EP2345479A1 - Hammer mill, rotor of a hammer mill, impact bolts, and catching device and locking device - Google Patents

Abstract

The hammer mill has a lockable milling chamber (2) and a rotor (10) disposed in the milling chamber, where the rotor has a rotor shaft (11), multiple rotor disks (12,18) dividing the rotor into multiple sections (15,15'), and multiple hammer pins (20) for receiving hammers (23) or hammer packets. The hammer pins are not extended over all sections. Independent claims are also included for the following: (1) a collecting device for collecting hammers of a rotor of a hammer mill; and (2) a locking device for locking a rotor of a hammer mill.

Description

The present invention relates to a hammer mill, a hammer mill rotor, a racket bolt, and a catcher and a locking device.

Hammer mills are well known in the art.

DE 102 53 345 A1 shows, for example, a hammer mill, in which the maintenance is facilitated. In particular, the change of the hammers is simplified because they can be mounted directly in an assembly on the rotor. The hammers with their spacers are lined up in a doctrine. Subsequently, a hammer bolt is inserted through all lined hammers and spacers. The thus prefabricated assembly is then placed in the gauge to the rotor and the hammer pin is fixed in the rotor to the rotor discs.

The hammer mills of the prior art have the disadvantage that a replacement of a single damaged or worn hammer is associated with considerable effort. There are always a number of hammers, which are located in front of the hammer to be replaced, are removed.

It is an object of the invention to overcome the disadvantages of the prior art. In particular, a hammer mill to be provided, which allows a simple and rapid replacement of the hammers.

This object is achieved by the hammer mill, the rotor and the racket bolt according to the independent claims. Further embodiments emerge from the dependent claims.

A hammer mill according to the invention has a grinding chamber that can be closed when used as intended and a rotor arranged in the grinding chamber. This rotor comprises a rotor shaft and a plurality of rotor disks, which divide the rotor into several segments. The rotor disks can be arranged at uniform or variable distances from each other on the rotor shaft. The individual rotor disks can be fixed, for example, via a screw connection on the rotor shaft. The rotor has a number of rackets for picking up rackets or whole rackets. The individual racquet bolts do not extend over all segments.

The fact that the individual racket bolts do not extend over all segments, a simple replacement of the rackets or racquet packages is made possible. The racket bolt is significantly shorter and lighter and takes up fewer clubs compared to such a conventional design. The single racket bolt with its on the racket bolt arranged racket or rackets packages is easier to handle.

The individual racquet bolts can be releasably attached on both sides to opposite and a single segment limiting rotor discs. If a single racket bolt only extends over a single segment, the racket bolt can be made shorter and the replacement of a single racket or a single racket package is further simplified.

Openings of the rotor disks, which can receive the racket bolt, may have an inner diameter which is larger than an outer diameter of the racket bolt. The bat bolt must therefore be pulled out only partially from an opening of the rotor disk. A partially pulled out racket bolt can then be removed by tilting out of the segment. In this case, the opening in the rotor disk is so large that a tilting of the racket bolt is made possible, whereby the racket bolt can be guided past an adjacent rotor disk.

It has been found to be advantageous if the racket bolts of a segment are offset relative to the racket pins of an adjacent segment with respect to the circumference. Thus, a simpler release and withdrawal of the racket bolt is made possible.

Between each two adjacent rotor disks, one or more support rings may be arranged. Such a support ring, which also has openings through which the racket bolt is passed or is mainly used for additional support of the racket bolt. Especially at high speeds, the racket bolts are heavily loaded by the weight of the racket and by the rotation of the rotor. By using support rings, the racket bolts can be dimensioned correspondingly smaller.

The support rings can be connected by means of support bolts with the rotor disks. Such a connection of the support rings with the rotor discs results in additional stability of the rotor. The support bolts can be continuous over all rotor disks. By such over all rotor disks extending support bolts a simple construction is possible.

Each racket bolt can each accommodate at least one or more clubs between two adjacent support rings or between a support ring and an adjacent rotor ring. The number of clubs is determined by the desired Vermahlungsart, the speed, the mass of each club and by the rotor diameter.

Each racket bolt may be provided at a first end with a cap for securing the racket pin in an opening of a rotor disk. By using a cap which connects the racket bolt with the rotor disk, a simple and inexpensive construction of the attachment is possible. Such a cap may be a metallic component that is particularly easy to produce by milling and / or turning operations.

The cap can essentially have a cylindrical shape, the outer diameter of which corresponds essentially to the inner diameter of the openings of the rotor disks. As a result, the cap is snugly received or receivable in the respective opening of the rotor disk. In this way, a stable fixation of the racquet bolts on the rotor discs can be ensured. By using such caps, the assembly and disassembly of the racket bolts can be further simplified. The opening of the associated cylindrical receiving portion of the cap can specify an annular gap, which sets the tilt angle for the dismantling of the racket bolt. At one end, the cap preferably has a shoulder formed, for example, by a circumferential collar, which serves as a stop in the opening of the rotor disk. At the opposite end of the cap, this may have a bore to receive the racket bolt therein. The bore may, for example, have an internal thread into which the racquet bolt, which has a corresponding external thread at one end, is screwed. It is also conceivable that the cap is attached to the bat bolt with a separate screw. Alternative forms of attachment are also conceivable. In addition, the cap can be formed integrally with the racket bolt.

For example, to secure the cap in the rotor disk, the cap may have a groove. This groove can receive a snap ring, so that the cap can be securely fastened between the shoulder and snap ring in an opening of the rotor disk. Alternative forms for securing the cap in the rotor disk are conceivable.

For positioning of the rackets during their assembly and also during operation of the hammer mill so-called rakes can be used, which are mounted between the rotor discs. Such a rake has on the racket bolt side facing slots in which the rackets are performed. In this case, the rake is mounted so close to the racket bolt or the opening of the rotor disk for receiving the racket bolt that the rackets are always in engagement with the slots. Thus, the clubs are indeed rotatable, but stored stationary on the racket bolt. The rake can be mounted as a single component directly between two or two adjacent rotor discs. Alternatively, it is also conceivable that the rake together with the rackets and a racket bolt forms a racquet package which is fixed between the rotor discs.

It has been shown that for a simple club change advantageous catching device is used, which collects the dissolved clubs when pulling out a racket bolt. Thus it can be prevented that the loose clubs fall into the grinding chamber, from where they can be removed only with considerable effort. Such a catcher according to the invention for catching bats of a rotor of a hammer mill, which can not only be used in a previously mentioned hammer mill, has a trough-shaped collecting space and fastening elements. The trough-shaped collecting space serves to accommodate loose clubs during their assembly and / or disassembly. The fasteners allow attachment of the catcher to a rake between two rotor discs. The fasteners may be hook-shaped. However, it is also conceivable that the fastening elements are designed as terminals, which can be clamped directly onto the rotor disks. Alternative fasteners are conceivable. The collecting device may for example consist of a sheet metal bent part. For ease of use handles can be arranged on the catcher.

It has been found that in hammer mills, which have a high quality and in which the rotor is rotatable without resistance, even the removal of a single racket leads to a rotation of the rotor. This requires that a club change must always be carried out by at least two people, with the first person holds the rotor and the second person performs the actual racket exchange. Now, if the rotor of a hammer mill is blocked with a locking device, the second person is unnecessary in the following. A corresponding locking device according to the invention, which can be used not only but also in a previously mentioned hammer mill, has a retaining means with which the locking device in a hammer mill, for example in the grinding chamber of the hammer mill, is fixedly attachable. Moreover the locking device on an engaging means which can be brought from a rest position to a locking position to block the movement of the rotor in the locking position. Such a locking device has as a retaining means, for example, a hook, with which the locking device can be hung in the grinding chamber, for example on a closing rail. By way of example, a clamping plate can be displaced by means of a toggle lever so that the clamping plate presses against a peripheral surface of a rotor disk and thus blocks the rotor. Other embodiments are also conceivable.

An alternative embodiment of a hammer mill, which alone or in combination with the aforementioned embodiment is advantageous, comprises a grinding chamber with a arranged in the grinding chamber and rotating about a rotor axis or rotatable rotor, and at least one closing the grinding chamber door. The door is mounted displaceably by means of rollers on a roller track arranged parallel to the rotor axis. The rollers are mounted on mounted on the door roller axles, which are perpendicular to the roller conveyors. The rollers can be mounted axially displaceable on these roller axes between an open position and a closed position. Such roles on the roller axes slidably mounted allow a simple and space-saving release of the door of the hammer mill, so that it can then be pushed to the side. This design provides high stability without much effort, without a complicated turning or folding mechanism is needed.

The rollers can be biased by a pressure medium on the roller axes in the open position. A move from the closed position is thus facilitated. As a pressure means, for example, a spring pack is conceivable.

The door may have additional closing means, which allow a displacement of the rollers against the force exerted by the pressure medium in the closed position. Such closing means are for example simple tension levers. Other closing means are also conceivable.

A rotor according to the invention may have the same features and advantages as previously described with reference to the hammer mill. In particular, he may have rackets, which do not extend over all segments.

An inventive racket bolt for a rotor of a hammer mill has a substantially cylindrical shape. At least at one end of the racket bolt has a means which allows either directly or via an additional element attachment of the racket bolt in an opening of a rotor disk of a rotor. The outer diameter of the racket bolt is dimensioned larger than an inner diameter of the opening in which it is to be attached. Such a racket bolt has the same advantages as previously described for the hammer mill and the rotor.

Figur 1:

eine perspektivische Ansicht einer erfindungsgemässen Hammermühle,

Figur 2:

eine perspektivische Ansicht eines erfindungsgemässen Rotors,

Figur 3:

einen erfindungsgemässen Schlägerbolzen,

Figur 4:

einen Ausschnitt einer Draufsicht auf einen Rotor,

Figur 5:

eine perspektivische Ansicht einer anderen Ausführungsform eines erfindungsgemässen Rotors,

Figur 6:

ein Schlägerpaket für den Rotor gemäss Figur 5,

Figur 7:

eine perspektivische Ansicht einer Feststelleinrichtung,

Figur 8a:

eine schematische Seitenansicht auf eine lose Feststelleinrichtung in einem Mahlraum einer Hammermühle,

Figur 8b:

eine schematische Seitenansicht auf die Feststelleinrichtung gemäss Figur 8a, wobei die Feststelleinrichtung gespannt ist,

Figur 9:

eine perspektivische Ansicht einer Auffangeinrichtung,

Figur 10:

eine schematische Seitenansicht auf einen Rotor mit eingehängter Auffangeinrichtung,

Figur 11:

eine perspektivische Ansicht der Hammermühle gemäss Figur 1 aus einer anderen Richtung,

Figur 12:

einen Schnitt entlang einer Rollenachse einer Türe einer Hammermühle in der Schliessstellung, und

Figur 13:

den Schnitt gemäss Figur 8, wobei sich die Rolle in der Öffnungsstellung relativ zur Tür befindet.

On the basis of figures, which represent only embodiments, the invention will be explained in more detail below. Show it:

FIG. 1:

a perspective view of an inventive hammer mill,

FIG. 2:

a perspective view of a rotor according to the invention,

FIG. 3:

a racket bolt according to the invention,

FIG. 4:

a detail of a plan view of a rotor,

FIG. 5:

a perspective view of another embodiment of a rotor according to the invention,

FIG. 6:

a racquet package for the rotor according to FIG. 5 .

FIG. 7:

a perspective view of a locking device,

FIG. 8a:

a schematic side view of a loose locking device in a grinding chamber of a hammer mill,

FIG. 8b:

a schematic side view of the locking device according to FIG. 8a in which the locking device is tensioned,

FIG. 9:

a perspective view of a collecting device,

FIG. 10:

a schematic side view of a rotor with hinged catcher,

FIG. 11:

a perspective view of the hammer mill according to FIG. 1 from another direction,

FIG. 12:

a section along a roller axis of a door of a hammer mill in the closed position, and

FIG. 13:

the cut according to FIG. 8 , wherein the roller is in the open position relative to the door.

FIG. 1 shows a generally designated 1 hammer mill. The hammer mill 1 has a (not shown here) equipped with beaters rotor. The rotor is located in a grinding chamber which is surrounded by a housing 9. The housing 9 is designed such that in the operating phase undesired escape of the ground material is prevented to the outside. On the viewer facing side of the hammer mill 1 is the drive for the rotor.

For example, for maintenance work are provided with 3 designated doors that can be moved to open in the f-direction. For this purpose, the door 3 has upper and lower rollers 4 and 4 'which can be unrolled on roller conveyors 5 arranged parallel to the rotor axis during the sliding movement. The lower roller 4 associated roller conveyor 5 is obviously an integral part of the machine table on which the hammer mill is installed. For the upper rollers 4 'two parallel to the rotor axis R extending guide rods 27 are provided which specify respective roller conveyors. Furthermore, in FIG. 1 Closing means 8 for securing the door 3 in a closed position recognizable.

FIG. 11 shows a further illustration of the hammer mill 1. From this figure is approximately recognizable that the hammer mill 1 has two opposing doors 3 and 3 '.

FIG. 2 shows a first variant of a rotor 10 for the hammer mill. The rotor 10 has a coaxial with the rotor axis R arranged rotor shaft 11. The rotor has two end faces defining rotor disks, of which the (visible) first designated 18. The grinding chamber located between these rotor disks is indicated by 2. Between the front rotor discs, two rotor discs are arranged, whereby the rotor is divided into three segments. In the figure, only the first segment 15 and hinted at the second segment 15 'can be seen. Of course, depending on the application, the rotor could also have three, four or more segments. It would also be conceivable, however, the arrangement of a single central rotor disk for specifying two segments.

Each segment has circumferentially distributed racket pins. The racket pins associated with the first segment 15 are designated 20. The individual racquet bolts 20 do not extend over all segments, but they are assigned only to the individual segments. For example, the first racket bolt 20 extends from the pulley 18 only to the immediately adjacent rotor disk 12. The racket pins 20 (as well as the rackets 23 mounted thereon) are disposed slightly offset relative to the racket pins of the adjacent segments with respect to the circumference on the rotor , The individual racquet bolts 20 are fastened on both sides to rotor disks 12, 181 which are located opposite each other and each have a single segment 15, 15 '. On the racket bolt are each a plurality of rackets 23. These rackets 23 have circular recesses over which the rackets are rotatably mounted on the respective racket bolt, whereby an advantageous impact or hammer movement is made possible in operation.

So that the rackets 23 remain in their position on the racket bolt 20 during operation and maintain their uniform distribution between the rotor disks 19 and the support rings 16, the rackets 23 are guided in so-called rakes 33. These rakes 33 are connected directly to the rotor disks and the support rings 16 in the embodiment shown. The rakes 33 have slots in which the beaters 23 are able to move with respect to rotation about the beater pins 20, but are fixed with respect to lateral displacement.

The individual components of the rotor 10 are preferably made of metallic materials, preferably of steel. For a better understanding of the rotor structure individual clubs are not shown per racket bolt. Of course, however, it is at least for a normal grinding operation advantageous if the rotor is completely equipped with rackets (in the present embodiment: 11 or 12 rackets per racket bolt; FIG. 4 ). The present rotor 1 has, by way of example, three segments with 24 racket bolts and - when fully assembled - 284 or 288 rackets.

Each segment 15, 15 'are each assigned two support rings 16. The support rings 16 have a reduced outer diameter in the region of the racket bolts of the adjacent segments, so that the racket bolt of an adjacent segment is not hindered by the support rings 16 when being pulled out. A stable and robust construction is achieved by the support rings 16 are connected by means of support bolts 17 with the rotor disks 18, 12. In contrast to the racket bolts, the support bolts 17 extend over the entire length of the rotor and thus include all segments 15, 15 '.

In FIG. 3 a single racket bolt 20 is shown. The racket pin 20 consists of a cylindrical shaft with an outer diameter D _{a •} At one end of the racket pin 20, a cap 24 is arranged frontally. The cap 24 has a the outer diameter D _{a of} the racket pin 20 corresponding hole. In the present embodiment according to FIG. 3 the cap 24 is fixed to the racquet bolt 20 via a fastening screw 29. For a secure attachment of the cap 24 on the racquet bolt 20, for example, another screw or other types of attachment could be selected. For example, the racket pin 20 could have a corresponding external thread on the face side and the bore 26 could have a corresponding internal thread. The cap 24 has a cylindrical portion with an outer diameter d _i , which corresponds to the opening 13 in the rotor disk 12.

The cap 24 is supported on one side by a shoulder 25 predetermining circumferential collar. To secure the mounted firing pin 20, a groove 30 is arranged in the cap, in which a (in FIG. 3 in a plan view shown and designated 28) retaining ring, in particular a snap ring, can be used. The difference between the two diameters d _i and D _a results in the extraction of the racket pin 20 from the opening 13 an annular gap, which allows tilting for easy removal. The advantages of this particular racquet pin design are as follows FIG. 4 seen.

The segment-like structure of the rotor is according to the plan view FIG. 4 again clearly visible. Evidently, the respective club pins 20, 20 'and 20 "are each assigned to only one segment FIG. 4 It can be seen, for example, that the first racket bolt 20 extends only from the rotor disk 18 to the next rotor disk 12. Evidently, each racket bolt 20, 20 'and 20 "each takes between two adjacent support rings 16 and between a Support ring 16 and an adjacent rotor ring 12, 12 ', 18 or 19) a plurality of clubs 23.

To disassemble, for example, to replace the rackets, the racket pin 20 must be pulled out of the opening 13 in the rotor disk 12. However, because of the adjacent rotor disk 12 ', the racket bolt 20 can not be pulled out completely in the axial direction. Since due to the larger diameter of the opening 13 in comparison to the outer diameter of the club pin 20 tilting is possible, after the tilting of the racket bolt can still be easily removed from the rotor. Such a tipped clubstick is shown in dashed lines and designated 20 ^* . The support rings 16 have a reduced outside diameter in the area of the racket bolts 20, 20 'and 20 "of the adjacent segments, so that the racket bolt of an adjacent segment is not obstructed by the support rings 16 when pulled out 19 are arranged at uniform intervals from each other on the rotor shaft 11 and connected via flange-like holding body 32 each fixed to the rotor shaft 11.

FIG. 5 relates to a second variant of a rotor 10 according to the invention, which is also characterized by a segment-like structure. This rotor 10 differs from the previous embodiment substantially in that no single racket 23, but whole racket packs 32 are received between adjacent rotor disks.

Such a racquet package 32 is in FIG. 6 shown. Evidently, the racquet package 32 approximately triangular support body 31, which serve to stabilize. In addition to the rackets 23 and the support members 31 have the rackets packages 32 also a rake 33 on. This rake 33 serves as previously described the lateral guidance and positioning of the rackets. In FIG. 6 In addition to a racquet package 32 a dismantled racquet bolt 20 can be seen. This racket bolt 20 forms a unit together with the cap 24. Finally is off FIG. 6 further recognizable that each racket 23 two circular recesses are provided. The second recess makes it possible that in case of signs of wear, the racket can be mounted in the reverse position on the racket package and so on.

In FIG. 7 a perspective view of a locking device 40 is shown. The locking device 40 essentially has a base frame 46, a lever 48 and an engagement means 44. On the base frame, a retaining means 41 in the form of a hook 42 and a paragraph 43 is arranged. By means of the hook 42, the locking device 40 can be hung in the grinding chamber of a hammer mill on a suitably designed backdrop. By operating the lever 48, the engagement means 44 can be moved over the knee lever 49, which leads to a clamping of a rotor disk and thus fixation of the rotor with a suitable arrangement in the grinding chamber.

The FIGS. 8a and 8b show the function of the locking device 40 according to FIG. 7 with respect to a rotor disk 12 in a schematic side view. It shows the FIG. 8a the locking device 40 in a rest position while FIG. 8b the locking device 40 in a locking position shows. The locking device 40 is hooked with its hook 42 on a wear rail 50 of the grinding chamber of the hammer mill. The paragraph 43 serves to protect against accidental release. By means of the lever 48, the toggle lever 49 can be moved, which in turn results in a displacement of the engagement means 44 leads. The engagement means 44 can thus from a rest position (see. FIG. 8a ) in a locking position (see. FIG. 8b ), where a clamping plate 45 arranged on the engagement means 44 is pressed onto an edge of a rotor disk 12. The clamping plate 45 is made of a hard rubber, so that during the clamping the rotor disk 12 is not damaged but still an optimal fixation of the rotor disk 12 is ensured. Other materials of the clamping plate 45 are conceivable.

FIG. 9 shows in a perspective view of an embodiment of a collecting device according to the invention 35. The collecting device 35 has substantially a trough-shaped collecting space 36, which is provided with two handles 38 and three hook-shaped fastening elements 37. The collecting space 36 and the fastening elements 37 of the collecting device 35 are integrally formed as a sheet metal bent part. Another embodiment is also conceivable.

In FIG. 10 is a schematic side view of a collecting device 35 and a rotor 10 is shown. The rotor 10 is simplified and only the essential elements are shown. The rotor 10 has a rotor shaft 11. On the shaft, a rotor disk 12 is fixed. Also, a support ring 16 is shown. On the rotor disk 12 10 evenly distributed rake 33 are arranged on the circumference of the rotor. Such a rake 33 is shown with a racket 23 on a racket bolt 20. The collecting device 35 is fastened with its fastening elements on the rake 33. In this case, the collecting device 35 is arranged so that the racket 23 is located directly above the collecting space of the collecting device 35. Clearly visible is the handle 38, which allows easy positioning of the catcher 35.

The FIGS. 12 and 13 each show a detailed representation with upper rollers 4 'in different positions. In FIG. 12 the door 3 is in a closed position. As can be seen, here a compression means 7 designed as a helical compression spring or a spring assembly is compressed, which results in a prestress. The rollers 4 'are biased on the roller axes 6 by the pressure means 7 in the open position. Moving out of the closed position is thus facilitated.

FIG. 13 relates to a hammer mill with a door 3 in the open position (relaxed position). The in the FIGS. 1 and 7 recognizable, arranged on the door 3 closing means in the form of clamping levers 8 allow a displacement of the rollers against the force exerted by the pressure means 7 force in the closed position.

Claims (17)

Hammer mill (1) with a closable under normal use grinding chamber (2) and a grinding chamber (2) arranged rotor (10) having a rotor shaft (11), a plurality of rotor discs (12, 12 ', 18, 19), which the rotor (10) into a plurality of segments (15, 15 ', 15 "), and a plurality of rackets (20, 20', 20") for receiving bats (23) or racket packs (32), characterized in that the rackets ( 20, 20 ', 20 ") in each case do not extend over all segments. Hammer mill (1) according to claim 1, characterized in that the individual racket pins (20, 20 ', 20 ") on both sides on opposite and a single segment (15, 15', 15 '') limiting rotor discs (12, 12 ', 18, 19) are releasably attached. Hammer mill (1) according to claim 1 or 2, characterized in that openings (13) of the rotor discs (12, 12 ', 18, 19) for receiving the racket pins (20, 20', 20 ") have an inner diameter (d _i ) , which is larger than an outer diameter (D _a ) of a club pin (20). Hammer mill (1) according to one of claims 1 to 3, characterized in that the racket pins (20, 20 ', 20 ") of a segment (15, 15', 15") to the racket pins (20, 20 ', 20'' ) of an adjacent segment (15, 15 ', 15'') are arranged offset. Hammer mill (1) according to one of claims 1 to 4, characterized in that between each two adjacent rotor disks (12, 12 ', 18, 19) one or more support rings (16) are arranged. Hammer mill (1) according to claim 5, characterized in that the support rings (16) by means of support bolts (17) with the rotor discs (12, 12 ', 18, 19) are connected. Hammer mill (1) according to claim 6, characterized in that the support bolts (17) are continuous over all the rotor disks (12, 12 ', 18, 19). Hammer mill (1) according to one of claims 5 to 7, characterized in that each racket bolt (20, 20 ', 20'') between each two adjacent support rings (16) or between a support ring (16) and an adjacent rotor ring (12, 12 ', 18, 19) receives at least one or more clubs (23). Hammer mill (1) according to one of claims 1 to 8, characterized in that each club pin (20) at a first end with a cap (24) for fixing the racket bolt in an opening (13) of a rotor disc (12, 12 ') provided is. Hammer mill (1) according to claim 9, characterized in that the cap (24) has a substantially cylindrical shape, which via a shoulder (25) for support to a rotor disk (12, 12 ') and a bore (26) for receiving of the club pin (20). Hammer mill (1), in particular according to one of the preceding claims, having a grinding chamber (2), a rotor (10) arranged in the grinding chamber (2) and rotatable about a rotor axis (R) and at least one door (3, 3 ') closing off the grinding chamber (2), the door (3, 3') being displaceably mounted by means of rollers (4, 4 ') on a roller conveyor (5) arranged in particular parallel to the rotor axis (R) is, wherein the rollers (4, 4 ') mounted on the door (3, 3') mounted roller axes (6, 6 ') which are perpendicular to the roller conveyors (5), characterized in that the rollers (4 , 4 ') are mounted axially displaceably on these roller axes (6) between an open position and a closed position. Hammer mill (1) according to claim 11, characterized in that the rollers (4, 4 ') on the roller axes (6) are biased by a pressure means (7) in the open position. Hammer mill (1) according to claim 12, characterized in that the door (3) closing means (8), which enable a displacement of the rollers (4, 4 ') against the force exerted by the pressure means (7) force in the closed position. Rotor (10) for a hammer mill (1), which has a rotor shaft (11), a plurality of rotor disks (12, 12 ', 13, 15) which divide the rotor (10) into a plurality of segments (15, 15', 15 ") , and a plurality of racket pins (20, 20 ', 20 ") for holding rackets (23), wherein the rotor discs (12, 12', 18, 19) have openings for receiving the racket pins (20, 20 ', 20'') characterized in that the racket pins (20, 20 ', 20 ") each do not extend over all the segments (15, 15', 15 ''). A racket pin (20) for a rotor (10) of a hammer mill (1), said racket pin (20) having a substantially cylindrical shape and at least one end portion a means which directly or via an additional element (24) allows attachment of the racket bolt (20) in an opening (13) of a rotor disk (12) of the rotor, wherein the inner diameter (d _i ) of the opening (13) is greater than the outer diameter (D _a ) of the racket pin (20). Collecting device (35) for collecting beaters (23) of a rotor (10) of a hammer mill (1), in particular a hammer mill (1) according to one of claims 1 to 13, with a trough-shaped collecting space (36), wherein the collecting device (35) Fastening elements (37), for securing the collecting device (35) between two rotor discs (19). Locking device (40) for locking a rotor (10) of a hammer mill (1), in particular a hammer mill (1) according to one of claims 1 to 13, wherein the locking device (40) comprises a retaining means (41), with which the locking device (40 ) in the hammer mill (1) is fixedly attachable and the locking device (40) has an engagement means (44) which from a rest position (46) in a locking position (47) can be brought to the locking position (47), the movement of the rotor (10) to block.

Images