Cog unit for earthmover

FIELD: construction.

SUBSTANCE: cog unit of earthmover bucket comprises cog with seat, which is open at the back and is a female part, besides specified cog has hole for fitting of fixing stud, adapter, having ledge, which is a male part that matches shape of specified seat, besides mentioned ledge is crossed with matching site for fixing stud, fixing stud inserted into specified hole of cog and into specified matching site in adapter and serving for cog fixation to adapter. At least one of specified opposite surfaces of ledge has lowered or deepened area arranged around matching site for fixing stud. At least the wall of seat that is inverted towards specified surface of ledge has relief part additionally to specified lowered or deepened area, having shape of boss that gradually increases in direction of open part of seat. Specified hole in seat walls and specified matching site in ledge have according flat back surfaces, which are matched to each other. Fixing stud has flat back surface, which simultaneously lies onto specified back surfaces of hole and matching site.

EFFECT: simplified design of cog unit for manufacturing, lower costs, avoidance of cog disconnection from adapter under severe operation conditions.

32 cl, 14 dwg

 

[0001] the Present invention relates to a node of the tooth for machines for earthworks, such as excavators.

[0002] In accordance with the introductory part of paragraph 1 of the claims of known nodes teeth for machines for excavation, containing tooth, adapter and pin for attaching the tooth to the adapter.

[0003] the Tooth has a socket open at the back, which is the covering part and having a hole for mounting the locking finger carried out in two opposite walls of the said slot.

[0004] the Adapter has a body of such form that it could be attached, for example welded or bolted to the bucket of the machine, and a protrusion extending from the said body and which is covered in part so that its shape corresponds to the socket of the tooth. The ledge crossed the landing place for the locking finger, and mentioned the seat is held between two opposite surfaces of the above-mentioned projection and aligned with the hole in the tooth.

[0005] the Manufacturing site of the tooth in the form of two separable parts, tooth and adapter has the advantage that it is possible to replace only the tooth when it is worn, while the adapter remains permanently attached to the bucket of the machine. The fastening system of the tooth to the adapter, made for example in the form of a finger, should therefore allow to quickly and easily replace the tooth./p>

[0006] However, this need is in contradiction with the need to make the connection between the tooth and the adapter is the most durable because of the significant pressures being imposed on the tooth.

[0007] in fact, in some of the famous sites of the tooth in order to make the operation of the replacement tooth is easy and fast, there is good interaction between the locking finger and its landing place, resulting in intensive use of the pin can fall out with seats, this leading to the separation of the two parts of the node.

[0008] other known solutions implementation in the heart of the finger has a special locking device, such as a flexible type that are suitable for interaction with the protrusion of the adapter in order to rigidly hold the locking pin in its position. In addition, it makes the system node teeth are more difficult to manufacture and therefore more expensive, such solutions do not fully resolve the problem of avoiding disconnection of the tooth from the adapter in severe operating conditions. In fact, all attempts to solve the problem mainly focus on the connection between the locking finger, the tooth and the adapter, and therefore, reduced to the restricted area of the site of the tooth.

[0009] Some of the burden faced by the tooth during use, in fact, such h what about if he is opposed to basically only one locking finger, they can lead to failure and, therefore, removing the tooth from the adapter.

[0010] there is Therefore a need of combining requirements to produce the maximum tooth combined with the adapter, in order to effectively withstand even the heaviest loads, which is exposed to the site of the tooth, and requirements facilitate replacement of a tooth, for example, by the easy and quick removal of the locking finger.

[0011] the present invention therefore consists in carrying out the above need by addressing weaknesses nodes of the teeth, known in this technical field.

[0012] This objective is achieved by node tooth under paragraph 1 of the claims.

[0013] the Characteristics and advantages of the present invention will be more apparent from the following description of some of the best options for its implementation with reference to the accompanying illustrative and non-restrictive drawings, on which:

[0014] figure 1 shows a perspective view of the site of the tooth in accordance with the present invention;

[0015] figure 2 shows a section along the vertical axis of the node tooth;

[0016] figure 3 shows an enlarged axial section of the Central and front part of the site of the tooth;

[0017] in figa shows the cross-section, similar to the previous one, but with the locking finger in a position prior to installation;

[0018] figure 4 shows a lane is promising views only of the tooth;

[0019] figure 5 shows an axial section of a tooth.

[0020] figure 6 shows the tooth from the rear edge;and

[0021] figure 7 shows a perspective top view of the adapter;

[0022] in Fig shows a perspective bottom view of the adapter;

[0023] figure 9 shows a side view of the adapter;

[0024] figure 10 shows a perspective view of the locking finger;

[0025] figure 11 shows the vertical projection of the finger;

[0026] on Fig shows a view in plan of the finger in position for storage;

[0027] in Fig. 13 shows a view in plan of the finger in position for use.

[0028] With reference to the drawings, the node 20 of the tooth in accordance with the present invention contains the tooth 11, the adapter 41 and the locking pin 61.

[0029] the Site of the tooth mainly runs along the longitudinal axis X, which can be defined in the rear part and the front part of the site of the tooth. The X-axis coincides with the direction of the site from the tooth to the adapter.

[0030] the Tooth 11 is the actual instrument for digging, while the adapter 41 is an element for connection node of the tooth to the bucket digging machines, such as excavator, in this case represented by the blade 10. When the tooth 11 replaced after wear, the adapter 41 remains attached to the bucket. The locking pin 61 is rigidly secures the tooth 11 to the adapter 41.

[0031] the Tooth 11 has a front working portion 11' and the rear portion 11 d is I connection adapter 41. The connection between the tooth 11 and the adapter 41 is of type covered-comprising compounds, and the rear part 11 of the tooth is covering part of the connection. More specifically, the aforementioned rear part 11 contains the socket 12, open at the back.

[0032] the Adapter 41 has a front portion 42, hereinafter referred to as a protrusion, and the posterior portion 50, called the body of the adapter. The protrusion 42 is covered portion connecting with the tooth and has a shape corresponding to the socket 12 to install it and geometrically corresponding to it.

[0033] the Protrusion 42 departs from the body 50, which has, for example, V-shape for attaching, for example, by welding or by bolts, to the blade 10.

[0034] In accordance with the General embodiment, the tooth 11 has an opening 16 for planting the latch finger 61, which is made in two opposite walls 13, 14, bounding the socket 12. Accordingly, the protrusion 42 intersects the seat 43 to the latch finger 61, and mentioned the seat is held between two opposing surfaces 47, 48 of the above-mentioned projection and aligned with the hole 16 in the tooth 11.

[0035] In accordance with the invention, at least one of the said opposite surfaces 47, 48 of the ledge, preferably both, is reduced or depth region 49, performed around the seats 43 graphicsimage finger 61. Accordingly, each wall of the socket 12, addressed to each surface of the protrusion 10, having a lower region 49 has an inside embossed portion 18 in addition to the mentioned low or deep region 49. After entering the protrusion 42 in the socket 12 of the relief portion 18 coincides with the reduced area 49, matching her form.

[0036] In accordance with one best option for the walls 13, 14 of the socket 12, the cross bore 16, and the surfaces 47, 48 of the protrusion 42 with a mounting seat 43 is inclined relative to the longitudinal axis X and converge in front.

[0037] In accordance with one best option for the hole 16 in the socket and mounting hole 43 in the ledge pass around a transverse axis Y, perpendicular to the aforementioned longitudinal axis X. Mainly in relation to the site of the tooth in the initial position shown in figures 1 and 2, the wall 13 and the surface 47 facing up, while the wall 14 and the surface 48 facing in the opposite direction. In other words, if we consider the longitudinal axis X passing horizontally, transverse Y axis is essentially vertical. If there are multiple nodes of teeth located next to each other at a short distance, this design allows you to conveniently install and remove your finger from the top, i.e. neighboring nodes of the teeth do not interfere with this operation.

[0038] Mainly in amanuta reduced or recessed area 49 is determined by the part of the plane, perpendicular mentioned transverse axis Y. Accordingly, the said relief portion 18 that extends from each of the inclined walls 13, 14 of the socket 12, is accomplished by thickening of the mentioned walls around the holes 16 for fixing the finger 61, and the above-mentioned thickening gradually increases towards the open part of the slot so as to define a plane perpendicular to said y-axis.

[0039] In accordance with one embodiment the protrusion 42 and the socket 12 have respective opposite side surfaces and walls 54, 15 essentially vertical. Primarily, each of these side surfaces 54 of the protrusion 12 has along its entire length of the guide groove 55, parallel to the longitudinal axis X. Accordingly, each of these side walls 15 of the socket 12 has an inside guide groove 22 suitable for receiving the aforementioned guide groove 55 of the ledge.

[0040] In accordance with another aspect of the invention, the socket 12 ends in front of a flat bottom 20 defining a front support ledge 42. The latter is, in essence, a flat front end face 53 lying on said flat bottom 20 of the socket. In other words, the socket 12 and the protrusion 42 take the form of a parallelepiped with a trapezoidal cross-section of a truncated pyramid.

[0041] Mainly mentioned flat bottom 20 overall reproductive whom and surrounded by a peripheral notch or groove 21, useful for any debris or residues, e.g. by pressing, casting or coating of the tooth 11. Mentioned groove 21 provides that the adapter 42 is always on the thrust plane 20 and also in the presence of debris, residue or dirt in the socket 12. Therefore, the hole 16 is always aligned with a mounting seat 43. Hole 16 and the seat 43 can thus be manufactured with high precision without the need to leave a gap to compensate for any mismatch or gap, which would negatively impact on the efficiency of fixation of the tooth on the adapter.

[0042] According to another aspect of the invention, in addition to the lower regions 49 of the protrusion and the corresponding relief areas 18 of the socket, the tooth 11 and the adapter 41 may also have a connecting portion shaped to enter into each other at the connection of the tooth and adapter. In particular, this interpenetration mainly takes place on the level surface of the abutment tooth to the adapter along the longitudinal axis X.

[0043] for Example, the body 50 of the adapter has a front, in essence, a flat peripheral edge 51, which surrounds the protrusion 42 and defines a shoulder or stop for the tooth 11. Mostly, at least one side of the aforementioned peripheral edge, preferably on two opposite sides, has a gap 52, to the second inserted additional prong 19, which extends at least from one of the walls bounding the slot 12. In other words, the junction line of the tooth to the adapter is a broken line.

[0044] According to another aspect of the invention, the hole 16 in the socket 12 and the seat 43 in the ledge 42 have respective rear surfaces 16A, 43A, which, in fact, flat. Similarly, the locking pin 61 is, in essence, a flat rear surface 62 lying on said rear surfaces of the holes and seats. In other words, the connection between the rear surface 62 of the locking finger, the tooth 11 and the adapter 42 is a connection between flat surfaces.

[0045] More specifically, the locking pin 61 has a rear portion 64 defining mentioned back surface 62, the front part 65, which defines the front surface 63, and the intermediate portion 66 made of an elastic material. Mentioned intermediate portion 66 is suitable for mounting the latch finger 61 on the seat in the adapter by pressing. In other words, the cross section of seat 43 in the protrusion 42 is lower than the cross-section of the Central portion 67 of the finger 61, intended for planting on said seat. The finger 61 may be mounted on the seat 43 only by clicking on an intermediate portion 66, which provides in order to move the front part 65 and the rear part 64 closer to each other.

[0046] Mainly intermediate portion 66 of the latch finger 61 is made of an elastomeric material such as rubber. Front and back of the finger can be made for example of steel.

[0047] In one embodiment, the hole 16 and the seat 43 have respective front surfaces 17, 44, which are parallel to the transverse axis Y. Mainly the front surface 44 of seat is rear relative to the front surface 17 of the hole 16 so as to define with it a ledge 45 (top) and the notch 46 (below).

[0048] Relative to the transverse axis Y, which, in fact, coincides with the main axis along which passes the finger 61, the latter has an end portion 68, respectively communicating with the said ledge 45 and with the said notch 46 so as to limit axial displacement of the finger 61 in seat 43. Mostly mentioned end portion 68 are ahead for the Central portion 67 so as to define with it a corresponding ledges 69.

[0049] According to one best option for the implementation of the rear part 64 of the clamping finger 61 has a rectangular cross-section, while the front part 65 has an essentially semicircular cross section. Moreover, each end portion 68 terminates in a chamfer 70, serving for easy insertion of the pin 61 in p the sporting place 43. In addition, it should be noted that the elastic intermediate part 66 has a longitudinal extension, which is on the Y-axis is less than the adjacent 65 front and rear 64 parts, which serves for protection when installing your finger in the slot 43 or remove your finger from the seat 43 by means of a tool acting on the end portion 68.

[0050] According to one best option for the implementation of the walls 13, 14 slot traversed by the hole 16 under the finger 61 are at the level of the mentioned holes 16 a thickness at least equal to the increase in the height mentioned end portions 68 of the latch finger 61. Moreover, at least the upper wall 13 of the mentioned opening 16 defines with the underlying ledge 45 seat aimed for pre-setting the latch finger 61 in hole 16 of the slot and in the slot 43 in the adapter. In other words, the cross section of the holes 16 is equal to or slightly larger cross-section end portions 68 of the finger 61, so that the end of the finger may be directionally installed in the hole 16 and can lie on it, i.e. without operator assistance, as shown in figa. This aimed preset finger allows the operator to set the finger in the slot 43 easy (and your finger is almost fully aligned with the landing place) and safe (to hold the finger in demand is m position do not need to use your hands), for example with the help of a hammer.

[0051] the Above-described construction site of the tooth has several advantages.

[0052] first, what is provided reduced or depth of field of the projection and the corresponding relief region in the nest, in addition to side rails of the grooves allows the use of all sides of the lug and slot connection with a significant increase in strength. In particular, the connection between the raised regions and lowered regions involves protrusion in the seat for the locking finger, which is close to the connection with the body 50, where its thickness is greater. Even in the case of a large reduction of lateral connections, for example, due to wear of the guide grooves, the connection between the embossed areas and low areas will ensure a constant high tensile strength under mechanical loads being imposed on the tooth.

[0053] the Effect of interpenetration of the tooth and adapter and therefore more durable connection is further enhanced by the connection between the gaps in the body of the adapter and an extra prong protruding from a tooth.

[0054] the Presence of low areas and relief areas in the nest has the further effect of increasing the supporting surface of the clamping finger on the rear surface 16A of the hole 16. This increase support surface ru is et, respectively, to increase the resistance to release of the finger from the adapter and to avoid possible damage due to excessive pressure on the part of the tooth in contact with the finger.

[0055] the Presence of flat surfaces of contact between the retainer finger hole and a landing place in the ledge allows us to provide a wide bearing surface for the fingers on the tooth and the adapter, which increases the efficiency of fixation, preventing rotation of the finger due to, for example, vibrations, to which he is exposed. Such unwanted rotation may actually lead to a gradual release of the finger from the seats because of the presence of the finger compressible part.

[0056] moreover, this configuration of the finger allows you to provide a single position in the hole with the seat and thus always accurate engagement of the front ledge of the finger in the recess of the adapter.

[0057] in Addition, it should be noted that the locking pin shall be of such dimensions that its elastic intermediate part shrank not only when installed in the seat, but remained compressed after installation. This compression, coupled with marked front benches, avoids the risk of an accidental release of the finger, for example, due to the impact of objects or debris during operation of the machine.

[0058] As mentioned above, the locking pin and the hole in the nest are of such size, so you can install your finger in the hole in its front part, in the combined is ulozhenie boarding place in the ledge and without the need for manual support.

[0059] This ease of Assembly of the tooth is also provided by the presence of a plane interface at the bottom of the socket of the tooth and its surrounding groove. In fact, as already mentioned, such a plane and such peripheral groove always provide the same positioning between the tooth and the adapter, and therefore permanent and complete agreement between the hole in the socket and the landing place in the ledge.

[0060] In conclusion, it should be noted that the locking connection type between the tooth and the adapter at the level of the outer contact surfaces makes the site of the tooth is very compact and smooth, as if these two elements were one object. It also allows you to ensure no interference with soil or other materials during loading and emptying of the bucket.

[0061] a person skilled in the art will understand that the site of the tooth according to the present invention can be some changes and adjustments based on specific or random, but all such changes fall within the scope of protection of the present invention defined in the following claims.

1. The site of the tooth bucket machines for excavation, having a longitudinal axis that passes in front and rear, and containing: a tooth from the socket, open back, which is the covering part, and the aforementioned tooth has a hole for the locking of the finger in two opposite walls of the said slot, an adapter having a protrusion, which is covered in detail, which shape corresponds to said socket and the said ledge crossed the landing place for the locking finger and the said seat is held between two opposite surfaces of the above-mentioned ledge and combined with the said hole in the tooth, and the locking pin mounted in said hole in the tooth and in the above-mentioned seat in the adapter and serves for the attachment of the tooth to the adapter, and at least one of the mentioned opposite surfaces of the protrusion is reduced or depth region, performed around the seat for the locking finger, and as least one wall of the slot, which faces to the surface of the protrusion has a relief portion in addition to the mentioned low or deep region having the form of a thickening gradually increasing in the direction of the open part of the slot, and the said hole in the wall socket and the said seat in the ledge have respective flat back surface, combined one with another, and the locking finger has a flat rear surface, while lying on said rear surfaces of the holes and seats.

2. The site of the tooth according to claim 1, otlichuy is the, the protrusion and the slot containing the respective opposite surfaces and walls, inclined with respect to the said longitudinal axis and converging in front, with the seat in the protrusion and the hole in the socket located between the said inclined surfaces and walls.

3. The site of the tooth according to claim 1 or 2, characterized in that the hole in the socket and seat the protrusion are arranged around a transverse axis perpendicular to the aforementioned longitudinal axis.

4. The site of the tooth according to claim 3, characterized in that the said reduced or recessed area is defined as the part of the plane perpendicular to the aforementioned transverse axis.

5. The site of the tooth according to any one of claim 2 to 4, characterized in that the said sloping surface and the walls of the projection and slot are respectively top and bottom surfaces and sidewalls of the protrusion and the slot.

6. The site of the tooth according to claim 5, characterized in that the protrusion and the slot have respective opposite side surfaces and walls that are essentially vertical.

7. The site of the tooth according to claim 6, characterized in that each of the mentioned side surfaces of the protrusion has throughout its length a guide groove parallel to the longitudinal axis, where each of the mentioned side walls of the nest is on the inner side of the guide groove suitable for receiving mentioned on rawsumer pile ledge.

8. The site of the tooth according to any one of the preceding paragraphs, characterized in that the said locking finger has a front surface that came in contact with the adapter.

9. The site of the tooth of claim 8, characterized in that the said locking finger has a rear part defining mentioned back surface, the front portion defining mentioned front surface, and an intermediate part made of elastic material.

10. The site of the tooth according to claim 9, characterized in that the said intermediate part is suitable to allow to enter the locking pin by clicking on it in the seat adapter.

11. The site of the tooth of claim 10, wherein the intermediate portion of the locking finger is made of elastomeric material.

12. The site of the tooth in claim 11, characterized in that said elastomeric material is rubber.

13. The site of the tooth according to any one of the preceding paragraphs, characterized in that the hole in the socket and seat the ledge have respective front surfaces, which are parallel to the transverse axis, with the front surface of the seat is rear relative to the front surface of the hole to determine the ledge at the top and the notch at the bottom.

14. The site of the tooth indicated in paragraph 13, wherein the locking pin has a Central portion planted by pressing seat adapter and the end part, respectively cooperating with the said ledge and said groove to limit axial movement of the locking finger.

15. The site of the tooth 14, characterized in that the said end parts are ahead for the Central part so as to define with it a corresponding ledges.

16. The site of the tooth at 14 or 15, characterized in that the wall socket with finger holes are at the level of the mentioned holes thickness at least equal to the height on which are mentioned end part of the locking finger.

17. The site of the tooth under item 16, characterized in that at least the wall in the upper wall of the slot defines together with the tab formed by the front surface of the seat in the adapter, seat aimed for pre-setting the locking finger in the hole in the slot and in the slot in the adapter.

18. The site of the tooth according to any one of the preceding paragraphs, characterized in that the tooth and the adapter are connected with this form to enter each other when assembling the above-mentioned tooth and adapter.

19. The site of the tooth on p, characterized in that the junction line of the tip with adapter Assembly is broken.

20. The site of the tooth according to any one of the preceding paragraphs, characterized in that the protrusion of the adapter goes on the body connection to bucket digging machines, moreover, the mentioned body connection is ahead, in essence, a flat peripheral flange which surrounds the projection and defines a shoulder or stop for a tooth.

21. The site of the tooth in claim 20, characterized in that at least one party mentioned peripheral edge has a tear and there is entered the corresponding additional prong extending from at least one of the walls bounding the socket of the tooth.

22. The site of the tooth according to any one of the preceding paragraphs, characterized in that the socket in the tooth ends in front of a flat bottom defining a front support ledge.

23. The site of the tooth on article 22, wherein the protrusion has, in essence, a flat front end face lying on the flat bottom of the slot.

24. The site of the tooth under article 22 or 23, characterized in that the said flat bottom nests surrounded by a peripheral groove of the slot.

25. The locking finger of node tooth bucket digging machines, having an elongated body, which runs along the main axis, containing two side parts parallel to the mentioned main axis from one end of the finger to the other, and the Central part of the elastic material located between the said side parts, where one of the mentioned side parts has a flat outer surface, wherein one of the said side parts has, in respect of which the said main axis, the Central part of which goes two end parts, transversely protruding from the Central part, at least, in the opposite direction to the other side, in order to define, together with the said Central part corresponding ledges or recesses.

26. The locking finger A.25, characterized in that the said side portion has a rectangular cross-section.

27. The locking pin on p. 25 or 26, characterized in that the other of the said side parts has, in essence, a semi-circular cross-section.

28. The locking finger in item 27, characterized in that the said projecting side parts are made in the side of the semi-circular section.

29. Tooth bucket digging machines, having a socket open at the back and defined by the top wall, bottom wall and side walls where the above-mentioned top and bottom walls are inclined and converge toward the front end face of the above-mentioned tooth where the above-mentioned upper and lower walls intersected by hole suitable for receiving a finger to secure the tooth to the adapter, where each of these top and bottom walls around the said hole passes a portion that extends into the socket and suitable shape for connection with the corresponding lower region, made in the adapter, wherein the side opposite the open part, the said socket has a flat bottom surrounded by a peripheral groove or slot.

30. The tooth under clause 29, characterized in that the said protruding portion is formed by a thickening of the corresponding wall around the holes for the locking pin, and the said thickening gradually increases towards the open part of the slot so as to define a plane perpendicular to the axis of the hole.

31. The tooth according to any one of p-30, characterized in that the guide groove is made on the inner surface of each of these side walls.

32. The tooth according to any one of p-31, characterized in that the prong passes, at least one of the sides bounding the open part of the slot in continuation of the corresponding wall.
Priority items: 25.11.2005 according to claims 1-32.



 

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The invention relates to earth moving equipment, namely to shovel cyclic actions, and can be used in the mining industry

FIELD: earth-moving equipment.

SUBSTANCE: proposed excavator tooth unit contains holder with main part and nose part, both arranged coaxially relative to longitudinal axial line of holder. Main part is made for fastening said holder to excavator. Nose part terminates in free front end and it has upper and lower surfaces located mainly respectively higher and lower than longitudinal axial line of said holder. Upper surface of said nose part has two inclined sides arranged at opposite sides from longitudinal axial line and in front relative to rear end of said nose part over its length. Each inclined side of said upper surface is arranged at angle of 25-65° to horizontal plane. Lower surface of said nose part has two sides arranged at opposite sides relative to longitudinal axial line of said holder. Cavity made in said nose part comes to one of inclined sides of said upper surface of nose part of holder, being arranged along axis intersecting opposite sides of upper and lower surfaces of said nose part at angle of 30-60° to horizontal plane. Excavator tooth has front and rear end parts. Blind space open to rear end of said tooth and designed for fitting-in section of nose part of holder is made in rear end part of said tooth. Tooth is provided with hole arranged in working combination with inclined cavity of holder when tooth and holder are in working connection. Pin-type locking device is provided being arranged in cavity of said holder and at least partially passed through hole in said tooth for detachable fastening of tooth and holder in working connected. Tooth and holder described in invention form with tooth unit a ground of inventions.

EFFECT: improved reliability of excavator tooth unit.

40 cl, 31 dwg

FIELD: excavation equipment, particularly small metalwork for digging elements.

SUBSTANCE: unit for wearing and supporting members has replaceable tooth head and holding structure including intermediate holder with front part of front end arranged in pocket of rear end of tooth head and complementary thereto. Front part is secured in the pocket by the first glut pin structure. Holding structure also has main holder with front part of front end complementarily inserted in pocket of rear end of intermediate holder and secured in the pocket by the second glut pin structure. Rear end of main holder is operatively secured to cutting blade of excavator bucket. Each front part have oval configuration elongated in horizontal direction. Glut pin structures extend in horizontal direction. Front parts have reinforcing projections arranged in orifices adapted to secure front parts. Holder and tooth head are provided with mating ribbed areas.

EFFECT: reduced unit size, improved power and working characteristic, as well as wear-resistance characteristics.

40 cl, 7 dwg

FIELD: dredgers or soil-shifting machines for special purposes, particularly to cut chaps in ground.

SUBSTANCE: device comprises at least one cutter brought into rotation and at least one the first cutting member to cut ground during cutter rotation in the first direction. At least one the second cutting member for ground cutting rotated in the second direction opposite to the first one is installed on the cutter. At least one of the cutting members may be shifted from the first ground cutting position to the second diverted position. Executive tool to shift the cutting member between the first and the second positions is also provided.

EFFECT: increased cutting ability in both rotational directions, prevention of excessive cutting member wear.

12 cl, 2 dwg

FIELD: mechanical engineering; design of excavator dipper teeth.

SUBSTANCE: parallelepiped inserts are fitted in tooth point and inserts of cylindrical form are fitted further on along working plane. Inserts manufactured of wear-resistant cast iron, owing to shadow effect, prevent intensive abrasive wear of steel base, thus increasing service life of tooth. As wear-resistant inserts are arranged only on one of working surfaces, other surfaces (opposite one) is subjected to more intensive wear which provides finally sharpening of tooth in process of operation. Use of such design and method of manufacture make it possible to increase service live more than two times and provided reliability of operation of excavator dipper.

EFFECT: increased service life and provision of self-sharpening of tooth point owing to fitting-in small size wear-resistant cast iron parts in steel base.

4 cl, 4 dwg

FIELD: mining and building, particularly material shifting devices adapted to releasably connect replaceable bit of excavation tooth with transitional extension structure fastened thereto.

SUBSTANCE: replaceable bit is telescopically put on transition extension and removably secured thereto by means of elongated flat connection unit provided with side peripheral part free of constriction. Connection unit extends in longitudinal direction through bit and connection orifices aligned with each other and prevents bit removal from transitional extension by forward movement thereof. Transversal support surface of bit side facing one end of connection unit prevents it outward passage through one bit orifice. Blocking member supported by another connection unit end and engaged with groove in another bit orifice prevents outward connection member passage through bit orifice provided with grooves. Support structure releasably retains the blocking member in closing and opening directions, which prevent blocking member displacement parallel to connection unit length.

EFFECT: simplified working tool replacement.

51 cl, 5 dwg

FIELD: mining industry.

SUBSTANCE: invention can be used in working members of mining and earth-moving machines, particularly, in machines for digging hard and frozen soils. Proposed ripper point for breaking hard and frozen soils has shank with slot for fastening, and wedge-like working part formed by front end surface, two side surfaces and rear surface. Working part of front end surface located in place of intensive wear is reinforced along longitudinal axial line H-H by three of stress concentrators, being round elements projecting over front end working surface and dipped into body of point. Distance L between concentrators in row and distance 1 between rows is equal to triple value of their diameter.

EFFECT: reduced effort to applied to small soil, reduced power consumption for ripping, increased service life of ripper point.

3 dwg

FIELD: mining, particularly excavation equipment for detachable connection of replaceable tooth crown in earth-shifting machine.

SUBSTANCE: device comprises the first and the second telescopically joined members, aligned orifices formed in the members and adapted for connector receiving and connection finger unit for forced retention of the first and the second members so that the members are telescopically arranged one relatively another. Connection finger unit comprises body, fixing member and resilient stop member. The body is arranged in the aligned orifices so that the body may be removed therefrom. The connector prevents separation of the first member from the second one. The body also has channel opened in outer surface thereof and having non-round side surface section. Fixing member is arranged in channel and limited by side surface section. The fixing member may rotate with respect to the body from fixing position into releasing position and in reverse direction. Resilient stop member is connected with fixing member so that the stop member may rotate together with fixing member. The stop member is adapted to retain fixing member in fixing position. The stop member has periphery delimiting fixing member. The periphery is slidably joined with non-round side surface section so that the periphery and the side surface are mutually complementary.

EFFECT: increased efficiency of connection unit for wearing and support member connection.

37 cl, 14 dwg

FIELD: construction.

SUBSTANCE: cog unit of earthmover bucket comprises cog with seat, which is open at the back and is a female part, besides specified cog has hole for fitting of fixing stud, adapter, having ledge, which is a male part that matches shape of specified seat, besides mentioned ledge is crossed with matching site for fixing stud, fixing stud inserted into specified hole of cog and into specified matching site in adapter and serving for cog fixation to adapter. At least one of specified opposite surfaces of ledge has lowered or deepened area arranged around matching site for fixing stud. At least the wall of seat that is inverted towards specified surface of ledge has relief part additionally to specified lowered or deepened area, having shape of boss that gradually increases in direction of open part of seat. Specified hole in seat walls and specified matching site in ledge have according flat back surfaces, which are matched to each other. Fixing stud has flat back surface, which simultaneously lies onto specified back surfaces of hole and matching site.

EFFECT: simplified design of cog unit for manufacturing, lower costs, avoidance of cog disconnection from adapter under severe operation conditions.

32 cl, 14 dwg

FIELD: transport.

SUBSTANCE: proposed device comprises tooth arranged in adapter and connecting element with sleeve made from elastic deformable material, and key. Said tooth and adapter have holes and zones to receive said sleeve and key. Note that said key is inserted into sleeve to extend therefrom. Note also that said key is fitted aligned with sleeve to displace therein, while sleeve is arranged in adapter part. Key has end part that makes key base, and key head on the body opposite part. Key head has part that makes bearing surface with shifted center. The latter enters appropriate surface made in the tooth first hole. Key head end can be turned by actuator element. Key base has anchoring appliance that enters in elastically deformable sleeve due to first tightening preset-force action. Key base end has conical part that thrusts against tooth second hole making second tightening action exceeding aforesaid one and created by key turn. Key turn governs is shift relative to its initial axis and allows its locking by anchorage on either tooth metal components or different bearing zones.

EFFECT: appropriate locking of tooth-adapter link, higher labor safety.

16 cl, 21 dwg

FIELD: construction.

SUBSTANCE: group of inventions relates to the field of mining and construction, in particular, to rotary cutting tool, which may be used to pierce through thickness of soil. Rotary cutting tool includes body, which has axial front end and axial back end, and also axial length. Hard tip, which has remote end, is fixed to body of cutting tool at its axial front end. Body of cutting tool has a section of back surface, arranged along axis behind remote end of hard tip, and having transverse dimension. Section of back surface includes axial front transverse dimension and minimum transverse dimension, which is located along axis behind axial front transverse dimension. Axial front dimension exceeds minimum transverse dimension. Section of back surface has axial length within the limits from approximately 10% to 35% of axial length of cutting tool body.

EFFECT: improvement of rotary cutting tool, to reduce extent of resistance of rotary cutting tool when piercing through soil thickness, with small angle of separation.

32 cl, 9 dwg

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