Plate hammer for impact crusher and impact crusher comprising same
By designing a centrally located concave area and surface texture on the hammer, the airflow is adjusted to reduce wear, thus solving the problem of uneven wear on the hammer and achieving more uniform wear and improved energy efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- METSO FINLAND OY FI
- Filing Date
- 2025-02-21
- Publication Date
- 2026-04-28
AI Technical Summary
The impact crusher's hammer plate suffers from uneven wear during use, leading to frequent parts replacements and increased downtime.
Design a hammer plate with a centrally located concave section and surface texture to adjust airflow, reduce the air pressure of abrasive particles flowing to easily worn areas, and achieve more uniform wear.
By reducing uneven wear of the hammer plates, their service life is extended, operating energy consumption is reduced, and the energy efficiency of the crushing process is improved.
Smart Images
Figure CN224167604U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to an impact crusher. More specifically, this disclosure relates to a blow bar for an impact crusher and an impact crusher including the blow bar. Background Technology
[0002] Impact crushers are used to reduce the size of mineral materials. To this end, impact crushers include a rapidly rotating rotor that throws the mineral material against a hard, stationary impact wall. The rotor of an impact crusher is equipped with hammers, also known as hammers or impact bars, which impact the mineral material during operation, causing it to pulverize. Impact bars are often plagued by uneven wear patterns, where the end portions of the bar wear at a much faster rate than the center portions. This necessitates frequent hammer replacements, which are costly in terms of both the cost of replacement parts and the downtime required for replacement. Therefore, an improved hammer design is needed. Summary of the Invention
[0003] One objective is to alleviate, mitigate, or eliminate one or more of the aforementioned defects and disadvantages in the art, individually or in any combination, and to at least solve the aforementioned problems. According to a first aspect, a hammer for an impact crusher is provided, the hammer having a longitudinal extension and a transverse extension. The hammer includes a leading face and a trailing face. The trailing face includes a mounting portion extending along at least a portion of the longitudinal extension of the hammer for mounting the hammer to the impact crusher. The trailing face also includes a recess having a first extension along a portion of the longitudinal extension of the hammer and including at least one notch. The notch is centrally arranged relative to the longitudinal extension of the hammer, and the first extension is defined by an unrecessed end of the trailing face.
[0004] By providing a hammer plate with a centrally arranged recess as disclosed above, the inventors have achieved a surprising and beneficial effect on the airflow along the surface of the hammer plate when the hammer plate rotates together with the rotor of an impact crusher. More specifically, increased turbulence is achieved along the portion of the rear surface where the recess is located. Consequently, a reduction in associated air pressure is achieved along the corresponding portion of the leading surface of the hammer plate. The reduced air pressure in these portions guides the flow of abrasive particles from areas prone to high wear rates (such as the end portions of the hammer plate) toward the portion of the leading surface experiencing the reduced air pressure. Thus, more uniform wear of the hammer plate is achieved. Those skilled in the art will recognize that, in this respect, abrasive particles refer to abrasive particles of sufficiently small size such that their movement can be affected by airflow variations associated with locally reduced air pressure.
[0005] Another advantage of providing a recess is that it reduces the overall mass of the hammer. This, in turn, reduces the energy required to operate the impact crusher when the hammer is installed in it, thereby lowering operating costs and improving the energy efficiency of the crushing process.
[0006] The recesses can have several different configurations to adjust their effect on airflow, thereby adjusting the guidance of abrasive particles as described above. For example, in some embodiments, the recesses may include two or more notches, each notch having a first extension along a portion of the longitudinal extension of the hammer, wherein the first extension of each of the two or more notches is defined by an unrecessed portion of the rear surface. By providing two or more notches defined by non-recessed portions in the longitudinal direction of the rear surface, the resulting reduction in air pressure and the associated guidance of the abrasive particle flow can be distributed to two or more portions of the leading surface. Typically, two or more notches are arranged at less abrasive portions of the hammer.
[0007] Accordingly, when the hammer plate operates in an impact crusher, the unrecessed boundary portion of the rear surface can effectively maintain air pressure in areas prone to high wear rates. In view of this disclosure, those skilled in the art will recognize that the air pressure and airflow generated along the leading face of the hammer plate are complex aerodynamic relationships that can be tailored using the embodiments disclosed herein.
[0008] In some embodiments, the mounting portion of the hammer is composed of a plurality of mounting portions that extend discontinuously in the direction of the longitudinal extension of the hammer. In such embodiments, each notch may be associated with a discontinuous portion of the discontinuous extension of the mounting portion, and a first extension of each notch extends at least a portion of the length of the associated discontinuous portion.
[0009] In some embodiments, each notch is centered relative to the length of its associated discontinuity.
[0010] In some embodiments, each notch is centered relative to the lateral extension of the hammer.
[0011] In some embodiments, the extension of each notch in the direction of the lateral extension of the hammer exceeds half of the lateral extension of the hammer. Alternatively, the extension of each notch in the direction of the lateral extension of the hammer is equal to the lateral extension of the hammer.
[0012] In some embodiments, the mounting portion protrudes at least partially from the base plane, and each notch is recessed relative to the base plane.
[0013] In some embodiments, the hammer further includes a first surface texture extending along a longitudinal extension of the hammer at a lateral portion of the rear surface, wherein the first surface texture comprises a pattern of protrusions or depressions or a combination thereof. The purpose of this surface texture is to further facilitate turbulent airflow along the rear surface of the hammer, thereby achieving, as previously described, a correlated reduction in air pressure along the corresponding portion of the leading surface of the hammer. Providing depressions is further advantageous because it reduces the overall mass of the hammer. This, in turn, reduces the energy required to operate the impact crusher when the hammer is installed in it, thereby reducing operating costs and improving the energy efficiency of the crushing process.
[0014] In some embodiments, each notch defines a notch plane recessed from the base plane, and wherein the notch plane is at least partially provided with a second surface texture comprising a pattern of protrusions or depressions, or combinations thereof, that protrude or retract relative to the notch plane. This is advantageous because, when operating in an impact crusher, each notch can further reduce the air pressure experienced by the hammer at the notched portion, thereby directing the abrasive particle flow to these portions and resulting in a more uniform wear pattern on the hammer. Providing a second surface texture can further lead to a reduced total mass of the hammer, as previously mentioned, which is advantageous.
[0015] In some embodiments, the pattern of the second surface texture is different from the pattern of the first surface texture. Alternatively, the pattern of the second surface texture is the same as the pattern of the first surface texture.
[0016] In some embodiments in which the notch plane is at least partially provided with a second surface texture, the notch plane is also provided with a third surface texture, the third surface texture comprising a pattern of protrusions or depressions or combinations thereof relative to the notch plane, and wherein the third surface texture has a pattern different from that of the second surface texture.
[0017] In some embodiments, the pattern of the third surface texture is different from the pattern of the first surface texture.
[0018] In some embodiments, the pattern of each of the first, second, and third textures is selected from: directional patterns, bidirectional patterns, multidirectional patterns, wave patterns, pit patterns, random patterns, or combinations thereof.
[0019] According to the second aspect, the application of the hammer plate in the impact crusher as disclosed herein is provided.
[0020] According to a third aspect, an impact crusher is provided, which includes a hammer as disclosed herein.
[0021] The effects and characteristics of the second and third aspects are largely similar to those described above in conjunction with the first aspect.
[0022] The embodiments mentioned in the first aspect are largely compatible with the second and third aspects. It should also be noted that, unless otherwise expressly stated, this disclosure relates to all possible combinations of features.
[0023] The further applicability of this disclosure will become apparent from the detailed description given below. However, it should be understood that while the detailed description and specific embodiments indicate preferred embodiments of this disclosure, they are given by way of illustration only, as various changes and modifications within the scope of this disclosure will become apparent to those skilled in the art based on this detailed description.
[0024] Therefore, it should be understood that this disclosure is not limited to the specific components of the described apparatus, as such apparatus can vary. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. It must be noted that, as used in the specification and appended claims, the articles “a,” “an,” “the,” and “the” are intended to indicate the presence of one or more elements, unless the context clearly specifies otherwise. Thus, for example, references to “a unit” or “the unit” can include several means, etc. Furthermore, the words “comprising,” “including,” “containing,” and similar terms do not exclude other elements or steps.
[0025] In short, this disclosure can also be described as a hammer for an impact crusher, the hammer including a front guide surface and a rear surface, wherein the rear surface includes: a mounting portion for mounting the hammer to the impact crusher; and a recess having a first extension in the longitudinal direction of the hammer, wherein the recess is centrally located relative to the longitudinal extension of the hammer, and the first extension of the recess is smaller than the longitudinal extension of the hammer. Attached Figure Description
[0026] The present disclosure will be described in more detail by way of example with reference to the accompanying schematic diagrams, which illustrate the present preferred embodiments of the present disclosure.
[0027] Figure 1 A schematic diagram of a typical wear profile of a conventional hammer known in the prior art is shown.
[0028] Figure 2 A schematic diagram of the wear profile of a hammer according to an embodiment of the present disclosure is shown.
[0029] Figure 3 A schematic diagram of the rear surface of a hammer according to an embodiment of the present disclosure is shown.
[0030] Figure 4 A schematic diagram of the rear surface of a hammer according to an embodiment of the present disclosure is shown.
[0031] Figure 5A schematic diagram of the rear surface of a hammer according to an embodiment of the present disclosure is shown.
[0032] Figure 6 A schematic diagram of the rear surface of a hammer according to an embodiment of the present disclosure is shown.
[0033] Figure 7 A schematic diagram of the rear surface of a hammer according to an embodiment of the present disclosure is shown.
[0034] Figure 8 A schematic perspective view of a hammer according to an embodiment of the present disclosure is shown. Detailed Implementation
[0035] This disclosure will now be described more fully below with reference to the accompanying drawings, in which presently preferred embodiments of the disclosure are illustrated. However, this disclosure may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and to fully convey the scope of this disclosure to those skilled in the art.
[0036] In order to disclose the concept of this disclosure, Figure 1 The outline 102 of the leading surface 101 of a conventional hammer 100 without any recesses or surface texture is shown schematically. An uneven wear profile 103 associated with this hammer is superimposed on the unworn profile 102 of the leading surface 101. Figure 1 The higher wear rate seen in the corner region 104 of the hammer 100 shown is due to the higher airflow toward the corner region 104. This is partly a result of the locally lower air pressure 400, which allows the abrasive particle flow 300 to be directed toward these regions, thus leading to an increased wear rate.
[0037] Next, Figure 2 The outline of the leading surface 201 of the hammer 200 according to this disclosure is shown schematically, wherein the hammer 200 includes a recess on its rear surface (not shown). As previously described, by providing a hammer 200 with a centrally arranged recess, the inventors have achieved a surprising and beneficial effect on the airflow 400 along the surface of the hammer 200 when the hammer 200 rotates together with the rotor of an impact crusher. More specifically, increased turbulence is achieved along the portion of the rear surface where the recess (not shown) is provided. Consequently, a correspondingly reduced air pressure 400 is achieved along the corresponding portion of the leading surface 201 of the hammer 200. The reduced air pressure 400 in these portions guides the abrasive particle flow 300 from areas prone to high wear rates (such as the end portions of the hammer, also referred to as corner portions 204) toward the portion of the leading surface experiencing the reduced air pressure. Thus, a more uniform wear profile 203 of the hammer 200 is achieved.
[0038] Now for reference Figure 3 This illustration shows an exemplary embodiment of a hammer 10 for an impact crusher according to the present disclosure. The hammer 10 has a longitudinal extension L and a transverse extension T. The hammer 10 includes a leading surface (not shown) and a rear surface 12 opposite to the leading surface. The rear surface 12 includes a mounting portion extending along a portion of the longitudinal extension L of the hammer 10 for mounting the hammer 10 to the impact crusher. Here, the longitudinal extension of the mounting portion 14 is slightly shorter than the longitudinal extension L of the hammer 10. The rear surface 12 also includes a recess 15 having a first extension E along a portion of the longitudinal extension L of the hammer 10 and including at least one notch 16. The recess 15 is centrally arranged relative to the longitudinal extension L of the hammer 10, and the first extension E of the recess 15 is defined by an unrecessed end 20 of the rear surface 12.
[0039] Typically, and as shown in this exemplary embodiment, the mounting portion 14 is centrally located relative to the lateral extension T of the hammer 10. A recess 15 is also located on one side of the mounting portion 14, preferably near the first longitudinal end 22 of the hammer 10. In other embodiments, the hammer 10 further includes a second recess that is mirrored with the recess 15 along the longitudinal extension of the mounting portion 14. This embodiment allows the hammer 10 to be flipped and reinstalled into the impact crusher once one side of the leading surface wears down.
[0040] Typically, hammer plates can have a longitudinal extension L of 500 mm to 3000 mm, and impact crushers in which hammer plates can be used typically handle rocks with diameters up to about 1600 mm. Therefore, it is certainly advantageous to provide a hammer plate with more uniform wear to extend its wear life and thereby reduce the amount of downtime required to replace or rearrange the hammer plates in the impact crusher.
[0041] Now it will be made public Figure 3 Various alternative embodiments of the hammer 10 shown are illustrated. Those skilled in the art will recognize that the airflow generated along the leading surface of the hammer 10 is a complex aerodynamic relationship that can be tailored using the embodiments disclosed herein.
[0042] Each embodiment provides an alternative configuration of the recess 15. It should be understood that the disclosed embodiments can be combined to achieve the desired effect on airflow along the leading surface.
[0043] exist Figure 4 In the illustrated embodiment, the recess 15 includes two notches 16. Each notch 16 has a first extension E along the longitudinal extension L of the hammer 10, and the first extension E of each notch 16 is defined by an unrecessed portion of the rear surface 12. That is, each notch 16 is defined in the longitudinal direction by an unrecessed portion of the rear surface 12. The recess 15 is arranged close to the first longitudinal end 22 of the hammer 10.
[0044] In other embodiments, the hammer 10 includes a corresponding recess 15 on each side of the mounting portion 14, making it symmetrical, so that once one side of the leading surface is worn, the hammer 10 can be flipped and reinstalled into the impact crusher.
[0045] In an alternative embodiment, recess 15 may include three, four, five, or more notches, wherein a first extension of each notch is defined by an unrecessed portion of the rear surface. By providing multiple notches defined by the unrecessed portion of the rear surface, a reduction in air pressure and the guidance of the associated abrasive particle flow can be distributed to two or more portions of the leading surface. Typically, the reduced air pressure is distributed to the less easily worn portion of the hammer, such as... Figure 2 The middle area of the publicly disclosed hammer.
[0046] Next, Figure 5 An exemplary embodiment of the hammer 10 is shown, wherein the mounting portion 14 comprises a plurality of mounting portions 14 that extend discontinuously along a portion of the longitudinal extension L of the hammer 10. In this particular embodiment, the hammer 10 includes three mounting portions 14 that extend discontinuously in the direction of the longitudinal extension L of the hammer 10 and extend centrally relative to the lateral extension T of the hammer. Thus, the discontinuous extension of the three mounting portions 14 forms two discontinuities 19. In other embodiments, the mounting portion may include two, four, five, six or more mounting portions, thereby forming one, three, four, five or more discontinuities.
[0047] exist Figure 5 In the exemplary embodiment shown, the recess 15 includes two notches 16. Each notch 16 is associated with a corresponding discontinuity 19 of the discontinuous extension of the mounting portion 14. Each notch 16 has a first extension E that at least extends a portion of the length of the associated discontinuity 19. In embodiments including one, three, four, five, or more discontinuities 19, the recess 15 may include one, three, four, five, or more notches, each notch associated with a corresponding discontinuity of the discontinuous extension of the mounting portion, wherein each notch may have a first extension that at least partially extends the length of the associated discontinuity.
[0048] Figure 5Each notch 16 is centered relative to the length of its associated discontinuity 19 and centered relative to the lateral extension T of the hammer 10. Similarly, in embodiments including one, three, four, five or more notches 16 each associated with a corresponding discontinuity 19, each of the one, three, four, five or more notches 16 may be centered relative to the length of its associated discontinuity 19 and centered relative to the lateral extension T of the hammer 10.
[0049] Figure 5 Each notch 16 extends along a large portion of the lateral extension T of the hammer 10. The lateral extension of each notch 16 thus extends beyond half of the lateral extension T of the hammer 10. In other embodiments, the lateral extension of each notch 16 may be equal to the lateral extension T of the hammer 10. Similarly, in embodiments including one, three, four, or more notches associated with corresponding discontinuities, each of the one, three, four, five, or more notches may have an extension greater than half of the lateral extension T of the hammer. Alternatively, each notch 16 may have a lateral extension equal to the lateral extension T of the hammer 10.
[0050] Reference Figure 5 Each notch 16 shown in the exemplary embodiments described has a square shape. In other embodiments, each notch may have any other suitable shape, such as, but not limited to, a rectangular shape, a triangular shape, a circular shape, an elliptical shape, or an hourglass shape. Similarly, in embodiments including one, three, four, or more notches associated with corresponding discontinuities, each of the one, three, four, five, or more notches may have any of a square shape, a rectangular shape, a triangular shape, a circular shape, an elliptical shape, or an hourglass shape. In some embodiments, the three, four, five, or more notches associated with corresponding discontinuities may have the same shape. In other embodiments, the notches may have different shapes.
[0051] Now continue with the reference. Figure 6 It shows the same as Figure 5The illustrated embodiment is similar to the hammer 10, but also includes a first surface texture 17 disposed on the rear surface 12 of the hammer 10. The first surface texture 17 comprises a recessed linear pattern. In this exemplary embodiment, the first surface texture 17 extends longitudinally on each longitudinal side of the mounting portion 14 in the direction of the longitudinal extension L of the hammer 10. Furthermore, the recessed linear pattern of this embodiment is slightly interrupted by a notch 16, thereby causing the first surface texture 17 at portions of the hammer 10 to extend discontinuously along the longitudinal extension L of the hammer 10. Within the concept of this disclosure, a first surface texture 17 extending along the longitudinal extension L of the hammer 10 in a linear but interrupted pattern may also be provided.
[0052] In other embodiments, the first surface texture 17 may include a pattern of protrusions or recesses, or a combination thereof. As in this exemplary embodiment, the pattern may be an oriented pattern. In other embodiments, the pattern may be, but is not limited to, a bidirectional pattern, a multidirectional pattern, a wave pattern, a pit pattern, or a combination thereof. The pattern may also be a random pattern. The purpose of this surface texture is to further promote turbulent airflow along the rear surface 12 of the hammer, thereby promoting a correlated reduction in air pressure along the corresponding portion of the leading surface of the hammer, as previously described. Another advantage of the first surface texture 17 when it includes notches or recesses is that it can reduce the overall mass of the hammer 10. Similarly, the first surface texture 17 may be provided in embodiments including one, three, four, or more notches 16.
[0053] Figure 7 It shows the reference Figure 6 The exemplary embodiment of the hammer 10, similar to the hammer described, but also includes a second surface texture 18 disposed to the recess 15, here disposed to each of its two notches 16. An extension of each notch 16 defines a notch plane R. The second surface texture 18 here includes a linear pattern of recesses recessed relative to the notch plane R. In other embodiments, the second surface texture 18 may include a pattern of protrusions or depressions, or combinations thereof, that protrude or retract relative to the notch plane R. The pattern of the second surface texture 18 may be an oriented pattern, such as in... Figure 7 In the illustrated embodiment. In other embodiments, the pattern of the second surface texture 18 may be, but is not limited to, a bidirectional pattern, a multidirectional pattern, a wave pattern, a pit pattern, or a combination thereof. In some embodiments, the pattern of the second surface texture 18 differs from the pattern of the first surface texture 17. Alternatively, the pattern of the second surface texture 18 may be the same as the pattern of the first surface texture 17, as shown in... Figure 7 As shown in the exemplary embodiment.
[0054] In some embodiments where the notch plane R is at least partially provided with the second surface texture 18, the notch plane R may also be provided with a third surface texture, which includes a pattern of protrusions or recesses or combinations thereof relative to the notch plane R, wherein the third surface texture has a pattern different from the pattern of the second surface texture 18. In some embodiments, the pattern of the third surface texture is different from the pattern of the first surface texture 17.
[0055] Now for reference Figure 8 A portion of a hammer 10 is shown, comprising a mounting portion consisting of three mounting parts 14 that extend discontinuously on a rear surface 12 of the hammer 10 in the direction of its longitudinal extension L. The rear surface 12 includes a base plane B from which the mounting parts 14 project. The hammer 10 also includes a recess comprising two notches 16 recessed relative to the base plane B. Each notch 16 defines a notch plane R. In this embodiment, Figure 8 A notch 16 on the left side extends laterally to the first longitudinal end 22 of the hammer 10. Figure 8 Another notch 16 on the right side has an extension in the lateral direction that is shorter than the lateral extension T of the hammer 10, and is centrally located relative to the lateral extension T. Therefore, within the concept of this disclosure, it is conceivable to provide at least two notches, wherein the lateral extensions of each notch are different, or to provide at least two notches, wherein the lateral extensions of each notch are the same or substantially the same.
[0056] The hammer 10 also includes a first surface texture 17 that extends along the longitudinal extension L of the hammer 10 on each longitudinal side of the mounting portion 14. The extension of the first surface texture 17 is partially interrupted by a notch 16. The first surface texture 17 is provided herein in the form of a wave pattern. More specifically, the wave pattern is a sine wave pattern. However, within the concept of this disclosure, it is also contemplated that the first surface texture 17 be provided in another wave pattern, such as, but not limited to, a trapezoidal wave pattern, a square wave pattern, a triangular wave pattern, and a sawtooth wave pattern.
[0057] Those skilled in the art will recognize that this disclosure is by no means limited to the preferred embodiments described above. Rather, as disclosed herein, many modifications and variations are possible within the scope of the appended claims. Furthermore, by studying the drawings, the disclosure, and the appended claims, those skilled in the art can understand and implement variations of the disclosed embodiments in practicing the claimed disclosure.
Claims
1. A hammer (10) for an impact crusher, said hammer having a longitudinal extension ( L ) and lateral extension ( T The hammer (10) includes a front guide surface and a rear surface (12), characterized in that, The rear surface (12) includes: Mounting portion (14), extending longitudinally along the hammer plate (10) L At least a portion of the extension of the lateral extension is used for mounting the hammer (10) to the impact crusher, wherein the mounting portion (14) is relative to the lateral extension. T Arranged in the center; and The recess (15) has a longitudinal extension along the hammer (10). L The first extension of part of ) E And includes at least one notch (16). Wherein, the recess (15) is relative to the longitudinal extension of the hammer plate ( L ) is arranged in the center, and the first extension ( E The rear surface (12) is defined by the unrecessed end (20) of the rear surface (12).
2. The hammer (10) according to claim 1, characterized in that, The recess (15) includes two or more notches (16), each notch having a longitudinal extension along the hammer (10). L The first extension of part of ) E ), and wherein the first extension of each of the two or more notches ( E The area is defined by the non-recessed portion of the rear surface (12).
3. The hammer (10) according to claim 1 or 2, characterized in that, The mounting portion (14) is composed of a plurality of mounting portions (14), which are located in the longitudinal extension of the hammer plate (10). L It extends discontinuously in the direction of ).
4. The hammer (10) according to claim 3, characterized in that, Each notch (16) is associated with a discontinuous extension (19) of the mounting portion (14), and the first extension of each notch (16) E (19) extends at least partially the length of the associated discontinuity.
5. The hammer (10) according to claim 3, characterized in that, Each notch (16) is centered relative to the length of its associated discontinuity (19).
6. The hammer (10) according to claim 3, characterized in that, Each notch (16) is relative to the lateral extension of the hammer (10). T It is set in the center.
7. The hammer (10) according to claim 3, characterized in that, Each notch (16) is located in the lateral extension of the hammer (10). T The extension in the direction of the hammer (10) exceeds the lateral extension of the hammer (10). T Half of ).
8. The hammer (10) according to claim 3, characterized in that, Each notch (16) is located in the lateral extension of the hammer (10). T The extension in the direction of the hammer (10) is equal to the lateral extension of the hammer (10). T ).
9. The hammer (10) according to claim 1, characterized in that, The mounting portion (14) protrudes at least partially from the base plane (B) of the rear surface (12), and each notch (16) is relative to the base plane (B). B (Concave) 10. The hammer (10) according to claim 9, characterized in that, It also includes a first surface texture (17), which extends along the longitudinal extension of the hammer (10) at the longitudinal lateral portion of the rear surface (12). L (17) extends, wherein the first surface texture (17) includes a pattern of protrusions or depressions or a combination thereof.
11. The hammer (10) according to claim 10, characterized in that, Each notch (16) defines a space from the base plane ( B The recessed notch plane ( R ), and wherein the notch plane ( R The surface at least partially has a second surface texture (18), the second surface texture including features relative to the notch plane. R A pattern of protrusions or depressions, or combinations thereof.
12. The hammer (10) according to claim 11, characterized in that, The pattern of the second surface texture (18) is different from the pattern of the first surface texture (17).
13. The hammer (10) according to claim 11, characterized in that, The pattern of the second surface texture (18) is the same as the pattern of the first surface texture (17).
14. The hammer (10) according to any one of claims 11-13, characterized in that, The notch plane ( R It also includes a third surface texture, the third surface texture comprising a surface texture relative to the notch plane ( R The third surface texture is a pattern of protrusions or depressions or combinations thereof, wherein the third surface texture has a pattern different from that of the second surface texture (18).
15. The hammer (10) according to claim 14, characterized in that, The pattern of each of the first surface texture (17), the second surface texture (18) and the third surface texture is selected from: directional pattern, bidirectional pattern, multidirectional pattern, wave pattern, pit pattern, random pattern or a combination thereof.
16. An impact crusher, characterized in that, Includes the hammer (10) according to any one of claims 1-15.