Screening assembly for mobile bulk material processing plant

Abstract

The present disclosure provides a screening assembly for a mobile bulk material processing plant (100) that is capable of adjusting its position relative to the base frame (102) of the mobile bulk material processing plant in order to facilitate the transfer of material from a screen (120) onto a processing unit, such as a crusher, by optimizing the height and operating angle of the screening assembly. The screening assembly disclosed thereby is also capable of folding into a compact arrangement that complies with transport regulations while being convenient and safe for the operator. The screening assembly comprises a base frame (102) and at least two link elements (107, 111) that are coupled at a pivotable joint such that when in an operating position, the two link elements are configured to adjust the height and the angle of inclination of a screen box (3) in order to facilitate the transfer of material from the screen to the crusher.

Description

Technical Field

[0001] This disclosure relates to a mobile bulk material handling apparatus, and more particularly, but not exclusively, to a screening assembly removably attached to the mobile bulk material handling apparatus. More specifically, this disclosure relates to a screening assembly capable of adjusting its position, particularly its height and inclination relative to the base frame of the mobile bulk material handling apparatus. Background Technology

[0002] Mobile bulk material handling equipment has been developed for a wide variety of applications, including processing stone, minerals, building materials, and domestic and industrial waste to produce smaller and / or size-separated aggregates for subsequent processing, use, or disposal. For example, in quarry or cleanup site environments, mobile crushers are used to break stone, gravel, or cleanup materials into smaller pieces. Many of these devices use screening machines to sort aggregates according to their size. Sorting can be achieved by vibrating the screen, which causes particles that are too small to pass through openings on the screen surface, while particles that are too large remain above the screen surface. During operation, the screening machine sometimes needs to be tilted and / or raised to facilitate the transfer of material from the screen surface to the material handling unit, such as a crusher. This adjustment of the screen operating angle has been achieved in the past using several technologies. In some equipment, fixed inclined screens are constructed such that the screen surface is sloped, typically at the discharge end, to aid in the movement of material to the material crushing unit by allowing the material to slide off the edges of the screen. Furthermore, it is necessary to maintain the sieve at a horizontal or near-horizontal orientation during transportation to comply with transportation regulations, especially those restricting vehicle height on roads. A horizontal orientation is also advantageous during maintenance operations, as it makes it easier for the operator to change the screening medium when the sieve is horizontal. To achieve various sieve slope positions (including horizontal positions) for operation, sieve lifting mechanisms have been developed. Patent documents US20130037454A1 and US20190160492A1 disclose mechanisms for using sieves at variable operating angles. However, no prior art document discloses a mechanism for changing both the height and inclination of the screening assembly. Moreover, most position adjustment mechanisms utilize a single pivotable joint to change the sieve's position. If such a mechanism were also used to change the sieve's height, it would require increasing the length of the equipment's base frame, leading to transportation problems and increasing the cost and weight of the equipment.

[0003] Therefore, there is a need for a screening assembly that is compact, simple in design, easy to use, and capable of adjusting both its height and tilt angle to facilitate the transfer of material from the sieve to the material processing unit. Summary of the Invention

[0004] Some of the objectives of this disclosure are satisfied by at least one embodiment herein, as follows:

[0005] The purpose of this disclosure is to improve one or more of the shortcomings of the prior art, or at least to provide a useful alternative.

[0006] More specifically, one object of this disclosure is to provide a position adjustment mechanism for a screening component of a mobile bulk material handling unit to achieve optimal height and tilt angle, thereby facilitating the feeding of material to a handling unit such as a crusher.

[0007] Another object of this disclosure is to provide a position adjustment mechanism for a screening assembly to allow the screening assembly to be lowered to a basic horizontal orientation during transport, thereby complying with transport regulations that limit the height of vehicles on the road.

[0008] Another object of this disclosure is to provide a simple, easy-to-use and easy-to-install mechanism for adjusting the position of the screening components relative to the base frame or chassis of the equipment.

[0009] Another object of this disclosure is to provide a compact screening assembly that can be folded and unfolded without increasing the length of the base frame.

[0010] Another object of this disclosure is to provide a screening assembly with improved safety standards during transport and operation.

[0011] Other objects and advantages of this disclosure will become more apparent from the following description, which is not intended to limit the scope of this disclosure.

[0012] The aforementioned objectives are achieved by this disclosure, which provides a screening assembly that can be positioned relative to the base frame of a mobile bulk material handling device to facilitate the transfer of material from a screen to a material handling unit, such as a crusher, by optimizing the height and operating angle of the screening assembly. Furthermore, the disclosed screening assembly can be folded into a compact arrangement that complies with transport regulations restricting vehicle height, while also providing convenience and safety for the operator.

[0013] According to a first aspect of this disclosure, a mobile screening assembly is provided that supports a screen box for a mobile bulk material handling equipment. This assembly has a base frame and at least two connecting elements connected at a pivot joint, such that when the assembly is in an extended position (as an operating mode), the connecting elements are configured to change the height and tilt angle of the screen box to facilitate the transfer of material from the screen box to a material handling unit. More particularly, a mobile screening assembly for a mobile bulk material handling equipment is provided, the assembly comprising: a base frame having a front end, a rear end, a lower surface, and an upper surface; a first connecting element having a front end and a rear end, the first connecting element being movably connected to the base frame via a first attachment device arranged with the base frame to allow a first tilt angle to be set between the base frame and the first connecting element, wherein a second connecting element is movably arranged with the first connecting element via a second attachment device arranged with the first connecting element to allow a second tilt angle to be set between the upper surface of the first connecting element and the lower surface of the second connecting element.

[0014] Advantageously, when the mobile screening assembly is deployed or in operation, it allows for easy adjustment of the screen's position relative to the base frame to facilitate the transfer of material from the screen to a crusher or any other material handling unit placed on the base frame. Depending on operational requirements, the position adjustment can be related to the screen's height, its tilt angle, or both.

[0015] Preferably, the screen box is supported on the upper surface of the second connecting element, such that the screen box moves according to the movement of the second connecting element, and the position of the screen relative to the base frame changes according to the position of the second connecting element. The second connecting element may be in the form of a frame, including a pair of parallel elongated members and a pair of crossbars connecting the two elongated members. Optionally, at least one pair of support structures may be provided, which are attached to the upper portion of the second connecting element to provide support to the screen box.

[0016] Preferably, the first attachment device between the first connecting element and the base frame is in the form of a pivot joint. Preferably, the second attachment device between the first connecting element and the second connecting element is also in the form of a pivot joint. Advantageously, due to the operation of the two pivot joints, the movable screening assembly can adjust both the lifting and tilting angles. The pivot joints also provide the operator with operational convenience and flexibility, allowing the operator to select and position the screen at a wide range of operating angles and heights as needed.

[0017] Furthermore, the arrangement is compact (especially when folded) and occupies less space than any screening component in the prior art. This feature is useful when the component is to be transported on the road, as it complies with transportation regulations that limit vehicle height.

[0018] Optionally, the mobile screening assembly includes an actuation device that enables the first and second connecting elements to move vertically. The actuation device can be in the form of a hydraulic cylinder or an external lifting auxiliary device (such as a crane). Preferably, the actuation device includes a pair of extendable and retractable first hydraulic cylinders attached to a base frame, configured to allow the first connecting element to swing away from the base frame while remaining attached to the first attachment device. Preferably, another pair of extendable and retractable hydraulic cylinders, hereinafter referred to as second hydraulic cylinders, is also provided. These cylinders are attached to the first connecting element and configured to allow the second connecting element to swing away from the first connecting element while remaining mechanically connected to the first connecting element at the second attachment device. Advantageously, hydraulic cylinders provide operational convenience that cannot be provided by using external lifting auxiliary devices such as cranes. Using hydraulic cylinders is also safer than using other lifting devices. Furthermore, using hydraulic cylinders as the actuation device reduces setup time.

[0019] Preferably, the mobile screening assembly also includes a vertical rear support structure located at the rear end of the base frame, extending upward from the base frame to the rear end of the second connecting element when the assembly is in operating mode. Advantageously, the vertical rear support structure holds the screening assembly in an elevated or tilted position. This helps reduce the load on the actuator (especially the hydraulic cylinder) and provides stronger support for the assembly in a fixed tilted position. The vertical rear support structure may include a pair of elongated members connected by at least one crossbar. Similarly, the mobile screening assembly may also include a vertical front support structure for reducing the load on the actuator (especially the hydraulic cylinder). The vertical front support structure may be in the form of a frame with two elongated vertical parallel members connected by at least one crossbar in the middle. Preferably, when the screening assembly is in operating mode, the vertical front support structure is located at the front end of the base frame, extending upward from the base frame to the second connecting element.

[0020] Preferably, the movable screening assembly further includes a locking system located at the front end of the first linking element. The advantage of having a locking system is that it keeps the screening assembly stationary in tilted or raised positions. The locking system may include at least a pair of parallel plates located at the front end of the first linking element and includes a locking pin, each plate having an orifice, the locking pin passing through the second linking element such that the first and second linking elements are secured together, thereby keeping the assembly stationary in tilted or raised positions.

[0021] Preferably, the first linking element has a triangular front end, such that one corner of the triangle is attached to the first pivot joint, and another corner accommodates the locking system. The third corner of the triangle extends horizontally into the elongated member of the first linking element. Preferably, a triangular opening is also cut within the front end of the first linking element. Advantageously, this design provides structural strength to the first linking element. Furthermore, multiple holes can be formed below the locking system to allow the assembly to be secured in different operating positions.

[0022] According to another aspect of this disclosure, a mobile bulk material handling apparatus is provided, comprising: a handling unit, such as a crusher; a screening assembly including a screen box, the screening assembly being adjustable in position relative to a base frame of the apparatus to facilitate material delivery to the handling unit; a feed chute mechanically attached to the screen box; and at least one conveyor for transporting material to or from the handling unit.

[0023] Preferably, the mobile bulk material handling equipment further includes at least one pair of support structures attached to the lower portion of the base frame. Preferably, it may also include a propulsion device, such as wheels or tracks disposed at the lower portion of the base frame, to enable the equipment to be transported.

[0024] According to another aspect of this disclosure, a method for adjusting the position of a screen box installed on a mobile bulk material handling device is provided, comprising the following steps:

[0025] - A movable screening assembly is provided, which can be adjusted in position relative to the equipment's base frame.

[0026] - An actuation device, preferably a pair of hydraulic cylinders, is used to raise the second linkage element to achieve the required tilt angle of the screen box.

[0027] - A pair of hydraulic cylinders are used to raise the first connecting element, enabling the screen box to reach the height required for material to flow into the processing unit.

[0028] - The screening assembly is supported on a vertical rear support structure and a vertical front support structure.

[0029] -During the duration of the operation, use a locking system to lock the position of the raised first link element.

[0030] - When the device is not in operation, lower the first and second linking elements and fold them onto the base frame.

[0031] The above method utilizes a movable screening assembly in which the front end of the first linking element is connected to the front end of the base frame via a movable connection (preferably a pivotable joint), and the rear end of the first linking element is connected to the rear end of the second linking element via a movable connector (preferably a pivotable joint).

[0032] Advantageously, this method makes the operation of the screening components simple and quick. Furthermore, it is safe for operators because it minimizes the use of cranes and other external lifting equipment during operation.

[0033] The mobile screening assembly described in this disclosure is suitable for use with different types of crushers, such as cone crushers, vertical shaft impact crushers, horizontal shaft impact crushers, or any other type of material handling unit. This screening assembly is suitable for use with handling units of varying sizes. Another advantage of this assembly is that, once the setup is standardized, it allows for minimal chute variation, resulting in reduced inventory and flexible production. Compared to other similar arrangements, this assembly is also compact and requires less space to operate in both raised and lower orientations. Another advantage provided by this disclosure is improved safety during operation (expanded position) and transport (folded position). Attached Figure Description

[0034] Specific embodiments of this disclosure will now be described by way of example only and with reference to the accompanying drawings, in which:

[0035] Figure 1 This is a perspective view of a mobile screening assembly according to one of the preferred embodiments of the present disclosure.

[0036] Figure 2 This is a side view of the lifting mechanism of a movable screening assembly (without a sieve) in an ascending orientation according to one of the preferred embodiments of the present disclosure.

[0037] Figure 3 This is a perspective view of the lifting mechanism of a screening assembly (without a sieve) in an ascending orientation according to one of the preferred embodiments of the present disclosure.

[0038] Figures 4a-4c Different steps in the operation of a screening component according to one of the preferred embodiments of this disclosure are shown. Figure 4a A side view of the component in a horizontal orientation is shown, with the link folded up. Figure 4b A side view of the component in its central position is shown, with the second linking element raised. Figure 4c A side view of the component is shown in an elevated and tilted operating position, with both the first and second linking elements raised.

[0039] Figure 5a This is a perspective view highlighting the screening components of the locking system. Figure 5b This is an enlarged view of a locking system according to one of the preferred embodiments of the present disclosure. Detailed Implementation

[0040] Embodiments of the present disclosure will now be described with reference to the accompanying drawings. Embodiments are provided to fully and completely convey the scope of the disclosure to those skilled in the art. Numerous details relating to specific components and methods are set forth to provide a complete understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that the details provided in the embodiments should not be construed as limiting the scope of the disclosure.

[0041] refer to Figure 1 The mobile screening assembly 100 includes a base frame 102 providing central support for the various operating components of the assembly 100. The frame 102 is movably mounted on a front support structure 301 and a rear support structure 302, and also has at least a pair of wheels 303 on its lower surface 105, which are driven by a suitable power unit (not shown) to propel the assembly 100 across the ground. The frame 102 includes a pair of parallel and longitudinally extending frame members extending from a front end 130 to a rear end 104. Each frame member is spaced apart between the ends 130, 104 in a width direction perpendicular to the main length. The assembly 100 is shown carrying a screen box 101 with at least one vibrating screen 12, such that the screen is positioned to facilitate the transfer of material into a feed chute 501, which further feeds the material into a material processing unit 206, which is shown as a crusher in the figure as an example. Component 100 is configured to adjust the position of screen box 101 relative to base frame 102 to achieve an optimal position for transferring material into material processing unit 206. The position adjustment mechanism of component 100 includes two pairs of linking elements (hereinafter referred to as first linking element 107 and second linking element 111) attached at two pivot points (hereinafter referred to as first pivot 103 and second pivot 116) to allow screen box 101 to move vertically and angularly relative to base frame 102. First linking element 107 includes a pair of parallel longitudinally extending members, each member having a front end 108 and a rear end 109. The front end 108 of first linking element 107 is triangular in shape and also has a triangular aperture 404 at its center, as shown in... Figure 5bAs can be seen from the text.

[0042] When in such a situation Figure 4a In the folded or transported position shown, the first connecting element 107 rests on top of the base frame 102, such that the lower surface of the first connecting element 107 is in physical contact with the upper surface 106 of the base frame 102. For example... Figure 1 As shown, a pair of first hydraulic cylinders 204 are attached to the upper surface 106 of the base frame 102. When the assembly 100 is in the folded position, the hydraulic cylinders 204 remain retracted, but when the assembly 100 is in the unfolded or operational position, the hydraulic cylinders 204 extend to move the first connecting element 107 vertically away from the base frame 102, thereby forming a first tilt angle (α) between the first connecting element 107 and the base frame 102. The first connecting element 107 is movably attached to the base frame 102 at a first pivot point 103 by means of a pivotable connection. Therefore, the element 107 can be raised at point 103 and form the first tilt angle (α) relative to the base frame 102. When raised, the assembly 100 can be held in any desired position using a vertical support structure 200, which is detachably mounted at the rear end 104 of the base frame 102. The structure 200 includes a pair of vertical parallel members spaced apart in the width direction. There is also a pair of parallel horizontal beams 207, which connect the two vertical parallel members of structure 200.

[0043] refer to Figure 2 and 3 The second linking element 111 includes a front end 114 and a rear end 115. Element 111 has a pair of elongated parallel members extending from the front end 114 to the rear end 115, spaced apart in the width direction. Element 111 has sieve supports 119 at its four corners to hold the sieve box 101 at its upper surface 112. A pair of horizontal parallel members 118 are also provided on both the front end 114 and the rear end 115 of element 111. The second linking element 111 has a fixing member at the front end 114, which remains parallel to the base frame 102 at all times. This member provides structural stability to the second linking element 111. When assembly 100 is in the operating position (e.g.... Figure 5b As shown, it also provides a position on the second connecting element 111 for inserting the locking pin into the elements 107 and 111 and securing the elements 107 and 111 together. A pair of second hydraulic cylinders 205 are provided on the lower surface 113 of element 111. When the assembly 100 is in the folded or transport position, the second hydraulic cylinders 205 remain in the retracted state. When it is necessary to raise the second connecting element 111, the cylinders 205 open. With the aid of the front support structure 202, the raised second connecting element 111 can be supported and held in a fixed position.

[0044] The front support structure 202 is positioned near the first pivot 103 at the base frame 102 and includes a pair of vertically parallel members spaced apart in the width direction, as well as a horizontal beam 203 to provide structural stability. A second linking element 111 is movably connected to the first linking element 107 at pivot point 116, thereby forming a second tilt angle (β) between the upper surface of the first linking element 107 and the lower surface 113 of the second linking element 111. The rear end 115 of the second linking element 111 is connected to the rear end 109 of the first linking element 107 at pivot point 116.

[0045] refer to Figure 4a , Figure 4b and Figure 4c The diagram illustrates the three operational stages of component 100. Figure 4a In this configuration, component 100 is in an unfolded or transportable position. In this position, the connecting elements 107 and 111 of component 100 achieve a horizontal orientation for use during transport of component 100 to comply with regulations restricting vehicle height on roads. Component 100 becomes compact in this folded position, facilitating transport from one work site to another. Figure 4a As shown, in this position, both the first connecting element 107 and the second connecting element 111 are folded up, such that the lower surface of the first connecting element 107 is in physical contact with the upper surface 106 of the base frame 102. Furthermore, the second connecting element 111 is also completely horizontal in orientation to ensure the compactness of the assembly 100. At this stage, the vertical support structure 200 is not employed and remains uninstalled for separate transport.

[0046] exist Figure 4b The diagram illustrates the intermediate position of component 100. The first linking element 107 remains horizontal and rests on the upper surface 106 of the base frame 102. By moving the pivot point 116, the second linking element 111 rises at a desired operating angle, causing element 111 to rise vertically away from the base frame 102, thereby creating a second tilt angle (β) between the first linking element 107 and the second linking element 111. Figure 1 The hydraulic cylinder 205 shown provides the thrust required for the element 111 to rise.

[0047] exist Figure 4cThe diagram shows the operating or deployed position of component 100. The first connecting element 107 is raised by means of a first hydraulic cylinder 204 (not shown), creating a first tilt angle (α) between the base frame 102 and the first connecting element 107 at pivot point 103, thereby causing element 107 to be raised vertically away from the base frame 102. As a result of this movement, the screen box 101 (as shown in the diagram) supported on the upper surface 112 of the second connecting element 111... Figure 1 The screen box 101 (as shown) is raised and tilted at a desired operating angle so that material can be transferred from the screen 120 through the feed chute 501 into the material processing unit 206. Therefore, assembly 100 is configured to adjust the position of the screen box 101 according to operational needs by changing the raising and tilting angle of the second linking element 111. Once assembly 100 is in the raised and tilted position (as shown), Figure 4c As shown in the operating position), the vertical support structure 200 can be installed at the rear end 104 of the base frame 102 to reduce the load on the hydraulic cylinders 204 and 205 (e.g., in the operating position shown). Figure 1 As shown, the second link element 111's rear end 115 is supported by the front support structure 202, which helps to reduce the load on the hydraulic cylinders 204, 205 (as shown). Figure 1 (As shown). In the operating position, component 100 can also be locked using locking system 400 to limit further movement of component 100. After operation, component 100 can be folded back to its original position by removing vertical support structure 200 and retracting hydraulic cylinders 204, 205 (not shown). Figure 4a The transportation location is shown.

[0048] refer to Figure 5a and 5b The diagram illustrates the locking system 400. For example... Figure 5a As shown, the locking system is located near the front end of the first link element 107 and the front end of the second link element 111. Figure 5b An enlarged view of the locking system 400 is provided. The locking system 400 includes a pin 403 that can be inserted into an aperture 402 located on a parallel plate 401 of the first linking element 107, such that the pin 403 passes through a second linking element 111 to mechanically connect the first linking element 107 and the second linking element 111. The pin 403 can be removably inserted into the aperture 402 to secure the locking element. Depending on the required tilt angle, the pin 403 can be inserted into any of the apertures 402a, 402b, 402c, 402d, and 402e present on the plate 401 at the front end 108 of the first linking element 107 to secure the locking element and fix the assembly 100 at a selected tilt angle. When the assembly is in a folded / transport position or an intermediate position, the pin 403 remains disengaged.

[0049] The following steps provide a method for adjusting the position of a screen box 101 installed on a mobile bulk material handling device to facilitate the transfer of material from the screen to the material handling unit 206.

[0050] a) Provide the screening components 100 as described above.

[0051] b) Using a pair of second hydraulic cylinders 205, the second linking element 111 is raised to a predetermined angle (β).

[0052] c) Using a pair of first hydraulic cylinders 204, the first connecting element 107 is raised to a predetermined angle (α) so that the screen box 101 can reach the height required for material to flow into the processing unit 206.

[0053] d) Support the screening assembly 100 on the vertical rear support structure 200 and the vertical front support structure 202.

[0054] e) During the duration of the operation, the position of the raised first link element 107 is locked using the locking system 400.

[0055] f) When the device 100 is in transport mode, lower the first link element 107 and the second link element 111 and fold them onto the base frame 102.

[0056] The foregoing description of the embodiments is provided for illustrative purposes and is not intended to limit the scope of this disclosure.

Claims

1. A mobile screening assembly (100) supporting a screen box (101) for mobile bulk material handling equipment, the mobile screening assembly comprising: Crusher (206); A base frame (102) having a front end (130), a rear end (104), a lower surface (105) and an upper surface (106); A first linking element (107) having a first linking element front end (108) and a first linking element rear end (109), the first linking element (107) having the front end (108) being movably connected to the base frame (102) via a first attachment device (103) arranged together with the base frame (102) to allow a first tilt angle (α) to be set between the base frame (102) and the first linking element (107); The second linking element (111) has a second linking element front end (114) and a second linking element rear end (115) disposed at the crusher (206). The second linking element (111) is movably arranged together with the first linking element (107) via a second attachment device (116) arranged together with the first linking element (107) to allow a second tilt angle (β) to be set between the upper surface of the first linking element (107) and the lower surface (113) of the second linking element (111) for raising the second linking element front end (114) relative to the crusher (206).

2. The mobile screening assembly (100) according to claim 1, wherein, The second linking element (111) also includes at least one pair of sieve support structures (119) attached to its upper surface (112).

3. The mobile screening assembly (100) according to claim 1 or claim 2, wherein the second linking element (111) is configured to carry the screen box (101) on its upper surface (112).

4. The mobile screening assembly (100) according to any one of claims 1-2, wherein, The first attachment device (103) between the first linking element (107) and the base frame (102) is a pivot joint.

5. The mobile screening assembly (100) according to any one of claims 1-2, wherein, The second attachment device (116) between the first linking element (107) and the second linking element (111) is a pivot joint.

6. The mobile screening assembly (100) according to any one of claims 1-2, wherein, The second linking element (111) includes a pair of parallel elongating members (117), the respective front and rear ends of which are connected by a pair of horizontal parallel members (118).

7. The mobile screening assembly (100) according to any one of claims 1-2, wherein, The mobile screening assembly (100) includes a vertical rear support structure (200) located at the rear end (104) of the base frame (102), which extends upward from the base frame (102) to the rear end (115) of the second linking element (111) when the mobile screening assembly (100) is in operation mode.

8. The mobile screening assembly (100) according to any one of claims 1-2, wherein, The mobile screening assembly (100) includes a vertical front support structure (202) located on the base frame (102) near the first attachment device (103), which extends upward from the base frame (102) to the second linking element (111) when the mobile screening assembly (100) is in operation mode.

9. The mobile screening assembly (100) according to any one of claims 1-2, wherein, The mobile screening assembly (100) also includes an actuation device that enables the first linking element (107) and the second linking element (111) to move vertically between a transport mode and an operating mode.

10. The mobile screening assembly (100) of claim 9, wherein the actuation device includes at least one pair of extendable and retractable first hydraulic cylinders (204) attached to the base frame (102), the first hydraulic cylinders being configured to cause the first linking element (107) to swing away from the base frame (102) while remaining attached to the first attachment device (103).

11. The mobile screening assembly (100) of claim 10, wherein the actuation device further comprises at least one pair of extendable and retractable second hydraulic cylinders (205), the second hydraulic cylinders (205) being attached to the first linking element (107), the second hydraulic cylinders being configured to cause the second linking element (111) to swing away from the first linking element (107) while being mechanically coupled to the first linking element (107) at the second attachment device (116).

12. The mobile screening assembly (100) according to any one of claims 1-2, wherein, The mobile screening assembly (100) includes a locking system (400) for securing the mobile screening assembly (100) when it is in an operating mode.

13. The mobile screening assembly (100) according to claim 12, wherein the locking system (400) includes at least a pair of parallel plates (401) and locking pins (403) of the first linking element (107), each plate (401) having an opening (402), the locking pins (403) passing through the second linking element (111) such that the first linking element (107) and the second linking element (111) are secured together by the locking pins (403).

14. A mobile bulk material handling unit, comprising: The mobile screening assembly (100) according to any one of claims 1-13, A feed chute (501), said feed chute (501) being mechanically attached to one end of said screen box (101), and At least one conveyor (503) for transporting materials to the processing unit (502) or removing materials from the crusher (206).

15. A method for adjusting the position of a sieve box (101) installed on a mobile bulk material handling unit, the method comprising the steps of: g) Providing a mobile screening assembly (100) as claimed in any one of claims 1-13, wherein the mobile screening assembly (100) includes a locking system (400) for securing the mobile screening assembly (100) when it is in an operating mode. h) Using a pair of second hydraulic cylinders (205), the second linking element (111) is raised to a predetermined angle (β). i) Using a pair of first hydraulic cylinders (204), the first connecting element (107) is raised to a predetermined angle (α) so that the screen box (101) can reach the height required for material to flow into the crusher (206). j) During the duration of the operation, the locking system (400) is used to lock the position of the raised first link element (107), and k) When the mobile screening assembly (100) is in transport mode, lower the first linking element (107) and the second linking element (111) and fold the first linking element (107) and the second linking element (111) onto the base frame (102).

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