DE102022130837A1 - Crushing jaw set for a crusher and crusher with crushing jaw set - Google Patents

Abstract

The invention relates to a crushing jaw set (50) for a crusher (1), comprising a first crushing jaw unit (52) for a first working unit (8) and a second crushing jaw unit (54), wherein a crushing chamber (9) is defined between the first and the second working unit (8, 4), wherein the first crushing jaw unit (52) comprises at least a first and a second crushing jaw (61, 62), wherein the first and the second crushing jaw (61, 62) are separated at a first jaw parting plane (BE1) which is aligned transversely to a material flow direction of the crusher (1). According to the invention, it is provided that at least the first crushing jaw (61) is formed from two or more first crushing jaw segments (72a-72h), which are each separated at a segment parting plane (SE) which is perpendicular to the first and second jaw parting plane (BE1, BE2). The invention further relates to a crusher (1) and a maintenance method.

Description

The invention relates to a crushing jaw set for a crusher, comprising a first crushing jaw unit for a first working unit of the crusher, and a second crushing jaw unit for a second working unit of the crusher, wherein a crushing space is defined between the first and the second working unit, wherein the first crushing jaw unit comprises at least a first and a second crushing jaw, and the second crushing jaw unit comprises at least a third and optionally a fourth crushing jaw, wherein the first and the second crushing jaw are separated at a first jaw parting plane that is aligned transversely to a material flow direction of the crusher, and wherein optionally the third and the fourth crushing jaw are separated at a second jaw parting plane that is aligned transversely to a material flow direction of the crusher. The invention further relates to a crusher with such a crushing jaw set. Furthermore, the invention relates to a maintenance method for a crusher.

In pressure crushing systems, in particular crushing systems with an eccentric roller as a movable crushing element or jaw crushers with a movable rocker, the stationary crushing element is usually a plurality of crushing jaws arranged one above the other, which can form a crushing jaw set in the sense of the present invention. An eccentric roller, for example, which is arranged at a distance from the stationary crushing jaws and which performs an eccentric movement with respect to an axis of the eccentric roller, through which the distance to the crushing jaws changes periodically, serves as the movable crushing element. In other types of crushers, such as a jaw crusher, a movable rocker serves as the movable crushing element. The crushing gap in this type of crushing system is defined by the distance between the outer circumference of the eccentric roller or the movable rocker and the surface of the crushing jaws facing it. Usually at least two, preferably three or more crushing jaws forming a crushing jaw set are arranged one above the other and, depending on the design, can also be arranged along an arc. Embodiments are also preferred in which the first and/or the second crushing jaw unit each comprise only one crushing jaw.

If a crushing jaw set with, for example, two or three crushing jaws is provided, then a crushing jaw, referred to herein as the "upper", with its surface facing the movable crushing element, is located further away from the movable crushing element than the next crushing jaw arranged below it, which can be referred to herein as the "lower" crushing jaw if there are a total of two crushing jaws and as the "middle" crushing jaw if there are a total of three or more crushing jaws. The material to be crushed moves from top to bottom in the direction of gravity during the crushing process, which is why the aforementioned designations were chosen. From this perspective, one crushing jaw is located at the top and one crushing jaw is located at the bottom, thus closest to the movable crushing element, and since the space between the movable and stationary crushing elements, which acts as a crushing gap, continuously tapers, the crushing gap is narrower in the area of the crushing jaw(s) located further down than in the crushing jaw(s) located further up. This means that during the crushing process, the crushing jaw or jaws where the crushing gap is narrower are subjected to more intensive mechanical stress than the crushing jaw or jaws where the crushing gap is wider. In other words, crushing jaws located further up are subjected to less stress and crushing jaws located further down, which are located where the crushing gap narrows, are subjected to greater stress. This means that the lower crushing jaw(s) are subject to greater wear than the upper crushing jaw(s).

During a maintenance measure, when the wear limit of the lower crushing jaw is reached, it is now possible to either replace all the crushing jaws in a crushing jaw set at the same time, or alternatively, the crushing jaws could be replaced one after the other during several maintenance measures, i.e. only one crushing jaw is replaced when it has reached its individual wear limit. The first variant has the disadvantage that material is disposed of from crushing jaws (the upper crushing jaws) that are not yet worn out and could in principle still be used. The second variant has the disadvantage that more frequent maintenance interruptions are necessary, which leads to a high level of production downtime and the resulting loss of production. Alternatively, it would be possible to exchange two crushing jaws that are worn to different degrees, but this would also lead to the system coming to a standstill. This problem is addressed, for example, by EN 10 2019 204 836 B3 .

Another problem today is that the size of crushers is increasing. Medium crusher sizes now range from around 600 to 1000 t per hour, but large machines for over 8000 t per hour are also available. The larger the crusher, the larger the crushing jaws must be in order to be able to process such volumes of primary feed material.

An object of the present invention is therefore to provide a crushing jaw set for a crusher as well as a crusher and a maintenance method which are improved with respect to wear, material usage, production and/or maintenance.

The invention solves the problem in a first aspect by a crushing jaw set of the type mentioned at the outset, wherein at least the first crushing jaw is formed from two or more first crushing jaw segments, each of which is separated at a segment division plane that is perpendicular to the first jaw division plane. The first jaw division plane is a division plane between the above-mentioned upper, middle and lower crushing jaws and is arranged parallel to the axis of rotation of the roller, for example in an eccentric roller crusher. In a jaw crusher, the first jaw division plane is parallel to the pivot or rotation axis of the movable crushing element, which in the case of a jaw crusher is a movable rocker. The segment division plane or segment division planes are perpendicular to the first jaw division plane and thus, for example, perpendicular to the axis of rotation of the roller of the eccentric roller crusher or perpendicular to the pivot axis or rotation axis of the movable crushing element of a jaw crusher. Typically, the first crushing jaw is segmented in the vertical direction and is made up of two or more first crushing jaw segments. Depending on the type of crusher, the second crushing jaw unit can also comprise at least one fourth crushing jaw in addition to the third crushing jaw, with the third and fourth crushing jaws then preferably being separated at a second jaw division plane that is aligned transversely to the material flow direction of the crusher. The second jaw division plane is therefore preferably parallel to the first jaw division plane.

The invention is therefore based on the knowledge that this segmentation brings with it a number of advantages. Firstly, the segmentation of the crushing jaw in a vertical direction, i.e. the segment division plane runs in a vertical direction, makes it much easier to produce the crushing jaw segments by casting. The individual crushing jaw segments are smaller and have a smaller volume than the non-segmented crushing jaw, which makes casting easier. Problems such as cavities or defects occur more frequently with large cast parts, as do residual stresses. This is remedied by segmenting the crushing jaw in a vertical direction. Furthermore, the casting of large components made of special materials is particularly problematic and associated with high costs. This problem is also at least partially improved by the crushing jaw segments. For example, the segmentation of the crushing jaw into the first crushing jaw segments enables the provision of crushing jaw segments made of different materials, whereby in particular the parts of the crushing jaw that are particularly affected by wear can be made of stronger materials and/or special materials, while the sections that are less susceptible to wear can be made of conventional steel. Finally, handling, logistics and storage are also simplified. Large crushing elements are also significantly more complex to handle due to their weight and dimensions. This is also improved by the crushing jaw segments according to the invention.

The first crushing jaw is preferably formed from at least three, preferably six crushing jaw segments. Other numbers are also preferred. According to the invention, at least two crushing jaw segments are provided, but four, five, six, seven, eight, nine, ten or more crushing jaw segments can also be provided. The crushing jaw segments are preferably identically designed, or there are two, three or more classes of crushing jaw segments, each comprising at least two crushing jaw segments that are identically designed. It can also be provided that crushing jaw segments on the side edges are designed separately and are not identical, while at least two crushing jaw segments arranged between the edge crushing jaw segments are identically designed. In this way, production can be further simplified and the same parts can be used. In addition, it is possible to replace only individual crushing jaw segments and not to replace the entire crushing jaw when it is worn.

The first crushing jaw segments further preferably have a cuboid basic shape and a ratio of the longest side to the shortest side is preferably in a range of 1:2 to 1:10. This achieves a shape that is advantageous both for casting and for subsequent handling and storage, which can significantly simplify these processes. Subranges within the range mentioned are also preferred, such as 1:2 to 1:9, 1:2 to 1:8, 1:2 to 1:7, 1:2 to 1:6, 1:2 to 1:5, 1:3 to 1:9, 1:4 to 1:9, 1:5 to 1:9, 1:6 to 1:9. More preferably, the lower limit of the range may take any of the values 1:2, 1:3, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, while the upper limit may take any of the values 1:3, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9; 1:10.

In a preferred embodiment, at least one of the crushing jaw segments is made of a first material and at least one of the crushing jaw segments is made of a second material which is different from the first material. For example, one or more crushing jaw segments in a central region are made of a more wear-resistant material than crushing jaw segments in an edge region. The term wear resistance corresponds to the wear resistance according to DIN50320 , that is, the resistance of a solid body to wear, for example abrasion. For example, the first material, which is preferably a wear-resistant material, is a metal matrix composite material. Preferred materials include, for example, manganese high-strength steel, Cr-Mo steels, high-chromium steels, metal matrix composite materials, or rolled wear-resistant steels, e.g. Hardox® from SSAB AB, Sweden.

Furthermore, it is also conceivable that one or more of the crushing jaw segments are provided with an inlay according to EN 10 2019 204 836 B3 so that the remaining jaw segments can be made of conventional steel. In this way, costs can be further reduced and recycling is also simplified.

In a preferred development, the first crushing jaw segments each have at least one through-opening for receiving at least one mounting rod, wherein the through-openings are aligned with one another when the first crushing jaw segments are in the assembled state. The mounting rod can be guided through the through-opening and secured on both sides, for example with a nut or another fastening means. This means that the crushing jaw segments, which together form a first crushing jaw, can also be transported and stored together if desired. In particular, assembly can be simplified as a result, since all crushing jaw segments can be arranged together and already correctly positioned in relation to one another on the corresponding holder of the crusher. It can also be provided that two or more through-openings are provided per crushing jaw segment and/or two or more mounting rods.

Preferably, two or more of the first crushing jaw segments have at least one lateral contact projection with a contact surface for mutual contact and abutment of adjacent crushing jaw segments. Preferably, the adjacent crushing jaw segments also have such lateral contact projections on their contact surfaces. The edge-positioned crushing jaw segments do not necessarily need such contact projections on their outer sides, but it can be advantageous to also equip the edge-positioned crushing jaw segments with such lateral contact projections. This makes it possible in particular to use the same parts, which can further reduce costs. If the first crushing jaw segments are designed as a cast part, it is preferred that the contact projection or projections are designed as a sprue piece. The contact surface is preferably machined. Forming the contact projections by means of cast pieces offers casting advantages, particularly in mold making. Only the projecting end faces of the contact projections, which are then also used as contact surfaces, are machined in this case, preferably by machining, in order to produce a defined contact surface. It has been found that the crushing jaw segments are deformed during operation of the crusher, so that they expand laterally and flatten in the axial direction. The contact projections allow this lateral expansion in that the crushing jaw segments do not lie against each other over their entire surface, but only on the contact surfaces. The contact surfaces preferably take up an area proportion of < 30% of the lateral surface, preferably < 20%, more preferably < 15%, more preferably < 10%. According to a preferred embodiment, it is provided that at least the first crushing jaw segments provided at the lateral ends of the first and second crushing jaws are provided with form-locking elements for laterally holding the first crushing jaw segments. The first crushing jaw segments provided at the lateral ends of the first crushing jaw are the crushing jaw segments located on the edge in the axial direction. At least on these, form-locking elements are preferably provided, which hold the crushing jaw segments at horizontal axial ends of the crushing jaw. The form-locking elements can be designed, for example, as recesses, undercuts, projections, grooves or the like. Preferably, the corresponding crusher-side mount, such as a rocker or stationary crusher element, has corresponding form-locking elements so that the crusher jaw segments can be held in a form-locking manner. The form-locking elements on the crusher-side mount are also intended to absorb lateral forces caused by the deformation of the crusher jaw segments during the crushing process.

While the invention has been described with reference to the first crushing jaw, it should be understood that in preferred embodiments, the second, the third and/or a fourth crushing jaw can also be formed from two or more second, third and fourth crushing jaw segments. These crushing jaw segments are also preferably separated at a segment dividing plane that is perpendicular to the first and second Jaw division plane. It can also be provided that all crushing jaws of a crusher are segmented in the manner according to the invention.

In a second aspect of the invention, the object mentioned at the outset is achieved by a crusher for crushing rock, with a first working unit equipped with a first crushing jaw unit and a second working unit equipped with a second crushing jaw unit, wherein a crushing space is defined between the first and the second working unit, wherein the first crushing jaw unit comprises at least a first and a second crushing jaw, and the second crushing jaw unit comprises at least a third and optionally a fourth crushing jaw, wherein the first and the second crushing jaw are separated at a first jaw parting plane that is aligned transversely to a material flow direction of the crusher, and wherein the third and the optional fourth crushing jaw are separated at an optional second jaw parting plane that is aligned transversely to a material flow direction of the crusher, wherein at least the first crushing jaw is formed from two or more first crushing jaw segments, each of which is separated at a segment parting plane that is perpendicular to the first and second jaw parting plane. It is to be understood that the jaw set according to the first aspect of the invention and the crusher according to the second aspect of the invention have the same and similar sub-aspects as particularly set out in the dependent claims. In particular, the crusher according to the second aspect of the invention comprises a jaw set according to the first aspect of the invention, so that reference is made in full to the above description.

In a preferred development of the crusher according to the second aspect of the invention, the second, third and/or fourth crushing jaws are also formed from two or more second, third and fourth crushing jaw segments, respectively, which are each separated at a segment parting plane which is perpendicular to the first and second jaw parting planes.

Preferably, the first working unit is essentially stationary during operation of the crusher and the second working unit carries out an oscillating crushing movement during operation of the crusher. The first working unit can be designed, for example, as a rocker and the second working unit as an eccentric roller if the crusher is designed as an eccentric roller crusher. If the crusher is designed as a jaw crusher, the first working unit is preferably a stationary support structure or a stationary crusher element and the second working unit is a movable crusher element, preferably a movable jaw crusher rocker.

In a third aspect of the invention, the object mentioned at the outset is achieved by a maintenance method for servicing a crusher according to one of the above preferred embodiments of a crusher according to the second aspect of the invention, comprising the steps of: dismantling one or more of the first crusher jaw segments of the crusher; providing replacement crusher jaw segments to replace the dismantled first crusher jaw segments; and assembling the replacement crusher jaw segments. The steps can be carried out partly in parallel or one after the other. Preferably, the maintenance method also comprises the step of: coupling the one or more first crusher jaw segments before dismantling. The provision preferably comprises providing mechanically coupled replacement crusher jaw segments and assembling the mechanically coupled replacement crusher jaw segments and then mechanically decoupling the replacement crusher jaw segments. The mechanical coupling of the first crusher jaw segments or the replacement crusher jaw segments can be implemented, for example, by means of a rod that is guided through through openings in the crusher jaw segments.

It is to be understood that the method according to the third aspect of the invention, the crushing jaw set according to the first aspect of the invention and the crusher according to the second aspect of the invention have the same and similar sub-aspects as particularly set out in the dependent claims. In this respect, reference is made in full to the above description.

Embodiments of the invention are now described below with reference to the drawings. These are not necessarily intended to show the embodiments to scale; rather, the drawings are schematic and/or slightly distorted if this is useful for explanation. With regard to additions to the teachings immediately apparent from the drawings, reference is made to the relevant prior art. It should be noted that a wide variety of modifications and changes can be made to the shape and detail of an embodiment without deviating from the general idea of the invention. The features of the invention disclosed in the description, in the drawings and in the claims can be essential for the development of the invention both individually and in any combination. In addition, all combinations of at least two of the features disclosed in the description, the drawings and/or the claims. The general idea of the invention is not limited to the exact form or detail of the preferred embodiments shown and described below or limited to an object that would be limited compared to the object claimed in the claims. In the case of specified dimension ranges, values within the stated limits should also be disclosed as limit values and can be used and claimed as desired. For the sake of simplicity, the same reference numerals are used below for identical or similar parts or parts with identical or similar functions.

• 1 eine Schnittansicht eines Brechers in einem ersten Ausführungsbeispiel;
• 2 eine perspektivische Ansicht eines Brechbackensatzes gemäß dem Stand der Technik;
• 3 eine perspektivische Ansicht eines Brechbackensatzes gemäß der Erfindung;
• 4 eine perspektivische Ansicht der ersten Brechbacke gemäß der Erfindung;
• 5 eine perspektivische Ansicht eines Brechbackensegments;
• 6 eine Seitenansicht eines Brechbackensegments in einer zweiten Ausführungsform;
• 7 eine Rückansicht der ersten Brechbacke gemäß 4; und in
• 8 eine perspektivische Ansicht einer ersten Arbeitseinheit ohne erste Brechbacke.

Further advantages, features and details of the invention will become apparent from the following description of the preferred embodiments and from the drawings, which show in:

• 1 a sectional view of a crusher in a first embodiment;
• 2 a perspective view of a jaw set according to the prior art;
• 3 a perspective view of a jaw set according to the invention;
• 4 a perspective view of the first crushing jaw according to the invention;
• 5 a perspective view of a jaw segment;
• 6 a side view of a crushing jaw segment in a second embodiment;
• 7 a rear view of the first crushing jaw according to 4 ; and in
• 8th a perspective view of a first working unit without the first breaking jaw.

In 1 An eccentric roller crusher 1, also called an ERC, is shown as an example of a crusher. It comprises a machine frame 2, a rotatable roller 4, which here forms a second working unit, a first working unit 8, here designed as a swing arm 8, which is mounted on a swing arm axis 6 on the machine frame 2, a crushing chamber 9 between roller 4 and swing arm 8, and a screening chamber 7, below a screening device 40. At the lower end of the crushing chamber 9, a crushing gap BS is formed between swing arm 8 and roller 4, which defines the smallest distance between roller 4 and swing arm 8. During operation, roller 4 rotates about an axis of rotation 5, with roller 4 being designed here with an eccentricity so that roller body 4 rotates eccentrically about axis of rotation 5. When the roller 4 rotates eccentrically, the distance between the roller 4 and the rocker 8 changes so that the material to be crushed, which is fed into the crushing chamber 9, can be crushed. The rocker 8 can also be referred to as the first working unit or stationary crusher element, and the roller 4 as the second working unit or movable crusher element.

The swing arm 8 is provided with a swing arm adjustment device 10, which, as shown in WO 2014/067882 A2 known. Specifically, the swing arm adjustment device 10 comprises a swing arm wedge 12, which is arranged in a gap between a contact surface 13 formed on the rear side of the swing arm and a counter surface 15 assigned to a swing arm abutment 14. The swing arm wedge 12 can be positioned within the gap with a swing arm wedge drive 16 of the swing arm adjustment device 10 in order to change the distance between the swing arm 8 and the roller 4 and thus the effective crushing gap BS. When the swing arm wedge 12 is moved with respect to 2 is moved downwards, the distance between roller 4 and rocker 8 increases. If, on the other hand, the rocker wedge 12 is moved upwards, the crushing gap BS between roller 4 and rocker 8 decreases.

The swing wedge 12, the contact surface 13 and the counter surface 15 are aligned with one another in such a way that the swing wedge 12 is forced downwards by the forces acting on the swing 8. The geometry of the contact surface 13, the counter surface 15 and the swing wedge 12 is selected in such a way that the swing wedge 12 is not self-locking, i.e. no self-locking occurs. In particular, the swing wedge 12 can be designed to move downwards automatically after being uncoupled from the swing wedge drive 16. The counter surface 15 is formed on a counter holder 17, which forms a fixed bearing, but is arranged so as to be rotatable about the abutment 14, which is designed as an axle journal. In this way, the counter surface 15 can rotate about the abutment 14 when the swing wedge 12 is adjusted. This takes into account the fact that the swing arm 8 rotates about the swing arm axis 6 when the swing arm wedge 12 is adjusted.

In the example shown here ( 1 ), the swing wedge drive 16 comprises, for example, a hydraulic or pneumatic drive 18, with a hydraulic or pneumatic cylinder 19, which is firmly connected to the swing 8, and a hydraulic or pneumatic piston 20, which is articulated to the swing wedge 12. By applying hydraulic or pneumatic pressure inside the hydraulic or pneumatic cylinder 19, the hydraulic or pneumatic piston 20 can be moved up or down with respect to 1 be moved to adjust the swing arm wedge 12. However, other Drive types are conceivable and preferred, such as a spindle drive, an electromechanical or electromagnetic drive, a purely mechanical preload by means of a spring and/or a weight. Further examples can also be found in the disclosure of EN 10 2022 125 159 the disclosure of which is intended to be fully incorporated herein.

The swing arm adjustment device 10 also includes a swing arm overload protection 22, which here includes a pressure relief valve 23, such that hydraulic or pneumatic fluid can be released from the pressure relief valve 23 when the swing arm 8 is overloaded in order to move the swing arm wedge 12 into a lower position and thus expand the crushing gap BS. Alternatively or additionally, the pressure relief valve 23 can also be actively opened, for example based on a signal that is generated based on a load determination on one or more of the supporting parts of the eccentric roller crusher 1.

Overload protection can also be provided on the roller 4. For example, it is conceivable that the roller 4 is slidably mounted and pre-tensioned with one or more springs, as also shown in EN 10 2022 125 159 described to which reference is made.

In 1 it can also be seen that a screening device 40 is provided above the roller 4, which can be supported on the one hand on a stationary abutment 42 on the machine frame 2 and on the other hand on a support surface of the roller 4 and/or on the machine frame 2. An eccentric rotation of the roller 4 thus causes a shaking movement on the support surface between the screening device 40 and the roller 4. The screening device 40 can also rotate about the abutment 42 so that the screening device 40 can compensate for an eccentric rotation of the roller 4. The screening device 40 is designed so that crushed material below a predetermined size falls through the screen and with respect to 1 can be guided past the roller 4 to the left, that is, does not enter the crushing chamber 9. Only crushed material with a size above the predetermined size is fed to the crushing chamber 9. The screening device 40 is preferably designed in accordance with WO 2014/067867 and can have one or all of the features of the screening device described therein. In particular, it can be provided that the screening device 2 comprises a finger screen, and/or sliding shoes are provided and/or elastic damping elements, and/or rubber buffers.

The eccentric roller crusher 1 also has a guide element 44 which is separate from the rocker 8 and which is attached to the machine frame or housing 2. The guide element 44 is separate from the rocker 8 and stationary and does not move together with the rocker 8, neither when adjusting the crushing gap BS nor during any overload compensation movement of the rocker 8. The guide element 44 is preferably in accordance with WO 2014/067858 A1 and has one or all features of the guide element according to WO 2014/067858 A1 on.

The crusher 1, here an eccentric roller crusher 1, is equipped with a crushing jaw set 50, which here has a first crushing jaw unit 52, which is arranged on the rocker 8 and the optional guide element 44, and a second crushing jaw unit 54, which is provided on the roller 4. Together, the first and second crushing jaw units 52, 54 form the crushing jaw set, which can also comprise further crushing jaw units in addition to the first and second crushing jaw units 52, 54. There can also be embodiments in which the crushing jaw set 50 has only a first crushing jaw unit, or first and second crushing jaw units are both provided on the rocker 8 or both on the roller 4 or both on other elements of a crusher not shown here. The first crushing jaw unit 52 comprises in the embodiment shown here a first crushing jaw 61 and a second crushing jaw 62. The second crushing jaw unit 54 comprises in the embodiment shown here at least a third crushing jaw 63 and a fourth crushing jaw 64, wherein 1 shows that in addition to the third and fourth crushing jaws 63, 64, a fifth to eighth crushing jaw (in 1 not provided with reference numerals), the third to eighth crushing jaws being designed in accordance with the 1 shown embodiment are arranged in a circle around the circumference of the roller 4, which defines the second working unit. On the rocker 8, which defines the first working unit, only the first and the second crushing jaw are provided, with a guide element crushing jaw 65 being arranged on the rocker side of the crushing chamber 9 by the guide element 44, which can be part of the first crushing jaw unit 52. As can be seen from 1 , the crushing chamber 9 tapers downwards towards the crushing gap BS, so that wear is highest at the lower end in the region of the crushing gap and lowest at the entrance area of the crushing chamber 9.

The first and second crushing jaws 61, 62 are arranged on a first jaw division plane BE1 (see also 3 ) separated, which with reference to 1 perpendicular to the plane of the drawing and thus parallel to the axis of rotation of the roller 5 and the swing axis 6. A material flow direction is with reference to 1 from top to bottom along the sickle-shaped crushing chamber 9, so that the material flow direction with respect to 1 lies within the drawing plane. The first jaw division plane BE1 is therefore also perpendicular to the material flow direction of the crusher 1. The third and fourth crusher jaws 63, 64 are separated at a second jaw division plane BE2, which is parallel to the first jaw division plane BE1, and thus also transverse to the material flow direction of the crusher 1.

In other embodiments of the crusher 1, for example as a jaw crusher, such as in particular crank-joint crushers and pendulum-joint crushers, the crushing chamber 9 may also not be sickle-shaped, but for example funnel-shaped, and the number of crushing jaws per crushing jaw unit may differ from the embodiment shown here ( 1 ). In this respect, the design of the crusher as an eccentric roller crusher is only optional and only an example.

In 2 the rocker 8 together with the first crushing jaw unit 52 is shown in perspective so that the first jaw division plane BE1 can be seen better. The second crushing jaw 62 is profiled here with a total of five vertical grooves that run in the direction of material flow and have a positive effect on the material flow. The first crushing jaw 61 is wave-shaped in profile (see also 1 ), so that it thickens somewhat in the area of the crushing gap BS towards the roller 4. This is advantageous in terms of wear, since the thickened area of the first crushing jaw 61 in particular is particularly affected by wear. The first and second crushing jaws 61, 62 are attached to a swing frame 70, as is known in the prior art.

3 now shows a first crushing jaw unit 52 according to the invention with a first crushing jaw 61 and a second crushing jaw 62, which are separated at the first jaw division plane BE1.

The first crushing jaw 61 is in 3 formed from several, namely a total of eight first crushing jaw segments 72a-72h (also designated as 72 in total), each of which is connected to a segment division plane SE (in 3 provided with reference symbols only once as an example). The segment division plane E is perpendicular to the first jaw division plane BE1 and thus also to the second jaw division plane BE2. The first crushing jaw 61 with the first crushing jaw segments 72 is enlarged in 4 The individual first crushing jaw segments 72a-72h lie against each other with their long sides and are each separated at the segment division plane SE. The individual crushing jaw segments 72a-72h are completely separated and can, as in 4 shown, are completely separated. They are individual components and are 4 In the example shown, they are only held together by a mounting rod 74 which is guided through a through-opening 76 of the crushing jaw segments 72 (cf. 5 and 6 ). The through openings 76 are aligned with one another in the assembled state so that the mounting rod 74 can be guided through them, and are arranged in an upper section with respect to an assembled state of the first crushing jaw 61 so that the crushing jaw segments 72 can hang on the mounting rod 74. The mounting rod 74 can be adapted to the through openings 76 in such a way that an alignment and/or centering of the crushing jaw segments 72 with respect to one another is achieved. The mounting rod 74 is provided here at axial ends with first and second handling elements which can be fastened to the mounting rod 74, for example by a screw connection, or can be secured to it with separate nuts. The handling elements 78a, 78b serve to enable the first crushing jaw 61 to be lifted and positioned, for example by means of a crane or the like.

The crushing jaw segments 72 are in particular cuboid-shaped or have a cuboid-shaped basic shape with a length L and a width B. A ratio of length L to width B is preferably a ratio of 2:1 to 10:1 and in the 5 In the specific example shown, the ratio is approximately 8:1. 5 the crushing jaw segment 72 is equipped with an unprofiled and flat surface facing the crushing chamber 9, while 6 shows a variant in which the surface 80 facing the crushing chamber is profiled, here wave-shaped.

For example, the crushing jaw segment 72 is designed as a cast part. It preferably has at least one, preferably as in 5 shown three contact projections 81, 82, 83, which rest against corresponding lateral contact projections of the adjacent crushing jaw segment 72. The contact projections 81-83 can be designed as sprues, for example. They preferably rise a few millimeters from the side surface, so that a lateral growth of the crushing jaw segments 72 is permitted, which can occur due to deformation during operation. The contact projections 81-83 are preferably machined, for example machined, in order to form flat, uniform and dimensionally stable contact surfaces. Preferably, the contact projections 81-83 are distributed over the length L and, for example, as in 5 shown at the top, bottom and middle. Of course, it can also be provided It may be that the entire side surface is machined, or that a larger number of contact projections, for example four, five or six, are provided.

On the back (cf. 7 ), the first jaw segments 72 are preferably provided with a cross-shaped profile, or another profile, to define recesses into which certain holding devices of the swing frame 70 ( 8th ) can engage. The fastening of the first crushing jaw 61 to the swing frame 70 should be as possible as in the prior art, if possible without significant changes, so that as few modifications as possible have to be made to the swing frame 70.

In order to support the jaw segments 72a-72h laterally, in the embodiment shown here the edge jaw segments 72a and 72h each have a recess 84a, 84h, which function as a form-locking element. Corresponding form-locking elements 86a, 86b are provided on the swing frame 70, which are designed here as projections (cf. 8th ). The projections 86a, 86b serve to fix the crushing jaw segments 72 laterally and prevent them from moving sideways during operation.

Even if only one crushing jaw 61 was described above, it should be understood that the other crushing jaws 62, 63, 64, 65 can also be designed in segments. The designations first, second, third, fourth, etc. crushing jaw are also not limited to their position, so that the first crushing jaw 61 does not necessarily have to be the lowest of the rocker 8, but could also be the uppermost or another one. In this respect, the designation "first crushing jaw 61" is only to be understood generically. Even if the above embodiment was only described in relation to an eccentric roller crusher, it should be understood that an identical design is also conceivable and preferred for other types of crushers, in particular a jaw crusher.

List of reference symbols (part of the description)

1

Crushers, eccentric roller crushers

2

Machine frame

4

second working unit, roller

5

Axis of rotation of the roller

6

Swing arm axle

7

Screening room

8th

first working unit, swing arm

9

Crushing room

10

Swing arm adjustment device

12

Swing wedge

13

Contact surface on rear of swing arm

14

Abutment

15

Counter surface

16

Swing wedge drive

17

Swing counter element

18

Hydraulic or pneumatic drive

19

Hydraulic or pneumatic cylinders

20

Hydraulic or pneumatic piston

22

Swing overload protection

23

Pressure relief valve

40

Sieving device

42

fixed abutment

44

Guide element

50

Breaking jaw set

52

first crushing jaw unit

54

second crushing jaw unit

61

first jaw

62

second jaw

63

third jaw

64

fourth jaw

65

Guide element crushing jaw

70

Swing frame

72

first crushing jaw segments

74

Mounting rod

76

Passage opening

78a, 78b

Handling elements

80

surface

81-83

Contact projections

84a, 84h

Form-locking elements, recesses

86a, 86b

Form-locking elements, projections

BS

Crushing gap

BE1

first jaw division level

BE2

second jaw division level

B

short side of the crushing jaw segment

L

long side of the jaw segment

SE

Segment division level

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions.

Cited patent literature

• DE 102019204836 B3 [0004, 0012]
• WO 2014/067882 A2 [0024]
• EN 102022125159 [0026, 0028]
• WO 2014/067867 [0029]
• WO 2014/067858 A1 [0030]

Cited non-patent literature

• DIN50320 [0011]

Claims (16)

Crushing jaw set (50) for a crusher (1), comprising a first crushing jaw unit (52) for a first working unit (8) of the crusher (1), and a second crushing jaw unit (54) for a second working unit (4) of the crusher (1), wherein a crushing chamber (9) is defined between the first and the second working unit (8, 4), wherein the first crushing jaw unit (52) comprises at least a first crushing jaw (61) and a second crushing jaw (62), and the second crushing jaw unit (54) comprises at least a third crushing jaw (63), wherein the first and the second crushing jaw (61, 62) are separated at a first jaw division plane (BE1) which is aligned transversely to a material flow direction of the crusher (1), characterized in that at least the first crushing jaw (61) is formed from two or more first crushing jaw segments (72a-72h), which are each separated at a segment division plane (SE). which is perpendicular to the first (BE1). Breaking jaw set according to Claim 1 , wherein the first crushing jaw (61) is formed from at least three crushing jaw segments (72a-72h). Breaking jaw set according to Claim 1 or 2 , wherein the first crushing jaw segments (72a-72h) have a cuboid basic shape, and wherein a ratio of the longest side (L) to the shortest side (B) is in a range of 1:2 to 1:10. A crushing jaw set according to any preceding claim, wherein at least one of the crushing jaw segments (72a-72h) is formed from a first material and at least one of the crushing jaw segments (72a-72h) is formed from a second material which is different from the first material. Breaking jaw set according to Claim 4 , wherein one or more jaw segments (72a-72h) in a central region are formed from a more wear-resistant material than jaw segments (72a-72h) in an edge region. Crushing jaw set according to one of the preceding claims, wherein the first crushing jaw segments (72a-72h) each have a through opening (76) for receiving a mounting rod (74), wherein the through openings (76) are aligned with one another in an assembled state of the first crushing jaw segments (72a-72h). A crushing jaw set according to any preceding claim, wherein two or more of the first crushing jaw segments (72a-72h) have at least one lateral contact projection (81-83) with a contact surface for mutual contacting and abutting adjacent crushing jaw segments (72a-72h). Breaking jaw set according to Claim 7 , wherein the first crushing jaw segments (72a-72h) are formed as a cast part, wherein the contact projection (81-83) is formed as a sprue piece and the contact surface is machined. Crushing jaw set according to one of the preceding claims, wherein at least the first crushing jaw segments (72a-72h) provided at lateral ends of the first crushing jaw (61) are provided with form-locking elements (84a, 84h) for laterally holding the first crushing jaw segments (72a-72h). Crushing jaw set according to one of the preceding claims, wherein the second and/or the third crushing jaw (62, 63) is formed from two or more second and third crushing jaw segments, respectively, which are each separated at a segment parting plane (SE) which is perpendicular to the first jaw parting plane (BE1). Crusher (1) for crushing rock, with a first working unit (8) equipped with a first crushing jaw unit (52) and a second working unit (4) equipped with a second crushing jaw unit (54), wherein a crushing chamber (9) is defined between the first and the second working unit (4, 8), wherein the first crushing jaw unit (52) comprises at least a first crushing jaw (61) and a second crushing jaw (62), and the second crushing jaw unit (54) comprises at least a third crushing jaw (63), wherein the first and the second crushing jaw (61, 62) are separated at a first jaw parting plane (BE1) which is aligned transversely to a material flow direction of the crusher (1), characterized in that at least the first crushing jaw (61) is formed from two or more first crushing jaw segments (72a-72h), which are each separated at a segment parting plane (SE) which is perpendicular to the first Jaw parting plane (BE1). Crusher after Claim 11 , wherein the second and/or the third crushing jaw (62, 63) is formed from two or more second and third crushing jaw segments, respectively, which are each separated at a segment parting plane (SE) which is perpendicular to the first jaw parting plane (BE1). Crusher after Claim 11 or 12 , wherein the first working unit (8) is substantially fixed during operation of the crusher (1) and the second working unit (4) performs an oscillating crushing movement during operation of the crusher (1). Crusher after Claim 13 , which is designed as an eccentric roller crusher and the first working unit is a rocker (8) and the second working unit is an eccentric roller (4). Crusher after Claim 13 , which is designed as a jaw crusher and the first working unit is a stationary support structure and the second working unit is a jaw crusher arm. Maintenance procedure for servicing a crusher (1) according to Claim 11 , comprising: - dismantling one or more of the first jaw segments (72a-72h) of the crusher (1); - providing replacement jaw segments for replacing the dismantled first jaw segments (72a-72h); and - assembling the replacement jaw segments.

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