MATERIAL PROCESSING UNIT AND METHOD FOR OPENING AND CLOSING A HOUSING PART OF A HOUSING OF A MATERIAL PROCESSING UNIT

Description

[0001] The invention relates to a material processing unit, in particular a crushing unit, with a housing in which at least one movable tool driven by a drive, in particular a percussion rotor, a crushing jaw or a crushing cone, is at least partially housed in a receiving space, in particular a crushing chamber, wherein the housing has a housing part which is adjustable relative to at least one further housing part between an open and a closed position, and which in the open position provides access to the receiving space, wherein a safety device is provided which prevents the housing part from being moved into the open position when the tool is driven, and / or prevents the tool from being driven by the drive in the open position of the housing part.

[0002] The invention also relates to a method for opening and closing a housing part of a housing of a material processing unit.

[0003] WO 2021 / 176136 discloses a rotary impact crusher assembly with a housing. A crushing chamber is formed within the housing, in which an impact rotor is rotatably mounted by means of a horizontal shaft. The impact rotor has impact elements on its outer circumference. The assembly has a maintenance hatch that can be opened to provide access to the crushing chamber. Furthermore, a retaining device is provided that prevents the maintenance hatch from being opened when the horizontal shaft is driven or could be set in motion by an imbalance. The retaining device comprises a first retaining element and a second retaining element. The first retaining element is pivotally mounted by means of hinges between a locked position and an access position, with the first retaining element preventing access to the crushing chamber through the maintenance hatch in the locked position.The second retaining element is also pivotally mounted and, in a control position, engages the horizontal shaft via an engagement element to prevent uncontrolled rotation. In an operating position, the second retaining element pivots away from the horizontal shaft, so the engagement element is disengaged. The pivot paths of the retaining elements are arranged such that, in the operating position, the second retaining element blocks the first retaining element from pivoting into the access position. Furthermore, when in the access position, the first retaining element blocks the second retaining element from pivoting into the operating position.

[0004] US 2006 / 027690 A1 describes a mill with a grinding mechanism and a sieve. A top cover protects the grinding mechanism. The sieve can be removed from the mill by opening the cover and lifting it out through the opening exposed by the cover.

[0005] US 8,505,843 B2 describes a comminution mill for inert material comprising a distribution unit, a comminution unit located below the distribution unit, and a box-shaped structure for housing the distribution unit and the comminution unit. The distribution unit receives the inert material from a feed device and conveys it appropriately to the comminution unit below for secondary and / or tertiary comminution of the inert material.The box-shaped structure has at least two lower lateral half-shells associated with the comminution unit and at least two upper lateral half-shells associated with the distribution unit, which are selectively movable independently or jointly to achieve an at least partially open configuration of the mill in which at least the distribution unit is fully exposed and easily accessible, and advantageously also the comminution unit.

[0006] The object of the invention is to provide a material processing unit with a safety device that enables a robust construction and function as well as safe and user-friendly opening and closing of the housing.

[0007] The object of the invention is also to provide a method for safely and user-friendly opening and closing of a housing part of a housing of a material processing unit.

[0008] The problem relating to the device is solved by a device according to claim 1.

[0009] The problem concerning the material processing unit is solved by the safety device comprising at least two actuator units and a control unit, wherein the first actuator unit locks the housing part in the closed position in a locking position and unlocks it in an unlocking position, wherein a second actuator unit effects and / or supports or at least permits an adjustment of the housing part, wherein the second actuator unit assumes a closing position in the closed position of the housing part and an opening position in the open position, wherein at least one sensor for detecting a position state is assigned to each of the at least two actuator units, and wherein the control unit is designed to control the drive and the actuator units and to receive position states detected by the sensors.

[0010] The first actuator unit securely holds the housing in a closed position. Furthermore, the locking and unlocking of the housing section can be conveniently accomplished using the first actuator unit. For example, a user does not need to manually engage the locking and / or unlocking function. In particular, the control unit can be used to actuate the first actuator unit accordingly. Preferably, a user can interact with the control unit, especially via a control panel or an external input / output device, to adjust the position of the first actuator unit. The control unit preferably includes software.

[0011] The second actuator unit also allows for safe and convenient opening and closing of the housing. This eliminates the need for manual operation. This can be particularly advantageous if the housing is split, for example, with the adjustable section pivoting relative to the other section. In such cases, the adjustable section can be quite heavy and have significant dimensions, which could pose a safety risk to the user if opened and / or closed manually. Alternatively, the adjustable section could be designed as a flap or door and / or be slidable relative to the other section. In these cases as well, the second actuator unit provides convenient operation.

[0012] As with the first actuator unit, the second actuator unit can also be adjusted by a user via the control device, for example via an operating panel or an external input / output device.

[0013] The sensors assigned to the actuator units can be, for example, displacement measuring systems or position measuring systems, in particular end position measuring systems.

[0014] It is of course conceivable that more than one first actuator unit and / or more than one second actuator unit are provided. Accordingly, it may be possible to provide redundant actuator units and / or to dimension actuator units accordingly smaller. Actuator units can also be mechanically advantageously positioned at several force application points on the housing, for example, with respect to a plane that is oriented perpendicular or transverse to a pivot axis of the housing part, on both sides of the housing.

[0015] The control unit can detect the positions of the actuator units as measured by the sensors. Furthermore, the control unit can control the drive. Accordingly, the control unit can be designed to permit, depending on the positions of the actuator units and the operating state of the drive, only positioning operations that do not pose an increased safety risk. Preferably, suitable software for the control unit can be used for this purpose.

[0016] Furthermore, the control device can also be configured to detect the tool's state of motion. For example, the tool may be in motion even when the drive is deactivated, particularly after the drive has been deactivated, due to its inertial mass, especially in the case of a percussion rotor or a crusher jaw, which may be coupled to a flywheel. Additionally, material being processed may be located in the vicinity of the tool even when the drive is deactivated and exert inertial forces on the tool, thus keeping it in motion and / or displacing it.

[0017] Thus, the control device can also take the tool's state of motion into account, in order to permit only safe positioning operations that do not pose an increased safety risk. Preferably, the control device's software is designed to permit only safe positioning operations.

[0018] According to the invention, the control device can be designed so that adjustment of the second actuator unit is only permitted when the first actuator unit is in the unlocked position. This prevents damage to the first actuator unit, the second actuator unit, and / or the housing.

[0019] According to a preferred embodiment of the invention, it is proposed that a tool positioning device is provided which engages with an element of a drive train of the tool, in particular with a rotor shaft or a drive disc, in an engagement position, wherein, by means of the tool positioning device in the engagement position, a driving of the tool caused by the drive and / or a movement of the tool caused by inertial forces is prevented.

[0020] This can provide a way to prevent unwanted movement of the tool. Unwanted tool movement can pose a significant risk of injury to users, for example, when maintenance work needs to be carried out inside the housing.

[0021] It may be provided, in particular, that a third actuator unit is included, wherein the third actuator unit can assume an engagement position and / or a release position, and that in the engagement position the third actuator unit blocks the tool positioning device in the engagement position and / or in the release position releases it. In this way, it can be ensured that the tool positioning device is in the engagement position, and thus the tool cannot move unintentionally. The position of the third actuator unit can also be determined by means of a sensor and transmitted to the control unit. Thus, the position of the third actuator unit can also be taken into account by the control unit. It can therefore be determined whether the tool is in a secure, preferably locked, position.

[0022] To ensure that the tool is not driven when access to the interior of the housing is provided, the invention may provide that the control device only allows the tool to be driven when the first actuator unit is in the locking position and the second actuator unit is in the closing position.

[0023] Preferably, the control device can further stipulate that the tool can only be driven if the third actuator unit is in the enable state. This prevents damage to the third actuator unit and / or the drive and / or a drive train between the drive and the tool.

[0024] One embodiment of the invention is such that the control device only permits the first actuator unit to be moved into the unlocked position and / or the second actuator unit to be moved into the open position when the third actuator unit is in the engaged position. This ensures that the housing can only be opened when the tool is secured against unintentional movement.

[0025] Furthermore, it can be preferably provided that the first actuator unit can only be moved into the locked position when the second actuator unit is in the closed position. This prevents damage to the first actuator unit. It also ensures that when the first actuator unit is in the locked position, it actually corresponds to a locked housing. This prevents the transmission of erroneous and / or ambiguous signals about the position of the first actuator unit to the control unit.

[0026] A variant of the invention can be characterized in that the control device permits the adjustment of the first actuator unit to the unlocked position and / or the adjustment of the second actuator unit to the open position and / or the adjustment of a third actuator unit to an engagement position only when the tool is not driven, preferably when the tool is not in motion. For example, the control device can determine whether the drive is deactivated and / or whether the tool is at rest. In this case, a state may exist that allows the housing to be opened safely, and thus permits the adjustment of the first actuator unit to the unlocked position and / or the second actuator unit to the open position and / or the adjustment of a third actuator unit to an engagement position.

[0027] According to a preferred embodiment of the invention, it is proposed that the first actuator unit has an actuating element and a locking element adjustable relative to the actuating element between the locking position and the unlocking position, and that the locking element and a locking counter-element form a force-fit and / or form-fit connection between the housing part and the further housing part in order to lock the housing parts together in the closed position in a locking position.

[0028] It is conceivable that the first actuator unit is located on the housing part and the locking counterpart on the other housing part. Conversely, it is also conceivable that the first actuator unit is located on the other housing part and the locking counterpart on the housing part.

[0029] The actuating element may preferably comprise a hydraulic cylinder, particularly preferably a double-acting hydraulic cylinder, or be designed as such. In this case, the hydraulic cylinder may preferably be secured by means of a lowering / braking holding valve. Preferably, the locking element may be coupled to a transmission element, in particular to a piston rod.

[0030] The sensor assigned to the first actuator unit can preferably be designed as a displacement measuring system. In this case, the displacement measuring system can determine, based on the existing adjustment path of the locking element and / or the transmission element relative to the actuating element, whether the first actuator unit is in the locked or the enabled position. However, it is also conceivable to use other types of sensors, such as proximity switches or light barriers.

[0031] With low actuation force of the first actuator unit, a secure locking of the housing parts can be achieved in a simple manner if it is provided that the locking element has a wedge surface, that the locking counter-element has a wedge receptacle, that the locking element is at least partially guided into the wedge receptacle when the first actuator unit is moved from the unlocked position to the locked position, when the housing part is in the closed position, whereby a wedge connection is formed by the interaction of the locking element with the locking counter-element in order to lock the housing parts together in the closed position.

[0032] A wedge connection offers the possibility of achieving high lateral force with minimal force required to adjust the locking element along its travel. In particular, a wedge connection can create tension between the housing parts, so that they are not only locked together but also pressed against each other by a clamping force. This allows for a largely flush fit between the housing parts, even if, for example, due to contamination, tolerances, and / or deformation, the housing parts do not fit together perfectly. In other words, the tension reduces the gap between the housing parts.

[0033] Furthermore, a wedge connection is also less susceptible to contamination and is therefore particularly suitable for use in material processing units.

[0034] It is also conceivable to make the wedge connection self-locking by appropriately selecting the angle of attack of the wedge surface of the locking element, so that the locking element is securely held in the wedge receptacle even when the first actuator unit is de-energized, for example in the event of a failure. This provides increased safety against opening the housing under unsafe operating conditions.

[0035] In a structurally simple manner, opening and / or closing can be made possible if it is provided that the second actuator unit has an actuating element and a transmission element adjustable relative to the actuating element between the opening position and the closing position, that the actuating element is connected on the one hand to the housing part or the further housing part, preferably pivotably, and that the transmission element is connected on the other hand to the further housing part or the housing part, preferably pivotably.

[0036] As previously described for the first actuator unit, the actuating element can preferably have a hydraulic cylinder, particularly preferably a double-acting hydraulic cylinder, or be designed as such, and is further preferably secured by means of a lowering / braking holding valve. In this case, the transmission element can be designed as a piston rod or have one.

[0037] The sensor designs proposed above for the first actuator unit can also be applied to the second actuator unit. Accordingly, the sensor can preferably be configured as a displacement measuring system, which can determine, based on the existing displacement of the transmission element relative to the actuating element, whether the second actuator unit is in the closed or open position. However, it is also conceivable to use other types of sensors, such as proximity switches or light barriers. Naturally, different types of sensors can be used for the second actuator unit than for the first actuator unit.

[0038] According to a preferred embodiment of the invention, it is proposed that the tool positioning device is pivotable about a pivot axis between the release position and the engagement position, that the tool positioning device has an eccentric shaft which is rotatably mounted about an eccentric axis spaced apart from the pivot axis, and that by means of a rotation of the eccentric shaft a pivoting of the tool positioning device between the release position and the engagement position is effected.

[0039] Thus, the tool positioning device can be pivoted around its pivot axis towards the element of the tool's drive train with which it is engaged in the engagement position. By pivoting away from the drive train element, the tool positioning device can be disengaged from it again.

[0040] The eccentric shaft can preferably be rotated manually, particularly preferably by means of a control element, especially a crank. However, it is also conceivable that the eccentric shaft is rotated by means of an auxiliary drive, for example by means of an electric motor. In this case, it is particularly conceivable that the auxiliary drive can be controlled by the control device.

[0041] According to an advantageous embodiment of the invention, it is proposed that the third actuator unit comprises a base body and a locking means adjustable relative to the base body between the engagement position state and the release position state along an adjustment path.

[0042] A constructive, easily implemented, cost-effective, safe and insensitive adjustability to contamination can be achieved in particular if the third actuator unit is designed as a locking magnet, especially if the base body has an electromagnet and the locking means is coupled to or formed by an armature rod of the locking magnet.

[0043] According to an advantageous embodiment of the invention, it is proposed that the eccentric shaft has a receptacle oriented along a receiving axis, in particular in the form of a bore, wherein the receiving axis is preferably oriented perpendicular to the eccentric axis, that the locking means is configured to engage in the receptacle in the engaged position to block rotation of the eccentric shaft about the eccentric axis, and that the locking means can only engage in the receptacle when the tool positioning device is in the engaged position. In particular, it can be provided that the adjustment path of the locking means is aligned with the receiving axis when the tool positioning device is in the engaged position.

[0044] This results in a secure locking of the tool positioning device in the engagement position. Furthermore, it is ensured that the third actuator unit can only be in the engagement position when the tool positioning device is in the engagement position, i.e., when the tool is secured against unintentional movement. Accordingly, a signal transmitted to the control unit by the sensor associated with the third actuator unit can clearly indicate whether the tool is secured.

[0045] The previously proposed embodiments of the sensors for the first and / or second actuator unit can also be applied to the third actuator unit. Accordingly, the sensor can preferably be configured as a displacement measuring system, which determines, based on the existing adjustment path of the locking element relative to the base body, whether the third actuator unit is in the engaged or released position. However, it is also conceivable to use other types of sensors, such as proximity switches or light barriers. It is also conceivable that the third actuator unit is assigned different types of sensors than the first and / or second actuator units.

[0046] Particularly for maintenance purposes, it can be advantageous if the tool, while secured against unintentional movement, can still be moved in a controlled manner. For example, it may be necessary to rotate a percussion rotor slightly to provide access to impact bars that may need to be replaced. According to a preferred embodiment of the invention, it is therefore proposed that the tool positioning device can effect movement of the tool even when the tool is not driven by the drive. Accordingly, it is not necessary to effect the desired movement of the tool by means of the drive. This is particularly advantageous since drives of material processing units can often provide high drive power and / or torque, which can pose a safety risk to a user. Therefore, a relatively low power output is preferred for the controlled movement of the tool.A relatively low torque is provided. In this context, it is particularly advantageous if the tool movement can be effected manually using the tool positioning device.

[0047] One variant of the invention may be such that the tool positioning device has a pinion which, in the engagement position of the tool positioning device, engages with a toothed ring, wherein the toothed ring is provided on the / a drive disc coupled to the tool.

[0048] If a belt drive is used to power the tool, providing a transmission between the drive and the tool, the drive pulley could, for example, be a pulley on which a drive belt can run. However, it is also conceivable that a gear transmission could be used between the drive and the tool. In this case, the drive pulley could be designed as a gear.

[0049] If it is further provided that the tool positioning device has an adjusting means, preferably in the form of a crank, with a shaft, and that a rotation of the shaft is translated into a rotation of the pinion by means of a gear, a movement of the tool can be carried out in a controlled manner and with low operating forces.

[0050] Preferably, the gearbox can be designed to be self-locking, such that rotation of the adjusting device's shaft cannot be caused by rotation of the pinion. For example, the gearbox could be designed as a worm gear. The self-locking feature ensures that the tool does not move unintentionally, while still allowing for easy achievement of the desired movement. It also prevents the adjusting device from performing uncontrolled movements, particularly if it is designed as a crank and a user releases the crank after actuation.

[0051] The problem relating to the method is solved by a method according to claim 15.

[0052] According to the invention, opening comprises the following steps: Deactivating the drive, adjusting the first actuator unit to the unlocked position, adjusting the second actuator unit to the open position.

[0053] Closing the process involves the following steps: Adjusting the second actuator unit to the closed position, adjusting the first actuator unit to the locked position.

[0054] Thus, during an opening process, preferably by the control device, the drive is first deactivated, whereby deactivation of the drive also includes confirming that the drive is already deactivated. Subsequently, the first actuator unit can be unlocked, preferably controlled by the control device, so that the housing part can then be opened by adjusting the second actuator unit, the adjustment of which is again preferably controlled by the control device.

[0055] During a closing process, the housing part can first be closed by means of the second actuator unit, preferably controlled by the control unit. Subsequently, the first actuator unit can, preferably also controlled by the control unit, lock the housing parts.

[0056] According to an advantageous embodiment of the invention, it is proposed that when opening, before the first actuator unit is moved to the unlocking position, a third actuator unit is moved to the engagement position, and that when closing, after the first actuator unit is moved to the locking position, the second actuator unit is moved to the release position.

[0057] The adjustment of the third actuator unit can also preferably be controlled by the control device.

[0058] The control unit can determine the position of the actuator units based on the sensors assigned to them. In particular, the control unit can preferably only allow the execution of a next step if the actuator unit adjusted in the previous step is in a permissible position.

[0059] It is conceivable that a user of the material processing unit could initiate one, several, or all of the aforementioned steps for opening and / or closing the housing section via the control unit. However, it is also conceivable that the user of the control unit could simply specify that the housing section should be opened or closed, and that the control unit would then execute the corresponding steps. For example, an operator panel or an external input / output device could be provided for the interaction between the user and the control unit.

[0060] The invention will be explained in more detail below with reference to an embodiment illustrated in the drawings. The drawings show: Figure 1 is a schematic representation of a material processing device 1 with a crushing unit 10 in side view. Figure 2 is a schematic representation of a crushing unit 10 in perspective view. Figure 3 is a schematic representation of a housing 70 in perspective view. Figure 4 is a schematic representation of a crushing unit 10 with the housing 70 open in side view. Figure 5 is a schematic representation of a tool positioning device 60 in perspective view. Figure 6 is a schematic representation of a third actuator unit 90. Figure 7 is a schematic perspective representation of an eccentric shaft 62.

[0061] Figure 1Figure 1 shows a material processing unit 1 in the form of a crushing plant with a material processing unit in the form of a crushing unit 10. The material processing unit is designed as a mobile material processing unit and therefore has chassis 1.5. However, it is also conceivable that the material processing unit 1 is a stationary material processing unit 1.

[0062] The material processing unit 1 has a chassis 1.1 which supports the machine components or at least some of the machine components. At its rear end, the chassis 1.1 has a boom 1.2. A material feed area is formed in the area of ​​the boom 1.2.

[0063] The material feed area includes a feed hopper 2 and a material feed device 9.

[0064] The feed hopper 2 can be formed, at least partially, by hopper walls 2.1 extending in the direction of the longitudinal extent of the material processing device 1 and a rear wall 2.2 extending transversely to the longitudinal extent. The feed hopper 2 leads to a material feeding device 9.

[0065] The material feeding device 9 can, as shown in the present embodiment, have a conveying trough which can be driven by a vibratory drive. Material to be crushed can be fed into the material processing device 1 via the feed hopper 2, for example by means of a wheel loader, and fed onto the conveying trough.

[0066] From the conveying trough, the material to be shredded enters the area of ​​a screening unit 3. This screening unit 3 can also be referred to as a pre-screening arrangement. At least one screen deck 3.1, 3.2 is arranged in the area of ​​the screening unit 3. In the present embodiment, two screen decks 3.1, 3.2 are used.

[0067] At the upper screen deck 3.1, a sub-fraction is screened out of the material to be crushed. This sub-fraction already has a sufficient particle size that no longer needs to be crushed in the material processing unit 1. Therefore, this screened sub-fraction can be routed in a bypass channel 3.5 past a crushing unit 10.

[0068] If a second screen deck 3.2 is used in the screening unit 3, a further fine particle fraction can be screened from the sub-fraction that accumulates below screen deck 3.1. This fine particle fraction can be conveyed below screen deck 3.2 to a side discharge conveyor 3.4. From the side discharge conveyor 3.4, the fine particle fraction is discharged and conveyed to a stockpile 7.2 located to the side of the machine.

[0069] How Figure 1 As illustrated, the screening unit 3 can be a vibrating screen with a screen drive 3.3. The screen drive 3.3 sets the screen deck 3.1 and / or the screen deck 3.2 into vibratory motion. Due to the inclined arrangement of the screen decks 3.1, 3.2, and in conjunction with the vibratory motion, material is transported on the screen decks 3.1, 3.2 towards the crushing unit 10 or the bypass channel 3.5.

[0070] The material to be crushed, coming from screen deck 3.1, is fed to the crushing unit 10, as shown here. Figure 1 This can be seen.

[0071] The crushing unit 10 can, for example, be designed in the form of a rotary impact crushing unit. The crushing unit 10 then has a percussion rotor 11 which is driven by a drive 12. In Figure 1 The rotation axis 17 of the blow rotor 11 runs horizontally in the direction of the image depth.

[0072] The impact rotor 11 can, for example, be equipped with impact bars 11.2 on its outer circumference. Opposite the impact rotor 11, wall elements, preferably in the form of impact wings 20, can be arranged. When the impact rotor 11 is rotating, the material to be crushed is thrown outwards by the impact bars 11.2. This material then strikes the impact wings 20 and is crushed due to the high kinetic energy. If the material to be crushed has a sufficient particle size to allow the material particles to pass through a crushing gap 15 between the impact wings 20 and the radially outer ends of the impact bars 11.2, the crushed material leaves the crushing unit 10 via the crusher outlet 16.

[0073] It is conceivable that in the area of ​​the crusher outlet 16, the crushed material coming from the crushing unit 10 is combined with the material coming from the bypass channel 3.5 and conveyed onto a belt conveyor 1.3. The belt conveyor 1.3 can then be used to remove the material from the working area of ​​the crushing unit 10.

[0074] As the drawings show, the belt conveyor 1.3 can have an endlessly circulating conveyor belt with a loaded side 1.6 and an unloaded side 1.7. The loaded side 1.6 serves to collect and transport the crushed material that falls from the crusher outlet 16 of the crushing unit 10. At the belt ends, the conveyor belt can be deflected between the loaded side 1.6 and the unloaded side 1.7 by means of deflection rollers 1.4. In the area between the deflection rollers 1.4, guides, in particular support rollers, can be provided to change the conveying direction of the conveyor belt, to give the conveyor belt a specific shape, and / or to support the conveyor belt.

[0075] The belt conveyor 1.3 has a belt drive by means of which the belt conveyor 1.3 can be driven. The belt drive can preferably be arranged at the discharge end 1.9 or in the area of ​​the discharge end 1.9 of the belt conveyor 1.3.

[0076] The belt conveyor 1.3 can be connected to a control unit via a control line, for example by means of the belt drive.

[0077] One or more additional belt conveyors 6 and / or a return conveyor 8 may be used, which in principle have the same design as the belt conveyor 1.3. In this respect, reference can be made to the above explanations.

[0078] In the area between the feed end and the discharge end 1.9, a magnet 1.8 can be arranged above the load section 1.6. The magnet 1.8 can be used to lift iron parts from the broken material and move them out of the conveying area of ​​the belt conveyor 1.3.

[0079] In the transport direction after the belt conveyor 1.3, a secondary screening device 5 can be arranged. The secondary screening device 5 has a screen housing 5.1 in which at least one screen deck 5.2 is housed. Below the screen deck 5.2, a lower housing part 5.3 is formed, which serves as a collection chamber for the material screened out at the screen deck 5.2.

[0080] The lower housing section 5.3 creates a spatial connection to another belt conveyor 6 via an opening. Here, the second belt conveyor 6 forms its feed section 6.1, whereby the screened material in feed section 6.1 is directed onto the load side of the second belt conveyor 6. The second belt conveyor 6 conveys the screened material to its discharge end 6.2. From there, the screened material reaches a stockpile 7.1.

[0081] The material not screened at the screen deck 5.2 of the secondary screen 5 is conveyed from the screen deck 5.2 onto a conveyor belt 5.4. The conveyor belt 5.4 can also be designed as a belt conveyor, so reference can be made to the explanations given above regarding the belt conveyor 1.3. The conveyance direction of the conveyor belt 5.4 is in Figure 1 in the direction of the image depth.

[0082] At its discharge end, the conveyor belt 5.4 transfers the unsifted material, also known as oversize, to the feed area 8.1 of the return conveyor 8. The return conveyor 8, which can be configured as a belt conveyor, conveys the oversize towards the feed hopper 2. At its discharge end 8.2, the return conveyor 8 transfers the oversize back into the material flow, specifically into the material feed area. The oversize can then be fed back to the crushing unit 10 and crushed there to the desired particle size.

[0083] Figure 2 Figure 1 shows a schematic representation of a material processing unit in the form of a crushing unit 10 with a housing 70.

[0084] The housing 70 can include an internal receiving chamber, which, as in the present case of a crushing unit 10, can be a crushing chamber 16.1. Material to be crushed can be fed into the crushing chamber 16.1 via a crusher inlet 14. Crushed material can leave the crushing chamber 16.1 via a crusher outlet 16. The crusher inlet 14 and crusher outlet 16 can be provided as openings in the housing 70.

[0085] A movable tool can be at least partially housed within the receiving chamber. The embodiment shown in the figures depicts a crushing unit 10 in the form of a rotary impact crusher. Accordingly, a percussion rotor 11 can be housed within the crushing chamber 16.1. The percussion rotor 11 can be rotatably mounted about a rotational axis 17 and have a rotor shaft 11.3.

[0086] A drive pulley 67 can be coupled to the rotor shaft 11.3. The drive pulley 67 can be designed as a belt pulley, as shown here. The impact rotor 11 can be driven by a drive 12, for example by means of a belt drive, via the drive pulley 67. The drive 12, the drive pulley 67, and / or the rotor shaft 11.3 can thus be parts of a drive train for the tool, in this case, the impact rotor 11.

[0087] A control device may be provided by means of which the drive 12 can be controlled. Thus, the control device may be configured to transmit operating parameters to the drive 12, such as a desired speed, a desired power, and / or a desired torque, and to query corresponding operating data from the drive 12. The control device may also be configured to activate and / or deactivate the drive 12.

[0088] Preferably, means, in particular sensors, can be provided on the tool or on the drive train to determine the tool's state of motion, for example, the rotational speed of the impact rotor 11. The state of motion can be transmitted to and / or queried by the control unit.

[0089] The drive disc 67 can have suitable means that enable engagement of a tool positioning device 60. As shown here, the drive disc 67 can have a toothed ring 68 for this purpose, which can be engaged with a pinion 64 of the tool positioning device 60. By means of the tool positioning device 60, the impact rotor 11 can be secured against unintentional movement and / or moved in a controlled manner. The design and operation of a possible embodiment of the tool positioning device 60 will be discussed in more detail later.

[0090] Furthermore, at least one impact arm 20 can be accommodated within the housing 70, as shown in the following. Figure 1 The impact arm 20 can be pivotally mounted about a swing axis 21.1. For example, the impact arm 20 can have a swing shaft 21.2 which is rotatably mounted on the housing 70 by means of swing bearings 21.

[0091] A crushing gap 15 can be formed between an end of the impact arm 20 facing away from the rocker bearings 21 and an outer circumference of the impact rotor 11. To allow adjustment of the gap width of the crushing gap 15, a gap adjustment device 30 can be provided. For example, this can be a hydraulic gap adjustment device 30 with a preferably double-acting gap adjustment cylinder and a piston rod adjustable relative to the gap adjustment cylinder. The gap adjustment device 30 can be coupled to the housing 70 on one side and to the impact arm 20 at a distance from the rocker axis 21.1 on the other. Thus, an adjustment of the gap adjustment device 30 can cause the impact arm 20 to pivot, thereby adjusting the gap width of the crushing gap 15.

[0092] The crushing unit 10 can further include an overload device 35. The overload device 35 can allow the impact arm 20 to deflect, for example, if uncrushable material is present in the crushing chamber 16.1. In such a case, the uncrushable material can exert a large force on the impact arm 20, which can be transmitted to the gap adjustment mechanism 30. The overload device 35 can therefore preferably be coupled to the gap adjustment mechanism 30. In particular, it can be a hydraulic overload device 35, for example, an overload valve. The force acting on the gap adjustment mechanism 30 in the event of an overload can cause an impermissibly high pressure within the hydraulic gap adjustment cylinder. By means of the overload device 35, the pressure within the gap adjustment cylinder can be at least partially reduced, so that the impact arm 20 can deflect away from the impact rotor 11.This allows the breaking gap 15 to be enlarged, so that the unbreakable material can leave the breaking chamber 16.1.

[0093] How Figure 2 As can be further seen, the housing 70 can be divided along a housing division 70.1 and comprise a housing part 76 and a further housing part 71. The crushing unit 10 can also have a base part 13, which can form a stable frame for receiving parts of the crushing unit 10. For example, the further housing part 71 can be connected to the base part 13 in a suitable manner, for example by screwing. Rotary bearings for the rotor shaft 11.3 of the impact rotor 11 can also be provided on the base part 13.

[0094] The housing part 76 can be adjustable relative to the further housing part 71 between a closed position and an open position. According to the embodiment shown in the figures, the housing part 76 can be pivotally mounted relative to the further housing part 71 about a pivot axis 75.1. Accordingly, the housing part 76 can be moved from the closed position, as shown in the Figures 2 and 3 is shown, to move the pivot axis 75.1 into the open position, as shown in Figure 4 As shown, it can be swivelled. In doing so, the housing parts 76, 71 can be separated from each other at the housing division 70.1.

[0095] In particular, at least one pivot bearing 75 can be provided to enable the pivotability of the housing part 76 relative to the other housing part 71. For this purpose, for example, bearing bosses 76.2 can be provided on the housing part 76 (see figure). Fig. 3The bearing bosses 76.2 can have passages 76.3 through which a bearing pin 75.2 of the pivot bearing 75 can be guided. Alternatively, the bearing pin 75.2 can be guided through bearing bores 13.2 of bearing bosses 13.1, which are directly or indirectly coupled to the further housing part 71. As shown here, the bearing bosses 13.1 can be provided on the base part 13 of the crushing unit 10. However, it is also conceivable that the bearing bosses 13.1 are provided on the further housing part 71.

[0096] As in Figure 3As can be seen, the housing part 76 can have an upper wall 76.1 and two side walls 78. The housing division 70.1 can be provided in the area of ​​the side walls 78. The side walls 78 can be made of sheet metal and have reinforcing elements 78.1, in this case in the form of ribs. Along the housing division 70.1, first upper flanges 78.3 and second upper flanges 78.4 can be provided on the side walls 78. The upper flanges 78.3, 78.4 can be angled from the side wall 78, in particular at right angles. As shown here, the upper flanges 78.3, 78.4 can form a termination of the side wall 78 in the area of ​​the housing division 70.1.

[0097] The further housing part 71 can also have first lower flanges 72.3 and second lower flanges 72.4 in the area of ​​the housing division 70.1. When the housing part 76 is in the closed position, as shown in the Figures 2 and 3As shown, the housing parts 76, 71 with their flanges 78.3 and 72.3 as well as 78.4 and 72.4 can lie on top of each other at least partially along the housing division 70.1.

[0098] Also in Figure 3 A possible embodiment of a first actuator unit 80 is described in more detail. The first actuator unit 80 can serve to lock the housing part 76 in the closed position in a locking state and to unlock it in an unlocking state. The first actuator unit 80 can have an actuating element 81 and a locking element 82 that is adjustable relative to the actuating element 81. The actuating element 81 can, for example, be designed as a hydraulic cylinder. In this case, the locking element 82 can, for example, be coupled to a transmission element 81.1 designed as a piston rod, as shown here.

[0099] The control device can control the first actuator unit 80 and consequently cause an adjustment of the first actuator unit 80 between locking position and unlocking position.

[0100] The locking element 82 can interact with a locking counterpart 77 to effect a locking action between the housing parts 71, 76. For this purpose, the first actuator unit 80 can be connected to one of the housing parts 71, 76, and the locking counterpart 77 to the other of the housing parts 71, 76. The locking counterpart 77 can have a suitable receptacle to receive the locking element 82 when the first actuator unit 80 is moved into the locked position.

[0101] As shown here, the locking counter-element 77 can accordingly have a wedge receptacle 77.1 into which the locking element 82, designed as a wedge with a wedge surface 82.1, can be at least partially inserted. Through the interaction of the wedge surface 82.1 with the wedge receptacle 77.1, an increasing tension between the locking element 82 and the locking counter-element 77 can thus be achieved, at least in certain areas along the adjustment path of the locking element 82 from the unlocked position to the locked position, in a direction perpendicular to the adjustment path. Thus, the housing parts coupled to the first actuator unit 80 or the locking counter-element 77 can also be increasingly tensioned against each other.

[0102] The first actuator unit 80 can be assigned a sensor that can detect at least the locking position and / or the unlocking position of the first actuator unit 80. This sensor is preferably a displacement measuring system. However, it is also conceivable to use other types of sensors, such as proximity sensors or light barriers. The position of the first actuator unit 80 detected by the sensor can be transmitted to the control unit.

[0103] In this case, the first actuator unit 80 is coupled to the further housing part 71. For this purpose, a connection 81.2 can be provided on the second lower flange 72.4 of the further housing part 71, to which the actuating element 81 of the first actuator unit 80 can be connected. For example, the connection 81.2 can be a bore in the second lower flange 72.4 in which a fastening element 81.3, for example a screw, can be received to secure the actuating element 81.

[0104] The locking counter-element 77 can be coupled to the housing part 76 as shown here. For example, the locking counter-element 77 can be provided in the area of ​​the second upper flange 78.4 of the housing part 76. In particular, a fastening section 77.2 of the locking counter-element 77 can be connected to the side wall 78 of the housing part 76, for example by welding. The locking counter-element 77 can project beyond the housing division 70.1 towards the further housing part 71, in particular with its wedge receptacle 77.1. An opening can be provided in the second lower flange 72.4 of the further housing part 71 through which the locking counter-element 77 can be guided, at least partially, when the housing 70 is closed. The locking counter-element 77 can therefore be located, in particular with its wedge receptacle 77.1, in an area along the travel path of the first actuator unit 80.

[0105] How Figure 3As can be further seen, the adjustment path of the first actuator unit 80 can be oriented essentially along the second lower flange 72.4 and / or along the housing division 70.1. Thus, the clamping effect between locking element 82 and locking counter-element 77 can advantageously cause a clamping of the housing part 76 with the further housing part 71, in particular between the second upper flange 78.4 and the second lower flange 72.4, essentially perpendicular to the adjustment path.

[0106] Preferably, the coupling between the locking element 82 and the actuating element 81 can be designed to be flexible perpendicular to the adjustment path in the direction of the clamping force, for example, a pivot connection with a pivot axis oriented perpendicular to the adjustment path of the first actuator unit 80. It is particularly preferred that only a pivoting of the locking element 82 through a small angle, for example less than 10°, less than 5°, or a maximum of 1°, is permitted. In this way, dimensional tolerances can be compensated for. Furthermore, the force required to adjust the locking element 82 into the closed position can be optimized and converted into a clamping force between the housing parts 76, 71.

[0107] To enable convenient and safe adjustment of the housing part 76 between the open and closed positions, a second actuator unit 85 can be provided, as further described in Figure 3The second actuator unit 85 can have an actuating element 86 and a transmission element 87 that is adjustable relative to the actuating element 86. The actuating element 81 can, for example, be designed as a hydraulic cylinder, preferably a double-acting one. In this case, the transmission element 87 can be designed as a piston rod.

[0108] The second actuator unit 85 can be pivotally coupled to the housing part 76 on one side and to the further housing part 71 on the other. It is also conceivable that the second actuator unit 85 is pivotally coupled to the housing part 76 on one side and to the base part 13 on the other. In both cases, the second actuator unit 85 can be adjusted from a closed position (see Figure 1). Fig. 3 ) into an open position (see Fig. 4 ) cause an adjustment of the housing part 76 from the closed position to the open position and vice versa.

[0109] The control unit can control the second actuator unit 85 and consequently cause the second actuator unit 85 to be adjusted between the open position and the closed position.

[0110] The second actuator unit 85 can be assigned a sensor that can detect at least the open and / or closed positions of the second actuator unit 85. This sensor is preferably a displacement measuring system. However, it is also conceivable to use other types of sensors, such as proximity sensors or light barriers. The position of the second actuator unit 85 detected by the sensor can be transmitted to the control unit.

[0111] As shown, the actuating element 86 can be coupled to the housing part 76 by means of a pivot bearing 86.1. For this purpose, a connecting element 78.2 can be provided on the side wall 78 of the housing part 76. The connecting element 78.2 can, for example, be plate-shaped and, in particular, welded to the side wall 78. The transmission element 87 can be coupled to the further housing part 71 by means of a pivot bearing 87.1. The second actuator unit 85, in particular the transmission element 87, can be at least partially covered by a cover 87.2 to reduce the risk of contamination or unintentional intervention by a user.

[0112] The housing 70 can further comprise one or more positioning elements 79 that can engage in associated positioning openings 72.6 to provide improved positional alignment between the housing parts 76, 71 in the closed position. As in the illustrated embodiment, the positioning elements 79 can be designed as projections. For example, the positioning elements 79 can be provided on the side wall 78 of the housing part 76 and project at least partially beyond the housing division 70.1 towards the further housing part 71. Accordingly, the positioning openings 72.6 can be arranged on the first lower flange 72.3 and / or on the second lower flange 72.4 of the further housing part 71. Of course, a reversed or combined arrangement is also conceivable.

[0113] In Figure 4A schematic side view of an open housing 70 is shown. The housing part 76 is thus in the open position. As can be clearly seen in the illustration, this provides access to an interior of the housing 70, in this case to the crushing chamber 16.1. This access can significantly facilitate maintenance work on components inside the housing 70. In particular, it provides access to the tools, in this case, for example, to the impact rotor 11. This allows, for example, an examination of the wear condition of the tool, such as the impact bars 11.2 provided on the impact rotor 11.

[0114] How Figure 4Furthermore, as shown, the crushing unit 10 can have a lifting device 100. The lifting device 100 can be used, for example, to lift parts to be replaced, such as impact bars 11.2, out of and / or into the crushing chamber 16.1. The lifting device 100 can have a column 101 to which a boom 102 is attached. Preferably, the column 101 can be pivotably connected to the further housing part 71, and particularly preferably to the base part 13. A trolley 103 can be mounted adjustably along the boom 102. Lifting means 104, for example in the form of a drive and / or a traction element, such as a rope or chain, and / or a receiving element, such as a hook or clamp, for connecting to a part to be replaced, can be provided on the trolley 103. A part to be replaced can thus be connected to the traction element by means of the receiving device and lifted by the drive.By adjusting the trolley 103 and / or swiveling the boom 102, the part to be replaced can be moved into and / or out of the area of ​​the crushing chamber 16.1.

[0115] In Figure 5 An embodiment of the tool positioning device 60 can be seen in more detail. The tool positioning device 60 can be pivotally mounted about a pivot axis 60.1. For example, the tool positioning device 60 can have a base body 63 on which a bearing receptacle 63.2 is provided. A bearing bolt 60.2 can be rotatably mounted in the bearing receptacle 63.2 with a first end region. An opposite end region of the bearing bolt 60.2 can, for example, be fixed to the further housing part 71. Preferably, however, according to the illustrated embodiment, the opposite end region of the bearing bolt 60.2 can be fixed to a connecting element 13.3, preferably in the area of ​​a bearing point 13.4, of the base part 13 (see figure 13.3). Figure 2 ).

[0116] An eccentric shaft 62 can be rotatably mounted on the base body 63 at a distance from the pivot axis 60.1. For this purpose, the base body 63 can have a bearing receptacle 63.3 in which the eccentric shaft 62 can be received. An eccentric disc 66 can be non-rotatably connected to the eccentric shaft 62. The eccentric disc 66 can, for example, have an eccentrically arranged bore with which it engages an end region 62.3 (see figure). Fig. 7 ) the eccentric shaft 62 may be mounted on.

[0117] It is conceivable that a mounting receptacle 62.4 is provided in the end region 62.3, which is aligned with a mounting receptacle 66.4 of the eccentric disc 66. A fastening element guided through both mounting receptacles 62.4, 66.4, for example a pin, bolt or wedge, can thus create a rotationally fixed connection between the eccentric shaft 62 and the eccentric disc 66.

[0118] The eccentric disc 66 can slidably rest against an element of the further housing part 71 or the base part 13 with a circumferential surface 66.1. For example, a frame-like bearing for the eccentric disc 66 can be provided on the base part 13. Thus, a rotation of the eccentric shaft 62 about the eccentric axis 62.8 can cause a pivoting movement of the tool positioning device 60 about the pivot axis 60.1.

[0119] The eccentric shaft 62 can preferably be operated manually, in particular by means of a control element 61 (see below). Fig. 4 ) can be rotated. The control element 61 can be designed as a crank. The connection between the control element 61 and the eccentric shaft 62 can be detachable. For example, as shown in Figure 7The eccentric shaft 62 can be seen to have a positive locking element 62.7, for example in the form of a square profile, which can be joined with a correspondingly shaped element, for example a square receptacle, of the operating element 61.

[0120] The eccentric shaft 62 can have a stop 62.6. The stop 62.6 can be designed as a radially projecting, circumferentially limited, formed portion on a shaft 62.1 of the eccentric shaft 62. The stop 62.6 can prevent the eccentric shaft 62 from rotating beyond the intended travel of the tool positioning device 60 between the engagement position and the release position. The stop 62.6 can come into contact with counter-stops when a permissible travel is reached. The counter-stops can, for example, be provided on the base body 63 of the tool positioning device 60.

[0121] A pinion 64 can be rotatably mounted on the base body 63 of the tool positioning device 60 about a pivot axis 64.1. Furthermore, the tool positioning device 60 can have an adjusting means 65, which, as shown, is preferably designed as a crank, particularly preferably with a lever 65.1 and a handle 65.2 preferably rotatably mounted on the lever 65.1. The adjusting means 65 can have a shaft 65.3 which is rotatably mounted on the base body 63 about a pivot axis 65.5.

[0122] The tool positioning device 60 can further comprise a transmission that can translate between a rotation of the pinion 64 and a rotation of the shaft 65.3. Accordingly, a rotation of the shaft 65.3, for example by actuating the adjusting device 65, in particular the crank, can cause a rotation of the pinion 64. Preferably, a self-locking transmission can be used here. Accordingly, a transmission can be used that allows the pinion 64 to be driven via the adjusting device 65, but prevents the adjusting device 65 from being driven via the pinion 64. It is conceivable that a worm gear is used.

[0123] Thus, the tool positioning device 60 can be used to move the tool, in this case the impact rotor 11, independently of the drive 12. This can be particularly helpful for gaining access to areas that are initially inaccessible. For example, in the case of an impact rotor 11, these could be impact bars 11.2, which, when the impact rotor 11 is in a given rotational position, lie in a circumferential area below the axis of rotation 17. These can be rotated upwards by a controlled rotation of the impact rotor 11, where they can be more easily accessed.

[0124] Furthermore, the tool positioning device 60, particularly due to its self-locking design, prevents the tool, in this case the impact rotor 11, from moving unintentionally. Such unintentional movement can pose a significant risk of injury if, for example, persons have access to the crushing chamber 16.1 for maintenance work.

[0125] Again Figure 5 As can be further seen, a third actuator unit 90 can be assigned to the tool positioning device 60. The third actuator unit 90 can be configured to block the tool positioning device 60 in the engagement position when engaged. Accordingly, the third actuator unit 90 ensures that the tool is secured against unwanted movement.

[0126] In Figure 6A possible embodiment of a third actuator unit 90 is shown in more detail. Accordingly, the third actuator unit 90 can have a base body 91 and a locking means 95 that is adjustable relative to the base body 91 along an adjustment path 95.1 between the engagement position and the release position.

[0127] The control unit can control the third actuator unit 90 and consequently cause an adjustment of the third actuator unit 90 between intervention position state and release position state.

[0128] Preferably the third actuator unit 90 can be designed as a locking magnet, wherein the base body 91 has an electromagnet and an armature rod of the locking magnet has the locking means 95.

[0129] The third actuator unit 90 can be assigned a sensor that can detect at least the engagement state and / or the release state of the third actuator unit 90. This sensor is preferably a displacement measuring system. However, it is also conceivable to use other types of sensors, such as proximity sensors or light barriers. The position of the third actuator unit 90 detected by the sensor can be transmitted to the control unit.

[0130] The base body 91 can be provided with a mounting section 92 for connection to the tool positioning device 60. The mounting section 92 can, for example, have threaded bores that can be aligned with screw receptacles on a mounting boss 63.1 of the tool positioning device 60 to create a screw connection. The third actuator unit 90 can thus be fixed to the tool positioning device 60 (see also Fig. 5 ).

[0131] The third actuator unit 90 may also have a connection area 93 for a power supply and / or communication with a sensor and / or the control device.

[0132] A secure locking of the tool positioning device 60 in the engagement position can be achieved, for example, as described here, by allowing the locking element 95 of the third actuator unit 90 to engage in a receptacle 62.2 on the eccentric shaft 62 when the tool positioning device 60 is in the engagement position. Preferably, the receptacle 62.2 is designed as a recess corresponding at least partially to the locking element 95, with a receiving axis 62.9 preferably oriented perpendicular to the eccentric axis 62.8. This ensures that the receiving axis 62.9 is only aligned with the adjustment path 95.1 when the tool positioning device 60 is in the engagement position. Otherwise, the locking element 95 would be prevented from moving along the adjustment path 95.1 from the release position to the engagement position by striking the shaft 62.1 of the eccentric shaft 62 is blocked. Accordingly, it can be ensured that the tool positioning device 60 is in the engagement position, and thus the tool is secured against unintentional movement, when the third actuator unit 90 is in the engagement positioning state.

[0133] The following section explains in more detail the functionality of the presented embodiment using a possible design of an opening and closing process of the housing part 76.

[0134] To gain access to the interior of housing 70, a user can initiate an opening process via the control device. For example, they can issue an opening command via an operating panel of the control device or via an external input / output device.

[0135] The control unit can now ensure that the drive 12 is deactivated. To do this, it can deactivate the drive 12 and / or query whether the drive 12 is already deactivated. Preferably, the control unit can query the current movement state of the tool.

[0136] When the drive 12 is deactivated, and preferably when the tool is at a standstill, the control device can instruct the user, for example via an operating panel or an external input / output device, to move the tool positioning device 60 into the engagement position.

[0137] Accordingly, the user can now pivot the tool positioning device 60 about the pivot axis 60.1 from the release position to the engagement position using the control element 61. The user can inform the control unit that the tool positioning device 60 is in the engagement position. Alternatively, a sensor could be provided that detects whether the tool positioning device 60 is in the engagement and / or release position and transmits this information to the control unit. It is also conceivable that the tool positioning device 60 is automatically moved into the engagement position upon activation by the control unit, for example, by an actuator.

[0138] When the tool positioning device 60 is in the engagement position, the control unit can activate the third actuator unit 90 to move it from the release position to the engagement position. Accordingly, the locking means 95 can engage in the receptacle 62.2 and thus lock the tool positioning device 60 in the engagement position.

[0139] The position determined by the sensor assigned to the third actuator unit 90 can be transmitted to the control unit. If the third actuator unit 90 is in the engagement position, the control unit can activate the first actuator unit 80 to change it from the locking position to the unlocking position.

[0140] Accordingly, the locking of the housing parts 76, 71 can be released by disengaging the locking element 82 from the locking counter-element 77.

[0141] The position determined by the sensor assigned to the first actuator unit 80 can now be transmitted to the control unit. When the unlocking position is present, the control unit can activate the second actuator unit 85 to change it from the closed position to the open position.

[0142] Thus, access to the interior of housing 70 can now be created.

[0143] The closing of the interior of housing 70 can be initiated by the user again via the control device as previously described for the opening process.

[0144] The control unit can control the second actuator unit 85 to change it from the open position to the closed position. The position can then be transmitted back to the control unit.

[0145] When the closing position of the second actuator unit 85 is present, the control unit can activate the first actuator unit 80 to move it into the locking position, thus locking the housing parts 76 and 71 together. The position can then be transmitted back to the control unit.

[0146] When the first actuator unit 80 is in the locking position, the control unit can activate the third actuator unit 90 to move it into the release position. Accordingly, the locking element 95 can then be disengaged from the receptacle 62.2, allowing the tool positioning device 60 to be moved from the engagement position to the release position.

[0147] For example, the control unit can instruct the user to move the tool positioning device 60 into the release position. It is also conceivable that the control unit can control an automated movement of the tool positioning device 60 into the release position.

[0148] The closing process can now be completed.

[0149] The user can confirm to the control unit that the tool positioning device 60 is in the release position, or, in particular in the case of automated adjustment of the tool positioning device 60, this information can be transmitted automatically.

[0150] Driving the tool by the drive 12 may now be permissible. For example, the drive 12 can be restarted by the control device, particularly at the user's instruction.

Claims

1. A material processing unit, in particular crusher unit (10), having a housing (70), in which at least one movable tool driven by a drive (12), in particular an impact rotor (11), a crushing jaw or a crushing cone, is at least partially accommodated in a mounting space, in particular a crushing space (16.1), wherein the housing (70) has a housing part (76), which can be moved between an open position and a closed position relative to at least one further housing part (71), and which in the open position provides access to the mounting space, wherein a safety device is provided, which prevents the housing part (76) from being moved into the open position when the tool is driven and / or prevents the tool from being driven by the drive (12) in the open position of the housing part (76), characterized in that the safety device comprises at least two actuator units (80, 85) and a control device, wherein the first actuator unit (80) locks the housing part (76) in the closed position in a locked actuation state and unlocks it in an unlocked actuation state, in that a second actuator unit (85) causes and / or supports or at least permits a movement of the housing part (76), wherein the second actuator unit (85) takes a closed actuation state in the closed position of the housing part (76) and an open actuation state in the open position, in that at least one sensor each is assigned to the at least two actuator units (80, 85) for detecting an actuation state, and in that the control device is designed to control the drive (12) and the actuator units (80, 85) and to receive the actuation states detected by the sensors.

2. The material processing unit according to claim 1, characterized in that the control device permits a movement of the second actuator unit (85) only when the first actuator unit (80) is in the unlocked actuation state.

3. The material processing unit according to claims 1 or 2, characterized in that a tool setting device (60) is provided, which, in an engaged position, is in engagement with an element of a drive train of the tool, in particular with a rotor shaft (11.3) or a drive disk (67), wherein the tool setting device (60) in the engaged position prevents driving of the tool caused by the drive (12) and / or a motion of the tool caused by inertial forces, in that a third actuator unit (90) is provided, wherein the third actuator unit (90) can assume an engagement actuation state and / or a release actuation state, and in that the third actuator unit (90) in the engagement actuation state blocks the tool setting device (60) in the engaged position and / or releases it in the release actuation state.

4. The material processing unit according to any of claims 1 to 3, characterized in that the control device permits the tool to be driven only when the first actuator unit (80) is in the locked actuation state and the second actuator unit (85) is in the closed actuation state, and preferably the / a third actuator unit (90) is in the / a release actuation state.

5. The material processing unit according to claims 3 or 4, characterized in that the control device only permits the first actuator unit (80) to be moved into the unlocked actuation state and / or the second actuator unit (85) to be moved into the open actuation state, when the third actuator unit (90) is in the engagement actuation state.

6. The material processing unit according to any of claims 1 to 5, characterized in that the control device permits a movement of the first actuator unit (80) into the unlocked actuation state and / or a movement of the second actuator unit (85) into the open actuation state and / or a movement of the / a third actuator unit (90) in to the / an engagement actuation state only when the tool is not driven by the drive (12), preferably when the tool is not in motion.

7. The material processing unit according to any of claims 1 to 6, characterized in that the first actuator unit (80) has an actuator element (81), preferably in the form of a hydraulic cylinder, and a locking element (82), which can be moved between the locked actuation state and the unlocked actuation state with respect to the actuator element (81) and is preferably coupled to a transmission element (81.1), in particular to a piston rod, and in that the locking element (82) and a locking counter locking element-element (77) form a frictional and / or form-locked connection between the housing part (76) and the further housing part (71) to interlock the housing parts (76, 71) in the closed position in a locked actuation state.

8. The material processing unit according to claim 7, characterized in that the locking element (82) has a wedge surface (82.1), in that the counter locking element (77) has a wedge mount (77.1), in that the locking element (82) is guided at least partially into the wedge mount (77.1) when the housing part (76, 71) is in the closed position during a movement of the first actuator unit (80) from the unlocked actuation state to the locked actuation state, wherein a wedge connection is formed by the interaction of the locking element (82) with the counter locking element (77) to interlock the housing parts (76, 71) in the closed position.

9. The material processing unit according to any of claims 1 to 8, characterized in that the second actuator unit (85) has an actuator element (86), preferably in the form of a hydraulic cylinder, and a transmission element (87), preferably in the form of a piston rod, which can be moved between the open actuation state and the closed actuation state with respect to the actuator element (86), in that the actuator element (86) is connected, preferably swivel connected, on the one hand to the housing part (76) or to the further housing part (71), and in that the transmission element (87), on the other hand, is connected, preferably swivel connected, to a further housing part (71) or to the housing part (76).

10. The material processing unit according to any of claims 3 to 9, characterized in that the tool setting device (60) can be swiveled about a swivel axis (60.1) between the release position and the engaged position, in that the tool setting device (60) has an eccentric shaft (62) which is mounted for rotation about an eccentric axis (62.8) spaced apart from the swivel axis (60.1), wherein the eccentric shaft (62) is preferably manually rotatable, particularly preferably by means of an operating element (61), in particular a crank, and in that a rotation of the eccentric shaft (62) causes a swiveling of the tool setting device (60) between the release position and the engaged position.

11. The material processing unit according to claim 10, characterized in that the third actuator unit (90) comprises a base body (91) and a locking means (95) movable relative to the base body (91) along a displacement path (95.1) between the engagement actuation state and the release actuation state, wherein the third actuator unit (90) is preferably designed as a locking magnet, in particular the base body (91) comprises an electromagnet, and the locking means (95) is coupled to an armature rod of the locking magnet or is formed by such an armature rod.

12. The material processing unit according to claim 11, characterized in that the eccentric shaft (62) has a mount (62.2), in particular in the form of a bore, oriented along a mounting axis (62.9), wherein the mounting axis (62.9) is preferably oriented perpendicular to the eccentric axis (62.8), in that the locking means (95) is designed to engage with the mount (62.2) in the engagement actuation state to block rotation of the eccentric shaft (62) about the eccentric axis (62.8), and in that the locking means (95) in the mount (62.2) can only engage with the mount (62.2) when the tool setting device (60) is in the engaged position, wherein preferably the displacement path (95.1) of the locking means (95) is aligned with the receiving axis (62.9) when the tool setting device (60) is in the engaged position.

13. The material processing unit according to any of claims 3 to 12, characterized in that a motion of the tool can be caused by means of the tool setting device (60) when the tool is not driven by the drive (12), in particular that the motion of the tool can be caused manually by means of the tool setting device (60).

14. The material processing unit according to claim 13, characterized in that the tool setting device (60) comprises a pinion gear (64) engaged with a gear rim (68) in the engaged position of the tool setting device (60), wherein the gear rim (68) is provided on the / a drive disk (67) coupled to the tool, in that the tool setting device (60) has a setting means (65), preferably in the form of a crank, having a shaft (65.3), in that a rotation of the shaft (65.3) is translated into a rotation of the pinion (64) by means of a gearbox, wherein the gearbox is preferably self-locking in such that a rotation of the shaft (65.3) of the setting means (65) cannot be caused by a rotation of the pinion (64).

15. A method for opening and closing a housing part (76) of a housing (70) of a material processing unit according to any of claims 1 to 14, wherein the opening comprises the steps listed below: - deactivate the drive (12), - move the first actuator unit (80) into the unlocked actuation state, - move the second actuator unit (85) into the open actuation state, and wherein closing comprises the steps listed below: - move the second actuator unit (85) to the closed actuation state, - move the first actuator unit (80) to the locked actuation state.

16. The method according to claim 15, characterized in that, before the first actuator unit (80) is moved into the unlocked actuation state, the / a third actuator unit (90) is moved into the / an engagement actuation state, and in that, after the first actuator unit (80) has been moved into the locked actuation state, the second actuator unit (85) is moved into the release actuation state.