Material screening device

Abstract

The present invention discloses a material screening device, comprising a device body, a sliding door and a screening device, wherein a feed port is provided at the top of the device body, the interior of the device body is a hollow structure, and at least one screening mechanism is provided inside the device body, and the screening mechanism evenly divides the interior of the device body into at least two screening bins; the top and bottom of the device body are located at the front side of the device body and are respectively provided with slide rails that are grooved with each other, a sliding door is installed inside the slide rail, a discharge port corresponding to the screening bin is provided on one side of the sliding door, and a discharge hopper is provided at the bottom of the discharge port outside the sliding door; a screening device is provided on one side of the device body, and a transmission mechanism is connected to one side of the screening device, and one end of the transmission mechanism passes through the device body and is fixedly connected to a fixed frame. The present invention can replace the screen and change the number of screens according to people's needs, thereby improving the efficiency of the material screening process.

Description

Technical Field

[0001] The invention relates to the field of material screening, in particular to a material screening device. Background Art

[0002] Material screening is a device that sorts materials according to their particle size. It is widely used in all walks of life to screen and classify different materials according to their different particle sizes to facilitate people's later storage and sale of materials.

[0003] However, the existing material screening devices mostly use single-piece fixed screening. Some factories that have higher requirements for screening speed use mechanical kinetic energy screening methods, which are mainly represented by rotary screening machines and vibrating screening machines. However, the discharging and feeding of the rotary screening machine cannot be carried out at the same time during the screening process. Although the screening speed is increased, the feeding and discharging speeds are reduced. Although the vibrating screening machine can feed and discharge materials at the same time through mechanical vibration, the mechanical vibration during the screening process causes wear on the screening device, and its structure is complex and easily damaged, which is inconvenient for workers to use.

[0004] Therefore, how to design a material screening device has become our current problem to be solved. Summary of the invention

[0005] The present invention is aimed at the above-mentioned deficiencies in the prior art and provides a material screening device, which solves the problem that the traditional rotary screening machine cannot feed and discharge materials at the same time and the problem that the vibration screening machine has a complex structure and causes certain damage to the screening device body. Thus, the material screening process can achieve simultaneous feeding and discharging, and the regular screening kinetic energy in the horizontal direction can reduce the loss of the device itself and extend the service life of the screening device.

[0006] To achieve the above purpose, the invention provides the following technical solutions:

[0007] A material screening device comprises a device body, a sliding door and a screening device, wherein a feed port is provided at the top of the device body, the interior of the device body is a hollow structure, and at least one screening mechanism is provided inside the device body, the screening mechanism evenly divides the interior of the device body into at least two screening bins, the screening mechanism comprises a clamping fixing sheet and a screen, the top and bottom sides of the edge of the screen are both provided with a clamping fixing sheet, one side of the clamping fixing sheet is tightly fitted and fixed to the interior of the device body, a fixing frame is provided outside the screen, and the bottom of the fixing frame is tightly fixed to the inside of the device body. There are at least two cross-fixed reinforcing rods, and a screw hole is provided in the middle of the top of the fixing frame. The top and bottom of the device body are respectively provided with slide rails that are aligned with each other. The slide rail is located on the front side of the device body. A sliding door is installed inside the slide rail. A discharge port corresponding to the screening bin is provided on one side of the sliding door. A discharge hopper is provided at the bottom of the discharge port. The discharge hopper is located outside the sliding door. A screening device is provided on one side of the device body. A transmission mechanism is connected to one side of the screening device. One end of the transmission mechanism passes through the device body and is fixedly connected to the fixing frame.

[0008] Preferably, the screening device comprises a directional bin and a driving bin, and the bottom of the screening device is folded outward to form an integral floor plate, and fixing screws are provided inside the floor plate.

[0009] Preferably, a motor seat is provided at the bottom of the driving bin, a vertically mounted driving motor is provided at the top of the motor seat, a power ring is sleeved on the end of the rotating shaft of the driving motor, an eccentric shaft is provided on the upper side of the power ring, a first transmission rod is installed on the outside of the eccentric shaft, a second transmission rod is provided on the end of the first transmission rod, the first transmission rod and the second transmission rod are hinged by a pin shaft, a through hole is opened on the upper side of the directional bin, and the second transmission rod is inserted into the through hole.

[0010] Preferably, the transmission mechanism includes a single transmission sub-rod and a connecting mother rod, wherein the single transmission sub-rod is a screw rod, the single transmission sub-rod passes through one side of the device body, and one side of the connecting mother rod is tightly fixed to the second transmission rod.

[0011] Preferably, the single transmission sub-rod is connected to the screw hole of the fixing frame, a connection port is opened on one side of the connecting mother rod, the single transmission sub-rod is inserted into the connection port, and at least two clamping screws are sleeved on the outside of the single transmission sub-rod, and the clamping screws are respectively turned on both sides of the connecting mother rod.

[0012] Preferably, the motor seat is a solid seat, and the interior of the motor seat is filled with concrete.

[0013] Preferably, a material outlet is provided on one side of the discharge hopper, and a material channel is fixedly installed on one side of the material outlet.

[0014] Compared with the prior art, the invention has the following beneficial effects:

[0015] 1. The material screening device provides horizontal screening movement through the screening mechanism, and cooperates with the movable and detachable assembled screen, which solves the problem that the traditional rotary screening machine cannot feed and discharge materials at the same time, and the problem that the vibration screening machine has a complex structure and causes certain damage to the screening device body. Therefore, the material screening process can realize simultaneous feeding and discharging, and the regular screening movement in the horizontal direction can reduce the loss of the device itself and extend the service life of the screening device.

[0016] 2. The material screening device has a directional bin and a driving bin, and the second transmission rod runs through the directional bin, which solves the problem that when the driving motor drives the first transmission rod, the power transmitted to the second transmission rod is unstable, causing the second transmission rod to swing freely and unable to provide a directional power to the screen. As a result, the power of the first transmission rod is converted into unidirectional horizontal power through the cooperation of the second transmission rod and the directional bin, thereby ensuring the screening movement regularity of the screen.

[0017] 3. The material screening device has at least two mutually intersecting reinforcing rods at the bottom of the screen, which solves the problem of the screen being scrapped due to unstable structure after long-term dynamic screening work, thereby strengthening the structure of the screen, increasing the service life of the screen, and saving people's use costs.

[0018] 4. In the material screening device, the screen is fixed by a fixed clamping piece, which solves the problem of multiple screening according to the classification of material particle size during the material screening process. Therefore, people can add or remove the screen according to actual conditions to achieve the purpose of screening out materials of different particle sizes at one time, simplifying the process of people screening materials.

[0019] 5. The motor seat of the material screening device is a solid seat, and the motor seat has a certain mass, which solves the problem that the driving motor causes the screening mechanism to shake during the movement, which is not conducive to the screening work. The driving motor will not affect the overall firmness of the screening mechanism during the movement, and prevents the screening mechanism from being loosely fixed, causing uneven power transmission and affecting the screening of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is an enlarged view of the structure at A of the present invention;

[0022] Figure 3 It is a schematic diagram of the screen structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the screening device of the present invention.

[0024] In the figure: 1-device body; 2-sliding door; 3-feeding port; 4-discharging port; 5-discharging hopper; 6-chute; 7-screening mechanism; 8-transmission mechanism; 9-screening mechanism; 701-clamping fixing plate; 702-screen; 703-fixing frame; 704-screw hole; 705-reinforcement pull rod; 801-single transmission sub-rod; 802-connecting mother rod; 803-second transmission rod; 804-first transmission rod; 805-pin shaft; 901-directional bin; 902-driving bin; 903-ground plate; 904-fixing screw; 905-motor seat; 906-driving motor; 907-power ring; 908-eccentric shaft; 909-through hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1,

[0027] A material screening device, such as Figure 1-4 As shown, it includes a device body 1, a sliding door 2 and a screening device 9, the top of the device body 1 is provided with a feed port 3, the interior of the device body 1 is a hollow structure, and at least one screening mechanism 7 is provided inside the device body 1, the screening mechanism 7 evenly divides the interior of the device body 1 into at least two screening bins, the screening mechanism 7 includes a clamping fixing sheet 701 and a screen 702, the top and bottom sides of the edge of the screen 702 are both provided with a clamping fixing sheet 701, one side of the clamping fixing sheet 701 is tightly fixed to the inside of the device body 1, the outside of the screen 702 is provided with a fixing frame 703, the bottom of the fixing frame 703 is tightly fixed There are at least two cross-fixed reinforcing rods 705, and a screw hole 704 is provided in the middle of the top of the fixing frame 703. The top and bottom of the device body 1 are respectively provided with slide rails 6 that are opposite to each other. The slide rails are located on the front side of the device body 1. A sliding door 2 is installed inside the slide rail 6. A discharge port 4 corresponding to the screening bin is provided on one side of the sliding door 2. A discharge hopper 5 is provided at the bottom of the discharge port 4. The discharge hopper 5 is located on the outside of the sliding door 2. A screening device 9 is provided on one side of the device body 1. A transmission mechanism 8 is connected to one side of the screening device 9. One end of the transmission mechanism 8 passes through the device body 1 and is fixedly connected to the fixing frame 703.

[0028] Embodiment 2:

[0029] A material screening device, such as Figure 1-4 As shown, it includes a device body 1, a sliding door 2 and a screening device 9, the top of the device body 1 is provided with a feed port 3, the interior of the device body 1 is a hollow structure, and at least one screening mechanism 7 is provided inside the device body 1, the screening mechanism 7 evenly divides the interior of the device body 1 into at least two screening bins, the screening mechanism 7 includes a clamping fixing sheet 701 and a screen 702, the top and bottom sides of the edge of the screen 702 are both provided with a clamping fixing sheet 701, one side of the clamping fixing sheet 701 is tightly fixed to the inside of the device body 1, the outside of the screen 702 is provided with a fixing frame 703, the bottom of the fixing frame 703 is tightly fixed There are at least two cross-fixed reinforcing rods 705, and a screw hole 704 is provided in the middle of the top of the fixing frame 703. The top and bottom of the device body 1 are respectively provided with slide rails 6 that are opposite to each other. The slide rails are located on the front side of the device body 1. A sliding door 2 is installed inside the slide rail 6. A discharge port 4 corresponding to the screening bin is provided on one side of the sliding door 2. A discharge hopper 5 is provided at the bottom of the discharge port 4. The discharge hopper 5 is located on the outside of the sliding door 2. A screening device 9 is provided on one side of the device body 1. A transmission mechanism 8 is connected to one side of the screening device 9. One end of the transmission mechanism 8 passes through the device body 1 and is fixedly connected to the fixing frame 703.

[0030] Preferably, the screening device 9 comprises a directional bin 901 and a driving bin 902 , and the bottom of the screening device 9 is folded outward to form an integrated floor plate 903 , and fixing screws 904 are provided inside the floor plate 903 .

[0031] Embodiment 3,

[0032] A material screening device, such as Figure 1-4As shown, it includes a device body 1, a sliding door 2 and a screening device 9, the top of the device body 1 is provided with a feed port 3, the interior of the device body 1 is a hollow structure, and at least one screening mechanism 7 is provided inside the device body 1, the screening mechanism 7 evenly divides the interior of the device body 1 into at least two screening bins, the screening mechanism 7 includes a clamping fixing sheet 701 and a screen 702, the top and bottom sides of the edge of the screen 702 are both provided with a clamping fixing sheet 701, one side of the clamping fixing sheet 701 is tightly fixed to the inside of the device body 1, the outside of the screen 702 is provided with a fixing frame 703, the bottom of the fixing frame 703 is tightly fixed There are at least two cross-fixed reinforcing rods 705, and a screw hole 704 is provided in the middle of the top of the fixing frame 703. The top and bottom of the device body 1 are respectively provided with slide rails 6 that are opposite to each other. The slide rails are located on the front side of the device body 1. A sliding door 2 is installed inside the slide rail 6. A discharge port 4 corresponding to the screening bin is provided on one side of the sliding door 2. A discharge hopper 5 is provided at the bottom of the discharge port 4. The discharge hopper 5 is located on the outside of the sliding door 2. A screening device 9 is provided on one side of the device body 1. A transmission mechanism 8 is connected to one side of the screening device 9. One end of the transmission mechanism 8 passes through the device body 1 and is fixedly connected to the fixing frame 703.

[0033] Preferably, a motor seat 905 is provided at the bottom of the driving bin 902, a vertically mounted driving motor 906 is provided at the top of the motor seat 905, a power ring 907 is sleeved on the end of the rotating shaft of the driving motor 906, an eccentric shaft 908 is provided on the upper side of the power ring 907, a first transmission rod 804 is installed on the outside of the eccentric shaft 908, a second transmission rod 803 is provided at the end of the first transmission rod 804, the first transmission rod 804 and the second transmission rod 803 are hinged by a pin shaft 805, a through hole 909 is opened on the upper side of the directional bin 901, and the second transmission rod 803 is inserted into the through hole 909.

[0034] Embodiment 4:

[0035] A material screening device, such as Figure 1-4As shown, it includes a device body 1, a sliding door 2 and a screening device 9, the top of the device body 1 is provided with a feed port 3, the interior of the device body 1 is a hollow structure, and at least one screening mechanism 7 is provided inside the device body 1, the screening mechanism 7 evenly divides the interior of the device body 1 into at least two screening bins, the screening mechanism 7 includes a clamping fixing sheet 701 and a screen 702, the top and bottom sides of the edge of the screen 702 are both provided with a clamping fixing sheet 701, one side of the clamping fixing sheet 701 is tightly fixed to the inside of the device body 1, the outside of the screen 702 is provided with a fixing frame 703, the bottom of the fixing frame 703 is tightly fixed There are at least two cross-fixed reinforcing rods 705, and a screw hole 704 is provided in the middle of the top of the fixing frame 703. The top and bottom of the device body 1 are respectively provided with slide rails 6 that are opposite to each other. The slide rails are located on the front side of the device body 1. A sliding door 2 is installed inside the slide rail 6. A discharge port 4 corresponding to the screening bin is provided on one side of the sliding door 2. A discharge hopper 5 is provided at the bottom of the discharge port 4. The discharge hopper 5 is located on the outside of the sliding door 2. A screening device 9 is provided on one side of the device body 1. A transmission mechanism 8 is connected to one side of the screening device 9. One end of the transmission mechanism 8 passes through the device body 1 and is fixedly connected to the fixing frame 703.

[0036] Preferably, the transmission mechanism 8 includes a single transmission sub-rod 801 and a connecting mother rod 802, wherein the single transmission sub-rod 801 is a screw rod, the single transmission sub-rod 801 passes through one side of the device body 1, and one side of the connecting mother rod 802 is tightly fixed to the second transmission rod 803.

[0037] Embodiment 5,

[0038] A material screening device, such as Figure 1-4As shown, it includes a device body 1, a sliding door 2 and a screening device 9, the top of the device body 1 is provided with a feed port 3, the interior of the device body 1 is a hollow structure, and at least one screening mechanism 7 is provided inside the device body 1, the screening mechanism 7 evenly divides the interior of the device body 1 into at least two screening bins, the screening mechanism 7 includes a clamping fixing sheet 701 and a screen 702, the top and bottom sides of the edge of the screen 702 are both provided with a clamping fixing sheet 701, one side of the clamping fixing sheet 701 is tightly fixed to the inside of the device body 1, the outside of the screen 702 is provided with a fixing frame 703, the bottom of the fixing frame 703 is tightly fixed There are at least two cross-fixed reinforcing rods 705, and a screw hole 704 is provided in the middle of the top of the fixing frame 703. The top and bottom of the device body 1 are respectively provided with slide rails 6 that are opposite to each other. The slide rails are located on the front side of the device body 1. A sliding door 2 is installed inside the slide rail 6. A discharge port 4 corresponding to the screening bin is provided on one side of the sliding door 2. A discharge hopper 5 is provided at the bottom of the discharge port 4. The discharge hopper 5 is located on the outside of the sliding door 2. A screening device 9 is provided on one side of the device body 1. A transmission mechanism 8 is connected to one side of the screening device 9. One end of the transmission mechanism 8 passes through the device body 1 and is fixedly connected to the fixing frame 703.

[0039] Preferably, the single transmission sub-rod 801 is connected to the screw hole 804 of the fixing frame 703, a connection port is opened on one side of the connecting mother rod 802, the single transmission sub-rod 801 is inserted into the connection port, and at least two clamping screws are sleeved on the outside of the single transmission sub-rod 801, and the clamping screws are respectively turned on both sides of the connecting mother rod 802.

[0040] Embodiment 6,

[0041] A material screening device, such as Figure 1-4As shown, it includes a device body 1, a sliding door 2 and a screening device 9, the top of the device body 1 is provided with a feed port 3, the interior of the device body 1 is a hollow structure, and at least one screening mechanism 7 is provided inside the device body 1, the screening mechanism 7 evenly divides the interior of the device body 1 into at least two screening bins, the screening mechanism 7 includes a clamping fixing sheet 701 and a screen 702, the top and bottom sides of the edge of the screen 702 are both provided with a clamping fixing sheet 701, one side of the clamping fixing sheet 701 is tightly fixed to the inside of the device body 1, the outside of the screen 702 is provided with a fixing frame 703, the bottom of the fixing frame 703 is tightly fixed There are at least two cross-fixed reinforcing rods 705, and a screw hole 704 is provided in the middle of the top of the fixing frame 703. The top and bottom of the device body 1 are respectively provided with slide rails 6 that are opposite to each other. The slide rails are located on the front side of the device body 1. A sliding door 2 is installed inside the slide rail 6. A discharge port 4 corresponding to the screening bin is provided on one side of the sliding door 2. A discharge hopper 5 is provided at the bottom of the discharge port 4. The discharge hopper 5 is located on the outside of the sliding door 2. A screening device 9 is provided on one side of the device body 1. A transmission mechanism 8 is connected to one side of the screening device 9. One end of the transmission mechanism 8 passes through the device body 1 and is fixedly connected to the fixing frame 703.

[0042] Preferably, the motor seat 905 is a solid seat, and the interior of the motor seat 905 is filled with concrete.

[0043] Embodiment 7,

[0044] A material screening device, such as Figure 1-4As shown, it includes a device body 1, a sliding door 2 and a screening device 9, the top of the device body 1 is provided with a feed port 3, the interior of the device body 1 is a hollow structure, and at least one screening mechanism 7 is provided inside the device body 1, the screening mechanism 7 evenly divides the interior of the device body 1 into at least two screening bins, the screening mechanism 7 includes a clamping fixing sheet 701 and a screen 702, the top and bottom sides of the edge of the screen 702 are both provided with a clamping fixing sheet 701, one side of the clamping fixing sheet 701 is tightly fixed to the inside of the device body 1, the outside of the screen 702 is provided with a fixing frame 703, the bottom of the fixing frame 703 is tightly fixed There are at least two cross-fixed reinforcing rods 705, and a screw hole 704 is provided in the middle of the top of the fixing frame 703. The top and bottom of the device body 1 are respectively provided with slide rails 6 that are opposite to each other. The slide rails are located on the front side of the device body 1. A sliding door 2 is installed inside the slide rail 6. A discharge port 4 corresponding to the screening bin is provided on one side of the sliding door 2. A discharge hopper 5 is provided at the bottom of the discharge port 4. The discharge hopper 5 is located on the outside of the sliding door 2. A screening device 9 is provided on one side of the device body 1. A transmission mechanism 8 is connected to one side of the screening device 9. One end of the transmission mechanism 8 passes through the device body 1 and is fixedly connected to the fixing frame 703.

[0045] Preferably, a material leakage port is opened on one side of the discharge hopper 5, and a material channel is fixedly installed on one side of the material leakage port.

[0046] When in use, first, install the planned screens one by one from top to bottom in advance according to the size of the mesh holes, then put the material to be screened into the device body 1 through the feed port, and finally start the screening device 9, and the driving motor 906 drives the rotation of the power ring 907 to make the eccentric shaft 908 rotate, driving the first transmission rod 804 and the second transmission rod 803 to perform horizontal screening. The horizontal screening movement of the first transmission rod 803 causes the screen 702 to screen between the clamping fixed plates, so that the material on the screen is quickly screened, and finally, the screened material will be temporarily stored in the discharge hopper 5 through the discharge port 4 according to the particle size, thereby completing the entire screening process. The material screening device provides horizontal screening through the screening mechanism 9, and cooperates with the movable and detachable assembled screen 702, which solves the problem that the traditional rotary screening machine cannot feed and discharge at the same time and the problem that the vibration screening machine has a complex structure and has certain damage to the screening device body, so that the material screening process can realize simultaneous feeding and discharging, and the regular screening in the horizontal direction can reduce the loss of the device itself and extend the service life of the screening device. The material screening device has a directional bin 901 and a driving bin 902, and the second transmission rod 803 runs through the directional bin 901, which solves the problem that when the driving motor 906 drives the first transmission rod 804, the power transmitted to the second transmission rod 803 is unstable, so that the second transmission rod 803 can shake freely and cannot provide a directional power to the screen 702, so that the power of the first transmission rod 804 is converted into a unidirectional horizontal power through the cooperation of the second transmission rod 803 and the directional bin 901, ensuring the regular screening of the screen 702. In the material screening device, at least two mutually intersecting reinforcing rods 905 are provided at the bottom of the screen 702, which solves the problem that the screen 702 is scrapped due to an unstable structure after long-term dynamic screening work, thereby reinforcing the structure of the screen 702, increasing the service life of the screen 702, and saving people's use cost. In the material screening device, the screen 702 is clamped and fixed by a fixed clamping piece 701, which solves the problem that multiple screenings are required according to the classification of the material particle size during the material screening process, so that people can add or remove the screen 702 according to actual conditions to achieve the purpose of screening out materials of different particle sizes at one time, simplifying the process of people screening materials. In the material screening device, the motor seat 905 is a solid seat, and the motor seat 905 has a certain mass, which solves the problem that the driving motor 906 causes the screening mechanism to shake during the movement, which is not conducive to the screening work, so that the driving motor 906 will not affect the overall firmness of the screening mechanism 6 during the movement, and prevent the screening mechanism 6 from being fixed loosely and causing uneven power transmission and affecting the screening of materials.

[0047] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A material screening device, comprising a device body (1), a sliding door (2) and a screening device (9), characterized in that: The top of the device body (1) is provided with a feed inlet (3), the interior of the device body (1) is a hollow structure, and at least one screening mechanism (7) is provided inside the device body (1), the screening mechanism (7) evenly divides the interior of the device body (1) into at least two screening bins, the screening mechanism (7) comprises a clamping fixing sheet (701) and a screen (702), the top and bottom sides of the edge of the screen (702) are both provided with a clamping fixing sheet (701), one side of the clamping fixing sheet (701) is tightly fitted and fixed to the interior of the device body (1), the outside of the screen (702) is provided with a fixing frame (703), and the bottom of the fixing frame (703) is tightly fixed with at least two cross-fixed reinforcing pulls A rod (705) is provided, and a screw hole (704) is provided in the middle of the top of the fixing frame (703), and slide rails (6) which are mutually grooved are provided at the top and bottom of the device body (1), and the slide rails are located on the front side of the device body (1), and a sliding door (2) is installed inside the slide rail (6), and a discharge port (4) corresponding to the screening bin is provided on one side of the sliding door (2), and a discharge hopper (5) is provided at the bottom of the discharge port (4), and the discharge hopper (5) is located outside the sliding door (2), and a screening device (9) is provided on one side of the device body (1), and a transmission mechanism (8) is connected to one side of the screening device (9), and one end of the transmission mechanism (8) passes through the device body (1) and is fixedly connected to the fixing frame (703); The screening device (9) comprises a directional bin (901) and a driving bin (902); the bottom of the screening device (9) is folded outward to form an integral floor plate (903); a fixing screw (904) is provided inside the floor plate (903); A material discharge port is provided on one side of the discharge hopper (5), and a material channel is fixedly installed on one side of the material discharge port.

2. A material screening device according to claim 1, characterized in that: A motor seat (905) is provided at the bottom of the driving bin (902), a vertically mounted driving motor (906) is provided at the top of the motor seat (905), a power ring (907) is sleeved on the end of the rotating shaft of the driving motor (906), an eccentric shaft (908) is provided on the upper side of the power ring (907), a first transmission rod (804) is installed on the outside of the eccentric shaft (908), a second transmission rod (803) is provided at the end of the first transmission rod (804), the first transmission rod (804) and the second transmission rod (803) are hinged by a pin (805), a through hole (909) is opened on the upper side of the directional bin (901), and the second transmission rod (803) is inserted into the through hole (909).

3. A material screening device according to claim 1, characterized in that: The transmission mechanism (8) comprises a single transmission sub-rod (801) and a connecting mother rod (802), wherein the single transmission sub-rod (801) is a screw rod, the single transmission sub-rod (801) passes through one side of the device body (1), and one side of the connecting mother rod (802) is tightly fixed to the second transmission rod (803).

4. A material screening device according to claim 3, characterized in that: The single transmission sub-rod (801) is connected to the screw hole (704) of the fixing frame (703), a connection port is opened on one side of the connecting mother rod (802), the single transmission sub-rod (801) is inserted into the connection port, and at least two clamping screws are sleeved on the outside of the single transmission sub-rod (801), and the clamping screws are respectively turned on both sides of the connecting mother rod (802).

5. A material screening device according to claim 2, characterized in that: The motor seat (905) is a solid seat, and the interior of the motor seat (905) is filled with concrete.

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