CN215561512U - Cutter structure and crushing device - Google Patents

Abstract

The utility model discloses a cutter structure and a crushing device. The cutter structure comprises a main body, a first cutter and a second cutter, wherein the first cutter and the second cutter are arranged on the main body; and the first insert is located farther from the axial center of the main body than the second insert. Specifically, be equipped with a plurality of bulge loops on the main part, it is a plurality of the bulge loop sets up along the axial direction interval of main part, and first cutter sets up on the bulge loop, and forms the holding tank between the adjacent bulge loop, the second cutter sets up in the holding tank for the position of first cutter is higher than the second cutter (being located more far away from the position in main part axle center promptly). Through setting up first knife spare and the second knife spare of position height difference for not only can cut up the material when cutter structure and stationary knife cooperation, still tear the material.

Description

Cutter structure and crushing device

Technical Field

The utility model relates to a papermaking equipment technical field, concretely relates to cutter structure and breaker.

Background

Crushing is a process of applying external force on a crushed material to overcome the cohesion among material molecules and break a large material into a plurality of small pieces.

The cutter design of the existing crushing device is relatively simple, so that the crushing effect is general, and the material cannot be effectively crushed to an ideal size.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides a cutter structure and a crushing device for solving at least one problem existing in the prior art.

In a first aspect, the present disclosure provides a cutter structure comprising a body, a first cutter and a second cutter, the first cutter and the second cutter being disposed on the body; and the first insert is located farther from the axis of the main body in the radial direction than the second insert and than the second insert.

In some embodiments, the main body is provided with a plurality of convex rings, the convex rings are distributed at intervals along the axial direction of the main body, the first cutter is arranged on the convex rings, a containing groove is formed between the adjacent convex rings, and the second cutter is arranged in the containing groove.

In some embodiments, a plurality of first inserts and second inserts are included.

In some embodiments, one or more first blades at the same cross-section of the body form a first cutter ring, one or more second blades at the same cross-section of the body form a second cutter ring, and the first cutter ring and the second cutter ring do not overlap in the axial direction.

In some embodiments, the first cutter ring and the second cutter ring are alternately arranged along the axial direction.

In some embodiments, a first blade face is provided on the body such that the first blade face cooperates with the first insert to form the recess.

In some embodiments, a second tool face is provided on the body such that the second tool face cooperates with the second insert to form the recess.

In some embodiments, the main body is provided with a mounting seat, the mounting seat and the first cutter are sequentially arranged along the rotation direction of the main body and are abutted against each other, and the mounting seat and the second cutter are sequentially arranged along the rotation direction of the main body and are abutted against each other.

In some embodiments, the mount is removably coupled to the first blade and the mount is removably coupled to the second blade.

In some embodiments, the first blade is provided with a first blade edge and a second blade edge, the first blade edge is detachably mounted on the main body, the first blade edge comprises a first mounting state and a second mounting state on the main body and can be switched between the first mounting state and the second mounting state, when the first blade edge is in the first mounting state, the first blade edge is matched with the fixed blade structure to crush the material, and the second blade edge is located closer to the axis of the main body than the first blade edge; when the first cutter piece is in a second installation state, the second cutter edge and the fixed cutter structure are matched to crush materials, and compared with the second cutter edge, the first cutter edge is located at a position closer to the axis of the main body.

In some embodiments, the first blade is mounted to the mounting block by a bolt, and the first blade has a 180 ° rotationally symmetric configuration with the bolt hole located in the center of the first blade.

In some embodiments, the second knife element is provided with a third knife edge and a fourth knife edge, the second knife element is detachably mounted on the main body, the second knife element comprises a third mounting state and a fourth mounting state on the main body and can be switched between the third mounting state and the fourth mounting state, when the second knife element is in the third mounting state, the third knife edge is matched with the fixed knife structure to crush the material, and the fourth knife edge is positioned closer to the axis of the main body than the third knife edge; when the second knife element is in the first installation state, the fourth knife edge is matched with the fixed knife structure to crush materials, and compared with the fourth knife edge, the third knife edge is positioned at a position closer to the axis of the main body.

In some embodiments, the second insert is mounted to the mount by a bolt, and the second insert is a 180 ° rotationally symmetric structure with the bolt hole located in the center of the second insert.

In some embodiments, one or more sets of first blades are included, the first blades including a plurality of axially distributed first blades, and one or more sets of second blades including a plurality of axially distributed second blades.

In some embodiments, the first blades in the same first blade group are arranged in a V-shape, and the second blades in the same second blade group are arranged in a V-shape

In some embodiments, the first and second sets of blades alternate in a circumferential direction of the body.

In a second aspect, the present disclosure provides a crushing device, which includes a body, a first driving device, a fixed cutter structure and a cutter structure in any of the above embodiments, wherein the cutter structure is rotatably mounted on the body, the first driving device is used for driving the cutter structure to rotate, the fixed cutter structure is mounted on the body, and the cutter structure and the fixed cutter structure are mutually matched to crush a material.

In some embodiments, the device further comprises a swaging arm and a second driving device, wherein the second driving device is used for controlling the swaging arm to reciprocate so as to push the material in the body between the cutter structure and the fixed cutter structure.

In some embodiments, the stationary knife structure is provided with a protrusion for cooperating with the second knife element for crushing the material and a recess for cooperating with the first knife element for crushing the material.

In some embodiments, the projections and the recesses in the stationary blade structure alternate.

Has the advantages that: through setting up first knife spare and the second knife spare of difference in height for not only can cut up the material when cutter structure and stationary knife cooperation, still tear the material.

Drawings

Fig. 1 is a schematic structural diagram of a cutter structure and a fixed cutter structure in one embodiment of the present disclosure.

FIG. 2 is a schematic view of a partial surface structure of a cutter structure according to one embodiment of the present disclosure.

Fig. 3 is a schematic structural diagram of a crushing device in one embodiment of the disclosure.

Fig. 4 is a partial structural schematic view of a stationary knife structure in one embodiment of the present disclosure.

FIG. 5 is a schematic view of a first insert according to one embodiment of the present disclosure.

FIG. 6 is a schematic view of a second insert according to one embodiment of the present disclosure.

The labels in the figure are: 1. a cutter structure; 11. a first insert; 111. a first blade edge; 112. a second knife edge; 113. bolt holes; 114. a side edge of the first insert; 12. a second insert; 121. a third knife edge; 122. a fourth knife edge; 123. bolt holes; 13. a convex ring; 14. accommodating grooves; 15. a mounting seat; 16. a main body; 2. a fixed cutter structure; 21. a boss portion; 22. a groove; 3. a material pressing arm; 4. a feed hopper; 5. a first driving device; 51. a reduction gearbox; 6. a screen frame carrier; 7. a slag discharge door; 8. a treatment chamber; 9. a body.

Detailed Description

It should be understood that the exemplary embodiments described herein should be considered in descriptive sense only and not for purposes of limitation. Descriptions of features or aspects within each exemplary embodiment should generally be considered as available for similar features or aspects in other exemplary embodiments.

The foregoing description is provided with reference to the accompanying drawings to assist in a comprehensive understanding of various embodiments of the utility model as defined by the claims. It includes various specific details to assist in this understanding, but these details should be construed as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that changes and modifications of the various embodiments described herein can be made without departing from the scope of the utility model, which is defined by the appended claims. Moreover, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.

The terms and words used in the following description and claims are not limited to the written meaning, but are used only by the inventors to allow a clear and consistent understanding of the utility model. Accordingly, it will be apparent to those skilled in the art that the following descriptions of the various embodiments of the present invention are provided for illustration only and not for the purpose of limiting the utility model as defined by the appended claims.

Throughout the description and claims of this specification, the words "comprise" and "contain" and variations of the words, for example "comprising" and "comprises", mean "including but not limited to", and are not intended to (and do not) exclude other components, integers or steps.

Features, integers or characteristics described in conjunction with a particular aspect, embodiment or example of the utility model are to be understood to be applicable to any other aspect, embodiment or example described herein unless incompatible therewith.

It is to be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. In the present invention, the expression "or" comprises any and all combinations of the words listed together. For example, "a or B" may comprise a or B, or may comprise both a and B.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present specification and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Fig. 1 is a schematic structural diagram of a cutter structure and a fixed cutter structure in one embodiment of the present disclosure. FIG. 2 is a schematic view of a partial surface structure of a cutter structure according to one embodiment of the present disclosure. As shown in fig. 1 and 2, the cutter structure 1 includes a main body 16, a first insert 11 and a second insert 12, wherein the first insert 11 and the second insert 12 are disposed on the main body 16; and the first insert 11 is located farther from the axial center of the main body in the radial direction than the second insert 12. It should be understood that the body 16 is a cylinder-like structure, which should be circular in cross-section.

More specifically, the main body 16 is provided with a plurality of protruding rings 13, the plurality of protruding rings 13 are arranged at intervals in the axial direction of the main body 16, the first insert 11 is arranged on the protruding rings 13, receiving grooves 14 are formed between adjacent protruding rings 13, and the second insert 12 is arranged in the receiving grooves 14. The design of the protruding ring 13 and the receiving groove 14 allows the first insert 11 to be located at a higher position (a position farther from the axial center of the main body) and the second insert 12 to be located at a lower position (a position closer to the axial center of the main body).

It should be understood that in addition to the design of the male ring 13 and the receiving groove 14, in some embodiments, other padding structures may be specifically provided to pad the first blade 11 further away from the axial center of the main body. Alternatively, the height of the first blade 11 is adjusted so that the tip of the first blade 11 may be farther from the axis. It should be understood that the height referred to herein is the distance of the first or second insert from the axial center in the radial direction.

Alternatively, the cutter structure 1 includes a plurality of first cutters 11 and second cutters 12, which are arranged by a combination of the plurality of first cutters 11 and the plurality of second cutters 12 to form the cutter structure 1. As in some embodiments, one or more first inserts 11 located at the same cross-section of the body 16 constitute a first cutter ring, and one or more second inserts 12 located at the same cross-section of the body 16 constitute a second cutter ring, the first cutter ring alternating with the second cutter ring in the axial direction. In some embodiments with a male ring 13 and a female receiving slot 14, a first insert 11 on the same male ring 13 constitutes a first insert ring and a second insert on the same female receiving slot 14 constitutes a second insert ring. It should be understood that although the first cutter ring and the second cutter ring are alternately arranged along the axial direction as shown in fig. 1 and 2, in some embodiments, the first cutter ring and the second cutter ring may not be arranged at intervals, such as two first cutter rings arranged in two adjacent second cutter rings, and the like.

In some embodiments, the body 16 is provided with a first blade surface such that the first blade surface cooperates with the first insert 11 to form a recess.

In some embodiments, a second tool face is provided on the body 16 such that the second tool face cooperates with the second insert 12 to form a recess.

Optionally, with continued reference to fig. 1 and 2, the main body 16 is provided with a mounting seat 15, the mounting seat 15 and the first cutting element 11 are sequentially arranged along the rotation direction of the main body 16 and abut against each other, and the mounting seat 15 and the second cutting element 12 are sequentially arranged along the rotation direction of the main body 16 and abut against each other. Through the design, when the cutter structure is used for crushing materials, the first cutter 11 and the second cutter 12 are matched with the fixed cutter structure 2 to crush the materials, and the mounting seat 15 positioned behind the rotation directions of the first cutter 11 and the second cutter 12 can provide a supporting force for the first cutter 11 and the second cutter 12, so that the first cutter 11 and the second cutter 12 are prevented from being bent backwards and deformed due to the action of external force when the materials are crushed. While optionally the first insert 11 is removably attached to the mount 15 and the second insert 12 is removably attached to the mount 15 for ease of maintenance and replacement of the first insert 11 with the second insert 12.

In some embodiments, as shown in fig. 5, the first knife 11 is provided with a first knife edge 111 and a second knife edge 112, and the first knife 11 is detachably mounted on the main body 16, and the first knife 11 comprises a first mounting state and a second mounting state on the main body 16 and can be switched between the first mounting state and the second mounting state, when the first knife is in the first mounting state, the first knife edge 111 cooperates with the fixed knife structure to crush the material, and the second knife edge 112 is located closer to the axial center of the main body 16 than the first knife edge 111; when the first blade is in the second installation state, the second blade 112 cooperates with the stationary blade structure to break up the material, and the first blade 111 is located closer to the axis of the main body 16 than the second blade 112. Since the second knife edge 112 is located closer to the axis of the main body 16 in the first installation state, when the main body 16 rotates, the second knife edge 112 is more difficult to cooperate with the stationary knife structure to crush the material, resulting in lower wear thereof, and vice versa. Thus, depending on the mounting position, the first and second knife edges 111, 112 have different degrees of wear, and the user can switch the first insert between the first and second mounting states as appropriate.

Specifically, the first cutter 11 is mounted on the mounting base through a bolt, the first cutter has a 180-degree rotationally symmetrical structure, and the bolt hole 113 is located in the center of the first cutter 11. Thus, when the first knife edge 111 wears out to be difficult to use, the user can rotate the first knife element 11 to switch it from the first mounting state to the second mounting state as the case may be, mainly using the second knife edge 112 to break the material.

Similarly, in some embodiments, as shown in fig. 6, the second knife element 12 is provided with a third knife edge 121 and a fourth knife edge 122, and the second knife element 12 is detachably mounted on the main body 16, and the second knife element 12 includes a third mounting state and a fourth mounting state on the main body 16 and can be switched between the third mounting state and the fourth mounting state, when the second knife element 12 is in the third mounting state, the third knife edge 121 cooperates with the fixed knife structure to crush the material, and the fourth knife edge 122 is located closer to the axial center of the main body than the third knife edge 121; when the second knife element 12 is in the first installation state, the fourth knife edge 122 is matched with the fixed knife structure to crush the material, and compared with the fourth knife edge 122, the third knife edge 121 is located at a position closer to the axis of the main body. Specifically, the bolt is mounted to the mounting seat, and the second insert 12 has a 180 ° rotational symmetric structure, and the bolt hole 123 is located at the center of the second insert 12.

It should be understood that in other embodiments, the first and second blades 11, 12 may be configured and shaped as well as conventional moving blade designs.

In some embodiments, one or more sets of first cutting elements are included, the first cutting elements are composed of a plurality of axially distributed first cutting elements 11, and the first cutting elements 11 in the same first cutting element set are arranged in a V shape.

In some embodiments, one or more second groups of inserts are included, the second groups of inserts being formed from a plurality of axially-distributed second inserts 12, the second inserts 12 in the same second group being in a V-shaped arrangement. The arrangement can ensure that the plurality of first cutters 11 and/or the plurality of second cutters 12 are not overlapped in the same axial direction as much as possible, and the condition that the plurality of first cutters 11 and/or the plurality of second cutters 12 are matched with the fixed cutter assembly to shear and crush the material is avoided, so that the load of equipment is reduced, the labor is saved, and the service life of the cutter assembly is prolonged.

In some embodiments, the first and second sets of blades alternate in a circumferential direction of the body. When the main body rotates, the first cutter set and the fixed cutter structure are matched to crush materials, then the second cutter set is matched with the fixed cutter structure to crush the materials along with the rotation of the main body, and then the first cutter set is matched with the fixed cutter structure to crush the materials along with the rotation of the main body, so that the first cutter set and the second cutter set crush the materials alternately.

A crushing device is shown in fig. 3 and comprises a body 9, a first driving device 5, a fixed cutter structure 2 and a cutter structure 1 in any one of the above embodiments, wherein the cutter structure 1 is rotatably mounted on the body 9, the first driving device 5 is used for driving the cutter structure 1 to rotate, the fixed cutter structure 2 is mounted on the body 9, and the cutter structure 1 and the fixed cutter structure 2 are matched with each other to crush materials. Alternatively, as shown in fig. 4, the fixed blade structure 2 is provided with a protrusion 21 and a groove 22, the protrusion 21 is used for cooperating with the second blade 12 to crush the material, and the groove 22 is used for cooperating with the first blade 11 to crush the material. Specifically, the convex parts and the grooves in the fixed cutter structure are alternately arranged. It should be understood that the crushing device may be a crusher, a pulverizer, or other similar structure.

Partial long materials may cross the convex parts 21 at the left and right of the groove 22, when the first knife element 11 rotates to enter the groove 22, the first knife element 11 and the convex parts 21 near the groove 22 are matched to shear the materials to a certain extent, and the crushing and shredding effects of the crushing device are enhanced.

In some embodiments, the device further comprises a pressing arm 3 and a second driving device, as shown in fig. 3, the second driving device is used for controlling the pressing arm 3 to reciprocate (e.g. raise and lower the pressing arm 3) to push the material in the body 9 between the cutter structure 1 and the fixed cutter structure 2. The material in the body 9 can be continuously pushed to a position between the cutter structure 1 and the fixed cutter structure 2 by arranging the material pressing arm 3.

In some embodiments, the first drive means 5 is a drive motor; the second driving device is a hydraulic cylinder. It should be understood that the first driving device 5 and the second driving device may have other driving structures in other embodiments, such as a motor, a cylinder, etc., and the present application is not limited in particular. And in some embodiments, a plurality of first drive means 5 and a plurality of second drive means may be included to drive the tool structure 1 and the swage arm 3, respectively. Also for obtaining a higher torque, in some embodiments the first drive means 5 may be in driving connection with the tool structure 1 via a reduction gearbox 51. Optionally, power is transmitted between the first driving device 5 and the reduction box 51 through a belt, and specifically, a brake pulley is disposed on an output shaft of the first driving device 5.

In some embodiments, the body is further provided with a maintenance door, and a user may access the interior of the body for maintenance by opening the maintenance door. It will be appreciated that the maintenance door is normally closed and a user cannot enter the body through the maintenance door.

In some embodiments, the body is further provided with a screen frame and a screen frame bracket 6, and the screen frame is placed below the cutter structure 1 and the fixed cutter structure 2 for filtering the crushed material. It should be understood that the size and shape of the screen holes of the screen frame may be designed according to circumstances. And the reel bracket 6 is installed on the body, can rotate and install on the body, and the reel bracket 6 can be lifted up or put down according to the circumstances. Under normal conditions, reel bracket 6 is for lifting up the state, and the reel is located the body, and when needing to be changed and wash the reel, can put down reel bracket 6, takes out the reel and changes or wash.

In some embodiments, the crushing device further comprises a discharge gate 7 for discharging material, in particular non-crushable objects, in the body.

When the uncrushable thing, uncrushable thing can block between cutter structure 1 and stationary knife structure 2, can cause first drive arrangement 5's electric current to be higher than the maximum value that the procedure set for, and the procedure will be carried out and is opened slag door 7, and the action of all materials in the discharge cavity is rotated in the reversal of first drive arrangement 5.

In addition, in some embodiments, if an uncrushable object occurs, the brake pulley may slip, the rotation speed of the cutter structure may be reduced, and when the rotation speed is lower than the minimum value set by the program, the program will perform the actions of opening the slag discharge door 7, reversing the first driving device 5, and discharging all the materials in the cavity.

In some embodiments, when the crushing device is used for crushing, firstly, the material enters the treatment cavity in the body from the feed hopper 4, the cutter structure 1 and the fixed cutter structure 2 are arranged in the treatment cavity, the material is crushed by matching the cutter structure 1 and the fixed cutter structure 2, the material with a preset size is obtained, and specifically, the cutter structure 1 rotates under the driving of the first driving device 5, so that the material is matched with the fixed cutter structure 2 to crush the material. During crushing, the second drive means also drives the press arm 3 in motion to feed the material in the process chamber between the cutter structure 1 and the stationary cutter structure 2.

In some embodiments, the main body 16 of the cutter structure rotates under the driving of the first driving device during crushing, the second cutter 12 is matched with the groove of the fixed cutter structure 2 in the rotating process to crush the material, part of the material may not be completely crushed and is clamped above the fixed cutter structure 2 or between the fixed cutter structure 2 and the second cutter 12, and the rotating first cutter 11 is matched with the fixed cutter structure 2 to extrude the material, so that an effect similar to shearing and tearing is formed, and the cutter structure 1 and the fixed cutter structure 2 are favorably matched to crush the material.

The above examples are only for illustrating the technical solutions of the present disclosure, and not for limiting the same. Although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure. All other embodiments made by those skilled in the art without any inventive step are within the scope of the present disclosure.

Claims (17)

1. A cutter structure is characterized by comprising a main body, a first cutter and a second cutter, wherein the first cutter and the second cutter are arranged on the main body; and the first insert is located farther from the axial center of the main body in the radial direction than the second insert.

2. The tool structure according to claim 1, wherein the body is provided with a plurality of protruding rings, the plurality of protruding rings are spaced apart in an axial direction of the body, the first tool is disposed in the protruding rings, receiving grooves are formed between adjacent protruding rings, and the second tool is disposed in the receiving grooves.

3. The cutter structure according to claim 1, comprising a plurality of first and second inserts.

4. The cutter structure according to claim 3, wherein one or more first cutters at the same cross section of the body constitute a first cutter ring, and one or more second cutters at the same cross section of the body constitute a second cutter ring, the first cutter ring and the second cutter ring not overlapping in the axial direction.

5. The cutter structure according to claim 4, wherein the first cutter ring and the second cutter ring are alternately arranged in the axial direction.

6. The cutter structure according to claim 1 wherein the body has a first face thereon such that the first face cooperates with the first cutting element to form the recess; and/or

The main body is provided with a second knife face, so that the second knife face and the second knife piece are matched to form a groove.

7. The cutter structure according to claim 1, wherein the first cutter is provided with a first edge and a second edge, and the first cutter is detachably mounted on the main body, the first cutter comprises a first mounting state and a second mounting state on the main body and is switchable between the first mounting state and the second mounting state, when the first cutter is in the first mounting state, the first edge cooperates with the fixed cutter structure to crush the material, and the second edge is located closer to the axis of the main body than the first edge; when the first cutter is in a second installation state, the second cutter edge is matched with the fixed cutter structure to crush materials; the first blade is located closer to the axis of the body than the second blade; and/or the presence of a gas in the gas,

the second cutter piece is provided with a third cutter edge and a fourth cutter edge, the second cutter piece is detachably mounted on the main body, the second cutter piece comprises a third mounting state and a fourth mounting state on the main body and can be switched between the third mounting state and the fourth mounting state, when the second cutter piece is in the third mounting state, the third cutter edge and the fixed cutter structure are matched to crush materials, and the fourth cutter edge is positioned closer to the axis of the main body than the third cutter edge; when the second knife element is in the first installation state, the fourth knife edge is matched with the fixed knife structure to crush materials, and compared with the fourth knife edge, the third knife edge is positioned at a position closer to the axis of the main body.

8. The tool structure according to claim 7, wherein the main body is provided with a mounting seat, the mounting seat and the first tool element are sequentially arranged along the rotation direction of the main body and abut against each other, and the mounting seat and the second tool element are sequentially arranged along the rotation direction of the main body and abut against each other.

9. The cutter structure of claim 8 wherein the mounting block is removably attached to the first cutter and the mounting block is removably attached to the second cutter.

10. The cutter structure according to claim 9, wherein the first cutter is mounted to the mounting base by means of a bolt, and the first cutter has a 180 ° rotationally symmetrical structure, and the bolt hole is located in the center of the first cutter; and/or

The second knife piece is installed on the installation seat through a bolt, the second knife piece is of a 180-degree rotational symmetry structure, and the bolt hole is located in the center of the second knife piece.

11. The cutter structure according to any one of claims 1 to 10,

a first group of one or more groups of first inserts, the first group of inserts comprising a plurality of axially distributed first inserts, and

a second set of one or more sets including a plurality of axially distributed second inserts.

12. The cutter structure of claim 11 wherein the first cutters of the same first cutter set are in a V-shaped arrangement and the second cutters of the same second cutter set are in a V-shaped arrangement.

13. The cutter structure according to claim 11, wherein the first blade group and the second blade group are alternately arranged in a circumferential direction of the body.

14. A crushing apparatus comprising a body, a first drive means, a stationary knife structure and the knife structure of any one of claims 1-13, wherein the knife structure is rotatably mounted to the body, and the first drive means is adapted to drive the knife structure to rotate, the stationary knife structure being mounted to the body, the knife structure and the stationary knife structure cooperating to crush material.

15. The crushing device of claim 14, further comprising a swage arm and a second drive means for controlling the swage arm to reciprocate to push material in the body between the cutter structure and the fixed cutter structure.

16. A crushing device according to claim 14, characterized in that the stationary blade arrangement is provided with a projection for cooperation with the second blade for crushing material and a recess for cooperation with the first blade for crushing material.

17. A crushing device according to claim 16, wherein the projections alternate with the recesses in the stationary blade structure.

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