CN220177090U - Cutter shaft structure and crusher - Google Patents

Abstract

The utility model discloses a cutter shaft structure and a crusher. The cutter shaft structure comprises a cutter shaft, a plurality of rows of movable cutter assemblies and a positioning structure, wherein a plurality of groups of mounting platforms are arranged on the surface of the cutter shaft, are distributed along the circumferential direction of the cutter shaft and extend from one end of the cutter shaft to the other end of the cutter shaft; the movable cutter assemblies are arranged on the mounting platforms in a one-to-one correspondence manner, each movable cutter assembly comprises a plurality of cutter seats and a plurality of first cutting blades, the cutter seats extend from one end of the cutter shaft to the other end of the cutter shaft and are fixedly arranged on the corresponding mounting platform, and the first cutting blades are correspondingly arranged on the cutter seats, wherein the distances from the edge parts of the first cutting blades of the plurality of rows of movable cutter assemblies to the axis of the cutter shaft are the same; the positioning structure comprises a positioning pin, a first pin hole and a second pin hole, wherein the first pin hole is provided with a mounting platform, the second pin hole is arranged on the corresponding tool apron, and the positioning pin is arranged on the first pin hole and the second pin hole. The cutter shaft structure adopted by the utility model is simpler, and the processing difficulty of the cutter shaft structure is reduced.

Description

Cutter shaft structure and crusher

Technical Field

The utility model relates to the technical field of crushers, in particular to a cutter shaft structure and a crusher adopting the cutter shaft structure.

Background

With the rapid development of society, economy and industry for many years, the solid waste generation amount is becoming larger and larger. In the process of treating various solid wastes according to the principles of innocuity, recycling and reduction, the size of the wastes is generally required to be reduced to a certain size so as to ensure the smooth proceeding of the subsequent procedures of sorting, burning, compressing, landfill, stirring and the like. The single-shaft crusher has wide application in the field of RDF treatment in household garbage crushing manufacture. The main characteristics of the single-shaft crusher are stable discharge size, strong shearing capacity, high rotating speed of the cutter shaft and the like. The cutter shaft structure is used as a core component of the single-shaft crusher, and whether the design is reasonable or not directly influences parameters such as crushing effect, granularity and yield. In the prior art, the cutter shaft structure has a large number of cutter grains, each cutter grain needs to be processed and installed on the cutter shaft, the cutter shaft has large processing amount and processing difficulty, and the required processing equipment is complex.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the cutter shaft structure, so that the processing amount of the cutter shaft is reduced, and the processing difficulty of the cutter shaft structure is reduced.

The utility model further provides a crusher adopting the cutter shaft structure.

The cutter shaft structure comprises a cutter shaft, a plurality of rows of movable cutter assemblies and a positioning structure, wherein a plurality of groups of mounting platforms are arranged on the surface of the cutter shaft, are distributed along the circumferential direction of the cutter shaft and extend from one end of the cutter shaft to the other end of the cutter shaft; the multiple rows of movable cutter assemblies are arranged on multiple groups of mounting platforms in a one-to-one correspondence manner, each row of movable cutter assemblies comprises multiple cutter seats and multiple first cutting blades, the multiple cutter seats extend from one end of the cutter shaft to the other end of the cutter shaft, the multiple cutter seats are fixedly arranged on the corresponding mounting platforms, and the multiple first cutting blades are correspondingly arranged on the multiple cutter seats, wherein the distances from the edge parts of the multiple rows of movable cutter assemblies to the axis of the cutter shaft are the same; the positioning structure comprises a positioning pin, a first pin hole and a second pin hole, wherein the first pin hole is formed in the mounting platform, the second pin hole is formed in the corresponding tool apron, and the positioning pin is formed in the first pin hole and the second pin hole.

The cutter shaft structure provided by the embodiment of the utility model has at least the following beneficial effects: the cutter shaft structure adopted by the cutter shaft structure is simpler, so that the processing amount of the cutter shaft is mostly converted into the processing of the cutter shaft, the requirement on equipment for processing the cutter shaft is further reduced, and the cutter shaft can be completed only by a small numerical control processing center, so that the processing difficulty of the cutter shaft structure is reduced; and after all the cutting blades are installed, the distance from the edge parts of the cutting blades to the axis of the cutter shaft is the same, so that the distance between the cutting blades on the movable cutter assembly and the fixed cutter assembly can be adjusted to be very small (0.05 mm), and the cutting of the crusher is easier, and the cutting effect is better.

According to some embodiments of the utility model, the plurality of first cutting blades of each row of the movable blade assembly are spirally extended along the surface of the arbor so that a line between edge portions of the first cutting blades at both ends has a predetermined angle with the arbor axis.

According to some embodiments of the utility model, the first cutting blades of the moving blade assemblies of adjacent two rows are opposite in helical direction along the arbor surface.

According to some embodiments of the utility model, the tool holder is welded to the mounting platform.

According to some embodiments of the utility model, welding grooves are formed on two sides of the surface, which is contacted with the mounting platform, of the tool apron, and the welding grooves extend along the arrangement direction of the tool apron.

According to some embodiments of the utility model, the tool holder is locked to the arbor by a pretension to prevent the tool holder from running during welding.

According to a second aspect of the utility model, a crusher comprises a cutter box main body, a fixed cutter assembly and a cutter shaft structure of any one of the above, wherein the cutter box main body is provided with a crushing space; the cutter shaft structure is rotatably arranged in the crushing space; the stationary knife assembly is arranged on the knife box main body and is positioned in the crushing space, the stationary knife assembly extends along the axial direction of the knife shaft, and a preset interval is reserved between the stationary knife assembly and the edge part of the first cutting blade.

The crusher provided by the embodiment of the utility model has at least the following beneficial effects: the cutter shaft structure adopted by the crusher is simpler, so that the processing amount of the cutter shaft is largely converted into the processing of the cutter holder, the requirement on equipment for processing the cutter shaft is further reduced, and the cutter holder can be completed only by a small numerical control processing center, so that the processing difficulty of the cutter shaft structure is reduced; and after all the cutting blades are installed, the distance from the edge parts of the cutting blades to the axis of the cutter shaft is the same, so that the distance between the cutting blades on the movable cutter assembly and the fixed cutter assembly can be adjusted to be very small (0.05 mm), and the cutting of the crusher is easier, and the cutting effect is better.

According to some embodiments of the utility model, the stationary knife assembly comprises an adjusting seat, a second cutting blade and a pressing plate, wherein the adjusting seat is arranged on the knife box main body, and is provided with an adjusting part for adjusting the interval between the adjusting seat and the movable knife assembly; the second cutting piece is fixedly arranged on the adjusting seat; the clamp plate is located on the regulation seat, and through mounting with tool box main part fixed connection, the clamp plate is used for with the regulation seat is fixed in the tool box main part.

According to some embodiments of the utility model, the adjusting part is an avoidance hole formed in the adjusting seat, and the fixing piece is penetrated through the avoidance hole.

According to some embodiments of the utility model, the adjusting seat is provided with a mounting position, the mounting position is provided with a limiting part, the second cutting piece is mounted on the mounting position, and the limiting part is used for limiting the second cutting piece so as to protect the fixing piece; the first and second cutting blades are identical in structure so that the first and second cutting blades can be interchanged.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the accompanying drawings and examples, in which:

fig. 1 is a schematic perspective view of a cutter shaft structure according to an embodiment of the present utility model;

fig. 2 is a cross-sectional view of the arbor structure of the embodiment of fig. 1;

FIG. 3 is an enlarged view of FIG. 2 at A;

fig. 4 is a schematic perspective view of a moving blade assembly with a knife shaft structure according to an embodiment of the present utility model;

fig. 5 is a schematic perspective view of a moving blade assembly with a knife shaft structure according to another embodiment of the present utility model;

FIG. 6 is a cross-sectional view of a moving blade assembly of a arbor structure in accordance with an embodiment of the present utility model;

FIG. 7 is a schematic perspective view showing a partial structure of a crusher according to an embodiment of the present utility model;

FIG. 8 is a schematic perspective view of a stationary knife assembly of a crusher according to one embodiment of the utility model;

FIG. 9 is a schematic perspective view of a stationary knife assembly of a crusher in accordance with another embodiment of the utility model in another view;

fig. 10 is a cross-sectional view of a stationary knife assembly of a crusher in accordance with an embodiment of the utility model.

Reference numerals:

a cutter shaft structure 10;

the cutter shaft 100, the mounting platform 110, the first pin hole 111 and the threaded hole 112;

the movable cutter assembly 200, the cutter holder 210, the welding groove 211, the second pin hole 212, the pretensioner 213, the positioning pin 214, the first cutting blade 220, and the blade 221;

a first lock bolt 300, a first nut 310, a first lockwasher 320;

crusher 400, tool box body 410, crushing space 411;

the fixed cutter assembly 500, the adjusting seat 510, the mounting position 511, the avoidance hole 512, the limiting part 513, the second cutting blade 520, the pressing plate 530 and the fixing piece 540;

second lockbolt 600, second nut 610, second lockwasher 620.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description and simplification of the description, and does not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the utility model.

In the description of the present utility model, the description of the first and second is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implying the number of technical features indicated or the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

With the rapid development of society, economy and industry for many years, the solid waste generation amount is becoming larger and larger. In the process of treating various solid wastes according to the principles of innocuity, recycling and reduction, the size of the wastes is generally required to be reduced to a certain size so as to ensure the smooth proceeding of the subsequent procedures of sorting, burning, compressing, landfill, stirring and the like.

In the prior art, a crushing system is generally used for crushing solid wastes. A commonly used crushing system is a single shaft shredder. The cutter shaft is a core component of the single-shaft shredder, and whether the design is reasonable or not directly influences parameters such as crushing effect, granularity, yield and the like. The existing single-shaft shredder has different cutter shaft structural forms, wherein one cutter shaft structure is that a plurality of rows of movable cutter assemblies are arranged on the cutter shaft along the circumferential direction, each row of movable cutter assemblies comprises a plurality of cutter seats and a plurality of cutting pieces, the cutter shaft is provided with a groove, and each cutter seat corresponds to one groove. Therefore, the cutter shaft has large processing amount and processing difficulty, and the diameter of the cutter shaft is large, so that processing equipment required for processing the cutter shaft is complex, the processing cost of the cutter shaft is increased, and the manufacturing cost of the crusher is further increased.

Therefore, the present utility model provides a cutter shaft structure 10, which reduces the processing difficulty, so as to reduce the processing cost of the cutter shaft 100, and further reduce the manufacturing cost of the crusher 400.

Referring to fig. 1, 2 and 3, the cutter shaft structure 10 according to the first aspect of the present utility model includes a cutter shaft 100, a plurality of rows of cutter assemblies 200 and a positioning structure, a plurality of sets of mounting platforms 110 are disposed on the surface of the cutter shaft 100, the plurality of sets of mounting platforms 110 are arranged along the circumferential direction of the cutter shaft 100, each set of mounting platforms 110 extends from one end of the cutter shaft 100 to the other end, the mounting platforms 110 are provided with a plurality of first pin holes 111 and a plurality of threaded holes 112, and the plurality of first pin holes 111 and the plurality of threaded holes 112 respectively correspond to a plurality of tool holders 210 of the movable cutter assemblies 200.

Referring to fig. 1 and 3, the multiple rows of movable cutter assemblies 200 are disposed on the multiple sets of mounting platforms 110 in a one-to-one correspondence manner, each row of movable cutter assemblies 200 includes a plurality of cutter holders 210 and a plurality of first cutting blades 220, and the plurality of cutter holders 210 extend from one end of the cutter shaft 100 to the other end, are fixedly disposed on the corresponding mounting platforms 110, and the plurality of first cutting blades 220 are correspondingly disposed on the plurality of cutter holders 210. The tool apron 210 is provided with a second pin hole 212, the first pin hole 111 and the second pin hole 212 are correspondingly arranged, a positioning pin 214 is arranged in the first pin hole 111 and the second pin hole 212, and the tool apron 210 can be accurately positioned on the cutter shaft 100 by arranging the first pin hole 111, the second pin hole 212 and the positioning pin 214 so as to be beneficial to the fixation of the tool apron 210 on the cutter shaft 100.

Referring to fig. 4, 5 and 6, the tool holder 210 and the first cutting blade 220 are provided with through holes in which the first locking bolts 300 are penetrated, and the first cutting blade 220 is fixed to the corresponding tool holder 210 by the first locking bolts 300 and the first nuts 310. Referring to fig. 6, the first locking bolt 300 is sleeved with a first locking washer 320, and the first locking washer 320 is used to facilitate the assembly and disassembly of the first cutting blade 220 and to prevent the first nut 310 from being released.

After the multiple rows of moving blade assemblies 200 are mounted on the arbor 100, the distance from the edge 221 of the first cutting blade 220 of each row of moving blade assemblies 200 to the axis of the arbor 100 is the same, so that when the arbor structure 10 is assembled to the crusher 400, the spacing between each moving blade assembly 200 and the stationary blade assembly 500 is consistent, so that the spacing between the cutting blades of the moving blade assemblies 200 and the stationary blade assembly 500 is adjusted to be small.

The cutter shaft 100 adopted by the utility model has a simpler structure, and only the mounting platform and the pin holes are required to be machined on the surface of the cutter shaft 100 during machining, so that the machining quantity of the cutter shaft 100 is mostly converted into the machining of the cutter holder 210, the requirement on equipment for machining the cutter shaft 100 is further reduced, and the cutter holder 210 can be finished only by a small numerical control machining center, thereby reducing the machining difficulty of the cutter shaft structure 10; and, after all the cutting blades are mounted, the distance from the blade 221 of the cutting blade to the axis of the arbor 100 is the same, so that the distance between the movable blade assembly 200 and the cutting blade on the fixed blade assembly 500 can be adjusted to be very small (0.05 mm), thereby facilitating the cutting of the crusher 400 and further improving the cutting effect of the crusher 400.

Referring to fig. 1, in some embodiments, the plurality of first cutting blades 220 of each row of moving blade assemblies 200 are spirally extended along the surface of the cutter shaft 100, so that the line of the edge parts 221 of the first cutting blades 220 arranged side by side in each row of moving blade assemblies 200 is in a substantially spiral shape, and a predetermined angle is formed between the line of the edge parts 221 of the first cutting blades 220 positioned at both ends and the axis of the cutter shaft 100, and when the moving blade assemblies 200 are matched with the fixed blade assemblies 500, a cutting mode of a scissors mode is formed, so that the crusher 400 can cut materials more easily, and the cutting efficiency of the crusher 400 is improved.

It should be noted that, to make the line of the edge portions 221 of the first cutting blades 220 disposed side by side in each row of the movable blade assemblies 200 have a substantially spiral shape, the inclination angle of the bottom surface of the tool holder 210 with respect to the side surface of the movable blade assemblies 200 at different positions may be set, wherein the bottom surface of the tool holder 210 is the surface contacting the mounting platform 110, so that the bottom surfaces of the different tool holders 210 in the same row have a certain angular relationship with the side surface.

It should be noted that, the angle between the line between the edge portions 221 of the first cutting blades 220 at both ends and the axis of the arbor 100 may be set according to the specific situation, such as the nature of the solid material, and will not be described in detail herein.

Referring to fig. 1, in some embodiments, the first cutting blades 220 of the movable blade assemblies 200 of two adjacent rows are opposite in spiral direction along the surface of the cutter shaft 100, so that when the cutter shaft structure 10 is assembled to the crusher 400 for crushing operation, the cutting mode of the scissors pattern formed between the movable blade assemblies 200 and the fixed blade assemblies 500 can be alternately changed from two ends of the cutter shaft 100, thereby further improving the cutting efficiency of the crusher 400.

In some embodiments, referring to fig. 5, in order to facilitate the welding of the tool holder 210 to the arbor 100 and reduce the damage of the welding operation to the arbor 100, welding grooves 211 are formed on two sides of the surface of the tool holder 210 contacting the mounting platform 110, the welding grooves 211 extend along the arrangement direction of the tool holder 210, and when the tool holder 210 is welded to the arbor 100, the welding material fills the welding grooves 211, so that the welding between the tool holder 210 and the arbor 100 is more firm.

Referring to fig. 3, in some embodiments, the tool holder 210 is provided with a pre-tightening member 213, by which the tool holder 210 can be locked to the arbor 100 to prevent the tool holder 210 from running during welding.

As shown in fig. 3, the pretension 213 may be a pretension bolt that is inserted through the tool holder 210 and is screwed into the threaded hole 112 in the mounting platform 110.

Referring to fig. 7, a crusher 400 according to a second aspect of the present utility model includes a cutter case body 410, a stationary cutter assembly 500, and any one of the cutter shaft structures 10, wherein the cutter case body 410 is provided with a crushing space 411, and the cutter shaft structure 10 is rotatably provided in the crushing space 411; the stationary knife assembly 500 is disposed in the knife box main body 410 and is disposed in the crushing space 411, the stationary knife assembly 500 extends along the axial direction of the knife shaft 100, a predetermined distance is provided between the stationary knife assembly 500 and the blade 221 of the first cutting blade 220, and when the knife shaft structure 10 rotates, the movable knife assembly 200 cooperates with the stationary knife assembly 500 to crush solid materials.

The cutter shaft structure 10 adopted by the crusher 400 is simpler, so that the processing amount of the cutter shaft 100 is largely converted into processing of the cutter holder 210, the requirements on equipment for processing the cutter shaft 100 are reduced, the cutter holder 210 can be completed only by a small numerical control processing center, and the processing difficulty of the cutter shaft structure 10 is reduced; and, after all the cutting blades are mounted, the distance from the edge 221 of the cutting blade to the axis of the arbor 100 is the same, so that the distance between the cutting blades on the movable blade assembly 200 and the fixed blade assembly 500 can be adjusted to be very small (0.05 mm), thereby facilitating the cutting of the crusher 400 and having better cutting effect.

Referring to fig. 8, 9, and 10, in some embodiments, the stationary blade assembly 500 includes an adjustment seat 510, a second cutting blade 520, and a pressing plate 530, the adjustment seat 510 is provided to the blade case body 410, the adjustment seat 510 is provided with an adjustment portion for adjusting a distance between the adjustment seat 510 and the movable blade assembly 200; the second cutting blade 520 is fixedly arranged on the adjusting seat 510; the pressing plate 530 is disposed on the adjusting seat 510 and is fixedly connected with the tool box body 410 through the fixing member 540, the pressing plate 530 is used for fixing the adjusting seat 510 to the tool box body 410, and the pressing plate 530 abuts against a part of the surface of the second cutting blade 520, so that the second cutting blade 520 is partially accommodated between the pressing plate 530 and the adjusting seat 510, and therefore the pressing plate 530 also plays a role of protecting the second cutting blade 520, the cutting surface of the second cutting blade 520 which does not participate in cutting is not scratched by materials, and the corner of the cutting surface which does not participate in cutting is kept sharp.

Specifically, the adjusting seat 510 is provided with an installation position 511, the second cutting blade 520 and the adjusting seat 510 are provided with through holes, the through holes are internally provided with second locking bolts 600 in a penetrating manner, and the second cutting blade 520 is fixed on the adjusting seat 510 through the second locking bolts 600 and the second nuts 610. Referring to fig. 10, a second locking washer 620 is sleeved on the second locking bolt 600, and the second locking washer 620 is used to facilitate the assembly and disassembly of the second cutting blade 520 and to prevent the second nut 610 from being released. The pressing plate 530 is provided with a through hole, and in this embodiment, the fixing member 540 is a bolt, which is inserted through the through hole and is screwed with the tool case body 410.

Referring to fig. 9 and 10, in some embodiments, the adjusting portion is a hole 512 formed in the adjusting seat 510, the fixing member 540 is inserted into the hole 512, when the distance between the fixed cutter assembly 500 and the movable cutter assembly 200 needs to be adjusted, the fixing member 540 is unscrewed first, the fixing of the adjusting seat 510 by the pressing plate 530 is released, the adjusting seat 510 is moved, the hole 512 can be avoided by the bolt as the fixing member 540, so that the purpose of adjusting the distance between the adjusting seat 510 and the movable cutter assembly 200 is achieved, after the distance is adjusted, the fixing member 540 is screwed, the pressing plate 530 compresses the adjusting seat 510, and the adjusting seat 510 is fixed on the cutter case main body 410 again by the pressing plate 530.

Referring to fig. 8 and 10, the mounting position 511 is provided with a limiting portion 513, and when the second cutting blade 520 is mounted on the mounting position 511, the limiting portion 513 can limit the second cutting blade 520, so as to prevent the second cutting blade 520 from cutting off the fixing member 540 when being stressed too much, and thus, the fixing member 540 is protected.

As shown in fig. 10, the mounting position 511 is a recess provided on the adjustment seat 510, and a side wall of the recess is provided as a limiting portion 513, thereby simplifying the structure of the stationary knife assembly 500.

In some embodiments, the first and second cutting blades 220 and 520 are identical in structure, in other words, the first and second cutting blades 220 and 520 are identical components, whereby the first and second cutting blades 220 and 520 can be interchanged, and the design procedure of the components is reduced, simplifying the manufacturing process of the first and second cutting blades 220 and 520.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

Of course, the present utility model is not limited to the above-described embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present utility model, and these equivalent modifications or substitutions are included in the scope of the present utility model as defined in the appended claims.

Claims (10)

1. The utility model provides a arbor structure, is applied to breaker, its characterized in that includes:

the surface of the cutter shaft is provided with a plurality of groups of mounting platforms, and the plurality of groups of mounting platforms are distributed along the circumferential direction of the cutter shaft and extend from one end of the cutter shaft to the other end of the cutter shaft;

the multiple rows of movable cutter assemblies are arranged on multiple groups of mounting platforms in a one-to-one correspondence manner, each row of movable cutter assemblies comprises multiple cutter seats and multiple first cutting blades, the multiple cutter seats extend from one end of the cutter shaft to the other end of the cutter shaft, the multiple cutter seats are fixedly arranged on the corresponding mounting platforms, and the multiple first cutting blades are correspondingly arranged on the multiple cutter seats, wherein the distances from the edge parts of the multiple rows of movable cutter assemblies to the axis of the cutter shaft are the same;

the positioning structure comprises a positioning pin, a first pin hole and a second pin hole, wherein the first pin hole is formed in the mounting platform, the second pin hole is formed in the corresponding tool apron, and the positioning pin is formed in the first pin hole and the second pin hole.

2. A arbor structure according to claim 1, wherein the plurality of first cutting blades of each row of the movable cutter assembly are spirally extended along the surface of the arbor so that a line between the blade portions of the first cutting blades at both ends has a predetermined angle with the arbor axis.

3. A arbor structure according to claim 2, wherein the first cutting blades of the moving blade assemblies of adjacent rows are counter-directed along the spiral direction of the arbor surface.

4. A arbor structure according to claim 1, wherein the tool-holder is welded to the mounting platform.

5. The arbor structure of claim 4, wherein welding grooves are formed in both sides of the surface of the tool holder contacting the mounting platform, and the welding grooves extend along the arrangement direction of the tool holder.

6. A arbor structure according to claim 4 or 5, characterised in that the tool holder is locked to the arbor by means of a pretension to prevent the tool holder from running out during welding.

7. A crusher, comprising:

the cutter box body is provided with a crushing space;

a cutter shaft structure according to any one of claims 1 to 6, which is rotatably provided in the crushing space; and

the fixed cutter assembly is arranged in the cutter box main body and positioned in the crushing space, the fixed cutter assembly extends along the axial direction of the cutter shaft, and a preset interval is reserved between the fixed cutter assembly and the edge part of the first cutting blade.

8. The crusher of claim 7, wherein the stationary knife assembly comprises:

the adjusting seat is arranged on the tool box main body and is provided with an adjusting part, and the adjusting part is used for adjusting the distance between the adjusting seat and the movable tool assembly;

the second cutting piece is fixedly arranged on the adjusting seat;

the pressing plate is arranged on the adjusting seat and fixedly connected with the tool box main body through the fixing piece, and the pressing plate is used for fixing the adjusting seat on the tool box main body.

9. The crusher of claim 8, wherein the adjustment portion is a relief hole provided in the adjustment seat, and the fixing member is disposed through the relief hole.

10. The crusher of claim 8, wherein the adjustment seat is provided with a mounting location, the mounting location is provided with a limiting portion, the second cutting blade is mounted on the mounting location, and the limiting portion is used for limiting the second cutting blade so as to protect the fixing piece; the first and second cutting blades are identical in structure so that the first and second cutting blades can be interchanged.