Shank-type cutter

FIELD: mining.

SUBSTANCE: shank-type cutter with base part includes shank; at that, shank carries the top of cutter made from hard-alloy material, and base part in the zone between shank and cutter top has the receiving section in which the head part is retained. Head part includes circumferential surface for removal of the cut material, which converges in the direction of the cutter top. At that, as per the first version, the head part is retained relative to the base part with possibility of being turned, and surface for removal of the cut material ends in the area of the base part end receiving the cutter top. As per the second version, head part has limit stop (support section) and/or mating surface, which restricts the erection movement of the head part on base part on support surface of the base part. As per the third version, base part has a clamping sleeve in the area of the shank. At that, head part is put on clamping sleeve, and at that, head part retains the clamping sleeve in pre-load position.

EFFECT: reducing the costs for elements at optimised wear.

12 cl, 4 dwg

 

The invention relates to a tail cutter, in particular the cutter road cutters, with the base part containing the shank, with the shank carries the top of the cutter from a carbide material, while the base portion in the area between the shank and the tip of the cutter has a receiving parcel on which is held the head part and the head part contains tapering towards the top of the cutter circumferential surface for removal of cut material.

Such a tail cutter is known from patent publication DE 3818213 A1. It uses a two-part base part, which has a tail area of steel and the tool holder. Tool holder carries the receiving element of the top of the cutter and is connected by soldering with the tail section. In the transition area between the tail section and the tool holder is equipped with a ceramic shell in the form of a sleeve.

The ceramic shell is glued to the holder, as well as with the base part. In the operating mode the tail cutter rotates. Hard ceramic shell rubs against the landing surface of the tool holder, which carries a tail cutter. With this ceramic sheath cut into the landing surface and deterioration of the tool holder. As the tool holder is a more expensive item compared to the tail-cutter, who is the undesirable operation.

From DE 102004053666 A1 famous tail cutter, which has a protective sheath as the head part comprises a base part and is welded to it. To avoid friction between the head part and the tool holder, uses protect from wear washer. This additional feature increases the cost of the elements of the tail cutter.

The objective of the invention is to create a tail cutter of the aforementioned type, the construction of which has a lower cost items with optimized wear.

This task is solved in that the head part is held relative to the base part with the possibility of turning. Due provorachivayuschie the head part relative to the base part, the base part can rotate in the operating mode of the instrument and the top of the cutter wears out evenly. In turn, the head part can remain in their position during pulse load or fail to rotate in the same degree as the basic part. However, it is also possible to implant if necessary, the head part directly on the supporting surface, for example, the holder without having to expose it to heavy wear due to the rotation.

According to one preferred variant of the invention, can be provided that the head part is installed considers the flax base part with the possibility of turning around the middle longitudinal axis of the base part.

If the tail cutter is presented so that the head part contains an annular bearing surface that is concentric covers the hole, and in this opening is placed the base portion, the bearing surface forms a support (contact) zone, which can be applied directly to the corresponding mating surfaces of the tool holder. This raises the efforts of compression is transferred from the tail cutter directly on the tool holder.

This can also be provided that the head part has a round hole centering spigot, which has a continuously extending in the direction of the support surface of the centering surface. Centering the belt aligns in such a case, the tail cutter for receiving the centering element holder. Thus, the centering receiving element and centering spigot form also closing system, which hinders the penetration of dirt.

For good drainage rock cutting/bituminous material provided that the head part has a concave or conical surface for removal of cut material, which in its diameter tapers towards the top of the cutter.

Place mates head part with the base part can be made so that the head part has a hole, cylindrical and/or the conical wall of which forms a landing surface, which adjoins or may adjoin the receiving section of the base part.

Cylindrical geometric pairing provides a very easy rotating interaction between the head part and the base part. On the contrary, when choosing a cone-boarding connections free, unimpeded rotatably in the working mode is limited in favor of an improved seal between the head part and the base part. The angle of taper of the conical connection is made subject to the requirements in respect of depreciation and operating conditions.

If it is provided that the head part rests relative to the base part via an elastic support element, resulting in the operating mode of the shock load are damped by elastic support element.

In addition, between the head and the base part can be created with "pumping"that allows you to remove what is happening from time to time pollution.

To create the specified matching position between the head and the base part may be provided that the head part has the focus (the reference site) and/or response surface, which limits the mounting (installation) movement of the head part on the base part. One preferred variant of the invention presented in a way that the base portion in the area of the shank is SAG is MOU sleeve, moreover, the head part is placed on the clamping sleeve, and the head part holds the collet in position preload, and the head part is that you can remove the clamping sleeve so that the head part frees her and the clamping sleeve expands in its unloading position with a larger diameter. Collet used in a known manner to clamp the tail cutter in the receiving hole of the tool holder with the possibility of replacement.

Due to the fact that the head part creates the preload protracted sleeve, protracted sleeve can be easily inserted into the receiving hole. Then, for example, by a blow of a hammer on the top of the cutter head part is removed from the clamping sleeve. When this clamping sleeve occupies its mounting position and is dispersed in the receiving hole.

Optimal wear the parameters of the tail cutter is achieved when provided, that the base portion in the area carrying the top of the cutter end has a circumferential shoulder, the surface of which goes to the surface for removal of cut material and which radially overlaps the input cross-section in the landing surface of the head part. This shoulder also protects the transition between the head part and the base part.

According to one especially preferred is the option of carrying out the invention, provided that the head part and the base part are of different hardness and/or toughness of the material. Thus, for example, the material for the head part may be solid, and the material for the base part is viscous. If the head part is used so that it is placed directly on the tool holder, it is recommended that the holder had in the contact area with the head part of a greater hardness than the head part.

Below the invention is explained based on the drawings of the embodiment. Shown:

Figure 1 - tail cutter in the perspective image;

Figure 2 - tail cutter with Figure 1 in side view and prepared to blow the image;

Figure 3 - image 2 in the top view and

Figure 4 - the tail cutter according to Figure 2 and 3 in side view and in longitudinal section.

Figure 1 shows the tail cutter with the base part 10, the head part 30, the clamping sleeve 20 and the top 18 of the cutter of the carbide of the metal.

As shown in figure 2 and 4, is made of steel profile base portion 10 comprises a cylindrical shank 11. In its Central zone of the shank 11 is provided with a circumferential groove 12.

A shaft 11 mounted with longitudinal slot is made of a steel sheet clamping sleeve 20. Cylindrical internal cross-section of the clamping sleeve 20 is designed is so, the shank 11 can rotate freely inside the clamping sleeve 20. The clamping sleeve 20 is located symmetrically with respect to its middle transverse plane of the locking elements 21. The locking elements 21 are (engaged) in the groove 12 and hold the clamping sleeve 20 in the axial direction without loss, but with the possibility of free rotation on the base part 10. Due to the symmetrical execution of the clamping sleeve 20, it can be mounted on the base part 10 in two rotated 180 positions.

The shank 11 of the base part 10 is adjacent the transition section 13, which passes into the cylindrical receiving section 14. The receiving section 14 has a relatively shank 11 is an enlarged cross-section. To the receiving section 14 is adjacent the shoulder 15, which is perpendicular to the middle longitudinal axis of the base portion 10 of the supporting surface 16. Adjacent to the supporting surface 16 shoulder 15 provided with a convex surface for removal of cut material. The base part 10 in a region located from the shoulder end provided with a Cup-shaped receiving element 17, to which are soldered the top 18 of the cutter.

The head part 30 is made as a molded part made of a metallic material. Rotationally-symmetrical head part 30 has an annular bearing surface 31 of the cat who Roy is centering spigot 32. This centering spigot 32 is made conical and tapers from the support surface 31. The head part 30 in the direction of Central longitudinal axis M concentric penetrated hole, and centering spigot 32 comprises on one side an inlet opening in the through-hole.

A through hole is designed as a stepped hole, while adjacent to the centering belt 32 support section 36 defines a first diameter. The area of the diameter of the head part 30 mounted on the clamping sleeve 20. The inner diameter is made smaller than the outer diameter of the clamping sleeve 20 in its uncompressed position.

Thus the clamping sleeve 20 is held with the head part 30 in position preload, allowing easy installation of the tail cutter in the tool holder. The outer diameter of the prestressing clamping sleeve 20 is expected in this case so that the clamping sleeve 20 can be easily inserted into the receiving bore of the tool holder. The supporting section 36 of the head portion 30 is adjacent cylindrical Seating surface 35 of larger diameter. The inner diameter of this Seating surface 35 is chosen equal to the outer diameter of the receiving section 14 or exceeding it. In a landing surface 35 enclosed is reversed to the support section 36 - pack is why supporting element 38 in the form of o-rings made of rubber. On the external side of the head part 30 has a concave surface 34 for removal of cut material, which in the assembled state passes flush into the convex surface for removal of cut material of the shoulder 15. At its converts from the top 18 of the cutter side surface 34 for removal of cut material passes into a cylindrical shoulder 33 and the abutment surface 31. For better removal of cut material in the surface 34 for removal of cut material done longitudinal recesses 34.1.

For mounting the tail cutter as described above, together with its clamping sleeve 20 is inserted into the receiving bore of the tool holder up until the abutment surface 31 will not fit to the corresponding mating surfaces of the tool holder. Hammer blow on the top 18 of the cutter head part 30 is displaced relative to the base part 10 in the direction of Central longitudinal axis M and in the direction of the head 18 of the cutter.

While the landing surface 35 is adjudged to be in an area of the receiving area 14. At the same time supporting area 36 releases the collet 20 and the clamping sleeve 20 is dispersed in the radial direction. It jams on the inner wall of the inlet opening of the holder.

Movement offset head part 30 is limited to the supporting surface 16 of the shoulder 15. It adjoins to laamrani environmental response surface 37 of the head part 30.

By means of the shoulder 15 of the head part 30 is held without the possibility of falling axially in the direction of the head 18 of the cutter relative to the base part 10. At the same time supporting section 36 based on the elastic supporting element 38 of the head 30 relative to the base part 10. In the opposite direction of the tool holder prevents the displacement of the head part 30 relative to the base part 10.

Thus, the head part 30 is axially retained without loss, but with the ability to rotate around its center longitudinal axis.

The support element 38 is attached in assembled condition in the area of the transition area to the receiving area 14. When loading the base portion 10 in the axial direction of the supporting element 38 may be compressed so that it can damp the shock.

In the operating mode of the instrument tail cutter influences with its top 18 for cutting rock/bituminous material. The base part 10 is pressed against a Seating surface 35 of the head part 30. At the same time the base part 10 based on the response surface 37 and/or on the support section 36.

1. Tail cutter with the base part (10)having a shank (11), the shank (11) has a top (18) of the cutter from a carbide material, while the base part (10) in the zone between the shank (11) and a top (18) of the cutter has adopted teaching the current (14), on which is held the head part (30)and head part (30) has a tapering towards the top (18) of the cutter circumferential surface (34.1) for removal of cut material with the head part (30) is held relative to the base part (10) with the possibility of turning and the surface (34.1) for removal of cut material ends in the area receiving the top of the cutter end of the base part (10).

2. Tail cutter with the base part (10)having a shank (11), the shank (11) has a top (18) of the cutter from a carbide material, while the base part (10) in the zone between the shank (11) and a top (18) of the cutter has a receiving area (14)on which is held the head part (30)and head part (30) has a tapering towards the top (18) of the cutter circumferential surface (34.1) for removal of cut material with the head part (30) has a stop (reference section (36)and/or response surface (37), who nd restricts the mounting movement of the head part (30) on the base part (10) on the support surface of the base part (10).

3. Tail cutter with the base part (10)having a shank (11), the shank (11) has a top (18) of the cutter from a carbide material, while the base part (10) in the zone between the shank (11) and a top (18) of the cutter has a receiving area (14), which is held goal the main portion (30), and the head part (30) has a tapering towards the top (18) of the cutter circumferential surface (34.1) for removal of cut material, while the base part (10) in the area of the shank (11) carries the clamping sleeve (20), and on the clamping sleeve (20) mounted head part (30)and head part (30) holds the clamping sleeve (20) in position preload.

4. Tail cutter according to one of claims 1 to 3, characterized in that the head part (30) is installed relative to the base part (10) with the possibility of turning around the middle longitudinal axis (M) of the base part.

5. Tail cutter according to one of claims 1 to 3, characterized in that the head part (30) includes an annular bearing surface (31)that is concentric covers the hole, and in this opening is placed the base part (10).

6. Tail cutter according to claim 5, characterized in that the head part (30) has a round hole centering spigot (32), which has a continuously extending in the direction of the support surface (31) of the centering surface.

7. Tail cutter according to one of claims 1 to 3, characterized in that the head part (30) has a concave or conical surface (34) to remove the cut material, which in its diameter tapers towards the top (18) of the cutter.

8. Tail cutter according to one of claims 1 to 3, characterized in that the head part (30) who meet the hole, which its cylindrical and/or conical wall forms a landing surface (36), which adjoins or may snugly receiving area (14) of the base part (10).

9. Tail cutter according to one of claims 1 to 3, characterized in that the head part (30) is supported relative to the base part (10) via an elastic support element (38).

10. Tail cutter according to one of claims 1 to 3, characterized in that the head part (30) is arranged to remove the clamping sleeve (20) in such a way that it frees her and the clamping sleeve (20) is dispersed in its unloading position with a larger diameter.

11. Tail cutter according to one of claims 1 to 3, characterized in that the base part (10) in the area carrying a top (18) of the cutter end has a circumferential shoulder (15), the surface of which goes to the surface (34) for removal of cut material and which radially overlaps the input cross-section in a landing surface (35) of the head part (30).

12. Tail cutter according to one of claims 1 to 3, characterized in that the head part (30) and the base part (10) have different hardness and/or toughness of the material.



 

Same patents:

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Tail drilling bit // 2434999

FIELD: mining.

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28 cl, 2 dwg

FIELD: construction.

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32 cl, 9 dwg

FIELD: transport.

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16 cl, 21 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.

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32 cl, 14 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: mining industry.

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3 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: 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: 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

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