WO2021151833A1

WO2021151833A1 - Cone crusher crushing cone, crushing cone mantle holder for a cone crusher crushing cone, crusher having a cone crusher crushing cone and method for fastening and releasing a crushing cone mantle

Info

Publication number: WO2021151833A1
Application number: PCT/EP2021/051603
Authority: WO
Inventors: Ramon OLIVEIRA MOTTA; Claus Richter
Original assignee: Thyssenkrupp Industrial Solutions Ag; Thyssenkrupp Ag
Priority date: 2020-01-29
Filing date: 2021-01-25
Publication date: 2021-08-05
Also published as: DE102020201064A1

Abstract

The present invention relates to a cone crusher crushing cone comprising: a crushing cone shaft having an external thread; a crushing cone body which is arranged non-rotatably and concentrically around a portion of the crushing cone shaft; a crushing cone mantle which is supported on the crushing cone body; and a crushing cone mantle holder which comprises a nut, which has a central threaded hole with an internal thread which interacts with the external thread of the crushing cone shaft, and a clamping ring which has a central opening and fixes the crushing cone mantle on the crushing cone body. The crushing cone mantle holder comprises at least two externally threaded screws, and the nut has at least two bores, of which each bore has an internal thread and is associated with a specific one of the at least two screws, the internal thread of each bore interacting with the external thread of the specific associated screw in such a way that, due to a rotary movement of the at least two screws relative to the nut, the distance between the clamping ring and the nut can be changed from a first distance to a second distance which is different from the first distance, so that the internal thread of the nut is axially braced against the external thread of the crushing cone shaft. Furthermore, the invention relates to a crushing cone mantle holder, a crusher and a method for fastening a crushing cone mantle to a crushing cone body or releasing it therefrom.

Description

Cone crusher crushing cone, crushing cone casing holder for a cone crusher crushing cone, crusher with a cone crusher crushing cone and methods for attaching and loosening a crushing cone casing

The invention lies in the field of comminution technology and relates to a cone crusher crushing cone with a crushing cone axis with an external thread, a crushing cone body which is arranged non-rotatably and concentrically around a portion of the crushing cone axis, a crushing cone casing which is supported on the crushing cone body, and a crushing cone casing holder that has a Nut with a central threaded hole with an internal thread which cooperates with the external thread of the crushing cone axis and comprises a clamping ring which has a central opening and fixes the crushing cone shell on the crushing cone body, and in particular fixes the crushing cone shell in a clamping connection on the crushing cone body. Furthermore, the invention relates to a crushing cone jacket holder for a cone crusher crushing cone, a crusher with a cone crusher crushing cone, a method for attaching a crushing cone jacket to a crushing cone body and a method for detaching a crushing cone jacket from a crushing cone body.

Crushers are mechanical crushing systems for crushing lumpy feed material (crushed material), whereby the grain shape and the mean grain size of the feed material is mechanically reduced during the crushing process, so that its grain size distribution is influenced in a targeted manner. Using crushers, agglomerates, composites and other composite structures in particular can also be broken down in the feed material in order to expose their subunits or components. The feed material is typically a mineral raw material with grain sizes in the coarse to medium size range. For example, crushers are used industrially in mining companies for processing coal, ores, salts or other minerals, in quarries and gravel works for the extraction of sand, gravel, chippings and crushed stone with the desired properties, in industrial companies for crushing the raw materials used such as lime works, coal-fired power plants or chemical plants (in the latter also for processing products), in cement works for processing cement or in the construction industry for processing building rubble, for which these crushers can be designed to be stationary or mobile. Crushers naturally offer a particularly large number Advantages if feed material is to be comminuted which exhibits brittle fracture behavior.

For the continuous coarse crushing and pre-crushing of brittle, medium-hard and hard feed material, cone and rotary crushers are used, in which pressure crushing and / or impact crushing is carried out, in which the feed material is exposed to high mechanical stress. This type of crusher has a crushing space which is formed at least essentially by a hollow cone-shaped housing and a crushing cone. The hollow cone-shaped housing is at least partially lined with a wear-resistant crusher jacket. Correspondingly, at least part of the lateral surface of the crushing cone is also covered with a wear-resistant crushing cone jacket. Crusher casing and crushing cone casing are subject to high wear due to the mechanical stresses during the crushing process and are therefore designed to be replaceable as wear parts. The crushing cone is arranged as a movable conical crushing element on a crushing cone axis (crushing axis, crushing axis, crushing cone shaft, crushing cone pin) in the crushing space. At the bottom, the crushing space is delimited by an annular gap which is formed by the lower area of the crushing cone shell and the lower area of the crusher shell and which represents the discharge gap for the broken material.

The lower end of the crushing cone axis protrudes into an eccentric bushing so that the axis of rotation of the shaft that drives the eccentric does not coincide with the central axis of the crushing cone axis. In the crushing operation, the crushing cone axis - and thus also the crushing cone - is therefore set in a rotating tumbling motion. Accordingly, the annular gap does not have a constant gap width, rather it has a gap width which changes periodically along the circumference of the lower region of the crushing cone jacket during operation. During the tumbling movement of the crushing cone in the crushing space, the annular gap opens and closes all around, with the opening and closing taking place simultaneously on opposite sides of the crushing space. Typically, the gap width is changed by raising and lowering the crushing cone. Depending on the type of feed material and the characteristics of the broken material to be achieved, different designs can be used, the characteristic size of which is the opening angle (cone angle) of the crushing cone: In a flat cone crusher, the crushing cone has a large opening angle (in particular an opening angle between about 65 ° to about 80 °), whereas the crushing cone of a steep cone crusher has a small opening angle (in particular opening angle between about 13 ° to about 45 °). Steep cone crushers are typically used as primary crushers in order to subject feed material of large grain size with different grain shape and, in some cases, a broad grain size distribution to pre-crushing. The cones of steep-cone crushers are operated with rather low rotational speeds, so that the abandoned chunks of material migrate downwards in the crushing chamber and are crushed by the periodically changing pressure acting on them (principle of pressure crushing). Flat cone crushers, on the other hand, are used as secondary crushers in order to crush feed material of medium or small grain size with at least essentially similar grain shape; Secondary crushers are often arranged in the material flow path behind primary crushers. Flat cone crushers are operated with rather higher rotational speeds; in addition to the periodically changing pressure load, there is then a further, impulse-like load, through which the feed material is comminuted (principle of impact comminution).

If a cone crusher is used as a coarse crusher, both crushing surfaces - the outside of the crushing cone shell and the inside of the crusher shell - often run in a straight line, so that they have the geometric shape of a truncated cone. If, on the other hand, the crusher is used as a fine crusher, the crushing surfaces can also be concave / convex. In addition, the surfaces of the crushing cone shell and / or crusher shell can also have a rib structure.

In principle, gyratory crushers and cone crushers have a similar structure. In the case of a rotary crusher, the crushing cone axis is mounted in the upper part of the crusher in a spherical bearing as a head bearing, which is arranged on a cross member. With this arrangement, the crushing cone axis derives the horizontal crushing forces both via a bearing at the lower end and via the head bearing into the crusher housing. Rotary crushers can be used as steep cone crushers or as Insert flat cone crusher. In contrast, with the cone crusher, the upper end of the crushing cone axis is cantilevered so that there is no head bearing. With this arrangement, the crushing cone axis can only derive the horizontal refractive forces via a bearing at the lower end. Here a short, particularly powerful shaft absorbs all forces and transfers them to the crusher housing. Cone crushers can be used as flat cone crushers.

Cone crushers typically have three areas, namely the lower section (which contains, among other things, the drive and the discharge device for the broken material), the middle section (which contains, among other things, the crushing space with the crushing cone and at least part of the crusher jacket) and the upper section (which contains, among other things, the feeding device).

The crushing effect of a cone crusher is achieved with the circumferential tumbling movement of the crushing cone, in that the changing annular gap between the crushing cone shell and the crusher shell exerts pressure on the feed material so that it breaks up and is thus crushed. Crushing cone casing and crusher casing are therefore exposed to particularly high mechanical loads and therefore have to be replaced from time to time, which is why they are detachably fastened in the cone crusher. For this purpose, the crushing cone typically has a crushing cone body which is non-rotatably connected to the crushing cone axis. On the outside of the crushing cone body lies the crushing cone jacket, which is typically designed as a bell-shaped hollow cone and has an opening in its upper section through which the crushing cone axis is guided. The crushing cone jacket is fixed to the crushing cone body, for which different fastening systems exist.

In a common system for fastening the crushing cone jacket to the crushing cone body, the crushing cone axis has an external thread above the crushing cone body. The crushing cone shell is placed on the crushing cone body in such a way that the upper section of the crushing cone shell is positioned below the external thread of the crushing cone axis. In order to fix the crushing cone shell on the crushing cone body, a nut - typically a ring nut - is screwed onto the external thread of the crushing cone axis. In the screwed and fixed final state, the nut then touches the upper section of the crushing cone jacket and presses it onto the crushing cone body. When screwing, a specifically designed special tool is used, by means of which a correspondingly high torque must be provided in order to press the nut firmly against the breaking cone shell and to prevent this connection from being loosened undesirably. In conventional fastening systems, the torque required for this is very high, and the dimensions of the crushing cone axes require the use of relatively large special tools, the handling of which is problematic in practice, so that fastening the crushing cone jacket on the crushing cone body is associated with considerable difficulties.

In addition, the crushing cone shell can expand and deform due to the high mechanical forces during the crushing process and the local heating caused by friction. As a result, the tightened nut experiences additional tension, which can make it considerably more difficult to loosen the nut later when changing the crushing cone jacket. For this reason, common fastening systems provide for the use of an additional ring washer as a sliding sealing ring (the so-called "focal ring"), which is arranged between the upper section of the crushing cone jacket and the underside of the nut. In order to prevent the connection between the nut and the washer from becoming detached during operation, the nut and the washer can also be welded to one another. When replacing the (deformed) crushing cone jacket, the ring disk must first be separated using a cutting torch, which reduces the tension and the ring nut can be easily loosened. When cutting the ring disk with the cutting torch, however, there is a risk of damaging the crushing cone axis or the crushing cone body.

Accordingly, it is the object of the present invention to avoid the existing disadvantages of the fastening systems known from the prior art and, in particular, to provide a cone crusher crushing cone which enables the crushing cone jacket to be easily attached and detached from the crushing cone body without the need for fastening and Loosening special tools are required so that this can be done with commercially available torque wrenches or wrenches without the risk of damaging the elements of the crushing cone that are not designed as wearing parts, such as the Crushing cone axis. In addition, the task is to create a simple and inexpensive to implement system that enables comfortable and secure attachment and detachment of the crushing cone jacket on or from the crushing cone body and that ensures the reliable operation of a cone crusher with high performance. A further object of the present invention is to provide a crushing cone casing holder for such a cone crusher crushing cone and a crusher with such a cone crusher crushing cone which offers a high total loosening torque without the need for special tools for tightening or loosening; Due to the high total loosening torque, an unintentional loosening of the crushing cone casing holder on the crushing cone axis during operation of the cone crusher is made more difficult. Finally, further objects of the present invention are to provide a method for attaching a crushing cone shell to a crushing cone body and a method for detaching a crushing cone shell from a crushing cone body.

The present object is achieved with a cone crusher crushing cone and a crushing cone shell holder for a cone crusher crushing cone, a crusher with a cone crusher crushing cone, a method for attaching a crushing cone shell to a crushing cone body and a method for releasing a crushing cone shell from a crushing cone body with the independent claims specified features. Advantageous further developments result from the subclaims, the following description and the drawings. In particular, the object is achieved with a cone crusher crushing cone of the type mentioned at the outset, in which the crushing cone casing holder comprises at least two screws with an external thread and the nut has at least two bores, each of which has an internal thread and is assigned to one of the at least two screws, wherein the internal thread of each bore cooperates with the external thread of the respectively assigned screw in such a way that as a result of a rotational movement of the at least two screws relative to the nut, the distance between the clamping ring and nut can be converted from a first distance to a second distance, which is different from the first distance is, whereby the internal thread of the nut is axially braced against the external thread of the breaking cone axis. Basically, the present invention relates to the cone crusher generally described in the introduction and its individual components, in particular a corresponding cone crusher crushing cone. In connection with the invention, the term “cone crusher” includes not only cone crusher in the actual sense, but also gyratory crusher. In general, cone crushers are crushing systems for crushing lumpy crushed material with a crushing space which is formed at least essentially by the inside of a housing and the outside of a crushing cone. The crushing cone is a movable, conical (or at least conical, that is, its shape is derived from the basic shape of a cone) breaking organ. The crushing cone comprises a conical (or at least conical) basic element, the crushing cone body, which is arranged in the crushing space on a crushing cone axis and connected to it in a rotationally fixed manner, so that the crushing cone body rotates concentrically with the crushing cone axis. Typically, crushing cone body and crushing cone axis are manufactured as separate components that are connected to one another for operation. However, the crushing cone body and the crushing cone axis can also be formed in one piece, so that the crushing cone body and the crushing cone axis are then integral components of the crushing cone. The crushing cone axis is an elongated, at least essentially cylindrical machine element which serves to support the crushing cone body and rotates with the crushing cone body seated on it. The crushing cone axis protrudes beyond the crushing cone body and is rotatably mounted in its lower area in an eccentric bushing so that the axis of rotation of the shaft that drives the eccentric does not coincide with the center axis of the crushing cone axis. In the crushing operation, the crushing cone axis and thus also the crushing cone are set in a rotating tumbling motion. (Although the lower area of the crushing cone axis is rotatably mounted in the eccentric bushing, in its upper area it is non-rotatably connected to the crushing cone, which is why the crushing cone axis is sometimes also referred to as the "crushing cone shaft".)

The inside of the housing is at least partially lined with a crusher jacket. On the outside of the crushing cone, at least part of the lateral surface of the crushing cone is clad with a crushing cone jacket. Crushing cone casing and crusher casing are wear parts that are detachably connected to the cone crusher. The crushing cone jacket has in its upper section an opening through which the crushing cone axis is guided. In the context of the present application, the terms "below" / "above", "below" / "above" and the like relate to the axial extent of the crushing cone, i.e. the alignment and position of the central axis (axis of rotation) of the crushing cone axis (in the assembled state) ; Similarly, the information "axial" and "radial" refer to the alignment and position of the central axis of the crushing cone axis (in the assembled state), unless otherwise stated.

On the outside of the crushing cone body, the crushing cone jacket rests at least in some areas on the crushing cone body and is thus supported on the crushing cone body. Typically, the support surface is selected to be as large as possible, so that the entire inner surface of the crushing cone jacket can also rest on the crushing cone body. The inside of the crushing cone jacket often has a shape that is derived from a hollow cone and at least approximately follows the outer contour of the crushing cone, but other designs are basically also conceivable for the support surface on the inside. For example, crushing cone shell and crushing cone body can also be designed in such a way that in the assembled state (the operating state in which the crushing cone shell is fixed to the crushing cone) a cavity remains between the crushing cone shell and the crushing cone body in a defined area. If necessary, this can be filled with potting compound via holes after assembly.

During the fastening, the opening in the upper section of the breaking cone jacket is guided over the breaking cone axis so that the inside of the breaking cone jacket comes into contact with the outside of the breaking cone body. Then the crushing cone jacket is fixed on the crushing cone body. For this purpose, the crushing cone has a crushing cone casing holder. In order to be able to connect the breaker cone holder to the breaker cone, the breaker cone axis has an external thread on its outside (jacket surface). The outer diameter of this outer thread is usually smaller than the inner diameter of the opening in the upper section of the crushing cone shell, so that the crushing cone shell can be guided over the outer thread of the crushing cone axis without contact when it is placed or removed. The crushing cone casing holder itself comprises a clamping ring, a nut and at least two screws. The clamping ring has a central opening through which the crushing cone axis is passed; typically the central opening itself does not have an internal thread, but different designs are also possible. In the assembled state, the clamping ring prevents the breaking cone jacket from moving upwards in the axial direction; the breaking cone jacket from moving axially downwards is prevented by the breaking cone, on the upper side of which the breaking cone jacket is at least partially supported. As a rule, the clamping ring is manufactured as a separate element in order to allow the simplest possible assembly; In this embodiment, a lower clamping surface of the clamping ring is pressed against an upper clamping surface of the crushing cone jacket. The clamping connection thus obtained between the clamping ring and the crushing cone shell fixes the crushing cone shell on the crushing cone body also in a clamping connection. As a result, a concentrated force on the clamping ring is desirable here. However, other configurations are also possible in principle. For example, the clamping ring can be designed as an integral part of the crushing cone jacket or it can also be cast into the crushing cone jacket if the nut is arranged above the clamping ring in the assembled state. Even if no clamping connection is entered into between the clamping ring and the crushing cone shell in this embodiment, the crushing cone shell can also be fixed on the crushing cone body here.

The nut has a central threaded hole with an internal thread, which interacts with the external thread of the crushing cone axis, so that in the assembled state the internal thread of the nut forms a screw connection with the external thread of the crushing cone axis. Accordingly, in the simplest case, the interaction of an internal thread and an external thread relates to the design and arrangement as complementary elements of a screw connection. The nut can be designed as desired, for example as a hexagonal nut, as an octagonal nut, as a cross-hole nut or the like; in order to avoid an imbalance during operation of the cone crusher, the design as a ring nut is particularly advantageous. According to the invention, the nut additionally has at least two bores with an internal thread in the axial direction of the nut, the at least two bores being peripheral bores which are arranged around the central threaded hole; these can be distributed symmetrically and regularly around the threaded hole, that is to say at even radial intervals in the circumferential direction of the nut, or they can also be in an asymmetrical arrangement. Each of these at least two bores is assigned to one of the at least two screws of the breaking cone casing holder, each screw having a head (screw head) and a shaft with a threaded section which has an external thread. The head of the screw can basically have any suitable screw head shape, i.e. as an external polygon or internal polygon (for example as a triangle, square, pentagon, hexagon, heptagon, octagon and the like, including the corresponding double polygon variants, each with or without a central recess or central pin), as an outer polyround or inner polyround (for example as three-round, four-round, five-round, six-round, seven-round, eight-round and the like including the corresponding double-multi-round variants, each with or without a central recess or central pin), as an outer Multi-tooth or internal multi-tooth (for example as three-tooth, four-tooth, five-tooth, six-tooth, seven-tooth, eight-tooth and the like including the corresponding double multi-tooth variants, each with or without a central recess or central pin), as a slotted head (e.g. as a slotted head, cross recess or the like) or also be designed differently. The assignment of a bore to a screw is such that the internal thread of this bore is designed to be complementary to the external thread of the respective screw, so that in the assembled state the internal thread of this bore interacts with the external thread of these screws and forms a screw connection. Typically, all of the at least two bores are configured identically and only differ in their arrangement on the nut, so that in principle each of the at least two screws would be suitable for each of the at least two bores. In a departure from this, however, the bores can also be designed differently, so that not each of the at least two screws would be suitable for each of the at least two bores and the pairings would not be mixed up or mixed up. For assembly, the nut is screwed onto the external thread of the crushing cone axis with a low torque and thus only loosely or hand-tight, whereby the screws are already located in the holes of the nut or can only be screwed into the nut afterwards. The screw heads of the at least two screws are arranged upwards so that they are accessible during assembly. The at least two screws are tightened with a low torque until the screws hit the clamping ring. Depending on the design of the breaker cone holder, either the underside of the screw head (the lower annular surface of the screw head, ie its “chin”) or the lower end face of the threaded section of the screw can hit the upper annular surface of the clamping ring; In this case, it can be particularly useful if each of the at least two screws with an external thread is passed through a respective through hole in the clamping ring or is pressed against a support area of the clamping ring. If the screws are now tightened evenly while pressing against the contact surface, the distance between the clamping ring and the nut changes as a result of the rotational movement of the screws relative to the nut. As a result, this is transferred from a first distance, which is usually different from zero, to a second distance, which is different from the first distance and is usually also different from zero. Due to this change in distance, the internal thread of the nut is shifted slightly in its seat on the crushing cone axis in relation to the external thread of the crushing cone axis in the axial direction R (i.e. by less than one pitch of the threads of the external thread of the crushing cone axis and the internal thread of the nut), so the Seat of the nut on the external thread of the breaking cone axis, so that surfaces of the threads of the internal thread of the nut are pressed in the axial direction against surfaces of the external thread of the breaking cone axis which face the surfaces of the threads of the internal thread of the nut, whereby the internal thread of the nut is pressed against the external thread the crushing cone axis is braced axially. This tension results in a tight fit of the nut on the crushing cone axis. The tightening torque that is achieved by this bracing can be generated in individual steps that are distributed over the individual screws. The several - at least two - smaller screws represent relatively "soft springs", so that one is relatively softer Can produce frictional connection. If the clamping ring is designed as a separate element, the clamping connection between the clamping ring and the crushing cone jacket is created at the same time when it is braced.

As a result of the bracing of the internal thread of the nut against the external thread of the breaking cone axis, a high total loosening torque is required to loosen the connection thus obtained, which is distributed over the individual screws screwed into the bores of the nut. The screw head diameter of these screws is chosen to be smaller than the outer diameter of the nut, so that conventional screws - such as standard screws - can be used and consequently also conventional tools can be used to tighten or loosen these screws; The use of special tools is therefore not required during assembly as well as during dismantling. When using two screws, the tightening torque (tightening torque) and the loosening torque (loosening torque) of the individual screws are halved while the clamping force of the screw connection remains the same; if more than two screws are used, the tightening torque and loosening torque are correspondingly reduced even more.

Even if the present invention can in principle be used together with potting of the elements, in addition to simple assembly and disassembly, it also offers the possibility of dispensing with the use of casting compound.

According to a further embodiment, the at least two screws and the at least two bores are at least four screws and at least four bores, preferably at least eight screws and at least eight bores, particularly preferably at least twelve screws and at least twelve bores, in the above-described cone crusher crushing cone. If there are fewer than twelve holes, the screws should have a correspondingly higher strength. It is fundamentally advantageous to realize more than twelve corresponding screw-hole pairs, provided the diameter of the nut is sufficiently large, for example fourteen corresponding screw-hole pairs or even fifteen, sixteen, twenty or even more such pairs. In this way, the tightening torque achieved by the bracing can be distributed over even more individual screws. Through this The tightening torque and the loosening torque of each screw for the individual screws are reduced even further while the clamping force of the screw connection remains the same. In addition, the tension is distributed more evenly over the entire circumference of the screw connection, so that the risk of damage to the external thread of the breaking cone axis or the internal thread of the nut as a result of undesired tilting is reduced.

According to a further embodiment, in the above-described cone crusher crushing cone, the clamping ring is arranged in the axial direction above the crushing cone jacket and has a circumferential clamping ring clamping surface, the crushing cone jacket having an upper area with a circumferential breaking cone jacket clamping surface that interacts with the circumferential clamping ring clamping surface, and the The nut alone or together with the at least two screws holds the clamping ring in such a way that the clamping ring clamping surface rests against the crushing cone jacket clamping surface and the crushing cone jacket is fixed on the crushing cone body. In the simplest case, the interaction of two clamping surfaces relates to the design and arrangement of the two clamping surfaces as complementary elements of a clamping connection which is formed when the two clamping surfaces are subjected to an (external) pressure. In the assembled state, the clamping ring clamping surface is arranged on the underside of the clamping ring and is typically designed as a ring-like support surface, while the crushing cone jacket clamping surface is arranged on an upper section of the crushing cone jacket and is typically also configured as a ring-like support surface. The clamping ring clamping surface and the crushing cone jacket clamping surface are arranged facing each other and designed to correspond, so that they serve each other as support surfaces extending around the ring-like contact area of the clamping ring and the crushing cone jacket; Usually, their contact surface with one another is designed to be as large as possible. Due to the axial contact pressure, the crushing cone shell is pressed against the mostly conical or at least partially conical seat of the crushing cone body and the crushing cone shell is thus fixed to the crushing cone body.

Even if a certain fixation of the crushing cone jacket on the crushing cone body is sometimes already achieved when the nut is loosely or hand-tightly tightened on the External thread of the crushing cone axis can be achieved, the high-strength fixation required for the operation of the cone crusher is only achieved when the internal thread of the nut is braced against the external thread of the crushing cone axis by the at least two screws, whereby the clamping ring is pressed firmly in the axial direction downwards onto the crushing cone shell will.

According to one embodiment of this embodiment of the cone crusher crushing cone, the crushing cone jacket clamping surface and the clamping ring clamping surface are each correspondingly designed as a jacket surface of a cone segment or as an annular surface. With such a radially symmetrical configuration, the clamping ring and the crushing cone jacket can be mounted in any radial positions relative to one another without prior radial alignment being necessary; If necessary, these can be adjusted afterwards after the clamping ring has been placed on the crushing cone jacket (before screwing in the screws). The conical design of the clamping surfaces as lateral surfaces of a cone segment is particularly advantageous, as the clamping ring is partially embedded in the breaking cone jacket so that the clamping ring does not contribute to the overall height of the breaking cone, which minimizes the space required by the breaking cone and makes it available for the breaking process standing area can be enlarged. In addition, as a result of the conical seat, the clamping ring and the crushing cone jacket can be automatically centered relative to one another and also relative to the central axis of the crushing cone axis during assembly. In addition, other configurations of the clamping surfaces are basically also possible, which, in addition to stepped / multi-step clamping surfaces or clamping surfaces with a gradient that changes continuously or discontinuously in the radial direction, also includes non-radially symmetrical or altogether irregular clamping surfaces, which can offer a torsional strength of the clamping ring and crushing cone jacket, or also interrupted clamping surface sections, provided that these are designed to correspond to one another and thus complementary to one another.

According to a further embodiment, in the above-described cone crusher crushing cone, the nut is arranged in the axial direction below the clamping ring and the clamping ring has through holes, the radial positions of which correspond to the positions of the holes in the nut (so that the through holes and Bores are therefore aligned one above the other and are aligned), each of the at least two screws being guided through one of the through holes into one of the bores of the nut so that below the clamping ring the internal thread of each bore interacts with the external thread of the respectively assigned screw in such a way that that when the screw is screwed into the bore, the distance between the clamping ring and the nut is reduced and the internal thread of the nut is axially braced against the external thread of the crushing cone axis. In this embodiment, the clamping ring is arranged above the nut.

In the assembled state, the nut is screwed onto the external thread of the crushing cone axis, the clamping ring being in the axial direction above the plane in which the nut is arranged. The at least two screws are guided through the through holes of the clamping ring and screwed into the bores of the nut from above. The undersides of the screw heads rest on the upper side of the clamping ring, so that the screws are usually arranged vertically or almost vertically (with a deviation of at most 15 ° from the vertical).

Since the nut is arranged in the axial direction below the clamping ring, it is necessary during assembly that the nut is first screwed onto the external thread of the breaking cone axis before the breaking cone axis is passed through the central opening of the clamping ring and the clamping ring on the upper section of the breaking cone jacket is supported. The clamping ring is positioned in such a way that the through holes of the clamping ring are aligned with the at least two bores of the nut, which each have internal threads.

When the at least two screws are screwed into the bores of the nut, the screw heads are pressed against the upper side of the clamping ring, which serves as an abutment, whereby the nut is raised slightly on the external thread of the crushing cone axis. As a result, when the screws are screwed in, the distance between the clamping ring and the nut (more precisely, between the underside of the clamping ring and the top of the nut) is reduced Screwing in the existing second distance between the clamping ring and nut is shortened. Since the nut is screwed onto the external thread of the crushing cone axis, the upper surfaces of the thread or the threads of the internal thread of the nut are pressed against the lower surfaces of the thread or the threads of the external thread of the crushing cone axis, whereby the internal thread of the nut is pressed against the external thread the crushing cone axis experiences an axial tension.

Such an arrangement has the advantage that the clamping ring, the underside of which in the assembled state is supported on the upper area of the crushing cone jacket and fixes it on the crushing cone body, forms the upper end of the crushing area of the crushing cone. Compared to the conventional crushing cone casing holder, in which the ring nut is arranged above the sliding sealing ring with a central opening, the overall height of the crushing area can be reduced, since the clamping ring does not have to protrude over the upper edge of the crusher casing.

The overall height of the crushing area can be reduced particularly efficiently if the nut is arranged in a flea space which is formed by partial areas of the outside of the crushing cone body and the crushing cone axis, the inner side of the crushing cone jacket, the underside of the clamping ring and, if necessary, partial areas of other elements. The nut is thus completely surrounded by the other components of the crushing cone and covered and shielded from the crushing space, so that this part of the crushing cone casing holder is also particularly effectively protected against mechanical and / or chemical loads from the crushed material during the crushing operation.

In the arrangement of the nut below the clamping ring, in the case of a cone crusher crushing cone, the nut can also be arranged below the clamping ring without contact with respect to the clamping ring. In this case, the second distance between the clamping ring and the nut, which is reached when the screws are screwed in, is different from zero. In this way, a particularly strong spring effect and thus tension between the external thread of the crushing cone axis and the internal thread of the central threaded hole of the nut and thus a particularly reliable hold of the crushing cone jacket on the crushing cone body can be achieved. Alternatively, it is possible that the second distance is equal to zero, so that after assembly in the clamped state, the top of the nut rests directly on the underside of the clamping ring.

According to a further embodiment, in the cone crusher crushing cone in which the nut is arranged below the clamping ring, each through hole on the top of the clamping ring has a countersink for receiving the head of the respective screw, in particular a planar countersink. Typically, the countersinks are dimensioned in such a way that the heads of the screws are completely received by them and do not protrude upwards. In this way, the mechanical stress on the screws can be reduced, which the crushed material could otherwise exert on the screw heads during operation.

Instead of arranging the nut below the clamping ring, in the case of the cone crusher breaking cone described above, the nut can also be arranged in the axial direction above the clamping ring and the clamping ring has at least two support areas on its upper side, the radial positions of which correspond to the positions of the holes in the nut correspond, the internal thread of each bore interacting with the external thread of the respectively assigned screw in such a way that when the screw is screwed into the bore, the lower section of each screw is pressed against a support area, the distance between the clamping ring and nut is increased and thereby the internal thread of the nut is axially braced against the external thread of the crushing cone axis. In this arrangement, the clamping ring is arranged below the nut.

In this arrangement, too, the crushing cone jacket is fixed on the crushing cone body by means of the clamping ring. The clamping ring is typically designed as a separate element which is supported on the upper region of the crushing cone jacket. In the assembled state, the nut is arranged above the clamping ring, the internal thread of the central opening of the nut also forming a screw connection with the external thread of the crushing cone axis. One of the at least two screws is guided through each of the at least two bores of the nut, each provided with an internal thread, and it strikes from above against the corresponding support areas on the upper side of the clamping ring. the Here, too, the screw heads are directed upwards so that they are on or near the upper side of the nut.

When the at least two screws are screwed in, the nut is raised slightly, as a result of which the internal thread of the nut is axially braced against the external thread of the crushing cone axis, which in turn causes a tight fit of the nut on the crushing cone axis. The nut is pushed away from the clamping ring when the screws are screwed in, so that the distance between the clamping ring and nut increases slightly. As a result, the clamping force that the nut exerts directly on the crushing cone shell via the clamping ring could turn out to be somewhat lower than in the arrangement in which the nut is arranged below the clamping ring and is drawn towards the clamping ring when it is screwed in. Even if the direct fixation would turn out to be somewhat less, the break cone jacket is also held on the break cone body with this arrangement, which is why it can still be used reliably for many applications, depending on the configuration of the other elements. In addition, when the screws are tightened in the area of the circumference of the nut, an annular gap can arise between the clamping ring and the nut, the size of which depends on the corresponding pitch of the external thread of the crushing cone axis and the internal thread of the opening of the nut and, with a suitable choice, no significant penetration of crushed material Allow the material to be crushed into the resulting gap.

During assembly, the crushing cone axis is inserted into the central opening of the clamping ring and the clamping ring is then supported on the upper area of the crushing cone jacket. Then the crushing cone axis is inserted into the central opening of the nut and the nut is screwed to the crushing cone axis so that the nut rests against the clamping ring; The internal thread of the central opening of the nut forms a screw connection with the external thread of the breaking cone axis. To axially brace this screw connection, the at least two screws in the at least two holes in the nut are then tightened until the screws are pressed against the corresponding support areas on the clamping ring and the screws slightly lift the nut over the internal threads in the holes in the nut, so that as a result this displacement, the internal thread of the central opening of the nut is braced relative to the external thread of the crushing cone axis. This arrangement has certain structural similarities with a conventional crushing cone casing holder, in which a nut is also arranged above the crushing cone casing and an additional washer is provided as a sliding sealing ring (burning ring). Because of these correspondences, such an arrangement is particularly suitable for retrofitting existing cone crusher crushing cones, since only the nut and the sliding sealing ring of the conventional crushing cone casing holder must be replaced by the crushing cone casing holder according to the invention with nut, clamping ring and at least two screws and the other components such as crushing cone axis, Crushing cone body and crushing cone jacket can be retained.

This arrangement is similar to an embodiment in which the nut is arranged in the axial direction above the clamping ring and not the clamping ring but the breaker cone body has at least two support areas on its upper side, the radial positions of which correspond to the positions of the holes in the nut, the internal thread Each bore cooperates with the external thread of the respectively assigned screw in such a way that when the screw is screwed into the bore, the lower section of each screw is pressed against a support area of the crushing cone body, so that the distance between the crushing cone body and nut is increased and the internal thread of the nut is thereby counteracted the external thread of the crushing cone axis is axially braced. For axial bracing, the at least two screws are then tightened in the at least two bores of the nut until the screws are pressed against the corresponding support areas on the crushing cone body. In this design, the clamping ring can either be designed as a separate element (so that the breaking cone jacket is fixed on the breaking cone body via a clamping connection between the clamping ring and breaking cone jacket) or it can be an integral part of the upper area of the breaking cone jacket (so that the breaking cone jacket is fixed on the Crushing cone body is achieved without a clamping connection between the clamping ring and the crushing cone casing).

According to a further embodiment, in the cone crusher crushing cone in which the nut is arranged above the clamping ring, each of the at least two bores on the top of the nut has a countersink for receiving the head the respective screw, in particular a flat countersink. Typically, the countersinks are dimensioned in such a way that the heads of all screws are completely received by them and do not protrude upwards. In this way, the mechanical stress on the screws, which the crushed material would otherwise exert on the screw heads during operation, can be reduced.

It is particularly advantageous if, in the case of crushing cones in which the nut is arranged above the clamping ring or below the clamping ring, each countersink has a protective cap which covers the countersink with the screw head received in it towards the top. In this way, it is possible to prevent crushed material broken up during the crushing operation, including dust arising during the crushing process, from settling and compacting in the depressions, which would make access to the heads of the screws more difficult when the screws are loosened later and an additional previous cleaning step would be required.

In addition to the components described above, the cone crusher crushing cone can of course also have other components.

Furthermore, the present invention relates to a crushing cone casing holder, in particular a crushing cone casing holder for a cone crusher crushing cone of the type described above, the crushing cone casing holder comprising a nut, a clamping ring and at least two screws, the nut having a central threaded hole with an internal thread, which is designed to interact with an external thread The crushing cone axis is set up, and has at least two bores with an internal thread, the clamping ring having a central opening and being set up to fix the crushing cone shell on the crushing cone body, in particular for fixing the crushing cone shell on the crushing cone body in a clamping connection, and each of the at least two screws is a Has external thread and each of the at least two screws is assigned to one of the at least two bores, the internal thread of each bore cooperating with the external thread of the respectively assigned screw in such a way that s as a result of a rotational movement of the at least two screws relative to the nut, the distance between the clamping ring and the nut can be converted from a first distance into a second distance which is different from the first distance. Typical configurations the breaking cone casing holder and its components have already been described above. In addition to these components, the breaking cone casing holder can of course also have other components. Such a crushing cone casing holder can also be used as a retrofit set for existing cone crushers.

Furthermore, the present invention relates to a crusher with a cone crusher crushing cone of the type described above; In addition to the components described above, the crusher can of course also have other components.

Furthermore, the present invention relates to a method for attaching a crushing cone shell to a crushing cone body for cone crusher crushing cones, the method comprising the steps:

(a) placing the crushing cone jacket on the crushing cone body, which is arranged non-rotatably and concentrically around a portion of a crushing cone axis with an external thread, so that the crushing cone jacket is supported on the crushing cone body;

(b) Tightening a nut with a central threaded hole with an internal thread and with at least two bores with an internal thread on the external thread of the crushing cone axis, so that the nut is brought into a holding position on the crushing cone axis;

(c) inserting the crushing cone axis into a central opening of a clamping ring and supporting the clamping ring on an upper region of the crushing cone jacket; and

(d) Tightening of at least two screws with external threads in the at least two bores of the nut, so that the nut is brought into a fixing position, whereby the internal thread of the nut is axially braced against the external thread of the crushing cone axis and the crushing cone jacket is fixed on the crushing cone body, in particular in a clamp connection.

For step (a), a crushing cone body is provided which is arranged non-rotatably and concentrically around a partial area of a crushing cone axis with an external thread. On the outside (lateral surface) of the crushing cone body, the inner area of the crushing cone shell, which is open at the bottom, is placed so that the The inner side of the crushing cone jacket rests at least in some areas on the outer side of the crushing cone body and is supported by it. In particular, it is the above-described cone crusher-crushing cone.

For step (b) the central threaded hole of a nut is guided over the upper section of the breaking cone axis and the nut is moved downwards in the axial direction relative to the breaking cone axis until the nut touches the area of the breaking cone axis on which the external thread of the breaking cone axis is arranged. The internal thread of the nut and the external thread of the breaking cone axis are aligned relative to one another and the nut is screwed onto the breaking cone axis until the nut has reached a holding position on the breaking cone axis, i.e. a position in which the nut is held by the breaking cone axis without the Crushing cone shell is already (largely or completely) fixed on the crushing cone body without play.

Depending on the design of the crushing cone, according to the invention, the nut can be screwed to the crushing cone axis before or after the crushing cone jacket has been put on. The former is possible when the nut is arranged below the clamping ring and the recess on the underside of the crushing cone jacket is large enough to guide the crushing cone jacket over the nut (step (b) before step (a)). If, on the other hand, the nut is arranged above the clamping ring, then the breaking cone casing must be put on and the clamping ring must be placed around the breaking cone axis before the nut is screwed (step (a) before step (b)).

For step (c), the upper section of the crushing cone axis is inserted into a central opening of a clamping ring and the clamping ring is guided downward on the crushing cone axis in the axial direction until the clamping ring touches an upper area of the crushing cone jacket and is supported on it. If the clamping ring is integrated in the upper area of the crushing cone jacket or has already been arranged on the upper area of the crushing cone jacket, then this step is carried out at the same time as the crushing cone jacket is put on (step (a)), since in this case the crushing cone axis is in the central opening of the Clamping ring is introduced while the crushing cone jacket is guided over the crushing cone axis. Are the clamping ring and If the crushing cone shell is designed as separate elements of the crushing cone, this step is usually only carried out after the crushing cone shell has been put on (step (a)).

If the nut, crushing cone casing and clamping ring are in the desired positions, then for step (d) the screws are screwed into the corresponding holes in the nut, each with an internal thread. The top of the clamping ring (its side facing upwards in the assembled state) can represent an abutment for the annular underside of the screw head if the clamping ring is arranged above the nut, or an abutment for the underside of the shaft of each screw, if the clamping ring is arranged below the nut; It can be particularly useful here if each of the at least two screws with an external thread is passed through a respective through hole in the clamping ring or is pressed against a support area of the clamping ring. When screwing in, the distance between the mutually facing sides of the nut and the clamping ring changes, so that the nut is slightly raised (or possibly also lowered) in its seat on the external thread of the crushing cone axis and brought into a fixing position, i.e. a position in which the The crushing cone shell is fixed on the crushing cone body by means of the nut over the clamping ring (largely or completely free of play). As a result, the internal thread of the nut is axially braced against the external thread of the breaking cone axis and the breaking cone jacket is fixed on the breaking cone body.

In addition to these steps, the method according to the invention can of course contain further steps. For example, the at least two screws - before they are screwed into the nut - can be inserted from above into corresponding through holes in the clamping ring so that the at least two screws then engage in the at least two holes in the nut (in any case before step (d), optionally before step (c), before step (b) or before step (a)). This step is of course only possible if the nut is arranged below the clamping ring; If the nut is arranged above the clamping ring, the screws are screwed directly into the bores of the nut from above without the screws having to be passed through through holes in the clamping ring beforehand. Furthermore, the present invention relates to a method for loosening a crushing cone shell from a crushing cone body, which is arranged non-rotatably and concentrically around a portion of a crushing cone axis with an external thread and supports the crushing cone shell, the crushing cone shell being fixed in a clamping connection on the crushing cone body by a nut with a central Threaded hole with internal thread and with at least two bores with internal thread is screwed onto the external thread of the crushing cone axis and at least two screws with external thread engage in the at least two bores of the nut and hold the nut in a fixing position, whereby the internal thread of the nut against the external thread of the crushing cone axis axially is clamped, and wherein the clamping ring is supported on an upper region of the crushing cone jacket and fixes it in a clamping connection on the crushing cone body, the method comprising the steps:

(a) Loosen the at least two screws from the holes in the nut, so that the nut is transferred from the fixing position to a holding position, whereby the axial tension of the internal thread of the nut against the external thread of the crushing cone axis is released and the clamping connection between the crushing cone casing and the crushing cone body is released ;

(b) removing the clamping ring from the top of the breaker cone shell;

(c) releasing the nut from the holding position from the crushing cone axis; and

(d) Removing the crushing cone jacket from the crushing cone body.

For step (a) a corresponding breaking cone is provided and the at least two screws in the holes of the nut are loosened. When loosening, the distance between the mutually facing sides of the nut and the clamping ring changes, so that the nut is slightly lowered (or possibly also raised) in its seat on the external thread of the crushing cone axis and is brought from the fixing position to a holding position. As a result, the axial tension of the internal thread of the nut against the external thread of the crushing cone axis is partially or completely canceled, so that the clamping connection between the crushing cone casing and the crushing cone body is released. For step (b) the clamping ring is loosened from the top of the breaking cone jacket. Step (b) can be omitted if the clamping ring forms an integral part of the breaking cone jacket. The clamping ring is always released after the screws have been loosened.

For step (c) the crushing cone jacket is removed from the crushing cone body. The breaking cone jacket is removed after loosening the screws and after loosening the clamping ring.

In addition to these steps, the method according to the invention can of course contain further steps. For example, in an arrangement in which the nut is arranged above the clamping ring, the nut is unscrewed from the external thread of the breaking cone axis before the clamping ring can be released from the breaking cone shell. The aforementioned process sequences can be supplemented and modified in accordance with the respective framework conditions through the structural design of the cone crusher in a manner known to the person skilled in the art, without deviating from the invention, as long as the aforementioned steps (a), (b), (c) and (d) can be realized.

The invention is to be described in more detail below with reference to the accompanying drawings of particularly advantageous examples without restricting the general inventive concept on which these examples are based, which also results in further advantages and possible applications. It each show schematically

1 shows different schematic detailed representations of a conventional cone crusher crushing cone (on the left as a perspective view and on the right as a sectional side view);

2 different schematic detailed representations of an embodiment of the cone crusher breaking cone according to the invention (on the left as a perspective view and on the right as a lateral sectional view); 3a shows a schematic representation of the embodiment of the cone crusher according to the invention, shown as a detailed representation in FIG. 2, as a perspective partial sectional view;

FIG. 3b shows a schematic representation of the embodiment of the illustrated in FIG. 3a cone crusher-crushing cone according to the invention as a side sectional view; 4a shows a schematic individual representation of a nut of the embodiment of the cone crusher breaking cone according to the invention shown in FIGS. 2, 3a and 3b as a top view;

FIG. 4b shows a schematic individual representation of the nut shown in FIG. 4a as a side sectional view (section along the section line A-A); and FIG. 5 shows a schematic individual illustration of a clamping ring of the embodiment of the cone crusher breaking cone according to the invention shown in FIGS. 2, 3a and 3b as a perspective view.

In Fig. 1 different schematic detailed representations of a conventional cone crusher crushing cone A1 are shown. On the left-hand side in FIG. 1, a perspective detailed view of the conventional cone crusher-crushing cone A1 is shown and on the right-hand side in FIG. 1, this detailed view is shown as a side sectional view. In the center of these representations, the breaker cone jacket holder A5 is shown, with which the breaker cone jacket A3, which is designed as a truncated flea cone, is held on the breaker cone body A2, which is designed as a truncated cone.

The breaking cone jacket holder A5 of the conventional cone crusher breaking cone A1 consists of a nut A6 with a central threaded hole, which has an internal thread, and a sliding sealing ring A8 with a central opening arranged below. The nut A6 is designed as a ring nut.

In the detail shown in FIG. 1, the outer surface of the crushing cone body A2 does not touch the inner surface of the crushing cone jacket A3, so that a gap is formed between these two; this gap is usually filled with potting compound (not shown) after the crushing cone jacket A3 has been mounted on the crushing cone body A2. Below the section shown in FIG. 1, the crushing cone jacket A3 touches the crushing cone body A2 and is thus supported on the crushing cone body A2.

The crushing cone body A2 is fastened concentrically to the area of the crushing cone axis A4 located at the bottom in the axial direction, so that the crushing cone body A2 cannot be rotated relative to the crushing cone axis A4. Above the Crushing cone jacket holder A5, the crushing cone axis A4 lies directly in the crushing space of the cone crusher and is there in contact with the crushed material, which is why the surface of the crushing cone axis A4 is provided with a wear-resistant coating there. In the section of the crushing cone axis A4 shown in the middle in FIG. 1, this has an external thread (threads not shown).

In Fig. 1, the nut A6 is screwed onto the external thread of the crushing cone axis A4, so that the internal thread of the central threaded hole of the nut A6 forms a screw connection with the external thread of the crushing cone axis A4. The nut A6 is in contact with the crushing cone jacket A3 via the sliding sealing ring A8, through which the nut A6 exerts a contact pressure on the crushing cone jacket A3 and fixes it on the crushing cone body A2. The contact surface of the sliding sealing ring A8 with the crushing cone jacket A3 and the contact surface of the sliding sealing ring A8 with the nut A6 are each conical in a ring-like manner.

The nut A6 has bores A7 in its annular surface; These are used to hold pins on a special tool that is used to tighten and loosen the A6 nut. Some of the bores A7 are designed as through holes in order to be able to fill the space between the inside of the breaking cone jacket A3 and the outside of the breaking cone body A2 with potting compound after assembly.

When assembling the crushing cone jacket A3, the crushing cone jacket A3 is guided from above over the crushing cone axis A4 and placed on the crushing cone body A2. Then the sliding sealing ring A8 is guided from above over the crushing cone axis A4 and supported on the upper ring-like surface of the crushing cone jacket A3. Finally, the nut A6 is guided from above over the crushing cone axis A4 to the external thread and screwed there with the external thread of the crushing cone axis A4 until the nut A6 touches the upper ring-like surface of the sliding sealing ring A8. To fix the crushing cone jacket A3 on the crushing cone body A2, the pins of the lever tool are now inserted into the corresponding bores A7 of the nut A6 and the nut A6 is subjected to the desired high torque; a clamp connection is established between nut A6 and sliding sealing ring A8 as well as between sliding sealing ring A8 and crushing cone jacket A3. Then the If necessary, the cavity can be filled with potting compound via the holes A7 of the nut A6. When loosening the crushing cone jacket A3, the sliding sealing ring A8 is typically destroyed with the aid of a burner, so that the nut A6 can be loosened again from the external thread of the crushing cone axis A4 with the help of the special lever tool, regardless of any deformation that occurred during operation of the crusher.

In Fig. 2 different schematic detailed representations of an embodiment of the cone crusher-crushing cone 1 according to the invention are shown. On the left side in FIG. 2 a perspective detailed view of an embodiment of the cone crusher breaking cone 1 according to the invention is shown and on the right side in FIG. 2 this detailed view is shown as a side sectional view. Also shown in the center of these representations is the crushing cone jacket holder 5, with which the crushing cone jacket 3, which is designed as a hollow truncated cone, is held on the breaking cone body 2, which is designed as a truncated cone.

3a and 3b show different schematic representations of the embodiment of the cone crusher-crushing cone 1 according to the invention, the schematic detailed representations of which are already shown in FIG. 2, the representations in FIGS. 3a and 3b not representing detailed representations, but rather show the entire cone crusher crushing cone 1. 3a shows a schematic representation of this embodiment of the cone crusher breaking cone 1 according to the invention as a perspective partial sectional view and FIG. 3b shows a schematic illustration of this embodiment of the cone crusher breaking cone according to the invention as a side sectional view.

In Fig. 4a and Fig. 4b different schematic individual representations of a nut 6 of the cone crusher breaking cone 1 according to the invention are shown, which is shown in Fig. 2, Fig. 3a and Fig. 3b. 4a shows a schematic individual illustration of this nut 6 as a top view and FIG. 4b shows a schematic illustration of this nut as a lateral sectional view along the course AA shown in FIG. 4a. 5 shows a schematic individual representation of a clamping ring 8 of the cone crusher breaking cone 1 according to the invention, which is shown in FIGS. 2, 3a and 3b, the clamping ring 8 being shown as a perspective view.

The following description of this embodiment of the cone crusher-crushing cone 1 according to the invention relates to FIGS. 2, 3a, 3b, 4a, 4b and 5.

The cone crusher crushing cone 1 has a cone-like crushing cone body 2 with a central cylindrical opening in which a crushing cone axis 4 is received, the longitudinal extension of the crushing cone axis 4 defining the axial direction R. Such a cone crusher crushing cone 1 is typically one of the main functional elements of a cone crusher.

The crushing cone axis 4 has at its lower end with respect to the axial direction R a lower partial area, at its upper end with respect to the axial direction R an upper partial area, and in the middle (or near the middle) a middle partial area. The lower part of the crushing cone axis 4 is adapted to be received in an eccentric bushing. The upper part of the crushing cone axis 4, which protrudes into the crushing space in the arrangement in the cone crusher, is provided with a highly resistant, low-abrasion cladding. At the central part of the crushing cone axis 4, the crushing cone body 2 surrounds the crushing cone axis 4 concentrically, the crushing cone body 2 being non-rotatably connected to the central part of the crushing cone axis 4. Above the central partial area, the crushing cone axis 4 has an area with an external thread, via which the crushing cone casing holder 5 is connected to the crushing cone axis 4.

The inclined outside of the crushing cone body 2 is derived from the shape of the lateral surface of a truncated cone. The crushing cone jacket 3 is arranged on the inclined outside of the crushing cone body 2. Since the crushing cone jacket 3 is exposed to high mechanical loads during operation of the cone crusher, it is made of a highly resistant, high-strength and low-abrasion material and is designed as a wear part which has to be replaced from time to time. The shape of the crushing cone jacket 3 is derived from the shape of a cone shell. On its inside, the crushing cone jacket has 3 support surfaces on which the Breaking cone jacket 3 is supported on the outside of the breaking cone body 2. Furthermore, on the inside of the crushing cone shell 3 areas are provided in which the crushing cone shell 3 does not directly touch the crushing cone body 2; Such areas can, for example, be potted with filling compound during operation or remain unfilled; As shown in FIGS. 2, 3a and 3b, the lateral surfaces of the crushing cone body 2 and of the crushing cone jacket 3 can have different opening angles in the different areas; alternatively, the lateral surfaces can also have a constant opening angle over their flea extent. The crushing cone jacket 3 has an upper area in which a circumferential, ring-like, closed surface area is formed, the crushing cone jacket clamping surface 11. In the present case, the crushing cone jacket clamping surface 11 is configured as the jacket surface of a cone segment, but other shapes are also possible here, for example the design as a ring surface, as a stepped ring surface or as another self-contained, continuous or discontinuous surface.

The crushing cone casing 3 is attached to the crushing cone body 2 by means of a crushing cone casing holder 5. In the present case, the crushing cone casing holder 5 comprises a nut 6, a clamping ring 8 and screws 9. The screws 9 are designed as conventional screws, each with a screw head and a shaft which - at least in some areas - has an external thread; In the present case the screws are 9 hexagon head screws, but all other suitable screw types can also be used.

The nut 6 has a central threaded hole which has an internal thread which corresponds to the external thread of the crushing cone axis 4; In addition, the nut 6 has bores 7 in its annular surfaces (end faces) along its circumference, each of which has an internal thread. In the circumferential direction of the nut 6, these peripheral bores 7 are in the present case evenly distributed and therefore have uniform radial spacings in the circumferential direction. Detailed representations of the nut 6 are shown in FIGS. 4a and 4b, FIG. 4b showing a section along the section line AA in FIG. 4a. With an assembled cone crusher crushing cone 1, the nut 6 is screwed onto the crushing cone axis 4 so that the central threaded hole of the nut 6 forms a screw connection with the external thread of the crushing cone axis 4, through which the position of the nut 6 is limited in the axial direction R: In the Seat of the nut 6 on the crushing cone axis 4 (and thus without rotation of the nut 6 relative to the crushing cone axis 4) the internal thread of the nut 6 compared to the external thread of the crushing cone axis 4 in the axial direction R can only slightly (i.e. by less than one pitch of the threads of the external thread the breaking cone axis 4 and the internal thread of the nut 6) are shifted, whereby the internal thread of the nut 6 is axially braced against the external thread of the breaking cone axis 4. Such a tension is achieved by means of the screws 9, which are screwed in the axial direction R from above into the bores 7 of the nut 6 and by screwing in (the rotational movement of the screws 9) the nut 6 is slightly in its seat on the external thread of the crushing cone axis 4 raise or lower.

In the arrangement shown, the nut 6 is arranged in a cavity in the assembled state, which is delimited by the outside of the crushing cone axis 4, the upper end of the crushing cone body 2, a partial area on the inside of the crushing cone jacket 3 and the underside of the clamping ring 8. The underside of the clamping ring 8 also does not touch the top of the nut 6, so that the nut 6 is arranged below the clamping ring 8 without contact with respect to the clamping ring 8 (this does not preclude the nut 6 and clamping ring 8 from being in contact with one another via other elements stand, for example via the crushing cone axis 4 or via the screws 9).

In the present case, the nut 6 is designed as a ring nut with twelve bores 7, but other configurations are also possible, for example as a polygonal nut, for example as a hexagonal nut or octagonal nut. The nut 6 shown has twelve bores, whereby the number and position of the bores 7 on the nut 6 can be selected differently depending on the requirements - in particular with large crushing cone diameters, the largest possible number of bores 7 is preferred, i.e. about ten bores, twelve bores , sixteen holes or even more holes. Typically, the bores 7 are evenly distributed in the circumferential direction, in order to evenly distribute the absorbed load and thus the load on nut 6 and screws 9 and to avoid local mechanical overstressing. However, when using a large overall number of holes 7 and screws 9, the exactly uniform distribution can also be dispensed with. In addition to the aforementioned elements, the nut 6 can also have further functional elements, for example openings or recesses for positioning and / or for handling the nut 6, these - as shown in FIGS. 4a and 4b - being designed, for example, as grooves or blind holes without internal threads could be.

The crushing cone casing holder 5 also contains the clamping ring 8, which has a central (central) opening in the axial direction R; a detailed representation of the clamping ring 8 is shown in FIG. In the assembled state, the crushing cone axis 4 is guided through the central opening of the clamping ring 8. The central opening of the clamping ring 8 has no internal thread on its inside, so that the clamping ring 8 can be guided along the crushing cone axis 4 in the axial direction R. In the present embodiment, the inner diameter of the central opening of the clamping ring 8 is smaller than the inner diameter of the central threaded hole of the nut 6; Correspondingly, the partial area of the crushing cone axis 4 on which the clamping ring 8 is arranged has a smaller outer diameter than that partial area of the crushing cone axis 4 with the external thread onto which the nut 6 is screwed. Therefore, when assembling the crushing cone casing holder 5, the nut 6 can be guided from above in the axial direction R past the partial area of the crushing cone axis 4 on which the clamping ring 8 is then to be arranged.

The clamping ring 8 is also designed like a ring and made of a high-strength, abrasion-resistant material. The clamping ring 8 has through holes 12 in its annular surfaces (end faces) along its circumference, the inner walls of which are smooth and have no internal threads. The through holes 12 are designed to receive the screws 9, so that the shaft of a screw 9 can be pushed through each through hole 12 in order to be screwed into a bore 7 of the nut 6 arranged below. the Annular surfaces on the underside of the screw heads of the screws 9 are supported above the through holes 12 on the upper side of the clamping ring 8, possibly in planar depressions 13, as shown here.

On the outside of the clamping ring 8, the ring edges are beveled, the angle of the bevel on the top of the clamping ring 8 being selected so that in the assembled state the contour of this bevel of the clamping ring 8 continues the contour of the outside of the upper area of the crushing cone jacket 3. The incline on the underside of the clamping ring 8 serves as a circumferential clamping ring clamping surface 10. The contour of the clamping ring clamping surface 10 is designed to correspond to the contour of the crushing cone jacket clamping surface 11, so that both surfaces in the assembled cone crusher crushing cone 1 rest against one another and support one another, with no empty spaces as possible or gaps are formed between these two clamping surfaces 10, 11.

Each bore 7 of the nut 6 is assigned a through hole 12 of the clamping ring 8, so that the number of bores 7 and through holes 12 correspond and the radial positions of the bores 7 in the annular surface of the nut 6 correspond to the radial positions of the through holes 12 in the clamping ring 8 and they cursed. A screw 9 is assigned to each of these hole-through-hole pairings, so that the shaft of the screw 9 can be passed through the through holes 12 of the clamping ring 8 and the external thread of the shaft of the screw 9 corresponds to the internal thread of the bore 7 of the nut 6, see above that the external thread and internal thread can form a screw connection. Furthermore, the diameter of the screw heads of the screws 9 are larger than the diameter of the through holes 12, so that the annular surfaces on the underside of the screw heads rest on the upper side of the clamping ring 8 and the screw heads are not passed through the through holes 12. In addition, the number of bores 7 and the number of through holes 12 match the number of screws 9 (it is not excluded that individual bores 7 or through holes 12 are left empty); In the present case, twelve screws 9, twelve bores 7 and twelve through-holes 12 are provided, but the number of these can also be selected differently according to the diameter of the nut 6. At the top of the clamping ring 8, the through holes 12 merge into cylindrical, planar depressions 13, the dimensions of which are selected so that they enable the screw heads of the screws 9 to be received, the screw heads not protruding upwards beyond the top of the clamping ring 8. To protect the screw heads, the depressions 13 are covered by protective caps 14 during operation of the cone crusher breaking cone 1, which cover the screw heads.

In addition to the aforementioned elements, the clamping ring 8 can also have further elements, for example openings or recesses for positioning, wherein these - as shown in FIG. 5 - can be designed, for example, as a through opening without an internal thread. With regard to the number, shape, size and radial position, such openings and recesses can be formed on the clamping ring 8 in such a way that they correspond to the corresponding openings in the nut 6.

If a screw 9 is passed from above through a through hole 12 of the clamping ring 8 and screwed (screwed) into the bore 7 of the nut 6, as this screw 9 is screwed in further - when the underside of the screw head of the screw 9 touches the top of the clamping ring 8 - The clamping ring 8 is drawn towards the nut 6, which is screwed onto the external thread of the crushing cone axis 4. Correspondingly, when the screws 9 are unscrewed (unscrewed) from the bore 7, the clamping ring 8 is released again. Accordingly, when the screw 9 is screwed in relative to the nut 6 (i.e. when the screws 9 are screwed into the nut 6), the distance between the clamping ring 8 and nut 6 changes from a first distance to a second distance, the first distance from the second distance is different. In the present case, this means that the distance between the clamping ring 8 and the nut 6 is reduced when the screw 9 is screwed in. As a result, the clamping ring 8 experiences a tensile force in the direction of the nut 6 and the nut 6 also experiences a tensile force in the direction of the clamping ring 8. As a result of the latter, the nut 6 is slightly raised in its seat on the external thread of the crushing cone axis 4, so that the internal thread of the nut 6 against the external thread the crushing cone axis 4 is axially braced. At the same time as a result of the tensile force which the clamping ring 8 experiences, the clamping ring 8 with its The clamping ring clamping surface 10 is pressed against the upper area of the crushing cone jacket 3 and thus against its crushing cone jacket clamping surface 11, so that the two clamping surfaces 10, 11 lie closely against one another and the crushing cone jacket 3 is thereby fixed on the crushing cone body 2 in a clamping connection which is entered between the crushing cone jacket 3 and the clamping ring 8 will.

When attaching the crushing cone shell 3 to the crushing cone body 2, the crushing cone shell 3 is guided with its central opening over the upper end of the crushing cone axis 4 and then placed on the crushing cone body 2, which is concentrically connected to the crushing cone axis 4, so that the crushing cone shell 3 is attached its inside is supported on the outside of the crushing cone body 2.

Before or after the crushing cone jacket 3 is placed on the crushing cone body 2, the nut 6 with its central threaded hole is guided over the upper end of the crushing cone axis 4 and in the axial direction R along the crushing cone axis 4 until the nut 6 meets the external thread of the crushing cone axis 4 achieved. Then the nut 6 is screwed to the crushing cone axis 4 until the nut 6 reaches a (preliminary) holding position on the external thread of the crushing cone axis 4.

After the crushing cone jacket 3 has been placed on the crushing cone body 2, the central opening of the clamping ring 8 is guided over the upper end of the crushing cone axis 4 and the clamping ring 8 of its clamping ring clamping surface 10 is placed on the crushing cone jacket clamping surface 11 at the upper area of the crushing cone jacket 3 and supported on the latter. If necessary, the clamping ring 8 and nut 6 are adjusted with regard to their arrangement on the crushing cone axis 4 so that the radial positions of the bores 7 of the nut 6 match those of the through holes 12 of the clamping ring 8.

The screws 9 can already be inserted into the through holes 12 of the clamping ring 8 before the clamping ring 8 is set down, or they can only be positioned there after setting down, so that the external threads of the screws 9 can then engage in the bores 7 of the nut 6. Finally, the screws 9 are screwed into the bores 7 of the nut 6 and the nut 6 is transferred from the holding position to a fixing position in which the nut 6 is slightly lifted in its seat on the external thread of the crushing cone axis 4 and the internal thread of the nut 6 against the external thread of the crushing cone axis 4 is axially braced. As a result, not only is the seat of the nut 6 fixed on the external thread of the crushing cone axis 4, but also the crushing cone jacket 3 is fixed on the crushing cone body 2 in a clamping connection. Typically, the screwing in of the screws 9 is carried out evenly crosswise.

The same procedure is followed when loosening the crushing cone shell 3 from the crushing cone body 2: The crushing cone shell 3 is supported on the crushing cone body 2, which is non-rotatably and concentrically connected to the crushing cone axis 4, and is fixed to it in the previously described clamping connection. To loosen the clamping connection, the screws 9 are unscrewed from the bores 7 of the nut 6, whereby the nut 6 is transferred from the clamped fixing position back into the holding position and the axial clamping of the internal thread of the nut 6 against the external thread of the breaking cone axis 4 is canceled. At the same time, the clamping connection between the crushing cone jacket 3 and the crushing cone body 2 is released. Typically, the screws 9 are also loosened evenly crosswise.

Then the clamping ring 8 is first removed from the top of the crushing cone jacket

3 lifted off and guided over the upper end of the crushing cone axis 4. If the inner diameter of the upper opening of the crushing cone jacket 3 is greater than the outer diameter of the nut 6, the nut 6 can now be unscrewed from the holding position from the crushing cone axis 4 and over the upper end of the crushing cone axis

4 and then the crushing cone jacket 3 is lifted off the crushing cone body 2. Particularly in the case of smaller openings in the crushing cone jacket 3, it can also be lifted off the crushing cone body 2 before the nut 6 is unscrewed and guided over the upper end of the crushing cone axis 4 and only then the nut 6 can be unscrewed from the holding position or transferred to a new holding position (if this is necessary at all when replacing the crushing cone jacket 3). The embodiment of the cone crusher breaking cone 1 according to the invention described above relates to an arrangement of the nut 6 in the axial direction R below the clamping ring 8. According to a further embodiment of the cone crusher breaking cone according to the invention, the nut can also be arranged in the axial direction above the clamping ring. A possible embodiment of this arrangement can also be explained without a separate graphic representation based on the conventional cone crusher-crushing cone A1 shown in FIG. 1: In such an arrangement, with a few exceptions, all components have the functionality shown in connection with FIG. The sliding sealing ring A8 shown in Fig. 1 is then differently designed as a clamping ring and extends beyond the inner edge of the crushing cone jacket in the radial direction almost to the crushing cone axis, this inner area of the clamping ring protruding beyond the expansion of the sliding sealing ring then either on the top of the crushing cone body can be supported or can be present as a result of this. Deviating from the representation shown in Fig. 1, the nut has at least two bores - preferably more than two bores, i.e. about eight bores, twelve bores and the like - each of the at least two bores penetrating the nut (i.e. extending over its entire fleas ) and is provided with an internal thread. A corresponding screw is screwed into each of the at least two bores from above, so that the underside of its shaft strikes the upper side of the clamping ring.

When assembling the crushing cone shell, the crushing cone shell is first guided from above over the crushing cone axis and placed on the crushing cone body. Then the clamping ring is guided with its central opening from above over the crushing cone axis until the lower clamping surface of the clamping ring rests on the upper annular surface of the crushing cone jacket. Then the nut with its central threaded hole is guided from above over the breaking cone axis to the outer thread of the breaking cone axis and then screwed onto the outer thread of the breaking cone axis until the underside of the nut rests on the upper clamping surface of the clamping ring. Finally, the at least two screws are screwed into the corresponding bores of the nut until the bottom of their shaft touches the top of the clamping ring. For axial bracing of the internal thread of the threaded hole of the nut against the external thread of the breaking cone axis, the screws are deeper into the Bores screwed in so that the underside of the shaft puts more pressure on the top of the clamping ring. The distance between the top of the clamping ring and the bottom of the nut is slightly increased so that the nut is pressed upwards in its seat on the external thread of the crushing cone axis and the axial bracing is achieved. Depending on the pitch of the external thread of the crushing cone axis, a gap can arise between the underside of the nut and the upper clamping surface of the clamping ring, whereby the axial force which is exerted on the clamping ring via the screws also fixes the breaking cone jacket in this case guaranteed on the crushing cone body by the clamping ring.

Thereafter, the interior can optionally be filled with potting compound via through openings; Of course, it is also possible to adapt the inner contour of the crushing cone shell to the outer contour of the crushing cone body so that the crushing cone shell is supported over a large area by the crushing cone body, so that the flea space between the crushing cone body and the crushing cone shell is reduced and, if necessary, a separate filling with potting compound is not necessary.

The design of the elements of such a design of the cone crusher crushing cone can take place under the aspects listed above in general or for the embodiment of the cone crusher crushing cone 1 described first. For example, the nut can have (flat) countersinks on the upper side for receiving the screw heads, which can be covered with protective caps during operation in order to prevent the screw heads from being impaired by the crushed material.

The minor structural changes compared to the conventional design show another advantage of the last two designs mentioned, namely that only a few parts need to be replaced to convert an existing cone crusher (which can be offered as a separate retrofit set) without extensive conversion measures being required.

It has been verified experimentally that the above-described cone crusher crushing cones according to the invention actually show the advantages. List of reference symbols:

A1 cone crusher crushing cone

A2 crushing cone body

A3 crushing cone jacket

A4 crushing cone axis

A5 breaker cone holder

A6 mother

A7 holes

A8 mechanical seal

1 cone crusher crushing cone

2 crushing cone bodies

3 crushing cone jacket

4 crushing cone axis

5 breaker cone holder

6 mother

7 hole

8 clamping ring

9 screw

10 clamping ring clamping surface

11 crushing cone jacket clamping surface

12 through hole

13 lowering

14 protective cap

R axial direction

Claims

Expectations

1. Cone crusher crushing cone (1) with

- a crushing cone axis (4) with external thread,

- A crushing cone body (2), which is rotatably and concentrically arranged around a partial area of the crushing cone axis (4),

- A crushing cone casing (3) which is supported on the crushing cone body (2), and

- A breaker cone holder (5), the

- A nut (6) with a central threaded hole with an internal thread, which cooperates with the external thread of the crushing cone axis (4), and

- comprises a clamping ring (8) which has a central opening and fixes the crushing cone casing (3) on the crushing cone body (2), in particular in a clamping connection, characterized in that the crushing cone casing holder (5) has at least two screws (9) with an external thread comprises and the nut (6) has at least two bores (7), of which each bore (7) has an internal thread and in each case one of the at least two screws (9) is assigned, the internal thread of each bore (7) with the external thread of the the respectively assigned screw (9) cooperates in such a way that, as a result of a rotary movement of the at least two screws (9) relative to the nut (6), the distance between the clamping ring (8) and nut (6) can be converted from a first distance to a second distance, which is different from the first distance, whereby the internal thread of the nut (6) is axially braced against the external thread of the breaking cone axis (4).

2. Cone crusher crushing cone (1) according to claim 1, wherein the at least two screws (9) and at least two bores (7) are at least four screws (9) and at least four bores (7), preferably at least eight screws (9) and at least eight bores (7), particularly preferably at least twelve screws (9) and at least twelve bores (7).

3. Cone crusher crushing cone (1) according to one of claims 1 or 2, wherein the clamping ring (8) in the axial direction (R) above the crushing cone jacket

(3) is arranged and has a circumferential clamping ring clamping surface (10), the crushing cone casing (3) having an upper region with a circumferential crushing cone casing clamping surface (11) which interacts with the surrounding clamping ring clamping surface (10), and the nut (6) alone or together with the at least two screws

(9) holds the clamping ring (8) in such a way that the clamping ring clamping surface (10) rests against the crushing cone jacket clamping surface (11) and the crushing cone jacket (3) is fixed on the crushing cone body (2).

4. cone crusher crushing cone (1) according to claim 3, wherein the crushing cone jacket clamping surface (11) and the clamping ring clamping surface

(10) are designed correspondingly in each case as a lateral surface of a conical segment or as an annular surface.

5. cone crusher crushing cone (1) according to one of claims 1 to 4, wherein the nut (6) is arranged in the axial direction (R) below the clamping ring (8) and the clamping ring (8) has through holes (12), the radial ones Positions correspond to the positions of the bores (7) of the nut (6), each of the at least two screws (9) being guided through one of the through holes (12) into one of the bores (7) of the nut (6), so that below the clamping ring (8) the internal thread of each bore (7) interacts with the external thread of the respectively assigned screw (9) in such a way that when the screw (9) is screwed into the bore (7) the distance between the clamping ring (8) and nut (6) is reduced and thereby the internal thread of the nut (6) against the external thread of the crushing cone axis

(4) is axially braced.

6. cone crusher crushing cone (1) according to claim 5, wherein the nut (6) is arranged in a cavity which is formed by portions of the outside of the crushing cone body (2) and the crushing cone axis (4), the inside of the crushing cone shell (3), the Underside of the clamping ring (8) and possibly of sub-areas of further elements is formed.

7. cone crusher crushing cone (1) according to one of claims 5 or 6, wherein the nut (6) is arranged below the clamping ring (8) without contact with respect to the clamping ring (8).

8. Cone crusher crushing cone (1) according to one of claims 5 to 7, wherein each through hole (12) on the top of the clamping ring (8) each have a countersink (13) for receiving the head of the respective screw (9).

9. Cone crusher crushing cone (1) according to one of claims 1 to 4, wherein the nut (6) is arranged in the axial direction (R) above the clamping ring (8) and the clamping ring (8) has at least two support areas on its upper side , the radial positions of which correspond to the positions of the bores (7) of the nut (6), the internal thread of each bore (7) cooperating with the external thread of the respectively assigned screw (9) in such a way that when the screw (9) is screwed into the Bore (7) the lower section of each screw (9) is pressed against a support area, the distance between the clamping ring (8) and nut (6) is increased and thereby the internal thread of the nut (6) against the external thread of the crushing cone axis (4) axially is braced.

10. Cone crusher crushing cone (1) according to claim 9, wherein each of the at least two bores (7) on the top of the nut (6) each has a countersink (13) for receiving the head of the respective screw (9).

11. Cone crusher crushing cone (1) according to one of claims 8 or 10, wherein each countersink (13) has a protective cap (14) which covers the countersink (13) with the screw head received therein towards the top.

12. crushing cone casing holder (5) in particular for a cone crusher crushing cone (1) according to one of claims 1 to 11, comprising a nut (6), a clamping ring (8) and at least two screws (9), the nut (6) being a central threaded hole with internal thread, which is designed to interact with an external thread of a crushing cone axis (4), as well as at least two bores (7) with internal thread, the clamping ring (8) having a central opening and for fixing the Breaking cone jacket (3) is set up on the breaking cone body (2), in particular for fixing the breaking cone jacket (3) on the breaking cone body (2) in a clamping connection, and each of the at least two screws (9) has an external thread and each of the at least two screws (9) one of the at least two bores (7) is assigned, the internal thread of each bore (7) cooperating with the external thread of the respectively assigned screw (9) in such a way that, as a result of a rotary movement of the at least two screws (9) relative to the nut (6) the distance between the clamping ring (8) and the nut (6) can be converted from a first distance into a second distance which is different from the first distance.

13. Crusher with a cone crusher-crushing cone (1) according to one of claims 1 to 11.

14. A method for attaching a crushing cone jacket (3) to a crushing cone body (2) comprising the steps

(a) placing the crushing cone shell (3) on the crushing cone body (2), which is rotatably fixed and concentric around a portion of a crushing cone axis (4) with an external thread, so that the crushing cone shell (3) is supported on the crushing cone body (2);

(b) Tightening a nut (6) with a central threaded hole with internal thread and with at least two bores (7) with internal thread on the external thread of the crushing cone axis (4) so that the nut (6) is brought into a holding position on the crushing cone axis (4) ;

(c) inserting the crushing cone axis (4) into a central opening of a clamping ring (8) and supporting the clamping ring (8) on an upper region of the crushing cone jacket (3); and

(d) Tightening at least two screws (9) with external threads in the at least two bores (7) of the nut (6) so that the nut (6) is brought into a fixing position, whereby the internal thread of the nut (6) against the external thread the crushing cone axis (4) axially braced and the Crushing cone jacket (3) is fixed on the crushing cone body (2), in particular in a clamp connection.

15. A method for loosening a crushing cone casing (3) from a crushing cone body (2) which is arranged non-rotatably and concentrically around a portion of a crushing cone axis (4) with an external thread and supports the crushing cone casing (3), the crushing cone casing (3) in a clamped connection is fixed on the crushing cone body (2) by screwing a nut (6) with a central threaded hole with internal thread and with at least two bores (7) with internal thread on the external thread of the crushing cone axis (4) and at least two screws (9) with external thread in the at least two bores (7) of the nut (6) engage and hold the nut (6) in a fixing position, whereby the internal thread of the nut (6) is axially braced against the external thread of the crushing cone axis (4), and the clamping ring (8 ) is supported on an upper region of the crushing cone jacket (3) and this is fixed in a clamping connection on the crushing cone body (2), the method comprising the steps

(a) Loosen the at least two screws (9) from the bores (7) of the nut (6) so that the nut (6) is transferred from the fixing position to a holding position, thereby counteracting the axial bracing of the internal thread of the nut (6) the external thread of the crushing cone axis (4) is canceled and the clamping connection between the crushing cone casing (3) and the crushing cone body (2) is released;

(b) removing the clamping ring (8) from the top of the breaking cone jacket (3);

(c) releasing the nut (6) from the holding position from the crushing cone axis (4);

(d) Removing the crushing cone jacket (3) from the crushing cone body (2).