Linear vibrating screen

Abstract

This invention belongs to the field of vibrating screen technology and discloses a linear vibrating screen, including a support, a buffer assembly, a limiting shell, a feed plate, a screen, a first discharge port, a second discharge port, and a vibrating assembly. Buffer assemblies are fixedly connected to the four corners of the top of the support, and the limiting shell is fixedly connected to the inner side of each buffer assembly. During screening, the vibrating assembly drives the first transmission assembly to move, which in turn drives the second transmission assembly to move. This causes the second transmission belt to be driven by the third transmission wheel. The second transmission belt, through a connecting block, drives a telescopic assembly to move. When the telescopic assembly moves, it drives the upper pressure assembly to move along the bottom surface of the screen. Due to the engagement of the gears and toothed plates, the pressure assembly rotates as a whole, causing the plastic block to intermittently squeeze the bottom of the screen, thus preventing material from accumulating at the top of the screen and increasing screening efficiency.

Description

Technical Field

[0001] This invention belongs to the field of vibrating screen technology, specifically a linear vibrating screen. Background Technology

[0002] A vibrating screen, also known as a sieve machine, is a machine for screening materials. It uses two motors rotating synchronously in opposite directions to generate a reverse excitation force from the vibrator, which forces the screen to move longitudinally. The material on the screen is affected by the excitation force and is periodically thrown forward a certain distance, thereby achieving the function of screening materials.

[0003] In existing technologies, the screen mesh of vibrating screens is mostly made of thin metal mesh to ensure service life. However, due to the influence of gravity, the weight of the flat screen mesh is located in the middle, forcing a certain concavity in the middle of the screen mesh. As a result, when screening objects, more material is concentrated in the middle of the screen mesh, making the material unevenly distributed on the screen mesh. This increases the distance required to complete screening, resulting in poor material screening effect. Furthermore, because too much material is concentrated in the middle position, the material in direct contact with the screen mesh is subjected to greater pressure. Some materials that are slightly larger than the screen mesh aperture are easy to get stuck in the mesh, affecting screening. Therefore, to address the above problems, a linear vibrating screen with uniform material dispersion, anti-clogging screening, and wide applicability is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a linear vibrating screen. During screening, the vibrating component drives the first transmission component to move, which in turn drives the second transmission component to move. This causes the second transmission belt to move via the third transmission wheel. At this time, the second transmission belt drives the telescopic component to move via the connecting block. Since the first limiting component is fixed and slidably connected to the telescopic component inside the second slide groove, and the connecting block is movably sleeved with the telescopic component, the limiting of the first limiting component ensures that the telescopic component is vertical. When the telescopic component moves, it drives the upper pressure component to move along the bottom surface of the screen. Due to the cooperation of the gear and the toothed plate, the pressure component rotates as a whole, causing the plastic block to intermittently squeeze the bottom of the screen, thereby preventing the material from accumulating in the middle of the top of the screen, thus improving the screening efficiency and solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a linear vibrating screen, comprising a support, a buffer assembly, a limiting shell, a feed plate, a screen, a first discharge port, a second discharge port, and a vibrating assembly. Buffer assemblies are fixedly connected to the four corners of the top of the support. The limiting shell is fixedly connected to the inner side of the buffer assembly. A feed plate is fixedly installed at one end of the top of the support. A screen is fixedly installed at the upper end of the inner cavity of the limiting shell. The first discharge port and the second discharge port are fixedly installed sequentially from top to bottom at the upper end of the inner cavity of the limiting shell away from the screen. Two symmetrically distributed discharge ports are fixedly installed on the side of the limiting shell away from the first discharge port. A vibration assembly, wherein a first transmission assembly is fixedly mounted at the end of the output shaft of one of the vibration assemblies, a second transmission assembly is fixedly mounted at the middle of the end of the first transmission assembly away from the vibration assembly, a second transmission belt is driven to both ends of the second transmission assembly, a connecting block is fixedly connected to the top of the second transmission belt, a telescopic assembly is movably sleeved at one end of the connecting block, a first limiting assembly is fixedly mounted at the middle of the telescopic assembly, a pressure assembly is fixedly connected to the upper end of the telescopic assembly, toothed plates are engaged at the bottom of both ends of the pressure assembly, and a second limiting assembly is driven to the end of the second transmission belt away from the second transmission assembly.

[0006] Preferably, the first transmission assembly includes a first transmission wheel, a first transmission belt is connected to the outer side of the first transmission wheel, a second transmission wheel is connected to the inner side of the end of the first transmission belt away from the first transmission wheel, the middle part of the first transmission wheel is fixedly connected to the output shaft of the vibration assembly, and the middle part of the second transmission wheel is fixedly connected to the second transmission assembly.

[0007] Preferably, the second transmission assembly includes a transmission rod, with a first fixing block connected to both ends of the middle portion of the transmission rod via a third bearing, and a third transmission wheel fixedly installed at both ends of the transmission rod. The first fixing block is fixedly connected to the inner wall of the limiting housing, and the middle portion of the transmission rod is fixedly connected to the second transmission wheel in the first transmission assembly.

[0008] Preferably, the telescopic assembly includes a fixed sleeve, a first arm movably sleeved at the lower end of the fixed sleeve, a second arm movably sleeved at the upper end of the fixed sleeve, a first bearing fixedly connected to the top of the second arm, a second spring fixedly installed at the bottom of the inner cavity of the upper end of the fixed sleeve, a first spring fixedly installed at the top of the inner cavity of the lower end of the fixed sleeve, the lower end of the first arm movably sleeved with a connecting block, and the inner wheel of the first bearing fixedly connected to the telescopic assembly.

[0009] Preferably, the first limiting component includes a first limiting rod, a first limiting block is fixedly installed on the surface of the first limiting rod, and pulleys are movably sleeved at both ends of the top and bottom of the first limiting block. The first limiting rod is fixedly connected to the fixed sleeve in the telescopic component, and the pulleys are in contact with the limiting housing.

[0010] Preferably, the pressure assembly includes a connecting rod, a pressure rod is fixedly installed on the surface of the middle part of the connecting rod, gears are fixedly installed at both ends of the connecting rod, a plastic block is fixedly installed at the bottom of the pressure rod, the connecting rod is fixedly connected to the inner wheel of the first bearing in the telescopic assembly, and the top of the pressure rod contacts the bottom of the screen.

[0011] Preferably, the plastic block is arc-shaped, and the height of the middle part of the plastic block is greater than the height of the two ends. The pressure rod is cylindrical, and the pressure rod and the plastic block contact the bottom of the screen in sequence when the pressure assembly rotates.

[0012] Preferably, the second limiting component includes a fourth transmission wheel, a fixing rod is fixedly installed in the middle of the fourth transmission wheel, a second bearing is fixedly installed at both ends of the middle of the fixing rod, a second fixing block is fixedly connected to the outside of the second bearing, the bottom of the second fixing block is fixedly connected to the bottom of the inner cavity of the limiting housing, and the outside of the fourth transmission wheel is connected to the second transmission belt.

[0013] Preferably, a first sliding groove and a second sliding groove are sequentially formed on both sides of the inner cavity of the limiting shell from top to bottom. A toothed plate is fixedly installed at the bottom of the first sliding groove. The gear in the pressure assembly is located inside the first sliding groove. A first limiting assembly is provided inside the second sliding groove. The top and bottom of the second sliding groove are in contact with the pulleys located at the top and bottom of the first limiting block in the first limiting assembly.

[0014] Preferably, when the overall length of the fixed sleeve and the first arm in the telescopic assembly is at its minimum, the first spring is in its normal state; when the overall length of the fixed sleeve and the first arm is at its maximum, the connecting block is located below the second transmission belt, and the first spring is in a stretched state.

[0015] The beneficial effects of this invention are as follows:

[0016] This invention utilizes a combination of a vibration assembly, a first transmission assembly, and a second transmission assembly. During screening, the vibration assembly drives the first transmission assembly, which in turn drives the second transmission assembly. This, in turn, causes the second transmission belt to move via a third transmission wheel. The second transmission belt then drives the telescopic assembly via a connecting block. Since the first limiting assembly is fixed to and slidably connected to the telescopic assembly inside the second chute, and the connecting block is movably sleeved with the telescopic assembly, the limiting of the first limiting assembly ensures that the telescopic assembly remains vertical. When the telescopic assembly moves, it drives the upper pressure assembly to move along the bottom surface of the screen. Due to the engagement of the gears and toothed plates, the pressure assembly rotates, causing the plastic block to intermittently squeeze the bottom of the screen, thus preventing material from accumulating at the top of the screen and increasing screening efficiency.

[0017] This invention utilizes a combination of a vibration assembly, a first transmission assembly, and a second transmission assembly. During screening, the vibration assembly drives the first transmission assembly, which in turn drives the second transmission assembly. This, in turn, causes the second transmission belt to move via a third transmission wheel. The second transmission belt then drives the telescopic assembly via a connecting block. Since the first limiting assembly is fixed to and slidably connected to the telescopic assembly inside the second chute, and the connecting block is movably sleeved with the telescopic assembly, the limiting of the first limiting assembly ensures that the telescopic assembly remains vertical. When the telescopic assembly moves, it drives the upper pressure assembly to move along the bottom surface of the screen. Due to the engagement of the gears and toothed plates, the pressure assembly rotates. Through the compression of the pressure rod and the plastic block, the material stuck in the mesh is released from the mesh under pressure, preventing the material from clogging the mesh.

[0018] This invention, through the cooperation of structures such as a telescopic component, a first limiting component, and a pressure component, ensures that during screening, the telescopic component remains vertical through the cooperation of the first limiting component and the second sliding groove. The fixed sleeve, the second arm, and the second spring work together to keep the pressure component in constant contact with the bottom surface of the screen and apply pressure to it. This allows the invention to adapt to screens with different aperture values, thus improving the adaptability of the device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall appearance of the invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the overall appearance of the invention. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the internal structure of the limiting shell of the present invention;

[0022] Figure 4 For the present invention Figure 3 A magnified diagram is shown in section A.

[0023] Figure 5 This is a cross-sectional view of the structure at the limiting shell of the present invention;

[0024] Figure 6 This is a partial view of the internal structure of the limiting shell of the present invention;

[0025] Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle;

[0026] Figure 8 This is a schematic diagram of the structure at the plastic block of the present invention;

[0027] Figure 9 This is a detailed structural diagram of the first limiting component of the present invention;

[0028] Figure 10 This is a cross-sectional view of the structure at the fixed sleeve of the present invention.

[0029] In the diagram: 1. Bracket; 2. Buffer assembly; 3. Limiting shell; 4. Feed plate; 5. Screen; 6. First discharge port; 7. Second discharge port; 8. Vibration assembly; 9. First transmission assembly; 91. First transmission wheel; 92. First transmission belt; 93. Second transmission wheel; 10. Second transmission assembly; 101. Transmission rod; 102. First fixing block; 103. Third transmission wheel; 12. Connecting block; 13. Telescopic assembly; 131. Fixing sleeve; 132. First arm; 133. Two-arm lever; 134, First bearing; 135, First spring; 136, Second spring; 14, First limiting assembly; 141, First limiting rod; 142, First limiting block; 143, Pulley; 15, Pressure assembly; 151, Connecting rod; 152, Gear; 153, Pressure rod; 154, Plastic block; 16, Toothed plate; 17, Second transmission belt; 18, Second limiting assembly; 181, Fourth transmission wheel; 182, Second fixing block; 183, Fixing rod; 184, Second bearing. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figures 1 to 10As shown, this embodiment of the invention provides a linear vibrating screen, including a support 1, a buffer assembly 2, a limiting shell 3, a feed plate 4, a screen 5, a first discharge port 6, a second discharge port 7, and a vibrating assembly 8. Buffer assemblies 2 are fixedly connected to the four corners of the top of the support 1. The limiting shell 3 is fixedly connected to the inner side of the buffer assembly 2. The feed plate 4 is fixedly installed at one end of the top of the support 1. The screen 5 is fixedly installed at the upper end of the inner cavity of the limiting shell 3. The first discharge port 6 and the second discharge port 7 are fixedly installed sequentially from top to bottom at the upper end of the inner cavity of the limiting shell 3 away from the screen 5. Symmetrically distributed... The system comprises two vibration components 8. A first transmission component 9 is fixedly mounted at the end of the output shaft of one vibration component 8. A second transmission component 10 is fixedly mounted at the middle of the end of the first transmission component 9 furthest from the vibration component 8. Both ends of the second transmission component 10 are connected to a second transmission belt 17. A connecting block 12 is fixedly connected to the top of the second transmission belt 17. A telescopic component 13 is movably sleeved at one end of the connecting block 12. A first limiting component 14 is fixedly mounted in the middle of the telescopic component 13. A pressure component 15 is fixedly connected to the upper end of the telescopic component 13. Toothed plates 16 mesh at the bottom of both ends of the pressure component 15. The second transmission belt 17 is furthest from the second transmission component 8. One end of the transmission assembly 10 is connected to the second limiting assembly 18. When the vibration assembly 8 is working, it drives the first transmission assembly 9 to move, which in turn drives the second transmission assembly 10 to move. The first fixing block 102 in the second transmission assembly 10 limits the position of the transmission rod 101. Thus, under the drive of the first transmission assembly 9, the transmission rod 101 and the third transmission wheel 103 rotate. At this time, the second transmission belt 17 is driven by the third transmission wheel 103 to move, thereby driving the telescopic assembly 13 to move through the connecting block 12. Since the first limiting assembly 14 is fixed and slidably connected to the telescopic assembly 13 inside the second slide groove, the transmission assembly 10 is also connected to the first limiting assembly 14. Furthermore, the connecting block 12 is movably connected to the telescopic component 13. Therefore, the limiting of the first limiting component 14 can ensure that the telescopic component 13 is vertical. When the telescopic component 13 moves, it drives the upper pressure component 15 to move along the bottom surface of the screen 5. Due to the cooperation between the gear 152 and the toothed plate 16, the pressure component 15 rotates as a whole, thereby causing the plastic block 154 to intermittently squeeze the bottom of the screen 5, thus preventing the material from accumulating in the middle position at the top of the screen 5. Simultaneously, through the squeezing of the pressure rod 153 and the plastic block 154, the material stuck in the mesh is released from the mesh under pressure, ensuring the effect of use.

[0032] like Figure 5 and Figure 6As shown, the first transmission assembly 9 includes a first transmission wheel 91, a first transmission belt 92 is connected to the outer side of the first transmission wheel 91, and a second transmission wheel 93 is connected to the inner side of the end of the first transmission belt 92 away from the first transmission wheel 91. The middle part of the first transmission wheel 91 is fixedly connected to the output shaft of the vibration assembly 8, and the middle part of the second transmission wheel 93 is fixedly connected to the second transmission assembly 10. The vibration assembly 8 serves as the power source. The vibration assembly 8 is a combination of a motor and an exciter. The first transmission wheel 91 is fixed to the end of the motor output shaft. The vibration assembly 8 is existing technology and therefore will not be described in detail. The first transmission belt 92 drives the second transmission wheel 93 to rotate, which in turn drives the second transmission assembly 10 to rotate, achieving better stability.

[0033] like Figure 6 and Figure 7 As shown, the second transmission assembly 10 includes a transmission rod 101. Both ends of the transmission rod 101 are connected to a first fixing block 102 via a third bearing. A third transmission wheel 103 is fixedly installed at both ends of the transmission rod 101. The first fixing block 102 is fixedly connected to the inner wall of the limiting housing 3. The middle part of the transmission rod 101 is fixedly connected to the second transmission wheel 93 in the first transmission assembly 9. By fixing the first fixing block 102 to the inner wall of the limiting housing 3, the positions of the transmission rod 101 and the third transmission wheel 103 are limited, ensuring the stability of their rotation under the drive of the second transmission wheel 93. Furthermore, the connection via the third bearing reduces the friction force experienced by the transmission rod 101 during rotation, ensuring the effectiveness of the application.

[0034] like Figure 9 and Figure 10As shown, the telescopic assembly 13 includes a fixed sleeve 131. A first arm 132 is movably sleeved at the lower end of the fixed sleeve 131, and a second arm 133 is movably sleeved at the upper end of the fixed sleeve 131. A first bearing 134 is fixedly connected to the top of the second arm 133. A second spring 136 is fixedly installed at the bottom of the inner cavity of the upper end of the fixed sleeve 131, and a first spring 135 is fixedly installed at the top of the inner cavity of the lower end of the fixed sleeve 131. The lower end of the first arm 132 is movably sleeved with a connecting block 12. The inner wheel of the first bearing 134 is fixedly connected to the telescopic assembly 13. When the overall length of the fixed sleeve 131 and the first arm 132 in the telescopic assembly 13 is at its minimum, the first spring 135 is in its normal state. When the overall length of the fixed sleeve 131 and the first arm 132 is at its maximum, the connecting block 12 is located at the second transmission belt 17. Below, and the first spring 135 is in a stretched state; through the cooperation of the fixed sleeve 131, the first arm 132 and the first spring 135, it can be ensured that when the second transmission belt 17 drives the connecting block 12 to rotate and the connecting block 12 is located at the bottom of the second transmission belt 17, the telescopic component 13 still remains sleeved with the connecting block 12, and the telescopic component 13 can remain vertical. In this way, when the second transmission belt 17 drives the connecting block 12 to move, the telescopic component 13 reciprocates at the bottom of the screen 5, achieving a better use effect. The cooperation of the fixed sleeve 131, the second arm 133 and the second spring 136 can keep the pressure component 15 in contact with the bottom surface of the screen 5 through elasticity and apply a certain pressure to the bottom surface of the screen 5, which can adapt to screens 5 with different aperture values, making the device more adaptable.

[0035] like Figure 9 As shown, the first limiting component 14 includes a first limiting rod 141, a first limiting block 142 fixedly mounted on the surface of the first limiting rod 141, and pulleys 143 movably sleeved at both ends of the top and bottom of the first limiting block 142. The first limiting rod 141 is fixedly connected to the fixed sleeve 131 in the telescopic component 13, and the pulleys 143 are in contact with the limiting housing 3. By connecting the first limiting rod 141 to the telescopic component 13, the first limiting block 142 and pulleys 143 located in the second slide groove limit the telescopic component 13. This reduces the friction of the first limiting component 14 moving in the second slide groove and ensures that the telescopic component 13 is always in a vertical state, thereby ensuring the contact between the pressure component 15 and the bottom surface of the screen 5. Furthermore, the design of the first bearing 134 reduces the friction of the pressure component 15 when it rotates, ensuring better performance.

[0036] like Figure 6 and Figure 7As shown, the pressure assembly 15 includes a connecting rod 151, a pressure rod 153 fixedly mounted on the middle surface of the connecting rod 151, gears 152 fixedly mounted on both ends of the connecting rod 151, and a plastic block 154 fixedly mounted on the bottom of the pressure rod 153. The connecting rod 151 is fixedly connected to the inner wheel of the first bearing 134 in the telescopic assembly 13. The top of the pressure rod 153 contacts the bottom of the screen 5. The plastic block 154 is arc-shaped, and the height of the middle part of the plastic block 154 is greater than the height of both ends. The pressure rod 153 is cylindrical. When the pressure assembly 15 rotates, the pressure rod 153 and the plastic block 154 contact the bottom of the screen 5 in sequence. Through the gear 152 and the toothed plate 16, the pressure assembly 15 can rotate on its own when it is moved by the telescopic assembly 13. This causes the plastic block 154 to intermittently support and push the bottom surface of the screen 5, preventing the material from accumulating in the middle of the top of the screen 5, making the material distribution more uniform, and thus ensuring screening efficiency.

[0037] like Figure 5 and Figure 6 As shown, the second limiting component 18 includes a fourth transmission wheel 181. A fixing rod 183 is fixedly installed in the middle of the fourth transmission wheel 181. Second bearings 184 are fixedly installed at both ends of the middle of the fixing rod 183. A second fixing block 182 is fixedly connected to the outer side of the second bearing 184. The bottom of the second fixing block 182 is fixedly connected to the bottom of the inner cavity of the limiting housing 3. The outer side of the fourth transmission wheel 181 is connected to the second transmission belt 17. The second fixing block 182 limits the position of the fixing rod 183 and the fourth transmission wheel 181. The fourth transmission wheel 181 cooperates with the second transmission belt 17 to ensure that the second transmission belt 17 can move stably, thereby ensuring the stability of the telescopic component 13.

[0038] like Figure 3 and Figure 4 As shown, a first groove and a second groove are sequentially provided on both sides of the inner cavity of the limiting housing 3 from top to bottom. A toothed plate 16 is fixedly installed at the bottom of the first groove. The gear 152 in the pressure assembly 15 is located inside the first groove. A first limiting assembly 14 is provided inside the second groove. The top and bottom of the second groove are in contact with the pulleys 143 located at the top and bottom of the first limiting block 142 in the first limiting assembly 14. The first groove limits the gear 152 in the pressure assembly 15, ensuring the stability of the pressure assembly 15 when rotating. The design of the second groove is adapted to the first limiting assembly 14, thereby limiting the telescopic assembly 13 through the first limiting assembly 14, ensuring the stability of the telescopic assembly 13 when moving.

[0039] Working principle and usage process:

[0040] During screening, the vibration assembly 8 is activated, driving the first transmission assembly 9 to move. The vibration assembly 8 then vibrates the limiting housing 3 and its internal structure. The movement of the first transmission assembly 9 drives the second transmission assembly 10 to move synchronously. The first fixed block 102 in the second transmission assembly 10 limits the position of the transmission rod 101, ensuring structural stability. Driven by the first transmission assembly 9, the transmission rod 101 and the third transmission wheel 103 rotate. The second transmission belt 17 is then driven by the third transmission wheel 103, allowing it to move via the connecting block 12 and the telescopic assembly 13. Because the first limiting assembly 14 is fixedly and slidably connected to the telescopic assembly 13 inside the second groove, and the fixed sleeve 131, the first arm 132, and the first spring 135 work together to ensure that the second transmission belt 17 drives the connecting block 12 to rotate and... When the connecting block 12 is located at the bottom of the second transmission belt 17, the telescopic component 13 remains connected to the connecting block 12. Therefore, the limiting of the first limiting component 14 and the design of the telescopic component 13 can ensure that the telescopic component 13 is vertical. When the second transmission belt 17 drives the connecting block 12 to move, the telescopic component 13 reciprocates at the bottom of the screen 5, achieving a better performance. When the telescopic component 13 moves, it drives the upper pressure component 15 to move along the bottom surface of the screen 5. Due to the cooperation between the gear 152 and the toothed plate 16, the pressure component 15 rotates, causing the plastic block 154 to intermittently squeeze the bottom of the screen 5, thereby preventing the material from accumulating in the middle position at the top of the screen 5. Simultaneously, through the squeezing of the pressure rod 153 and the plastic block 154, the material stuck in the mesh is released from the mesh under pressure, ensuring the performance.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A linear vibrating screen, comprising a support (1), a buffer assembly (2), a limiting shell (3), a feed plate (4), a screen (5), a first discharge port (6), a second discharge port (7), and a vibrating assembly (8), wherein the four corners of the top of the support (1) are fixedly connected to the buffer assembly (2), the inner side of the buffer assembly (2) is fixedly connected to the limiting shell (3), the feed plate (4) is fixedly installed at one end of the top of the support (1), the screen (5) is fixedly installed at the upper end of the inner cavity of the limiting shell (3), the first discharge port (6) and the second discharge port (7) are fixedly installed from top to bottom at the upper end of the inner cavity of the limiting shell (3) away from the screen (5), and two symmetrically distributed vibrating assemblies (8) are fixedly installed on the side of the limiting shell (3) away from the first discharge port (6), characterized in that: A first transmission component (9) is fixedly installed at the end of the output shaft of one of the vibration components (8). A second transmission component (10) is fixedly installed at the middle of the end of the first transmission component (9) away from the vibration component (8). A second transmission belt (17) is connected to both ends of the second transmission component (10). A connecting block (12) is fixedly connected to the top of the second transmission belt (17). A telescopic component (13) is movably sleeved at one end of the connecting block (12). A first limiting component (14) is fixedly installed in the middle of the telescopic component (13). A pressure component (15) is fixedly connected to the upper end of the telescopic component (13). Tooth plates (16) mesh at the bottom of both ends of the pressure component (15). A second limiting component (18) is connected to the end of the second transmission belt (17) away from the second transmission component (10). The pressure assembly (15) includes a connecting rod (151), a pressure rod (153) is fixedly installed on the surface of the middle part of the connecting rod (151), gears (152) are fixedly installed at both ends of the connecting rod (151), a plastic block (154) is fixedly installed at the bottom of the pressure rod (153), the connecting rod (151) is fixedly connected to the inner wheel of the first bearing (134) in the telescopic assembly (13), and the top of the pressure rod (153) contacts the bottom of the screen (5). The plastic block (154) is arc-shaped, and the height of the middle part of the plastic block (154) is greater than the height of the two ends. The pressure rod (153) is cylindrical. When the pressure assembly (15) rotates, the pressure rod (153) and the plastic block (154) successively contact the bottom of the screen (5).

2. The linear vibrating screen according to claim 1, characterized in that: The first transmission assembly (9) includes a first transmission wheel (91), a first transmission belt (92) is connected to the outer side of the first transmission wheel (91), a second transmission wheel (93) is connected to the inner side of the end of the first transmission belt (92) away from the first transmission wheel (91), the middle part of the first transmission wheel (91) is fixedly connected to the output shaft of the vibration assembly (8), and the middle part of the second transmission wheel (93) is fixedly connected to the second transmission assembly (10).

3. The linear vibrating screen according to claim 1, characterized in that: The second transmission assembly (10) includes a transmission rod (101). Both ends of the middle part of the transmission rod (101) are connected to a first fixing block (102) through a third bearing. A third transmission wheel (103) is fixedly installed at both ends of the transmission rod (101). The first fixing block (102) is fixedly connected to the inner wall of the limiting shell (3). The middle part of the transmission rod (101) is fixedly connected to the second transmission wheel (93) in the first transmission assembly (9).

4. The linear vibrating screen according to claim 1, characterized in that: The telescopic assembly (13) includes a fixed sleeve (131), the lower end of which is movably sleeved with a first arm (132), the upper end of which is movably sleeved with a second arm (133), the top of which is fixedly connected with a first bearing (134), the bottom of the upper end of the fixed sleeve (131) is fixedly installed with a second spring (136), the top of the lower end of the fixed sleeve (131) is fixedly installed with a first spring (135), the lower end of the first arm (132) is movably sleeved with a connecting block (12), and the inner wheel of the first bearing (134) is fixedly connected with the telescopic assembly (13).

5. The linear vibrating screen according to claim 1, characterized in that: The first limiting component (14) includes a first limiting rod (141), a first limiting block (142) is fixedly installed on the surface of the first limiting rod (141), and pulleys (143) are movably sleeved at both ends of the top and bottom of the first limiting block (142). The first limiting rod (141) is fixedly connected to the fixed sleeve (131) in the telescopic component (13), and the pulleys (143) are in contact with the limiting shell (3).

6. The linear vibrating screen according to claim 1, characterized in that: The second limiting component (18) includes a fourth transmission wheel (181), a fixing rod (183) is fixedly installed in the middle of the fourth transmission wheel (181), a second bearing (184) is fixedly installed at both ends of the middle of the fixing rod (183), a second fixing block (182) is fixedly connected to the outside of the second bearing (184), the bottom of the second fixing block (182) is fixedly connected to the bottom of the inner cavity of the limiting housing (3), and the outside of the fourth transmission wheel (181) is connected to the second transmission belt (17).

7. The linear vibrating screen according to claim 5, characterized in that: The inner cavity of the limiting shell (3) has a first sliding groove and a second sliding groove opened from top to bottom on both sides. A toothed plate (16) is fixedly installed at the bottom of the first sliding groove. The gear (152) in the pressure assembly (15) is located inside the first sliding groove. The second sliding groove is provided with a first limiting assembly (14). The top and bottom of the second sliding groove are in contact with the pulleys (143) located at the top and bottom of the first limiting block (142) in the first limiting assembly (14).

8. The linear vibrating screen according to claim 4, characterized in that: When the overall length of the fixed sleeve (131) and the first arm (132) in the telescopic assembly (13) is at its minimum, the first spring (135) is in normal condition. When the overall length of the fixed sleeve (131) and the first arm (132) is at its maximum, the connecting block (12) is located below the second transmission belt (17), and the first spring (135) is in a stretched state.

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