backwards, as indicated by arrow C. Normal matter flows from right to left in FIG.

Notches 428, 443 are used to attach liner element 411 to base element 410, exactly as notches 28, 43 used in FIG. The description of FIGS. 14 and 15 also applies to FIG. 12, but certain reference signs have been omitted from FIG. 12 for clarity. Notch 42
The reference numerals 8 and 443 are provided on the rising side wall portions 441 and 442, respectively (see FIG. 15). These substantially correspond to the notches F of the rising wall portion G of FIG. 1 showing the conventional configuration. Placing the liner element 411 such that the notch 428 is aligned with the flange 422 and the notch 443 is aligned with the flange 420 allows the liner element 411 to be attached to the base element 410. After this, the liner element 411
Are slid rearward (to the left in FIG. 15) along the centerline 435 and the dovetails engage. The word "rear" is also used for the normal flow direction of a substance, which is indicated by an arrow 429 in FIG. As a result, the liner element 411 and the base element 41
The seated engagement between the dovetails of 0 becomes stronger. In this engagement, dovetail surface 430 abuts dovetail surface 426 of base element 410.
Further, the dovetail surface 432 contacts the dovetail surface 433 of the flange,
434 contacts the dovetail surface 451 of the flange 420.

The embodiment of FIGS. 14 and 15 can also be used to attach the liner element 411 to the base element 410 without the use of a notch as in the conventional configuration, as in the following modifications. .

[0037]

[Variable mounting method] This modified mounting method for mounting the liner element 411 to the fixed base element 410 is as shown in FIG.
~ Are shown in order in Figure 18. In FIG. 16, for example, the longitudinal centerline 435a of the liner element 411 is the base element 4
To make a small angle to the center line 435 of 10,
It is shown that the liner element 411 is oriented.

Then, as shown in FIG. 17, the liner element
411 is in the direction of arrow 429, that is, in the normal material flow direction,
Moved backwards on the base element 410. After this, centerline 4
Liner element 411 has been rotated so that 35a and 435 are aligned (clockwise in FIG. 17) and along line 435a and 435 of FIG.
Further movement of the liner element 411 to the left as shown at 8 results in seated engagement of the dovetail surface.

The domed surface of the base element 410 is clearly shown at the left end of FIG. Here, the reference numeral 433 indicates the face of the flange 423 (this flange 423 is the same as the flange 323 of FIG. 12), and the flange 422 having the surface 426 coincides with the flange 322. Opposite side wall 416 to flange 420
Has a dovetail surface 451 at its tip.

These dovetail surfaces cooperate with the opposing surfaces of the liner element 411. At the rising wall portion 441, FIG.
Referring to the right side of, surface 430 engages surface 426, surface 432 engages surface 433 and surface 434 engages surface 451. First wall 4
47 is a pair of dovetail surfaces 430, 4 which are longitudinally spaced from each other.
32, and these dovetail surfaces are inclined at a positive angle with respect to the centerline 435 (see FIG. 15). The opposite second wall 448 has one dovetail surface 434 that is inclined at a negative angle with respect to the centerline 435, which is the first wall 4
It is located midway between the adjacent ends of the 47 dovetail surfaces 430, 432.

In FIG. 12, the longer recess 324 (see FIG.
4 for short recesses 424) and longer flanges 320
By providing (for flange 420) and
A dovetail 351 having a length approximately equal to the sum of dovetails 326, 333 can be formed. On the other hand, the dovetail surface 451 of FIG.
It is almost the same length as 6 and 433 respectively. Equalizing one dovetail with a pair of dovetails (FIG. 12) would provide a slightly greater holding force.

[0042]

[Possibility of reversal] In order to be able to mount the liner elements 311, 411 with either end placed forward, the facing walls 447, 448 have been rotated 180 degrees. In some cases, they have the same shape.

Three additional dovetail surfaces are provided so that engagement of the dovetail surfaces is obtained when the liner elements 311 and 411 are inverted. For example, dovetail surface 436 (see FIG. 15) corresponds to dovetail surface 434, and paired dovetail surfaces 439,437 correspond to surfaces 430,432.

Faces 430 and 432 and faces corresponding to when using reverse
Reference numerals 437 and 439 denote a substantially flat plate-shaped main body 412 ′ that constitutes the liner element 411 (the same applies to the liner element 311 in this respect).
Note that it is adjacent to the end of the (see FIG. 15). Also, regardless of which end is placed first, the pair of dovetail surfaces 430, 432 or 437, 439 have notches 428, 4
It has one dovetail located just in front of 43. Also, the notch 443 is just behind the dovetail surface 434 when one front wall is placed forward, and when the element 411 is rotated 180 degrees, the single dovetail surface 436 is notched. Just in front of 428.

[0045]

Mounting the Mold Board It has been found that the present invention can be effectively applied to liner elements in civil engineering such as the mold board 518 of FIGS.
In such a case, it is most desirable to provide a sharp cutting bottom edge, which, as shown in FIG.
This is accomplished by placing a plurality of liner elements 511 in juxtaposition with each other. Further, the liner element 511 has a side wall surface, an end wall surface, an upper surface, and a lower surface, although the reference numeral is omitted for simplicity.

For this purpose, the mold board 518 is provided with a plurality of base elements 510 in a juxtaposed relationship in the horizontal direction. In addition, each base element 510 has a substantially flat body 512.
21 (see FIG. 21), the body 512 is elongated to form end wall surfaces, sidewall surfaces, top and bottom surfaces, similar to the previous embodiment of the invention. The side wall surface 515 of the base element (located upward in FIG. 21) is substantially the same as the shape of the previous embodiment, i.e. the convergence / division by the notch 524.
It has open faces 526 and 533 (see FIGS. 20 and 21). However, the other side wall surface 516 is not textured and has a flat wall surface that simply opposes the internal shoulder 552 of the liner element 511. Another dovetail engagement of the liner element is provided by the mold board 518, at 553 shown in the lower portion of FIG.

The method of joining the liner element 511 to the molded board 518 to which the base element is attached is described in FIG.
In particular, it will be readily understood from the perspective view of the liner element 529 where the mounting procedure is shown along a line 529 parallel to the longitudinal centerline 535.

First, as shown in the lower left part of FIG. 19, the mold board has an inclined bottom edge 554 parallel to the ground, and this edge 554 is attached to the cutting edge by bolts. But good. This edge 554 is effectively
It provides a dovetail surface that mates with a linear dovetail surface 548 provided on the liner element 511 (see lower right portion of Figure 21). In other words, the faceted surface 548 is not a convergent / open faced surface, unlike other embodiments of the invention. However, the liner element has rising wall portions 541, 542. The wall portion 541 has a wall surface 547 provided with converging / opening surfaces 530, 532 divided by a notch 528, as in the previous embodiment. The walls 548, 554 extend parallel to the longitudinal centerline of the liner element 511.

The longitudinal centerline is also indicative of the direction of movement of the liner element when it is installed. This is indicated by a portion of arrow 529 in FIG. Depending on the designer's purpose, it may be a longer liner element in the direction of movement for installation or in the lateral direction thereof.

For attachment, the flange-like rising wall portion 542 at the bottom of the liner element 511 has a notch 528 and a face 533.
Is hooked to the underside of the bottom wall 544 of the mold board, aligned with. Then face 5 in notch 528
The liner element 511 is pivoted so that the 33 is positioned and then the liner element 511 is slid to the right (FIG. 2).
1). When a plurality of liner elements 511 are assembled in a side-by-side relationship, the liner elements function to secure one another with the outermost liner elements secured in place by bolts or welding. Since the dovetail is only on one rising wall, the angle of the dovetail does not have to be the same as the converging / opening described above, alleviating the need for precise tolerances.

In carrying out the present invention, various dovetail joint configurations are possible based on the basic idea of the present invention. Focusing on the liner elements, in particular the rising wall portions 41, 42 of FIG. 8 or the rising wall portions 441, 442 of FIG. 10, the idea is that one wall portion, a pair of spaced apart dovetail surfaces 3
This includes providing 0, 32 (FIG. 8) or dovetail surfaces 430, 432 (FIG. 10). These are effectively aligned at positive angles to the longitudinal centerlines 35, 435, respectively. Opposite the longitudinal centerline, the second wall portion 42, 442 is provided with a surface 37, 434, respectively, which surface faces the dovetail surface of the first wall portion 41, 441. The surfaces 37,434 are located in the middle of the spaced surfaces 30,32 or 430,432.

As described with respect to the mounting of the mold board, this opposing surface may be an inclined surface or a straight dovetail surface 54.
It can be 8. Opposing surface 434 is centerline 435 of FIG.
If arranged at a negative angle with respect to, that surface would provide the third surface of the three-point embodiment (see FIG. 15).

By separating the sides of the surface 434 by the surfaces 437 and 439 arranged at a positive angle with respect to the center line 435,
Inversion is possible by providing a corresponding negative surface 436 between 30 and surface 432.

This three-point repeating shape is superposed,
That is, it can be adjusted to obtain a continuous mounting as shown in FIGS. 9A and 9B. This is done by elongating the base element as shown at 610 in FIG.
It is achieved by adding 9,650,666,667.
The resulting base element is shown in FIG. 11B and has a three point structure.

Cutting the repeating pattern to form the base element 710 (see left part of FIG. 10), 4
It allows the formation of dot-type embodiments. This liner element 711
Is substantially identical to the liner element 211 of FIG. 6 shown in FIG. However, the notches in the opposing wall portions are not aligned and are offset or offset. In FIG. 6, the offset is zero, whereas in FIG. 11A, there is an offset of 1/3 of the predetermined length. This length is the distance between two similar points, that is, the distance between the center points of two adjacent notches or the distance between the vertices of adjacent dovetails. This will be understood from the letter J given in the left part of FIG. It may also be extended up to 1/2 of the predetermined length.

This offset J is changed according to the required situation and function. This repeating pattern is cut at the appropriate locations to provide a base / liner element combination that can be overlapped and inverted and can be contacted at three, four, or more points. You can

[Brief description of drawings]

FIG. 1 is a perspective view showing a conventional configuration according to US Pat. No. 4,716,666.

FIG. 2 is an exploded perspective view showing elements of a four-point type embodiment of the present invention.

FIG. 3 is a plan view of the assembly of FIG.

4 is a partial side view of the assembly of the present invention applied to the corners of a bucket, taken along line 4-4 of FIG.

FIG. 5A is an exploded perspective view showing the improved four-point configuration of the present invention, showing the assembled base element in dotted lines,
2B is a schematic illustration showing the corresponding dovetail portions of the elements shown in FIG. 2 and FIG. 5A in relation to each other.

FIG. 6 is a plan view of the modified form shown in FIG. 5A.

7 is a cross-sectional view taken along line 7-7 of FIG.

FIG. 8 is a schematic plan view of a series of liner assemblies to illustrate another four point configuration.

9 is a schematic plan view of the configuration of FIG. 2 showing the disassembling method, and B is a schematic plan view of the configuration of FIG. 6 showing the disassembling method.

FIG. 10 is a view similar to FIG. 8, but with the upper and lower sides offset by about 1/3 of a predetermined length, showing a three-point configuration and method according to the present invention.

11A is a plan view showing a base element formed by cutting along line 11A and line 11A in FIG. 10, and FIG. 11B is cut along line 11B and line 11B in FIG. It is a top view which shows the base element formed by this.

FIG. 12 is a plan view showing a three-point configuration according to the present invention.

13 is an end view of the assembly of FIG. 12 or FIG.

FIG. 14 is a plan view showing a modified example of the three-point configuration according to the present invention.

FIG. 15 is an exploded plan view of a three-point assembly according to the present invention.

16 is a plan view showing a first stage of the assembling procedure of the assembly of FIG. 14. FIG.

17 is a plan view showing a second stage of the assembling procedure of the assembly shown in FIG. 14; FIG.

18 is a plan view showing a third stage of the assembling procedure of the assembly shown in FIG. 14; FIG.

FIG. 19 is a side view showing still another modification of the three-point type structure according to the present invention, which is used for a cutting edge portion of a mold board.

20 is a partial front view showing the assembly of FIG. 19. FIG.

21 is an exploded perspective view showing a method of assembling the assembly shown in FIGS. 19 and 20. FIG.

[Explanation of symbols]

 10,110,310,410,510 Base element 11,111,311,411,511 Liner element 12 Body 13,14 End wall 15,16 Side wall 20,21,23 Flange 24,25,28 Notch 30,31 , 32, 33, 34, 36, 37, 38 39 Face 35, 40 Center line 41, 42 Rise wall

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Patent Laid-Open No. 63-93935 (JP, A) Actually published 63-101179 (JP, U)

Claims (10)

[Claims] 1. A replaceable liner element (311, 411) mounted on a worn portion (18) of a structure that may come into contact with abradable abrasive material, the end wall surfaces (313 ', 413'). , 314 ', 414'), side wall surfaces (315 ', 415', 316 ', 416'), upper and lower surfaces (317 ', 417', 319 ', 419'), and one of the upper and lower surfaces. (319 ', 419')
Is provided so as to contact with the wear substance, and has a substantially rectangular plate-shaped single body (312 ', 412'), and the other of the upper surface and the lower surface (317 ', 417') is the longitudinal center. By being moved substantially along the lines (335, 435), they are arranged so as to face the above-mentioned worn portions, and both side wall surfaces (315 ', 415', 3) are arranged.
16 ', 416') adjacent to the other surface (31
7 ', 417') have opposite walls (447, 44 ').
8) laterally spaced integral parts (441,
442) is provided, and the first wall portion (447) of the opposing wall portions is separated from each other in a pair of longitudinal directions inclined at a positive angle with respect to the center line (435). In the liner element, the second wall (448) of the opposing walls is inclined at a negative angle with respect to the centerline in the liner element having an inclined dovetail surface (430, 432). And a dovetail surface (430,
432), a dovetail surface (4
34) having a liner element. 2. The first wall portion (447) is inclined at a negative angle with respect to the centerline and is disposed between the pair of spaced dovetail surfaces (430, 432). Having an additional intermediate dovetail surface (436), the second wall (448) is inclined at a positive angle with respect to the centerline and is located on either side of the intermediate dovetail surface (434). 2. An additional dovetail surface (437,439) provided, by which it can be mounted reversibly.
The listed liner element. 3. The opposing walls (447, 448) have ends (31) of the body (312 ', 412').
3 ', 314', 413 ', 414') is provided with a pair of substantially identical notches (428, 443) in the middle, each notch being a part of the opposing wall surface. By a certain side forming surface (430, 436, 434, 439),
Side surfaces are formed at both ends in the longitudinal direction, and each of the side surface forming surfaces (430, 436, 434, 439) is aligned with the longitudinal centerline (435) in a direction away from its associated notch. An additional partial dovetail surface (432, 322) in converging relation to each other such that each of the opposing walls cooperates with the side forming surface when the body is reversibly attached to the worn portion. 437), and the additional partial dovetail surfaces (432, 43).
7) is characterized in that it is separated from the first side surface forming surface (430, 439) of the partial side surface molding surfaces inclined in the same direction as the partial dovetail surface (432, 437). The liner element of claim 1. 4. A pair of longitudinally spaced dovetail surfaces (43) of said first wall portion securable to said wear portion (18,518) of the structure which may come into contact with wear material.
0,432) engaging the first dovetail surface (326,33)
3,426,433) and a second dovetail surface (351,4) that engages the intermediate dovetail surface (434) of the second wall.
51) Liner element according to claim 1, characterized in that it is used with a base element (310, 410) having 5. The body has a front end (313 ', 313', which is first placed in the path of movement of the abrasive material relative to the body).
413 ') and the one in front of the pair of dovetails (43')
0) a notch (428) provided in the first wall portion (447) adjacent to the rear end portion thereof and the intermediate dovetail surface (43).
4) a liner element according to claim 1, characterized in that it has a notch (443) provided in the second wall (448) adjacent to the rear of (4). 6. A base element mounted on a surface subject to wear when a liner element is mounted to a base element by moving the liner element generally along a longitudinal centerline of the liner element and the base element; A method of making a dovetail between a liner element contactable with a wear material having a liner element and the base to form two laterally spaced opposing walls. Forming a repeating pattern of flanks on each of a pair of opposing walls in each of the elements, one set of said opposing walls being inclined at a positive angle to said centerline and both Providing at least two longitudinally spaced dovetail portions divided by laterally extending notches in opposing walls of the element of FIG. By cutting in a transverse plane that is longitudinally spaced at least beyond the ends of
Defining the base element and the liner element,
A method for manufacturing a dovetail joint, which comprises: 7. In the other set of the opposing wall portions,
At least one dovetail portion is provided intermediate the adjacent ends of the two longitudinally spaced dovetail portions, the notches in both sets of said opposing walls being substantially transverse. 7. Aligned with each other
The method of manufacturing the spliced part described. 8. In the other set of the opposing wall portions,
There is provided at least one dovetail portion located intermediate the adjacent ends of the two longitudinally spaced dovetail portions, the corresponding points in the two sets being between corresponding points in the set. 1 of the predetermined distance which is the length in the longitudinal direction of
7. The method for manufacturing a dovetail joint according to claim 6, wherein the dovetail joint is offset up to / 2 in the longitudinal direction. 9. A replaceable liner element (11, 111, 711) mounted on a worn portion (18) of a structure that may come into contact with abradable wear material,
End wall surface (13 ', 14'), side wall surface (15 ', 1)
6 '), a substantially rectangular plate-shaped single body (7', 19 ') having an upper surface and a lower surface (17', 19 '), one of the upper surface and the lower surface being in contact with the abrasion substance (6'). 12 ')
And the other (17 ′) of the upper surface and the lower surface is
By being moved along the longitudinal centerline (35, 135), it is arranged so as to be opposed to the worn portion and adjacent to both side wall surfaces (15 ', 16'). The other of the upper and lower surfaces (17 ') has laterally spaced integral raised portions (41, 42, 14) having opposing walls (47, 48, 147, 148).
1, 142) are provided, and the opposing wall portions are
A pair of substantially identical notches (28,43,28) spaced equidistant from the longitudinal centerlines (35,135) and provided in the opposed walls between the end walls of the body. 12
8,143) and each notch (28,43,1)
28, 143) is the portion of the opposing wall (30, 3).
1, 36, 37, 130, 131, 136, 137) form side faces at both longitudinal ends thereof, and each of the side face forming portions has a cutout (28, 43,
128, 143) in a direction away from the notch (28, 43, 128, 143) and having a converging relationship with the longitudinal centerline (35, 135). (47, 48, 147, 14
8), when the body is reversibly attached to the worn portion, the side surface forming portion (30, 31, 36, 3)
7, 130, 131, 136, 137) and two additional longitudinally spaced parts (32, 34, 3).
8, 39, 132, 134, 138, 139), and the first additional part (3
2, 34, 132, 134) is the first side face forming portion (30, 31, 130, 13) of the side face forming portions.
1), the second additional part (38, 39, 138, 139) of the additional parts is separated from the second side forming part (36, 37, 13) of the side forming parts.
6, 137), the first side surface forming portion (30, 31, 130, 131) and the first additional portion (32, 34, 132, 134) are inclined in substantially the same direction, The second side surface forming portion (36, 37, 13
6,137) and the second additional portion (38,39,1)
38, 139) are inclined in substantially the same direction, and each of the portions of the opposed wall portions is inclined in the lateral direction in the direction of one of the upper surface and the lower surface and the adjacent side wall surface thereof. Liner element characterized by. 10. A replaceable liner element (511) attached to a worn portion (518) of a structure that may come into contact with abradable wear material, the end wall surface, sidewall surface, top surface and bottom surface. A single plate-shaped body having one of said upper surface and lower surface adapted to contact said wear material, the other of said upper surface and lower surface being at its longitudinal centerline (535). By being moved substantially along, it is arranged so as to face the worn portion, and on the other surface adjacent to both side wall surfaces,
A laterally spaced integral raised portion (541, 542) having opposed walls (547, 548) is provided, the first wall (547) of said opposed walls.
Is a pair of longitudinally spaced dovetail surfaces (530, 53) inclined at a positive angle with respect to the centerline (535).
2) in the liner element, the second wall (548) of the opposing wall is substantially parallel to the centerline and extends across the entire length of the second wall. A liner element comprising (548).