Screening device

Abstract

The invention relates to a sieve device with a sieve box (10) in or on which at least one sieve lining (14, 15) is arranged in a sieving area between two mutually spaced sieve side walls (11), wherein the sieve box (10) can be set into oscillating motion by means of a vibration drive (20), wherein the vibration drive (20) has two excitation units (21), wherein the excitation units (21) are mechanically coupled to one another by means of a synchronization device (26), wherein a sheathing tube (22) extends in the area between the two sieve side walls (11), within which the synchronization device (26) is at least partially received, wherein at least one of the excitation units (21) has a motor unit (30) with a motor housing (34), and with its motor housing (34) in an opening (11.1) or in the area of ​​an opening (11.1) of one of the sieve side walls. (11) is mounted.This design is particularly easy to assemble if the casing tube (22) has a casing tube holder, in particular a flange (23, 24), in the area of ​​at least one screen side wall (11), which is arranged in the area of ​​the inside of the screen side wall (11) and which has at least one fitting recess (23.1), wherein a fastening element (25) with a locking section (25.3) is pressed into the fitting recess (23.1) in a rotationally fixed and axially non-displaceable manner, and a bolt (25.2) of the fastening element (25) is passed through openings in the screen side wall (11) and a fastening flange (34.1) of the motor housing (34) in order to connect the motor housing (34) to the screen side wall (11).

Description

[0001] The invention relates to a sieve device with a sieve box in which at least one sieve lining is arranged in a sieving area between two mutually spaced sieve side walls, wherein the sieve box can be set into oscillating movements by means of a vibration drive, wherein the vibration drive has two excitation units, wherein the excitation units are mechanically coupled to each other by means of a synchronization device, wherein a sheathing tube extends in the area between the two sieve side walls, within which the synchronization device is at least partially received, and wherein at least one of the excitation units has a motor unit with a motor housing, and is mounted with its motor housing in an opening or in the area of ​​an opening in one of the sieve side walls.

[0002] Such screening devices are used for classifying mineral material. They can be used in particular as pre-screening or post-screening devices, preferably in material processing equipment for processing, especially for comminution, mineral materials. Accordingly, the screening device can be arranged upstream or downstream of the comminution device in the direction of the material flow of the material processing equipment.

[0003] Prior art describes screening devices that have two excitation units in the form of unbalance drives ("flange vibration motors") flanged to the sides of the screen box. To synchronize the unbalance of the left and right sides, the excitation units are connected to each other via a shaft in a rotationally fixed manner. The shaft is enclosed in a protective sleeve to prevent contamination and accidental contact. For assembly, one unbalance drive must first be installed on one side. Then, the unbalance drive is attached to the opposite side. The unbalance drives are installed by two people simultaneously, from the inside and outside of the screen side wall.

[0004] The object of the invention is to provide a sieve device of the type mentioned above, which enables easy assembly and maintenance of the vibration drive.

[0005] This problem is solved by the fact that the casing tube has a casing tube holder, in particular a flange, in the area of ​​at least one screen side wall, which is arranged in the area of ​​the inside of the screen side wall and which has at least one fitting recess, wherein a fastening element with a locking section is pressed into the fitting recess in a rotationally fixed and axially non-displaceable manner, and wherein a bolt of the fastening element is passed through openings in the screen side wall and a mounting flange of the motor housing in order to connect the motor housing to the screen side wall.

[0006] For mounting the vibratory drive, the casing tube can be installed in the screen box. The mounting elements, which are part of the casing tube, are inserted through aligned openings in the screen side wall and the motor housing. This is easily done because the mounting elements are securely and captively attached to the casing tube holder. The casing tube is then held in a pre-assembly position between the screen side walls. The installer can now conveniently complete the assembly from the outside of the screen box by attaching suitable locking elements, such as nuts, to the mounting elements.

[0007] In case of maintenance, the exciter unit can also be easily replaced if the mounting element, viewed from the inside of the sieve box, is first inserted through an opening in the sieve side wall and then through an opening in the motor housing. This allows the motor housing to be removed, while the casing tube can remain installed in the sieve box and does not need to be removed as well.

[0008] Overall, the invention offers the user a design that is particularly easy to assemble and maintain.

[0009] According to one embodiment of the invention, the fastening element may have a head to which the locking section is attached, and the head rests against the side of the fastening piece, in particular the flange, facing away from the side wall of the sieve. This results in a positive-locking support of the fastening element in the axial direction of the fastening element. Thus, secure fastening of the motor housing and the casing tube can be achieved simultaneously.

[0010] A preferred embodiment of the invention provides that the bolt of the fastening element has a threaded section at its free end onto which a nut is screwed, clamping the motor housing to the screen side wall. This achieves a reliable fastening of the motor housing to the screen side wall, and assembly can be carried out easily on the outer surface of the screen side wall.

[0011] Simple assembly of the fastening element on the sheathing tube holder is achieved if the locking section has a surface structure with protrusions and indentations on its outer circumference, and if the protrusions are pressed into the inner circumference of the bore-shaped fitting recess in such a way that a positive locking connection is created between the locking section and the fitting recess in the circumferential direction of the locking section.

[0012] One possible embodiment of the invention is such that the motor housing accommodates an electric motor which drives a drive shaft, the drive shaft being extended from the motor housing at both ends on opposite sides, the drive shaft having receptacles at its ends to which an unbalanced weight is attached, and the motor housing being inserted into the opening in the sieve side wall. By inserting the motor housing into the opening, a load distribution is achieved that relieves the securing section of the fastening element in a stress-efficient manner. As a result, the connection between the securing section and the casing tube holder is subjected to little or no bending stress.It may be particularly preferred that a cutting plane perpendicular to the axis of rotation of the drive shaft intersects the locking section of the fastening element and the electric motor and / or that the drive shaft is supported by means of two bearings which are attached to bearing holders of the motor housing, and that in the direction of the axis of rotation of the drive shaft the locking section of the fastening element is arranged between the two bearings.

[0013] A sieve device according to the invention can be configured such that the casing tube has two tube sections which are telescopically extendable relative to each other in the direction of the axis of rotation of the drive shaft of the motor unit, and that each tube section has a flange at its end corresponding to the associated sieve side wall and is connected to the associated sieve side wall by means of fastening elements. The casing tube can thus first be collapsed for installation in the sieve box and then extended outwards in the installed position.

[0014] Assembly is particularly simple if, in a pre-assembled position of the casing tube, the distance along the tube's longitudinal axis from the free end of the fastener connected to the first flange to the free end of the fastener connected to the second flange is smaller than the clear distance between the screen sidewalls in this direction. Furthermore, in the final assembly position, this distance between the free ends of the fasteners is larger than the clear distance between the screen sidewalls, such that the free ends protrude beyond the outer surfaces of the screen sidewalls. In the pre-assembled position, the casing tube can thus be easily inserted into the screen box. In the final assembly position, the fasteners hold the casing tube securely in place against gravity, allowing it to be easily connected to the screen sidewall from the outside, for example, by screwing it in place.

[0015] One conceivable embodiment of the invention is such that the pipe sections are telescopically inserted into one another in such a way that the outer circumference of the first pipe section rests against the inner circumference of the second pipe section to form a sliding guide in the longitudinal direction of the casing pipe, and preferably that the pipe sections are rotatable relative to each other in the circumferential direction. This significantly simplifies assembly. Furthermore, the adjacent circumferential sections seal the interior of the casing pipe from the environment, at least in certain areas.

[0016] For optimal vibration behavior of the vibration drive, it can be provided that the excitation units are mechanically coupled to each other by means of a synchronization device, wherein the synchronization device has two transmission elements which are detachably coupled to each other in the area of ​​a coupling point by means of a coupling device and rotationally fixed to each other.

[0017] To further improve the assembly and maintenance of the vibration drive, an alignment aid with at least one alignment element may be provided. This element is designed and positioned to align the two transmission elements relative to each other at the coupling point during the joining process. Thus, the transmission element(s) can be aligned in an assembly position during the joining movement using the at least one alignment element, enabling the transmission elements to be joined, preferably without external access to the coupling point. This significantly simplifies assembly and reduces the number of parts required.

[0018] To compensate for any positional tolerances of the two excitation units, the coupling device may have a cardan shaft in which the transmission elements have pipe sections with a non-circular cross-section that are inserted into one another, each pipe section carrying a cardan joint, and the cardan joints being connected to a drive shaft by means of a coupling piece.

[0019] The invention will be explained in more detail below with reference to an embodiment illustrated in the drawings. The drawings show: Figure 1 shows a schematic side view of a sieve device in vertical section, Figure 2 shows a vibration drive of the sieve device according to Figure 1 , along the in Figure 1 Section marked II-II, Figure 3 shows a detail of the vibration drive along the in Figure 1 with section line marked III-III, Figure 4 a detailed view along the in Figure 2with section line marked IV-IV. Figure 5 shows a fastening element in perspective view, Figure 6 a synchronization device in side view, and Figure 7 the synchronization device along the section line. Figure 6 section line marked VII-VII.

[0020] Figure 1 Figure 1 shows a screening device typically used in material processing equipment, particularly in a rock crusher. The screening device has a screen box 10. This screen box 10 has two spaced-apart screen side walls 21, between which a screening area is formed.

[0021] The sieve box 20 is closed at the bottom by a base 12. At least one sieve layer 14, 15 is arranged within the sieve box 10 at a distance from the base 12. In the present embodiment, two sieve bases 14, 15 are installed.

[0022] A conveying area 13 is formed in the area above the upper screen layer 14. During operation, the screen box 10 is set into vibration by means of a vibratory drive 20. As a result of these vibrations, material placed on the upper screen layer 14 is conveyed along the conveying area 13. Figure 1 The material is conveyed from left to right. A first fraction is screened on screen 14 and transported away via this screen. The screened material falls onto the lower screen 15 and undergoes a further screening process. The screened material is again transported away via the lower screen 15, and the fine fractions that have passed through screen 15 are discharged via the bottom 12.

[0023] The vibration drive 20 is in Figure 2A more detailed illustration follows. As this illustration shows, the vibratory drive 20 has a modular design and comprises two excitation units 21. Each excitation unit 21 is mounted in the area of ​​a screen side wall 11. The two excitation units 21 are coupled to each other via a synchronization device 26.

[0024] With reference to Figure 3 First, the structure of the excitation units 21 will be explained in more detail. As this illustration shows, the excitation unit 21 can be designed to generate an imbalance by means of one or more unbalanced weights 40, which are arranged eccentrically to a drive shaft 31. This imbalance generates the vibrational movements in the sieve box 10.

[0025] The excitation unit 21 can include a motor unit 30, which comprises the drive shaft 31. The drive shaft 31 is driven by the motor rotor of an electric motor 32. The drive shaft 31 is rotatably mounted on opposite sides of the electric motor 32 by means of bearings 33. The electric motor 32 is housed in a motor casing 34. The bearings 33 may be mounted within the motor casing 34 itself. However, it is also conceivable, as this Figure 3 Figure 34 shows that separate bearing holders 35, 36 are attached to the motor housing 34, each holding one of the bearings 33. This allows for a modular design, in which the prefabricated bearing holders 35, 36 can be installed like a kit with different motor housings 34.

[0026] A mounting flange 34.1 can be provided for attaching the motor unit 30 to the sieve box 10, which can in particular be integrally connected to the motor housing 34.

[0027] The motor unit 30 can preferably be mounted in an opening 11.1 of the sieve side wall 11. In The motor housing 34 can be inserted into this opening 11.1. For mounting the motor unit 30, bores are machined into the screen side wall 11. These bores are aligned with bores 34.2 of the mounting flange 34.1. The motor unit 30 is attached to the screen side wall 11 by means of fastening elements 25, which are inserted through the aligned bores 34.2 in the screen side wall 11 and in the mounting flange 34.1, as will be explained in more detail later.

[0028] As the representation according Figure 3To further illustrate, the drive shaft 31 may have a receptacle 37, 38 at each of its two ends. An unbalanced weight 40 is fixed to each of these receptacles 37, 38 in a rotationally fixed manner. The unbalanced weight 40 has a single weight 41. This single weight 41 has a bore. The single weight 41 is pushed onto the receptacle 37, 38 of the drive shaft 31 by means of this bore.

[0029] How Figure 2 As shown, depending on the system configuration, an additional unbalanced mass may be required. For this purpose, it may be provided that, in addition to the individual weight 41, one or more additional weights 42 are directly or indirectly connected to the drive shaft 31 in a rotationally fixed manner, either at one or both ends of the drive shaft 31.

[0030] It can be like this: Figure 2This shows that the additional weight 42 is directly connected to the individual weight 41. For this purpose, the individual weight 41 may be provided with a bolt 43 onto which the additional weight 42 is slid via a bore. Thus, the additional weight 42 can be connected to the individual weight 41 by screwing a nut 44 onto the bolt 43, which securely clamps the additional weight 42 to the individual weight 41.

[0031] Preferably, the masses at both ends of the drive shaft 31 are chosen to be equal or at least approximately equal in order to achieve a uniform load on the drive shaft 31.

[0032] Evidentiously Figure 3The motor unit 30 may be equipped with a support device, preferably a lifting eye 39. The lifting eye 39 may be screwed into the outer end of the drive shaft 31 in the area of ​​the receptacle 37. The support device allows the motor unit 31 to be suspended from an auxiliary device and handled more easily for assembly purposes, thus simplifying the assembly process.

[0033] How Figure 2 As shown, the two excitation units 21 on either side of the sieve box 10 can be of a fundamentally similar design, so that reference can be made to the preceding explanations. Preferably, the excitation units 21 are identical or substantially identical in construction, thus reducing the parts and assembly effort.

[0034] On the outer side of the associated sieve side wall 11, the excitation units 21 are covered by a cover 50, which is preferably connected to the associated bearing holder 36. The cover 50 covers the rotating parts of the motor unit 30 on the outside, thus eliminating the risk of injury.

[0035] Figure 1 and Figure 3 The figures further illustrate that the part of the motor unit 30 projecting outwards beyond the side wall 11 of the sieve can be completely or at least mostly covered from above in the direction of gravity by a protective cover 70. This protective cover 70 protects the motor unit 30 from the mechanical impact of falling parts. The protective cover 70 can be manufactured as a stamped and bent part from a sheet of steel.

[0036] According to the Figures 2 and 3A casing tube 22 extends between the two sieve side walls 11. The casing tube 22 has two tube sections 22.1, 22.2 which are nested inside one another. The tube sections 22.1, 22.2 of the casing tube 22 each have a flange 23, 24 at their end facing the sieve side wall 11. The flanges 23, 24 are equipped with bore-shaped fittings 23.1 (see Figure 3 ).

[0037] To secure the sheathing tube 22 between the screen side walls 11, the two tube sections 22.1, 22.2 are pushed together until the tube ends abut the flanges 23, 24. The length of the sheathing tube 22 is then less than the clear distance between the screen side walls 11. The sheathing tube 22 can thus be easily inserted into the space between the screen side walls 11.

[0038] The fastening elements 25 mentioned above are used to attach the casing tube 22 to the sieve side walls 11. The fastening elements 25 are designed as dowel pins and are in Figure 5 shown more clearly.

[0039] How Figure 5 As shown, the fastening elements 25 have a head 25.1. A bolt 25.2 is integrally attached to this head 25.1. In the transition area between the head 25.1 and the bolt 25.2, a locking section 25.3 is formed on the bolt 25.2. This locking section 25.3 has a surface structure with raised and recessed areas. Opposite the head 25.1, the fastening element has a threaded section 25.4.

[0040] The fasteners 25 can be inserted, with their bolt 25 leading, through the receptacle 23.1 of the flange 23. In the assembled state, the locking section 25.3 comes to rest in the receptacle 23.1. The receptacle 23.1 is designed as a bore, the bore diameter of which is smaller than the outer diameter of the locking section 25.3. Thus, the locking section 25.3 can be pressed into the receptacle 23.1, with the aforementioned protrusions of the locking section 25.3 embedding themselves into the inner wall of the receptacle 23.1. In this way, the locking section 25.3 forms a positive-locking connection in the circumferential direction of the bolt 25.2 between the flange 23 and the fastener 25.

[0041] Figure 3The figure illustrates that the bolt 25.2 of the fastening element 25 is inserted through a bore in the screen side wall 11 and through the bore 34.2 of the mounting flange 34.1 of the motor housing 34. A nut 34.4 is screwed onto the threaded section 25.4 of the fastening element 25. Thus, the motor housing 34 and simultaneously the associated pipe section 22.1, 22.2 can be connected to the screen side wall 11 by means of the fastening element 25.

[0042] Assembly is remarkably simple. As mentioned above, the casing tube 22 simply needs to be placed between the two sieve side walls 11. The two tube sections 22.1 and 22.2 can be telescoped into each other until the clear distance between the sieve side walls 11 is greater than the distance between the free ends of the bolts 25.2 of the fastening elements 25, which are pre-assembled and secured in the two flanges 23 and 24 in the fitting 23.1. Once the bolts 25.2 are aligned with the holes in the sieve side walls 11, the tube sections 22.1 and 22.2 simply need to be moved outwards so that the threaded sections 25.4 are inserted through the sieve side walls 11. This holds the casing tube 22 in a pre-assembly position. For further assembly, no access from the inside of the sieve box 10 is required. The following assembly steps can be carried out from the outside of the sieve box 10.

[0043] In particular, the two motor units 30 can now be mounted to the sieve side walls 11 from the outside, and the nuts 34.4 can be tightened from the outside. Since the fastening element 25 with its locking section 25.3 is captive and rotationally fixed in the flange 23, 24, the fastening element 25 no longer needs to be held from the inside of the sieve box 10 when the nut 34.4 is tightened. When the nut 34.4 is tightened, the two pipe sections 22.1, 22.2 are extended further outwards, so that they can compensate for any positional tolerances of the sieve side walls 11.

[0044] It may be provided that sealing elements 34.3 are arranged between the flanges 23, 24 to prevent dust from entering the area surrounded by the casing tube 22. The sealing element 34.3 can, for example, be designed as a circumferential sealing ring arranged between the flange 23, 24 and the inside of the screen side wall 11.

[0045] The two excitation units 21 are mechanically coupled to each other by means of a synchronization device 26, as shown here. Figure 2 The synchronization device 26 serves to synchronize the rotary movements of the drive shafts 31 of the motor units 30.

[0046] How Figure 2 As shown, the centers of mass of the unbalanced weights 40 of the excitation units 21 are held in the circumferential direction at the same angular position or at least approximately at the same angular position by means of the synchronization device 26.

[0047] The synchronization device 26 can have a coupling device 60, as described in the Figures 6 and 7 The coupling device 60 may have coupling pieces 61, 65 at opposite ends, each of which is non-rotatably connected to one of the drive shafts 31 of the motor units 30, as shown. Figure 2 shows.

[0048] For this purpose, a holder 45 can be rotationally fixed to the drive shaft 31. The associated end of the coupling device 60 is connected to this holder 45 by means of screw connections 46.

[0049] Each coupling piece 61 is connected to a universal joint 62. The universal joint 62 carries a transmission element 64, and the universal joint 66 carries a transmission element 68. The two transmission elements 64 and 68 can be connected to each other, in particular in a rotationally fixed manner.

[0050] It is possible that the two transmission elements 64, 68 are or have pipe sections 64.1, 68.1. It is possible that the pipe sections 64.1, 68.1 have a non-circular cross-section and are pushed into one another in the area of ​​a coupling point, as shown. Figure 7 The cross-sections of the pipe sections 64.1, 68.1 in the joining area of ​​the coupling point are designed such that they form a positive-locking connection in the circumferential direction when joined.

[0051] Evidentiously Figure 7 It is possible that the cardan joints 62, 66 have fastening pieces 63, 67 which are fitted into the ends of the pipe sections 64.1, 68.1 facing away from the coupling point in order to form a rotationally fixed connection between the cardan joint 62, 66 and the pipe section 64.1, 68.1.

[0052] As the Figures 6 and 7As shown, an alignment aid is used which is designed and arranged to align at least one of the transmission elements 64, 68 in its mounting position during the joining movement in which the exciter unit 21 is mounted on the screen side wall 11. This aligned mounting position is such that the two transmission elements 64, 68 are joined together without requiring any operator intervention at the coupling point.

[0053] Preferably, the sheathing tube 22 is closed in the area of ​​the coupling point, which significantly simplifies its construction. Alternatively, it can also be provided that only an inspection opening is incorporated into the sheathing tube 22 in the area of ​​the coupling point in order to monitor the joining process and, if necessary, to correct it.

[0054] The alignment aid has at least one alignment element 62.1, 68.2, 69.

[0055] The individual alignment elements 62.1, 68.2, and 69 are explained in more detail below. How the Figures 6 and 7 As shown, the alignment element 62.1 can be designed and arranged to stabilize one of the cardan joints 62, 66 in the assembly position or at least approximately in the assembly position.

[0056] For this purpose, the alignment element 62.1 may be designed in the form of an elastic component that stiffens one of the cardan joints 62, 66 in such a way that the transmission element 64, 68 connected to the joint is held in a joining position raised relative to the direction of gravity.

[0057] As the illustrations show, the alignment element 62.1 may be formed by a plastic heat-shrink tube that surrounds the cardan joint 62, 66. The heat-shrink tube holds the transmission element 64 in its orientation raised relative to the direction of gravity, as shown by Figures 6 and 7results, or at least approximately in the position shown.

[0058] Additionally or alternatively, the alignment aid can also include an alignment element 68.2, as can be seen from Figure 6 This alignment element 68.2 can preferably be formed by a shaped body that is pushed onto the outer circumference of one of the transmission elements 64, 68. As evidenced by Figure 2 This alignment element 68.2 rests with its outer circumference against the inner contour of the casing 22. It can be supported against the inner wall of the casing 22 over its entire circumference or only over a portion of it. In this way, the connected transmission element 68 is aligned with the stationary casing 22 in its mounting position or approximately in its mounting position.

[0059] It is possible that the transmission element 68 also carries a limiting element 68.3. This can, as Figure 7The figure shows that it is connected in one piece to the transmission element 68. The limiting element 68.3 serves to limit the displacement movement of the alignment element 68.2, which is attached to the transmission element 68.

[0060] Additionally or alternatively, an alignment element 69 may be used, which is attached to one end of a transmission element 64, 68 by a fastening section 69.1. The mounting movement of the alignment element 69 on the transmission element 64, 68 is limited by a stop 69.3 of the alignment element 69.

[0061] For example, this stop 69.3 may abut the free end of the transmission element 68, on which the alignment element 69 is attached. The alignment element 69 has a centering receptacle 69.2, which is aligned and oriented towards the second transmission element 64. This centering receptacle 69.2 may be designed in the form of a funnel-shaped extension, as shown. Figure 7 shows.

[0062] To mount the exciter units 21, one of the exciter units 21 is first mounted on the associated sieve side wall 11 as described above. The transmission element 64, 68 connected to this exciter unit 21 is then inserted into the casing tube 22. If the alignment aid is such that the alignment element 62.1 is used, which stiffens the cardan joint 62, the transmission element 64 is already aligned in its approximate mounting position.

[0063] If the alignment element 68.2 is used, the connected transmission element 68 centers itself relative to the sheathing tube 22 in its approximate mounting position.

[0064] When the two excitation units 21 are moved towards each other, the free end of the transmission element 64 penetrates into the centering receptacle 69.2 of the alignment element 69 and is aligned so that the two transmission elements 64, 68 can be joined together, as shown. Figure 7 shows.

[0065] If the non-circular cross-sections of the transmission elements 64, 68 do not meet exactly, this can be corrected by slightly rotating one of the excitation units 21 until a perfect fit is achieved and the transmission elements 64, 68 can finally be inserted into one another. Finally, the excitation units 21 are clamped to the sieve side wall 11 with the fastening elements 25 as described above, and the assembly is complete.

Claims

1. A sieve device with a sieve box (10) in or on which at least one sieve lining (14, 15) is arranged in a sieving area between two mutually spaced sieve side walls (11), wherein the sieve box (10) can be set into oscillating motion by means of a vibration drive (20), wherein the vibration drive (20) has two excitation units (21), wherein the excitation units (21) are mechanically coupled to one another by means of a synchronization device (26), wherein a sheathing tube (22) extends in the area between the two sieve side walls (11), within which the synchronization device (26) is at least partially received, wherein at least one of the excitation units (21) has a motor unit (30) with a motor housing (34), and with its motor housing (34) in an opening (11.1) or in the area of ​​an opening (11.1) of one of the sieve side walls. (11) is mounted, characterized by thatthe casing tube (22) in the area of ​​at least one screen side wall (11) has a casing tube holder, in particular a flange (23, 24), which is arranged in the area of ​​the inside of the screen side wall (11) and which has at least one fitting recess (23.1), wherein a fastening element (25) with a locking section (25.3) is pressed into the fitting recess (23.1) in a rotationally fixed and axially non-displaceable manner, and that a bolt (25.2) of the fastening element (25) is passed through openings in the screen side wall (11) and a fastening flange (34.1) of the motor housing (34) in order to connect the motor housing (34) to the screen side wall (11).

2. Sieve device according to claim 1, characterized by the fact that the fastening element (25) has a head (25.1) to which the locking section (25.3) is attached, and that the head (25.1) rests on the side of the casing tube holder, in particular the flange (23, 24), facing away from the sieve side wall (11).

3. Sieve device according to one of claims 1 or 2, characterized by the fact that the bolt (25.2) has a threaded section (25.4) at its free end, onto which a nut (34.4) is screwed, clamping the motor housing (34) to the sieve side wall (11).

4. Sieve device according to one of claims 1 to 3, characterized by the fact that the locking section (25.3) has a surface structure with protrusions and depressions on its outer circumference, and the protrusions are pressed into the inner circumference of the bore-shaped fitting recess (23.1) in such a way that a positive locking connection is formed in the circumferential direction of the locking section (25.3) between the locking section (25.3) and the fitting recess (23.1).

5. Sieve device according to one of claims 1 to 4, characterized by the fact thatthe motor housing (34) accommodates an electric motor (32) which drives a drive shaft (31), the drive shaft (21) being led out of the motor housing (34) at both its ends on opposite sides, the drive shaft (31) having receptacles (37, 38) in the region of its ends to which an unbalance weight (40) is attached, and the motor housing (34) being inserted into the opening (11.1) of the sieve side wall (11).

6. Sieve device according to claim 5, characterized by the fact that a cutting plane perpendicular to the axis of rotation of the drive shaft (31) intersects the locking section (25.3) of the fastening element (25) and the electric motor (32).

7. Sieve device according to claim 5 or 6, characterized by the fact thatthe drive shaft (31) is supported by means of two bearings (33) which are attached to bearing holders (35, 36) of the motor housing (34), and that in the direction of the axis of rotation of the drive shaft (31) the locking section (25.3) of the fastening element (25) is arranged between the two bearings (33).

8. Sieve device according to one of claims 1 to 7, characterized by the fact that the casing tube (22) has two tube sections (22.1, 22.2) which are telescopically extendable relative to each other in the direction of the axis of rotation of the drive shaft (31) of the motor unit (30), and that the tube sections (22.1, 22.2) each have a flange (23, 24) at their end associated with the associated screen side wall (11) and are connected to the associated screen side wall (11) by means of fastening elements (25).

9. Sieve device according to claim 8, characterized by the fact thatIn a pre-assembly position of the casing tube (22), the distance in the direction of the longitudinal extent of the casing tube (22) from the free end of the fastening element (25) connected to the first flange (23) to the free end of the fastening element (25) connected to the second flange (24) is smaller than the clear distance between the screen side walls (11) in this direction, and that this distance of the free ends of the fastening elements in the assembly position is larger than the clear distance between the screen side walls (11), such that the free ends protrude beyond the outer surfaces of the screen side walls (11).

10. Sieve device according to claim 8 or 9, characterized by the fact thatthe pipe sections (22.1, 22.2) are telescopically inserted into one another in such a way that the outer circumference of the first pipe section (22.2) rests against the inner circumference of the second pipe section (22.1) to form a sliding guide in the direction of the longitudinal extension of the sheathing tube (22), and it is preferably provided that the pipe sections (22.1, 22.2) are rotatable relative to each other in the circumferential direction.

11. Sieve device according to any one of claims 1 to 10, characterized by the fact that the excitation units (21) are mechanically coupled to each other by means of a synchronization device (26), wherein the synchronization device (26) has two transmission elements (64, 68) which are detachably coupled to each other in the area of ​​a coupling point by means of a coupling device (60) and rotationally fixed to each other.

12. Sieve device according to claim 11, characterized by the fact thatAn alignment aid with at least one alignment element (62.1, 68.2, 69) is provided, which is arranged and designed to align the transmission elements (64, 68) against each other in the area of ​​the coupling point during the joining process of the two transmission elements (64, 68).

13. Sieve device according to claim 12, characterized by the fact that the coupling device (60) has a cardan shaft in which the transmission elements (64, 68) have pipe sections (64.1, 68.1) with a non-circular cross-section which are inserted into one another, each pipe section (64.1, 68.1) carries a cardan joint (62, 66), and the cardan joints (62, 66) are each connected to a drive shaft (31) by means of a coupling piece (61, 65).

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