impact crusher

Abstract

The invention relates to an impact crusher comprising a rotor with a plurality of rotor discs, wherein each rotor disc has a plurality of edge notches distributed over its outer peripheral portion, the edge notches being arranged in alignment with one another, the edge notches arranged in alignment with one another being designed for holding a plate hammer, each edge notch comprising a first side wall, a second side wall and a bottom wall, wherein on the second side wall of each edge notch a clamping pad with a clamping wall is arranged, the clamping pad being fixable on the second side wall in a clamping position in which the clamping wall of the clamping pad is arranged to catch the plate hammer. The clamping pad is supported on the second side wall in such a way that it can be moved from the clamping position to a maintenance position in which the clamping wall of the clamping pad is arranged to release the plate hammer.

Description

Technical Field

[0001] The present invention relates to an impact crusher comprising a rotor having a plurality of rotor discs, wherein each rotor disc has a plurality of edge notches distributed on its outer circumference, the edge notches being designed to extend radially inward from the outer circumference of the respective rotor disc, wherein the edge notches of the plurality of rotor discs are arranged to be aligned with each other, and the edge notches arranged to be aligned with each other are designed to retain a hammer, each edge notch including a first sidewall, a second sidewall and a bottom wall, each edge notch having a retainer on its first sidewall, wherein a clamping pad having a clamping wall is arranged on the second sidewall of each edge notch, and wherein the clamping pad can be fixed to the second sidewall in a clamping position, in which the clamping wall of the clamping pad is arranged to hold the hammer between itself and the retainer. Background Technology

[0002] Impact crushers of the aforementioned type are known, for example, from DE19813310C1. This known impact crusher comprises a rotor consisting of multiple rotor discs. The rotor discs are blocked by edge notches formed on the outer circumferential portion of the rotor discs and extending radially inward. All the edge notches of the rotor discs are aligned with each other and form retainers for hammers, wherein one sidewall of the edge notch forms a wider for the hammer. A clamping pad is supported on the opposite sidewall of each edge notch, which is inserted into the edge notch and serves to hold the inserted hammer against the sidewall forming the wider. In the direction of the bottom wall, each rotor disc has a ridge in the sidewall region, the ridge having a hole aligned with a hole in the clamping pad. A threaded connector is inserted through this hole, by means of which the clamping pad is secured to the rotor disc. To maintain a rotor or impact crusher, before removing and repairing the inserted hammer or replacing it with a new one, the threaded connections must be loosened and removed, and the clamping pads must be removed from the edge recesses. Clearly, maintaining the hammers requires loosening and removing multiple threaded connections from the rotor body, as well as removing the clamping pads, making maintenance both time-consuming and expensive. The weight of the components to be removed also poses an additional hazard.

[0003] The problem to be solved by the present invention is to provide a solution for an impact crusher in a structurally simple manner, wherein the hammers can be maintained simply, quickly, conveniently and safely. In the context of the present invention, "maintenance" is understood to mean removing the hammers from the rotor to repair and reinstall them, or replacing the hammers and fastening the new hammers to the rotor.

[0004] In the impact crusher of the above type, according to the present invention, this problem is solved by supporting the clamping pad on the second side wall in such a way that it can be moved from the clamping position to the maintenance position, in which the clamping wall of the clamping pad is arranged to release the hammer. Summary of the Invention

[0005] Advantageous and suitable embodiments and improvements of the invention are derived from the dependent claims.

[0006] This invention provides an impact crusher characterized in that each clamping pad can remain on the rotor disc during maintenance and does not need to be removed, which advantageously improves safety and saves cost and time during rotor maintenance, particularly during hammer replacement. According to the invention, the clamping pad is supported on the second sidewall of a corresponding recess in each rotor disc, such that the clamping pad can be radially downwardly moved and slid downwardly along the second sidewall in a controlled manner, and then the clamping pad can be pivoted towards the second sidewall from below, thereby placing the clamping pad in its maintenance position. In the maintenance position of the clamping pad, there is sufficient space within the edge recess to allow the hammer to be lifted upward from the edge recess, while the clamping pad remains in the rotor body and particularly on the rotor disc. After the hammer is replaced or rotated, the clamping pad is pivoted back, radially pushed upward, and secured in the clamping position. This invention offers an additional significant ergonomic advantage because, during maintenance work, maintenance personnel no longer need to remove the heavy clamping pads. Instead, the clamping pads remain on the rotor disc, where they are held and supported in a movable manner for maintenance purposes, allowing the hammers to be removed from the rotor body.

[0007] In one embodiment of the invention, it is particularly advantageous for the positioning device to fix the clamping pad to the second sidewall in the clamping position, wherein the positioning device is designed to hold the clamping pad to the second sidewall and guide the movement of the clamping pad relative to the second sidewall during movement from the clamping position to the maintenance position. According to the invention, this is a mechanical and robustly designed positioning device.

[0008] To avoid rotor damage and hazards to maintenance personnel during maintenance work, the present invention specifies in another design that the positioning device is designed to guide the clamping pad to move along the second side wall toward the bottom wall as the clamping pad moves from the clamping position to the maintenance position.

[0009] In order to provide sufficient free space for removing the hammer, the present invention specifies in another design that when the clamping pad is moved from the clamping position to the maintenance position, the positioning device supports the clamping pad in such a way that the clamping pad can pivot toward the second sidewall.

[0010] In order to movably support the clamping pad at the edge recess of the rotor disk, another design of the present invention specifies that the clamping pad is designed to have two side flanges that extend from the clamping wall and are parallel to each other, wherein a second side wall is arranged between the two side flanges, and each of the two side flanges has an opening with a stepped edge, and wherein the openings in the two side flanges are designed to be aligned with each other.

[0011] The opening and the stepped portion at the opening edge are used to receive the mechanical connector. In another design embodiment, the invention specifies that the positioning device has a first threaded connector for this purpose, which extends through the second sidewall and the two side flanges. The clamping pad is connected to the rotor disk in this manner.

[0012] To movably support the clamping pad, another design of the invention specifies that each opening in both side flanges is designed as a slotted guide type, and the first threaded connection is designed as a slider type. The first threaded connection is released to move away from the clamping position, such that during movement from the clamping position to the maintenance position, the clamping pad is connected to the second sidewall and can move relative to the second sidewall. Therefore, during the movement of the clamping pad from the clamping position to the maintenance position, the threaded connection, which is fixedly arranged on the rotor disk, guides the clamping pad because the clamping pad is supported on the second sidewall in a movable manner relative to the threaded connection through the slotted guide type opening.

[0013] To facilitate movement of the clamping pad towards the bottom wall of the edge recess during maintenance, another design aspect of the invention specifies that the openings in the side flanges each form a linearly extending portion having a predetermined width and extending from one end face of the clamping pad to the opposite end face. The first threaded connector has a guide and lock nut, the square cross-section of which is designed to adapt to the predetermined width of the opening. The square cross-section of the nut here has the advantage of precisely guiding the clamping pad and making the work easier, because loosening and tightening the first threaded connector does not require tools for double-nut lock-on.

[0014] In an embodiment of the invention, it is particularly advantageous that the first threaded connector, which is in a loose state during maintenance, forms a pivot axis, and the clamping pad is supported in such a way that it can pivot about the pivot axis when moved to the maintenance position.

[0015] In order to securely and permanently fasten the clamping pad in the clamping position, the present invention specifies in one design that the positioning device includes a second threaded connector extending through the second sidewall and the two side flanges, wherein a first through hole is formed through the second sidewall in the axial direction and a second through hole is arranged at a radial distance from the first through hole, the first through hole receiving the first threaded connector, and when viewed in the radial direction, the first through hole is arranged between the bottom wall and the second through hole.

[0016] To securely fasten the clamping pad in the clamping position, one design of the present invention specifies that, in the clamping position, the second through hole receives the second threaded connector, and the first and second threaded connectors each form a securely tightened connection, thereby fixing the clamping pad to the second sidewall. Specifically, the fixedly held clamping pad, in the clamping position, firmly clamps the hammer between itself and the retainer.

[0017] Finally, in one embodiment of the invention, the second threaded connector has a locking nut or a T-nut, the cross-section of which is adapted to the predetermined width of the opening or the stepped portion. This cross-section of the nut has the advantages of providing precise guidance for the clamping pad, making it easier to loosen and tighten the first threaded connector by eliminating the need for tools for double-nut locking, and securing the clamping pad in the clamping position in a more stable and secure manner.

[0018] It goes without saying that the features described above and those explained below can be used not only in the combinations given separately, but also in other combinations or individually, without departing from the scope of the invention. The scope of the invention is defined only by the claims. Attached Figure Description

[0019] Other details, features, and advantages of the invention will become apparent from the following description taken in conjunction with the accompanying drawings, in which preferred embodiments of the invention are shown by way of example. In the drawings:

[0020] Figure 1 A perspective view of an impact crusher according to the present invention is shown.

[0021] Figure 2 A side view of an impact crusher according to the present invention is shown.

[0022] Figure 3 A perspective detail view of the impact crusher according to the present invention is shown.

[0023] Figure 4 Another perspective detail view of the impact crusher according to the present invention is shown.

[0024] Figure 5A further perspective detail of the impact crusher according to the present invention is shown.

[0025] Figure 6 A perspective view of the edge notch and clamping pad of the rotor disc of the impact crusher according to the present invention is shown.

[0026] Figure 7 A perspective view of a portion of the clamping pad and positioning device is shown.

[0027] Figure 8 Another perspective view shows a portion of the clamping pad and positioning device.

[0028] Figure 9 A three-dimensional detailed view of the clamping pad in the clamping position is shown.

[0029] Figure 10 This diagram shows a detailed perspective view of the clamping pad moving from the clamping position to the maintenance position.

[0030] Figure 11 A three-dimensional detailed view is shown as the clamping pad moves toward the maintenance position, and...

[0031] Figure 12 A three-dimensional detail view is shown when the clamping pad is in the maintenance position. Detailed Implementation

[0032] Figures 1 to 3 Different views of rotor 1, which is part of an impact crusher, are shown. Rotor 1 includes multiple rotor discs 2, with a total of four rotor discs 2 in the illustrated embodiment. The rotor discs 2 are non-rotatably fastened to the rotor body 3. Hammers 4 are fastened to the rotor discs 2 at uniform circumferential intervals around the outer circumference of the rotor discs 2, wherein each hammer 4 extends axially in a direction 5 relative to the rotor body 3 and crosses the rotor disc 2. In the illustrated embodiment, rotor 1 has a total of four hammers 4. For greater clarity, Figure 2 Only two hammers 4 are shown to make the edge notches 6 more visible. The hammers 4 are inserted into and secured in the edge notches 6 in the rotor disks 2. Accordingly, each rotor disk 2 includes a plurality of edge notches 6 distributed along its outer circumference 7, which are designed to extend radially inward from the outer circumference 7 of each rotor disk 2. In summary, referring to the illustrated embodiment, four edge notches 6 are formed in each rotor disk 2 for securing four hammers 4. The edge notches 6 of the plurality of rotor disks 2 are arranged to be aligned with each other, wherein the edge notches 6 arranged to be aligned with each other are designed for securing the hammers 4. Each hammer 4 is supported on a retainer 8, wherein the support is provided on the rear side of the hammer 4, which faces away from the dominant rotational direction or rotor circumferential direction 9 of the rotor 1 during operation.

[0033] Figures 4 to 6 A detailed view of a single edge notch 6 of a single rotor disk 2 is shown, in which... Figure 4 A front view of rotor disk 2 is shown. Figure 5 A rear view of the same rotor disk 2 is shown, while Figure 6 The components are shown in the front view. For example... Figure 4 and Figure 5 As shown, a clamping pad 10 is provided to secure the hammer 4. The clamping pad is arranged in the edge recess 6. When the clamping pad 10 is in the clamping position, the corresponding hammer 4 is arranged to be locked between the clamping pad 10 and the retainer 8. Figures 1 to 5 The clamping position of each clamping pad 10 is shown. From Figure 6 As can be seen from the component diagram, the edge notch 6 includes a first sidewall 12, a second sidewall 14 arranged opposite to the first sidewall 12, and a bottom wall 15. The circumferential extension dimension of the edge notch 6 increases in the radial direction 16 toward the rotor body 3, so that, observed in the circumferential direction, the edge notch 6 is larger in the region of the bottom wall 15 than in the outer circumferential portion 7 of the rotor disk 2. The first sidewall 12 of the edge notch 6 has a retainer 8, which is fastened to the rotor disk 2 in the illustrated embodiment, or alternatively, may be formed by the rotor disk 2 itself. Each hammer 4 has a groove extending in the axial direction 5 on its side facing the retainer 8, into which a retaining crossbar 18 is inserted, and the retaining crossbar 18 is fastened in a recess within the retainer 8. The retaining crossbar 18 holds the clamped hammer 4 in place and prevents the hammer from moving in the radial direction 16 during operation.

[0034] Figure 4 and Figure 5 The clamping pad 10 is shown in the clamping position, while Figures 6 to 8 Various component diagrams are shown, and will be discussed below. Each clamping pad 10 is supported on the second sidewall 14 of each edge recess 6. In the clamping position, the clamping pad 10 is fixed to the second sidewall 14, wherein, in the clamping position, the clamping wall 19 of the clamping pad 10 abuts against the hammer 4, such that the hammer 4 is fixed in a manner that it is clamped between the clamping wall 19 of the clamping pad 10 and the retainer 8. Therefore, in the clamping position, the clamping wall 19 of the clamping pad 10 is arranged to hold the hammer 4 between the clamping wall and the retainer 8. According to the invention, the clamping pad 10 is supported on the second sidewall 14 in a manner that allows it to be moved from the clamping position to a maintenance position, wherein, in the maintenance position, the clamping wall 19 of the clamping pad 10 is arranged to release the hammer 4, for example, as... Figure 12As shown, and will be described in more detail below, the clamping pad 10 is secured in its clamping position by a positioning device 11. The positioning device 11 secures the clamping pad 10 to the second sidewall 14 in the clamping position (see, for example, see...). Figures 1 to 5 and Figure 9 The positioning device 11 is designed to hold the clamping pad 10 on the second sidewall 14 and guide the movement of the clamping pad 10 relative to the second sidewall 14 during movement from the clamping position to the maintenance position. The movement between the clamping position and the maintenance position occurs... Figure 10 and Figure 11 As shown in the middle, Figure 12 The maintenance position of the clamping pad 10 is shown. The positioning device 11 is also designed to guide the clamping pad 10 along the second sidewall 14 toward the bottom wall 15 as it moves from the clamping position to the maintenance position (see, for example, see...). Figure 10 and Figure 11 Finally, as the clamping pad 10 moves from the clamping position to the maintenance position, the positioning device 11 supports the clamping pad 10 in such a way that it can pivot toward the second sidewall 14.

[0035] Figures 6 to 8 Further details of the structural design of the clamping pad 10 are shown. It can be seen that the clamping pad 10 is designed to have two side flanges 20 and 21. The two side flanges 20 and 21 extend from the clamping wall 19 and extend parallel to each other. The two side flanges 20 and 21 here surround the second side wall 14 (see also, for example,...) Figure 4 and Figure 5 The second sidewall 14 is arranged between the two side flanges 20 and 21. Furthermore, each of the two side flanges 20 and 21 has an opening 22 and an opening 23. Each of the openings 22 and 23 has a linearly extending portion 24 and a linearly extending portion 25. The linearly extending portions 24 and 25 are aligned with each other. The linearly extending portions 24 and 25 extend from the end face 38 of the clamping pad 10 to the opposite end face 39 of the clamping pad 10. Furthermore, each edge 26 of the openings 22 and 23 has a stepped portion 27.

[0036] When the clamping pad 10 is moved from the clamping position to the maintenance position, the positioning device 11 is constructed by the first threaded connector 28. Furthermore, in the clamping position, the positioning device 11 is constructed by the first threaded connector 28 and the second threaded connector 29. In both the clamping and maintenance positions, the clamping pad 10, together with the openings 22 and 23 formed therein in the side flanges 20 and 21, constitutes part of the positioning device 11. For example, it can be seen from... Figures 6 to 8The first threaded connector 28 and the second threaded connector 29 are seen. Both the first threaded connector 28 and the second threaded connector 29 extend through the second sidewall 14 and pass through the two side flanges 20 and 21, respectively. Specifically, the first threaded connector 28 and the second threaded connector 29 extend through openings 22 and 23 in the two side flanges 20 and 21. Figure 6 As shown, a first through hole 30 and a second through hole 31 are formed in the second sidewall 14, respectively for receiving the first threaded connector 28 and the second threaded connector 29. The first through hole 30 and the second through hole 31 extend through the second sidewall 14 in the axial direction 5. Figure 6 It can be seen that the second through hole 31 is arranged at a radial distance 32 from the first through hole 30. The radial distance 32 is less than the radial extension dimension 33 of the straight portions 24 and 25 of the two openings 22 and 23 in the two side flanges 20 and 21. Viewed along the radial direction 16, the first through hole 30 is arranged between the bottom wall 15 and the second through hole 31.

[0037] As described above, during the movement from the clamping position to the maintenance position, the positioning device 11 includes only the first threaded connector 28, while in the clamping position, the positioning device 11 includes the first threaded connector 28 and the second threaded connector 29. The first threaded connector 28 extends through the first through hole 30, while the second threaded connector 29 extends through the second through hole 31. Therefore, the first threaded connector 28 and the second threaded connector 29 are fixedly arranged on the second sidewall 14.

[0038] Figures 9 to 12 The steps for removing the hammer 4 are illustrated schematically. Figure 9 The clamping pad 10 is shown in its clamping position, where the clamping pad 10 holds the hammer between itself and the retainer 8. In the clamping position, the first threaded connector 28 and the second threaded connector 29 each form a securely tightened connection, such that the clamping pad 10 is fixedly held on the second sidewall 14. In the context of this invention, the securely tightened connection should be understood as a threaded connection, wherein, for example, a predetermined torque is applied during tightening, thereby ensuring that the clamping pad 10 is immovably fixed on the second sidewall 14 in the clamping position by means of the securely tightened first and second threaded connectors. In the clamping position (e.g.) Figure 4 and Figure 5As shown, the first threaded connector 29 and the second threaded connector 30 are supported on stepped portions 27 formed in and assigned to openings 22 and 23 in the side flanges 20 and 21. More precisely, the corresponding bolt heads 34 and corresponding nuts 35 and 36 are supported on the stepped portions 27. The nut 35 of the first threaded connector 28 is designed as a guide and lock-lock nut, the square cross-section of which is adapted to the predetermined width 37 of the opening 22. The nut 36 of the second threaded connector 29 can also be constructed as a lock-lock nut, wherein, in the illustrated embodiment, the nut 36 is constructed as a T-shaped slider, the cross-section of which is adapted to the predetermined width 37 of the opening 23 and the cross-section of the stepped portion 27 of the opening 23. The square cross-sections of the nuts 35 and 36 have the advantage that the first threaded connector 28 and the second threaded connector 29 can be loosened or released (but can also be tightened) without the need for locking tools for double-nut lock-locking, and the nuts 35 and 36 are supported on the stepped edge 26 or on the corresponding stepped portion 27, respectively. To maintain the corresponding hammer 4, the second threaded connector 29 is loosened and removed, while the first threaded connector 28 remains loose. This is in Figure 10 As shown, the second threaded connector 29 is removed and detached from the clamping pad 10 and the second sidewall 14. In the context of this invention, the released state should be understood as the first threaded connector 28 no longer being tightened with a predetermined torque. Therefore, the first threaded connector 28 is held on the second sidewall 14, but does not fix the clamping pad 10 in the clamping position. Instead, it allows the clamping pad 10 to move relative to the first threaded connector 28 and thus relative to the second sidewall 14.

[0039] Because the openings 22 and 23 in the two side flanges 20, 21 are designed as slotted guides, and the first threaded connector 28 is designed as a slider, the clamping pad 10 can move relative to the first threaded connector 28 and therefore relative to the second sidewall 14. Compared to Figure 10 , can Figure 11 This relative movement is observed. As the first threaded connector 28 is released to move out of the clamping position, the clamping pad 10 remains connected to the second sidewall 14 and is movable relative to it during the movement from the clamping position to the maintenance position. Figure 11The image shows the position of the clamping pad 10 as it is displaced toward the bottom wall 15, in which, when viewed with reference to openings 22, 23, the first threaded connector 28 moves radially outward in the corresponding straight portions 24, 25 of openings 22, 23. This radial displacement of the clamping pad 10 toward the bottom wall 15 terminates when the first threaded connector 28 reaches the longitudinal end 40 of the straight portions 24, 25. Figure 11 As shown. When the clamping pad 10 moves from the clamping position to the maintenance position, the first threaded connector 28, which is in the released state, also forms a pivot axis 41 (see, for example, [reference needed]). Figure 12 The clamping pad 10 is supported in a manner that allows it to pivot about the pivot axis when moved to the maintenance position. Using this pivot axis 41, the clamping pad 10 can be moved from... Figure 11 The position shown is pivoted toward the second sidewall 14, and pivoted toward the second sidewall 14 to reach the maintenance position, as shown. Figure 12 As shown, the clamping pad 10 is in the maintenance position. In the maintenance position, the clamping wall 19 of the clamping pad 10 is arranged to release the hammer 4, and the clamping pad 10 is held on the second side wall 14 such that the clamping pad 10 is held on the second side wall 14 for removal of the hammer 4 without the need to disassemble the clamping pad 10. To facilitate the removal of the hammer 4, in one embodiment (not shown), the clamping pad 10 can be locked in the maintenance position by means of an additional threaded connection that secures the clamping pad 10 together with a first threaded connection 28 on the second side wall 14 in the maintenance position.

[0040] In summary, the present invention relates to a hammer locking mechanism in a rotor body, wherein the clamping pad 10 and the second sidewall 14 of each rotor disk 2 are specially constructed. Each clamping pad 10 is designed such that its clamping wall 19 and side flanges 20, 21 correspond to the contour of the rotor disk 2, so that after the removal of the second threaded connection 29, the clamping pad 10 can be pried downward, i.e., moved radially inward toward the bottom wall 15 of the corresponding edge recess 6. According to a preferred embodiment, the clamping pad 10 slides in a controlled manner toward the bottom wall 15 via the first threaded connection 28 and the straight portions 24, 25 of the openings 22, 23, and then pivots toward the second sidewall 14 of the rotor disk 2 at this lower position, such that the clamping pad 10 is positioned in a maintenance position. This special kinematic characteristic of the clamping pad 10 provides sufficient space in the maintenance position to allow the hammer 4 to be lifted from the edge recess 6 while the clamping pad 10 remains on the rotor disk 2. After the hammer 4 is replaced or rotated, the clamping pad 10 is pivoted back, pushed upward, and re-secured in the locked clamping position via the first threaded connector 28 and the second threaded connector 29 in a state ready for restarting. Therefore, according to the invention, the clamping pad 10 can remain on the rotor disc 2 for maintenance.

[0041] Of course, the above invention is not limited to the embodiments described and illustrated. It will be apparent that various modifications readily conceived by those skilled in the art can be made to the embodiments shown in the drawings, depending on the intended application, without departing from the scope of the invention. All content contained in the specification and / or shown in the drawings is part of this invention, including any content that differs from the specific exemplary embodiments readily conceived by those skilled in the art.

[0042] List of reference numerals

[0043] 1 rotor

[0044] 2 rotor discs

[0045] 3 Rotor body

[0046] 4 hammers

[0047] 5 Axial directions

[0048] 6 edge notches

[0049] 7. Peripheral section

[0050] 8 retainers

[0051] 9. Rotor rotation direction

[0052] 10 clamping pads

[0053] 11 Positioning Device

[0054] 12 First sidewall

[0055] 14 Second sidewall

[0056] 15 bottom wall

[0057] 16 radial directions

[0058] 17 weeks in the direction

[0059] 18. Maintain the crossbar

[0060] 19 Clamping Wall

[0061] 20 lateral wing edges

[0062] 21 lateral wing edges

[0063] 2220 opening

[0064] 2321 opening

[0065] 24. Straight lines

[0066] 25. Straight sections

[0067] 26 edges

[0068] 27 steps

[0069] 28 First threaded connector

[0070] 29 Second threaded connector

[0071] 30 First through hole

[0072] 31 Second through hole

[0073] 32 radial distance

[0074] 33 radial extension dimensions

[0075] 34 bolt head

[0076] 3528 nuts

[0077] 3629 nuts

[0078] 3722 pre-defined width

[0079] 38 end face

[0080] 39 end face

[0081] Longitudinal ends of 4024 and 25

[0082] 41. Pivot axis.

Claims

1. An impact crusher comprising a rotor (1) having a plurality of rotor discs (2), each rotor disc (2) having a plurality of edge recesses (6) distributed on an outer circumferential portion (7) of the rotor disc, the edge recesses (6) being designed to extend radially inward from the outer circumferential portion (7) of the respective rotor disc (2), wherein the edge recesses (6) of the plurality of rotor discs (2) are arranged to be aligned with each other, the edge recesses (6) arranged to be aligned with each other being designed to hold a hammer (4), each edge recess (6) having a first The wall comprises a sidewall (12), a second sidewall (14), and a bottom wall (15). Each edge recess (6) has a retainer (8) on the first sidewall (12) of the edge recess. A clamping pad (10) including a clamping wall (19) is arranged on the second sidewall (14) of each edge recess (6). The clamping pad (10) can be fixed to the second sidewall (14) in a clamping position. In the clamping position, the clamping wall (19) of the clamping pad (10) is arranged to hold the hammer (4) between the clamping wall (19) and the retainer (8). in, The clamping pad (10) is supported on the second sidewall (14) in a manner that allows it to be moved from the clamping position to a maintenance position, in which the clamping wall (19) of the clamping pad (10) is arranged to release the hammer (4). In the clamping position, the positioning device (11) fixes the clamping pad (10) to the second sidewall (14), wherein the positioning device (11) is designed to: hold the clamping pad (10) on the second sidewall (14) during movement from the clamping position to the maintenance position, and guide the clamping pad (10) to move relative to the second sidewall (14), and When the clamping pad (10) moves from the clamping position to the maintenance position, the positioning device (11) supports the clamping pad (10) in such a way that the clamping pad (10) can pivot toward the second sidewall (14).

2. The impact crusher according to claim 1, characterized in that, The positioning device (11) is designed to guide the clamping pad (10) to move along the second side wall (14) toward the bottom wall (15) as the clamping pad (10) moves from the clamping position to the maintenance position.

3. The impact crusher according to claim 2, characterized in that, The clamping pad (10) is designed to have two side flanges (20, 21), wherein the two side flanges extend from the clamping wall (19) and extend parallel to each other, the second side wall (14) is arranged between the two side flanges (20, 21), and each of the two side flanges (20, 21) has an opening (22, 23), the edge (26) of the opening is formed with a step (27), and the openings (22, 23) in the two side flanges (20, 21) are designed to be aligned with each other.

4. The impact crusher according to claim 3, characterized in that, The positioning device (11) has a first threaded connector (28) that extends through the second sidewall (14) and the two side flanges (20, 21).

5. The impact crusher according to claim 4, characterized in that, The openings (22, 23) of each of the two side flanges (20, 21) are designed as slotted guides, and the first threaded connector (28) is designed as a slider, wherein the first threaded connector (28) is released to move away from the clamping position, such that during the movement from the clamping position to the maintenance position, the clamping pad (10) is connected to the second sidewall (14) and is movable relative to the second sidewall (14).

6. The impact crusher according to claim 4, characterized in that, The openings (22, 23) in the side flanges (20, 21) are designed to each have a straight-line extending portion (24, 25) having a predetermined width (37) and extending from the end face (38) of the clamping pad (10) to the opposite end face (39) of the clamping pad (10), wherein the first threaded connector (28) has a guide and lock nut (35) having a square cross-section designed to adapt to the predetermined width (37) of the openings (22, 23).

7. The impact crusher according to claim 4, characterized in that, The first threaded connector (28) in the loosened state forms a pivot axis (41) in which the clamping pad (10) is supported in a manner that allows it to pivot about the pivot axis as the clamping pad (10) moves to the maintenance position.

8. The impact crusher according to claim 4, characterized in that, The positioning device (11) has a second threaded connector (29) extending through the second sidewall (14) and the two side flanges (20, 21), wherein a first through hole (30) and a second through hole (31) are formed through the second sidewall (14) in the axial direction (5), the second through hole (31) being arranged to be spaced apart from the first through hole (30) by a radial distance (32), the first through hole (30) receiving the first threaded connector (28), and when viewed in the radial direction (16), the first through hole (30) being arranged between the bottom wall (15) and the second through hole (31).

9. The impact crusher according to claim 8, characterized in that, In the clamping position, the second through hole (31) receives the second threaded connector (29), and the first threaded connector (28) and the second threaded connector (29) each form a securely tightened connection, so that the clamping pad (10) is fixedly held on the second sidewall (14).

10. The impact crusher according to claim 8, characterized in that, The second threaded connector (29) has a lock nut or a T-nut (36) whose cross-section is designed to adapt to the predetermined width (37) of the opening (23) or the step portion (27) of the opening (23).

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