Material processing apparatus

Abstract

A material processing device, in particular a mobile mineral processing device, has a conveyor for transporting material to or from a material processing unit, wherein the conveyor has a proximal end region of a supply end and a distal end region of a delivery side, wherein an intermediate region of the conveyor is arranged between the proximal end region and the distal end region of the conveyor, wherein the conveyor is pivotably articulated at its proximal end region to a machine body by means of a hinge connection, and wherein the conveyor can be adjusted from a downwardly turned working position to an upwardly turned transport position by means of an actuating mechanism and the hinge connection. The hinge connection is part of an adjustment mechanism operated by an adjustment unit, which guides a proximal free end of the proximal end region of the conveyor during pivoting from the downwardly turned working position to the upwardly turned transport position, pivoting the conveyor at its proximal end and lifting it against the direction of gravity.

Description

TECHNICAL FIELD

[0001] The invention relates to a material processing plant, in particular a mobile mineral processing plant, having a conveyor belt for transporting material to or from a material processing unit, wherein the conveyor belt has a proximal end region on the infeed side and a distal end region on the discharge side, wherein an intermediate region of the conveyor belt is arranged between the proximal end region and the distal end region of the conveyor belt, wherein the conveyor belt is pivotably articulated at its proximal end region to a machine body by means of a hinge connection, and wherein the conveyor belt can be adjusted from a downwardly turned working position to an upwardly turned transport position by means of an actuator and the hinge connection. BACKGROUND

[0002] EP 2 837 583 A1 discloses a material processing plant having a crusher group for crushing mineral material as a material processing unit. A screening unit is arranged behind the crusher group. Material from the crusher group and crushed can be classified in the screening unit. A conveyor belt is arranged below the screening unit, which receives screened rock fractions at its proximal end region. The material conveyed here can be transported to its distal end by means of a transport belt and discarded there, for example onto a bulk material pile. In order to adjust the transport belt between a working position and a transport position, the transport belt can be pivoted relative to a machine frame of the material processing plant by means of a hinge connection. The pivoting takes place here about a pivot axis which extends essentially parallel to the ground.

[0003] EP 3 041 611 discloses a material processing plant which likewise has a crusher group. A plurality of transport belts are provided via which material to be crushed is fed to the crusher group or crushed material is guided out of the crusher group. In addition, a screening unit is provided for classifying the crushed material. The screening unit and the transport belts can be moved from an upright working position into a downwardly turned transport position.

[0004] The material processing plant according to the invention is used, for example, for crushing bulk material, for example coarsely crushed concrete or other mineral rock material, on site in a crusher group as a material processing unit at the construction site. The crushed material can then be further used directly on site or in another suitable manner.

[0005] A further material processing plant according to the invention is used for screening bulk material, for example mineral bulk material, in a screening unit which forms a material processing unit. Here, different rock fractions are formed. The rock fractions are then transported to a further material processing unit or to a bulk material pile.

[0006] In the scope of the invention, a combined material processing plant is also to be understood, in which the two machine types are combined and which accordingly has a crusher group and a screening unit, i.e. for example the above-mentioned EP 2837 583 A1.

[0007] After the work is completed, the material processing plant is reconfigured and placed in a transport configuration, which allows the material processing plant to be positioned in a space-saving manner on a low loader. For this purpose, the transport belt is pivoted in the material processing plant known from the prior art and placed in the transport position. SUMMARY

[0008] It is an object of the present invention to provide a material processing plant of the type mentioned in the opening part, by means of which a space-saving configuration can be achieved in a simple manner.

[0009] The invention is achieved in that the hinge connection is part of an adjustment mechanism operated by the adjustment unit, which guides the proximal free end of the proximal end region of the transport belt during the pivoting from the lowered work position to the upwardly pivoted transport position, so that the transport belt is pivoted at its proximal end and lifted against the direction of gravity.

[0010] According to the invention, therefore, the transport belt is pivoted from the lowered work position to the upwardly pivoted transport position against the direction of gravity and the proximal end is simultaneously lifted against the direction of gravity in this position. This is a significant difference from the prior art, in which the proximal end is first lowered in the adjustment movement of the transport belt. As a result, a pivoting region is required below the proximal end for the adjustment movement in order to avoid a collision with the ground. In contrast, the solution according to the invention requires less structural space below the proximal end. Accordingly, the proximal end region of the transport belt can be arranged more deeply in the work position and closely above the ground. As a result, the structural height required for the material processing plant can be reduced. Starting from the work position, the transport belt can then be simply pivoted into the transport position by means of the adjustment mechanism. In the transport position, the transport belt does not hinder the loading and transport of the material processing plant on a low loader.

[0011] According to a preferred variant design of the invention, it can be provided that the proximal end of the transport belt is arranged below the machine body of the material processing plant in the work position, so that the material conveying device of the material processing plant ends with its discharge region above the proximal end region of the transport belt against the direction of gravity, and in the transport position, the proximal end of the transport belt is laterally and horizontally spaced apart from the discharge region of the material conveying device.

[0012] One conceivable variant provides that the adjustment mechanism has a first link and a second link, the first link being pivotably coupled to the proximal end region of the conveyor belt by means of a first hinge and to the machine body of the material processing device by means of a second hinge, the second link being pivotably coupled to the proximal end region of the conveyor belt by means of a third hinge and to the machine body of the material processing device by means of a fourth hinge, and the first and third hinges being spaced apart from the proximal end at different distances. In this way, a four-hinge system is formed, by means of which the conveyor belt can be guided stably and safely during the pivoting movement in a simple manner. Here, the hinge axes formed by the hinges are preferably aligned parallel to one another. The proximal end of the conveyor belt is adjusted on a cam track by means of this mechanism. Here, depending on the geometry of the links and the positioning of the hinges, the cam track can be appropriately provided and adapted to the spatial relationships of the material processing device.

[0013] Here, if the first and second links are each provided on both sides of the proximal end region extending from the proximal end towards the distal end, a particularly stable suspension of the conveyor belt can be achieved, wherein the hinges of the links are each aligned in pairs with one another to form a common pivot axis.

[0014] For this purpose, it can be proposed in particular that the first link has a first lever length between the first and second hinges and the second link has a second lever length between the third and fourth hinges, and the lever lengths differ from one another. It can be proposed in particular here that the first link has a longer lever length than the second link, the first link being coupled closer to the proximal end of the conveyor belt by means of the second hinge. By means of this arrangement, the forces caused by the weight of the conveyor belt can be safely removed via the adjustment mechanism. In this way, the movement of the proximal end can be minimized.

[0015] Here, it can be proposed in particular that the ratio of the second lever length to the first lever length is chosen particularly preferably in the range from 1 :2 to 1 :3, particularly preferably in the range from 1 :2.3 to 1 :2.7.

[0016] In order to achieve a simple and space-saving design, it can be proposed that at least one of the links of the adjustment mechanism has a coupling piece to which a force transmission mechanism of the adjustment unit is coupled. The coupling piece is preferably used on the aforementioned link having the longer lever arm. Alternatively, the force transmission mechanism can also be coupled directly to the conveyor belt.

[0017] It can also be proposed that an actuator, in particular a linear actuator, preferably a hydraulic cylinder, is pivotably coupled to one of the links in order to achieve the adjustment of the conveyor belt between the working position and the transport position.

[0018] If the force transmission mechanism is proposed to be a traction mechanism, in particular a flexible member, a structure can be realized with small components and installation effort, which can be used to reliably adjust the conveyor belt, wherein the traction mechanism is coupled to an actuator of the adjustment unit, in particular to a motorized or hydraulic unit, preferably to a hydraulic cylinder. Here, for example, a rope or a chain can be used as traction mechanism.

[0019] In order to reliably secure the conveyor belt in the working position and / or in the transport position, it can be proposed that a holder is provided at the proximal end region of the conveyor belt, to which the securing element is connected by means of a first bearing, and that the securing element has a second bearing by means of which the securing element is fixed to a carrier of the material processing device in the working position and / or in the transport position of the conveyor belt.

[0020] For this purpose, it can also be proposed additionally or alternatively that a stop is provided at one of the links, which abuts against a counter stop of the material processing device in the working position and / or in the transport position. Here, a form-fitting abutment can be provided between the stop and the counter stop, so that the load of the conveyor belt can be reliably guided into the machine body.

[0021] One particularly preferred variant is that the conveyor belt has a base part forming the proximal end region, that the conveyor belt part is connected to the base part by means of a pivot bearing, and that the conveyor belt part can be pivoted relative to the base part by means of the pivot bearing, wherein preferably the pivot axis extends perpendicular to the conveying direction of the conveyor belt. Here, it can be proposed, inter alia, that the conveyor belt part forms the distal end region of the conveyor belt. The conveyor belt part can be pivoted relative to the base part to position the conveyor belt space-savingly. Correspondingly, the conveyor belt can be pivoted from its lowered working position into its raised transport position by means of the adjustment mechanism. In addition, the conveyor belt part can then be lowered relative to the base part. In other words, the conveyor belt part is then no longer aligned in extension relative to the base part, but is arranged at an angle relative to the base part. Here, preferably an angle is obtained between the longitudinal extension of the conveyor belt part and the longitudinal extension of the base part in the range between 45° and 135°, preferably in the range between 80° and 100°. Preferably, in the lowered position, the conveyor belt part abuts laterally against the material processing device. More preferably, the pivot axis of the pivot bearing is aligned transversely to the conveying direction of the conveyor belt. In particular, the pivot axis of the pivot bearing can be aligned transversely to the conveying direction of the conveyor belt, so that the conveyor belt part extends in the direction of travel of the mobile material processing device in the lowered position.

[0022] One conceivable variant can provide that the material processing unit is a screening unit, wherein the screening unit has at least one, preferably at least two, screening decks arranged one above the other, wherein the material screened through the at least one screening deck is conveyed by the screening unit directly or indirectly to the proximal end region of the conveyor belt. Here, for example, it can be provided that the material screened out by the screening unit is conveyed outward from the working area of the screening unit via a handover belt and to the proximal end region of the conveyor belt.

[0023] Here, it can also be provided that the screening unit has a drop-off area, wherein the drop-off area is connected at the upper side of the screening deck, wherein the drop-off area is guided directly or indirectly to the return belt, and the return belt has a drop-off end via which the conveyor belt material conveyed by the return belt is fed to the material processing unit, in particular to the crusher group. BRIEF DESCRIPTION OF DRAWINGS

[0024] The application is explained in more detail below on the basis of the embodiments shown in the drawings. The drawings show:

[0025] Figure 1 a perspective view of a material processing device,

[0026] Figure 2 a rear view of a material processing device according to Figure 1 ,

[0027] Figure 3 a view in a changed operating position according to Figure 2 ,

[0028] Figure 4 a detail from Figure 2 ,

[0029] Figure 5 a side view of a schematic representation of a pivoting mechanism in the working position, and

[0030] Figure 6 a schematic representation of a pivoting mechanism according to Figure 5 in the transport position. DETAILED DESCRIPTION

[0031] Figure 1 A material processing device 10 is shown having a material processing unit, which is currently formed in the form of a screening unit. The screening unit has a plurality of screening decks 11, which are arranged one above the other in a machine body 12. Here, the machine body 12 forms a screening housing of the screening unit. The screening decks 11 are arranged one above the other in the direction of gravity.

[0032] The machine body 12 has two side walls 13 parallel to each other, which are connected to each other by means of a rear wall 14. A vibration drive 15 is provided at the machine body 12. By means of the vibration drive 15 each screen deck 11 can be brought into vibration. As can be recognized from the figures: the screen decks 11 are inclined downward from right to left with respect to the horizontal line in the plane of the drawing. The screen decks 11 have different mesh widths. Here, the uppermost screen deck 11 forms the largest mesh width. The uppermost screen deck 11 merges in a drop-off area 11.1 in the direction of transport. The material delivered onto the upper screen deck 11 is screened at the screen deck 11. The material portion which does not fall through the screen deck 11 due to its size is fed to the drop-off area 11.1. The drop-off area 11.1 passes the material to a first handover belt 11.2. The first handover belt 11.2 receives the material from the drop-off area 11.1 and passes it to a return belt 30 transversely to the direction of transport of the drop-off area 11.1.

[0033] The return belt 30 has two lateral longitudinal struts 31, which extend in the direction of transport of the return belt 30. The longitudinal struts 31 are part of the load-bearing structure of the return belt 30. Rollers 32 are fixed at the load-bearing structure. A circulating endless conveyor belt (not shown) can roll at the rollers 32.

[0034] A funnel 34 of the return belt 30 is arranged below the first handover belt 11.2. The funnel 34 prevents that material from the first handover belt 11.2 falls laterally from the return belt 30.

[0035] The material starting from a receiving area 33 formed in the region of the funnel 34 is passed to a drop-off end 35 by means of a conveyor belt. A material processing unit, in particular a crushing unit, can be connected to the drop-off end 35. The material is received in the crushing device and crushed. The crushing unit can be a jaw crusher, a rotary impact crusher or another rock crusher.

[0036] As can be recognized from Figure 1 : the traction element 36 is fixed at the return belt 30 in the region of the drop-off end 35 by means of a fixing 36.2. The traction element 36 can be formed by a rope or a chain, for example. The traction element 36 carries a further fixing 36.1 at its end facing away from the drop-off end 35. By means of the fixing 36.1 the traction element 36 can be fixed at a machine member not shown. In this way, the return belt 30 is stabilized.

[0037] The screening unit has a further screen deck 11 below the upper screen deck 11, which is no longer recognizable in the view according to Figure 1 : the further screen deck is arranged in the machine body 12.

[0038] The sieve deck arranged below the upper sieve deck 11 has a screen opening width which is smaller than the screen opening width of the upper sieve deck 11. The material screened out by the sieve deck 11 reaches the fines belt 20. The fines belt 20 has a circulating transport belt which has its delivery area below the machine body 12. The screened-out material falls onto the delivery area and is transported by means of the fines belt 20 to the discharge end 22 of the fines belt 20. In order to avoid the material falling laterally from the fines belt 20, a cover 23 can be provided which covers the fines belt 20 behind the machine body 12.

[0039] The fines belt 20 has a carrier structure 21. The fines belt 20 is connected to the machine body 12 by means of the carrier structure 21. In order to drive the circulating transport belt, a drive 24 is provided in the region of the discharge end 22.

[0040] In order to secure the structural unit consisting of the screening unit and the fines belt 20 at the material processing unit, a coupling piece is provided. By means of the coupling piece, the structural unit can be screwed to the material processing unit. The material processing unit can here comprise the above-mentioned crusher group.

[0041] As described above, material is screened out of the upper sieve deck 11. The material falls onto the sieve deck 11 located therebelow. The part of the material which is not screened out by the sieve deck 11 located therebelow is conveyed by the screening unit onto the second handover belt 16. The conveying direction of the second handover belt 16 is here transverse to the conveying direction of the sieve deck 11. The screened-out material reaches the conveyor belt 40 via the second handover belt 16.

[0042] The structure of the conveyor belt 40 can be identified in more detail from Figure 2 As shown, the conveyor belt 40 can have substantially the same structure as the structure of the return belt 30.

[0043] Correspondingly, two struts 44.1 are used which extend in the longitudinal direction of the conveyor belt 40. The struts 44.1 are part of a carrier structure. The rollers 44.2 for the circulating conveyor belt 44.3 are secured at the carrier structure. The conveyor belt 40 has a proximal end region 41 of the supply end. The proximal end region is associated with the screening unit. The proximal end region forms a proximal end. At the opposite end, the conveyor belt 40 has a distal end region with a distal end 42.

[0044] The proximal end region 41 is formed by a base part 43. In contrast, the distal end region with its distal end 42 is formed by a conveyor belt part 44. An intermediate region of the conveyor belt 40 is formed between the proximal end region 41 and the distal end region. The intermediate region of the conveyor belt 40 is formed by the conveyor belt part 44.

[0045] The base part 43 is coupled to the conveyor belt part 44 via a pivot bearing 45. The conveyor belt part 44 can be pivoted relative to the base part 43 by means of the pivot bearing 45. Here, the pivot axis runs perpendicular to the conveying direction of the conveyor belt 44 and lies in a plane parallel to the plane of the drawing according to Figure 2

[0046] The base part 43 of the conveyor belt 40 has a laterally arranged holder 52. A stabilizing element 53 can be fixed at the holder 52. For this purpose, the stabilizing element 53 has a bearing 53.1 by means of which it can be pivotably coupled to the holder 52. At opposite ends, the stabilizing element 53 has a further bearing 53.2. By means of the further bearing 53.2, the stabilizing element 53 is pivotably coupled to the machine body 12.

[0047] For example, it is possible here to draw the following association: A vertical carrier 17 is fixed at the machine body 12. In order to mutually reinforce one another, two carriers 17 can be connected to one another by means of a cross strut 17.1. The stabilizing element 53 is fixed at one of the carriers 17. By means of the stabilizing element 53, the conveyor belt 40 can be relaxed in the operating position shown in Figure 2

[0048] As Figure 2 It is further shown that an adjustment mechanism 50 is provided. The adjustment mechanism 50 has a first link 51 and a second link 57. The first link 51 is pivotably coupled to the base part 43 by means of a first hinge 51.1. A second hinge 51.2 of the first link 51 is pivotably coupled to the machine body 12, for example to the carrier 17 currently coupled thereto.

[0049] The second link 57 is shown in dashed lines in Figure 1 and 2 The second link is pivotably coupled to the base part 43 of the conveyor belt 40 by means of a third hinge 57.1. A fourth hinge 57.2 connects the second link 57 with the machine body 12. For example, the fourth hinge 57.2 can here be provided at the carrier 17 coupled to the machine body 12.

[0050] As can be recognized from Figure 2 , the third hinge 57.1 is arranged closer to the proximal end of the conveyor belt 40 than the first hinge 51.1.

[0051] From Figure 2 ​​It is also identified that the first link 51 has a first lever length which extends from the first hinge 51.1 to the second hinge 51.2. The second link 57 has a second lever length which extends from the third hinge 57.1 to the fourth hinge 57.2. Here, the following correlation results: The first lever length is greater than the second lever. The first lever length is preferably at least twice as large as the second lever length. The ratio of the second lever length to the first lever length is particularly preferably selected in the range between 1 :2 and 1 :3; the ratio is preferably in the range between 1 :2.3 and 1 :2.7.

[0052] The hinge axes formed by the hinges 51.1, 51.2, 57.1, 57.2 are parallel to one another. In this way, a four-hinge system is formed about which the proximal end region 41 can be pivoted relative to the machine body 12.

[0053] It can be proposed within the scope of the application that the first link 51 and the second link 57 are each arranged on both sides of the conveyor belt 40. The links 51, 57 are preferably constructed identically for reasons of component outlay.

[0054] The hinges 51.1, 51.2, 57.1, 57.2 which are opposite one another of the links 51, 57 have hinge axes which are aligned with one another, so that a four-hinge system is obtained.

[0055] Figure 2 It is also shown that the first link 51 has a coupling piece 51.3. The force transmission 54 is fixed at the coupling piece 51.3 with a coupling point 54.1. The force transmission 54 is a flexible component, for example a rope or a chain.

[0056] The force transmission 54 is guided via a deflection device, for example a deflection roller. The deflection device is fixed at one of the carriers 17 in the region of the lateral strut 17.1. Following the deflection device, the force transmission 54 has a second coupling point 54.2. The coupling point 54.2 is connected to an actuating device 55. The actuating device 55 has an actuator 55.2 which can be constructed in the form of a hydraulic cylinder.

[0057] The hydraulic cylinder has a cylinder in which a piston is guided. A piston rod 55.1 is connected to the piston. The piston rod 55.1 is connected to the coupling point 54.2. The actuator 55.2 has a coupling element 55.3. By means of the coupling element, the actuator is connected to the machine body 12, preferably to the carrier 17.

[0058] In Figure 2In the position shown, the conveyor belt 40 is in a first working position which forms the basic position. In order to fix the basic position, the conveyor belt 40 has a stop 58. The stop 58 is supported in a form-fit manner at a counter stop 18.1 at the machine body 12, so that the distal end 42 cannot be lowered any further.

[0059] The basic position shown in Figure 2 , the conveyor belt 40 can be pivoted upwards against the direction of gravity, i.e. against the direction of the counter-gravity. For this purpose, the securing element 53 is first removed and then the actuator 55.2 is operated. The piston rod 55.1 is then pulled into the cylinder and the force transmission 54 is pulled. In this way, the force transmission 54 lifts the first link 51 at the coupling 51.3. Here, the adjustment mechanism performs Figure 5 and Figure 6 the pivoting movement shown.

[0060] As can be recognized from Figure 5 and Figure 6 , in the pivoting movement, the proximal end of the conveyor belt 40 is guided out of the basic position shown in Figure 5 from below the machine body 12 in a direction lateral to the machine body 12, wherein the proximal end is formed by the end section of the proximal end region 41 which protrudes beyond the first hinge 57.1. Here, the pivoting movement is such that the proximal end is guided onto an arcuate track and does not descend there or only slightly. In this way, it is prevented that the proximal end of the conveyor belt 40 collides with the area below it, for example the ground.

[0061] In Figure 6 , the conveyor belt 40 is in the upwardly pivoted transport position. This position is also shown in Figure 3 . The pivoting movement is limited by means of the stop 58 which bears against the machine body-side stop 18.2 in a form-fit manner.

[0062] When the conveyor belt 40 is in the upwardly pivoted transport position, the conveyor belt portion 44 can be lowered about the pivot bearing 45 relative to the base part 43. Here, the conveyor belt portion 44 is then lowered along the direction of gravity until it bears laterally against the machine body 12. In this way, a compact configuration is achieved in the transport position.

[0063] The conveyor belt 40 can not only be arranged in the basic position shown in Figure 2 . Rather, the base part 43 of the conveyor belt 40 can also be pivoted to the basic position shown in Figure 2 and according to Figure 3In any intermediate position between the upward-flipped positions. To this end, actuator 55.2 is operated and piston rod 55.1 is pulled in until the desired pivot position of conveyor belt 40 is reached. For example, this pivot position can be secured by means of stabilizing element 53, thereby releasing actuator 55.2. For this purpose, tensioning device 53.3 can be used in particular, by means of which the length of telescopic stabilizing element 53 between the two bearings 53.1, 53.2 can be steplessly set.

[0064] like Figure 2 , 5 As shown in Figure 6, the stop 18.1 and / or stop 18.2 may be formed from the support 56. For example, the support 56 may be formed from a metal sheet coupled to the machine body 12.

[0065] First working position (according to) Figure 2 In the machine body 12, a portion of the load on the conveyor belt 40 can be transferred via the support 56.

[0066] For example, stop 18.2 can be used to: securely support conveyor belt 40 on Figure 6 The transportation location is shown.

Claims

1. A material processing apparatus (10) having a conveyor (40) for conveying material to or from a material processing unit, wherein, The conveyor belt (40) has a proximal end region (41) of a supply end and a distal end region (42) of a delivery side, wherein an intermediate region of the conveyor belt (40) is arranged between the proximal end region (41) and the distal end region (42) of the conveyor belt (40), wherein the conveyor belt (40) is pivotably articulated at a proximal end region (41) of the conveyor belt by means of a hinge connection to a machine body (12), and wherein the conveyor belt (40) can be adjusted from a lowered working position to an upwardly raised transport position by means of an adjustment unit (55) and the hinge connection, characterized in that the hinge connection is part of an adjustment mechanism (50) operated by the adjustment unit (55), which guides a proximal free end of the proximal end region (41) of the conveyor belt (40) during pivoting from the lowered working position to the upwardly raised transport position such that the conveyor belt (40) is pivoted at a proximal end of the conveyor belt and raised against the direction of gravity, the proximal end being an end of the proximal end region, and the adjustment mechanism (50) has a first link (51) and a second link (57), the first link (51) being pivotably coupled to the proximal end region (41) of the conveyor belt (40) by means of a first hinge (51.1) and to the machine body (12) of the material processing device (10) by means of a second hinge (51.2), the second link (57) being pivotably coupled to the proximal end region (41) of the conveyor belt (40) by means of a third hinge (57.1) and to the machine body (12) of the material processing device (10) by means of a fourth hinge (57.2), and the first hinge (51.1) and the third hinge (57.1) are spaced apart from the proximal end at different distances.

2. The material processing device (10) according to claim 1, characterized in that The proximal end of the conveyor belt (40) is arranged below the machine body (12) of the material processing device (10) in the working position such that a delivery region of a material conveyor of the material processing device (10) ends above the proximal end region (41) of the conveyor belt (40) against the direction of gravity, and in the transport position the proximal end of the conveyor belt (40) is laterally and horizontally spaced apart from the delivery region of the material conveyor.

3. The material processing device (10) according to claim 1, characterized in that The first link (51) has a first lever length between the first hinge (51.1) and the second hinge (51.2), and the second link (57) has a second lever length between the third hinge (57.1) and the fourth hinge (57.2), and the lever lengths differ from one another, wherein the ratio of the second lever length to the first lever length is selected to be 1:2 to 1:

3.

4. The material processing apparatus (10) of claim 1, wherein, At least one of the links of the adjustment mechanism (50) has a coupling (51.3) to which a force transmission (54) of the adjustment unit (55) is coupled.

5. The material processing device (10) according to claim 4, characterized in that The force transmission (54) is a traction mechanism which is coupled to an actuator (55.2) of the adjustment unit (55), or the actuator (55.2) is pivotably coupled to one of the links.

6. The material processing device (10) according to claim 1 or 2, characterized in that At the proximal end region (41) of the conveyor belt (40) a holder (52) is provided, to which a stabilizing element (53) is connected by means of a first bearing (53.1), and the stabilizing element (53) has a second bearing (53.2) by means of which the stabilizing element (53) is fixed to a carrier (17) of the material processing device (10) in the working position and / or in the transport position of the conveyor belt (40).

7. The material processing device (10) according to claim 1 or 2, characterized in that At one of the links a stop (58) is provided which in the working position and / or in the transport position abuts against a counter stop of the material processing device (10).

8. The material processing apparatus (10) of claim 1, wherein, A first link (51) and a second link (57) are provided on both sides of the proximal end region which extend from the proximal end to a distal end, wherein the distal end is the end of the distal end region, wherein the hinges of the links are aligned with one another in pairs to form a common pivot axis.

9. The material processing apparatus (10) according to claim 1 or 2, characterized in that The conveyor belt (40) has a base part (43) which forms the proximal end region (41), a conveyor belt part (44) is connected to the base part (43) by means of a pivot bearing (45), and the conveyor belt part (44) can be pivoted relative to the base part (43) by means of the pivot bearing (45).

10. The material processing apparatus (10) according to claim 1 or 2, characterized in that The material processing unit is a screening unit, wherein the screening unit has at least one screen deck (11), wherein the material screened by the at least one screen deck (11) is conveyed by the screening unit directly or indirectly to the proximal end region (41) of the conveyor belt (40).

11. The material processing apparatus (10) of claim 10, wherein, The screening unit has a drop-off region (11.1), wherein the drop-off region (11.1) is connected at an upper side of the screen deck (11), wherein the drop-off region (11.1) is guided directly or indirectly to a return belt (30), and the return belt (30) has a drop-off end (35) of the return belt, via which the conveyor belt material conveyed by the return belt (30) can be fed to a material processing unit.

12. The material processing apparatus (10) of claim 10, wherein, The screening unit has a fines belt (20), wherein the fines belt (20) is arranged below the screen deck (11) and receives the screened fines fraction below the screen deck and transports the fines fraction to a drop-off end (22) of the fines belt.

13. The material processing apparatus (10) of claim 1, wherein, The material processing device is a mobile mineral processing device.

14. The material processing apparatus (10) of claim 3, wherein, The first link (51) has a longer lever length than the second link (57), the third hinge (57.1) of the second link (57) being coupled closer to the proximal end of the conveyor belt (40) than the first hinge (51.1) of the first link.

15. The material processing apparatus (10) of claim 3, wherein, The ratio of the second lever length to the first lever length is selected to be 1:2.3 to 1:2.

7.

16. The material processing apparatus (10) of claim 5, wherein, The force transmission mechanism is a flexible member.

17. The material processing apparatus (10) of claim 5, wherein, The actuator (55.2) is a motorized or hydraulic unit.

18. The material processing apparatus (10) of claim 5, wherein, The actuator (55.2) is a hydraulic cylinder.

19. The material processing apparatus (10) of claim 5, wherein, The actuator (55.2) is a linear actuator.

20. The material processing apparatus (10) of claim 8, wherein, The pivot axis extends perpendicular to the conveying direction of the conveyor belt (40).

21. The material processing apparatus (10) of claim 10, wherein, The screening unit has at least two screen decks (11) arranged one above the other.

22. The material processing apparatus (10) of claim 11, wherein, The material processing unit is a crusher group.

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