Screen cloth auxiliary mounting structure for vibrating screen

Abstract

The utility model relates to a screen cloth auxiliary mounting structure for a vibrating screen. The screen cloth auxiliary mounting structure comprises a base, a screen frame, a screen cloth, a tensioning assembly and a connecting part, a tensioning assembly is arranged on the outer side of the side frame of the screen frame and comprises a transmission gear, a rack and a mounting groove; the transmission gear is rotatably arranged in the mounting groove, a stepping motor is connected to the transmission gear, the transmission gear is meshed with the rack, and the rack is slidably arranged in the mounting groove; the left side edge and the right side edge of the screen are connected with the connecting parts respectively, the connecting parts are connected with racks in the tensioning assemblies, the racks of the connecting parts slide, and the connecting parts move along with the racks. When the stepping motor is started and rotates to enable the meshed racks to generate displacement, and the racks in the tensioning parts located on the left side and the right side of the screen frame slide in the direction away from the screen, due to the fact that the connecting parts and the racks move in the same direction, the screen is tensioned. The vibrating screen has the advantages that abrasion of the screen is reduced, the service life of the screen can be prolonged, and the screen is convenient to mount and dismount.

Description

Technical Field

[0001] The utility model relates to the technical field of vibrating screens, in particular to a screen auxiliary installation structure for a vibrating screen. Background Art

[0002] At present, vibrating screens have a very wide range of applications and are used in the fields of processing manufacturing, construction, chemical engineering, and medicine. They mainly use vibrating screens to classify materials. Multiple layers of screens with different screen hole diameters are set in the vibrating screen, and classification is carried out through vibration. Whether the vibrating screen can effectively separate materials is determined by its main working component, the screen, and the tension degree of the screen directly affects the service life of the screen and will also affect the screening efficiency and productivity of the vibrating screen.

[0003] Since vibrating screens usually work in harsh working conditions such as excessive dust and high-speed vibration, the screens in existing vibrating screens are usually connected to the vibrating screen frame by screws, which is not convenient for the installation and disassembly of the screens; and under the long-term use of the vibrating screen, the screws will become loose, resulting in the screen not being able to be tightened and becoming loose and bent, so the screen is prone to secondary vibration, and the screen will be damaged prematurely under the action of alternating stress, reducing the screening effect of the vibrating screen; at the same time, the inability to tighten the screen will cause the effective screen-passing area of the screen holes to become smaller, causing materials that should pass through the screen to fail to pass through the screen, resulting in a reduction in screening efficiency.

[0004] At present, vibrating screens on the market usually use nuts and screws with hooks to solve the problem of screen tension. Open holes are made on the side of the screen frame, and the screen is connected to the screw through the hook, and the screw is rotated to tighten the screen to both sides. However, this tensioning structure cannot solve the problem of screw loosening at the connection part during long-term vibration, and during the screening process, impurities will enter the gap between the screen and the screw, causing blockage and being difficult to clean.

[0005] Therefore, based on the deficiencies of the existing vibrating screens feedback by customers, the inventor made further improvements according to the proposed defects and deficiencies to overcome the above problems. Summary of the Utility Model

[0006] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a vibrating screen that can extend the service life of the screen and is convenient for the installation and disassembly of the screen.

[0007] The purpose of the utility model is realized through the following technical solutions: A screen auxiliary installation structure for a vibrating screen, including a base and a screen frame; the screen frame is arranged above the base through a support component, and the screen is arranged in the screen frame. Vibration components are arranged on the left and right side frames of the screen frame; it is characterized in that: it further includes a tensioning component and a connecting part.

[0008] Tensioning components are provided on the outer sides of the left and right side frames of the sieve frame. The tensioning components include a transmission gear, a rack, and a mounting groove. The transmission gear is rotatably arranged in the mounting groove. A stepping motor is connected to the transmission gear. The transmission gear meshes with the rack. The rack is slidably arranged in the mounting groove in the left and right directions.

[0009] The left and right side edges of the sieve mesh are respectively connected to the connecting parts. The connecting parts are connected to the racks in the tensioning components. The connecting parts can move in the same direction along with the sliding of the racks.

[0010] When tensioning, first start the stepping motor, which drives the connected transmission gear to rotate. The rotation of the transmission gear causes the engaged rack to generate a displacement in the left and right directions. When the racks in the tensioning parts on the left and right sides of the sieve frame slide in the direction away from the sieve mesh, since the connecting parts move in the same direction as the racks, the sieve mesh is tensioned.

[0011] As a preferred technical solution of the present application, a track is provided in the mounting groove of the tensioning component. The bottom surface of the rack is adapted to the track and slides in the left and right directions on the track. The transmission gear is penetrated by a transmission rod and is rotatably arranged in the mounting groove. The end of the transmission rod extending out of the mounting groove is provided with a stepping motor.

[0012] As a preferred technical solution of the present application, a total of four tensioning components are provided at the four top corners of the sieve frame. The two tensioning components on the same side are symmetrically arranged. The transmission rod penetrates the opposite transmission gears, and the opposite two racks are also connected through a long shaft.

[0013] As a preferred technical solution of the present application, the connecting part includes a connecting long rod and a long splint. The two side edges of the sieve mesh are inserted into the long splint and fixed. An upper hook groove is provided in the upper half of the long splint, which is cooperatively connected with the lower hook groove provided on the connecting long rod. The two ends of the connecting long rod are connected to the long shaft penetrating the rack through connecting blocks.

[0014] As a preferred technical solution of the present application, the sieve mesh is provided with multiple layers of sieve meshes with different sieve hole diameters. Connecting parts are provided at the positions of each layer of sieve mesh to fix the sieve mesh. The two ends of the connecting long rod of the lower layer of sieve mesh extend to the connecting long rod of the first layer of sieve mesh.

[0015] When the stepping motor is started, the first layer of sieve mesh is tensioned by the tensioning components on the left and right sides. The connecting long rod of the lower layer of sieve mesh moves along with the connecting long rod at the position of the first layer of sieve mesh, and the lower layer of sieve mesh is also tensioned synchronously.

[0016] The utility model has the following advantages:

[0017] (1) Reduce the wear of the sieve mesh and make the service life of the sieve mesh longer;

[0018] When the vibrating motor starts to rotate and drive the sieve frame to vibrate, since the material will also vibrate on the sieve mesh for screening, for the current vibrating screen, the sieve mesh is subject to more wear during vibration. The wear of the sieve mesh mainly comes from two aspects. One is the wear caused by the vibration of the material on the sieve mesh to the sieve mesh surface. The other is that since the sieve mesh is connected to the sieve frame by multiple screws on its side, during the long-term vibration process of using the vibrating screen, sometimes the vibration frequency is relatively high, and the screws at the connection part will be worn and fall off due to vibration, resulting in the loosening and bending of the sieve mesh due to the failure of the sieve mesh tension, and thus the sieve mesh will be prematurely damaged under the action of alternating stress, reducing the screening effect of the vibrating screen; This solution designs a tensioning component. Through the transmission structure of the meshing of the gear and the rack, using the stepping motor as the driving force, the rotation of the gear is converted into the linear motion of the rack. A long shaft is arranged on the rack and connected to the connecting long rod. At the same time, a long clamping plate is provided to clamp and fix the sieve mesh. By installing the long clamping plate in cooperation with the connecting long rod, the linear motion of the rack is converted into the linear motion of the connecting long rod, thereby driving the sieve mesh to move and making it tensioned, reducing the wear of the sieve mesh; The sieve mesh in this solution is not installed on the sieve frame with screws, reducing the failure of the sieve mesh tension caused by vibration, thereby reducing the wear of the sieve mesh;

[0019] (2) Facilitate disassembly and installation;

[0020] For the current vibrating screen, the sieve mesh is first inserted into the clamping plate, and then the clamping plate is fixed on the side plate of the sieve frame with multiple screws. It is not very convenient when installing and disassembling and replacing the sieve mesh. During vibration, impurities may also enter the screw gaps, which is not convenient for cleaning; The long clamping plate structure designed in this solution only needs to insert the sieve mesh into the groove of the long clamping plate and fix the sieve mesh with screws on the long clamping plate. Compared with the installation method of the existing sieve mesh, the installation method of this solution is more convenient and also more convenient for cleaning;

[0021] (3) Effectively avoid impurities from entering the tensioning component;

[0022] This solution sets the tensioning component outside the sieve mesh. By opening through holes on the front plate and the rear plate of the sieve frame, the long shaft of the connecting long rod and the rack is connected through the through holes. When the vibrating sieve frame is screening, impurities in the sand and gravel will not enter the tensioning component, so as to avoid damage. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of the first perspective of the present utility model;

[0024] Figure 2 It is a schematic structural diagram of the second perspective of the present utility model;

[0025] Figure 3 It is a schematic structural diagram of the present utility model after installing the tensioning component on the sieve mesh;

[0026] Figure 4 This is a schematic structural diagram of the tensioning component of the present utility model after being connected to the connecting part;

[0027] Figure 5 This is a schematic structural diagram of the tensioning component of the present utility model;

[0028] In the figure: 101 - base, 102 - sieve frame, 103 - sieve mesh, 104 - spring A, 105 - mounting seat, 106 - feed inlet, 107 - discharge outlet, 108 - motor mounting plate, 109 - vibration motor, 112 - motor protective cover, 113 - wire mesh frame;

[0029] 301 - long splint, 302 - upper hook groove, 303 - lower hook groove, 304 - transmission gear, 305 - rack, 306 - mounting groove, 307 - track, 308 - mounting bracket, 309 - transmission rod, 310 - stepper motor, 311 - long shaft, 312 - connecting long rod. Specific embodiments

[0030] The following further describes the present utility model with reference to the accompanying drawings, but the protection scope of the present utility model is not limited to the following.

[0031] It should be noted that the orientation or positional relationship indicated by "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the invention product is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0032] It should be noted that, without conflict, the embodiments in the present utility model and the features and technical solutions in the embodiments can be combined with each other.

[0033] Therefore, based on the above problems, refer to Figure 1 , the present utility model proposes a screen auxiliary installation structure for a vibrating screen to solve the problems.

[0034] (Embodiment 1)

[0035] Refer to Figures 1 - 5 , a screen auxiliary installation structure for a vibrating screen proposed in this embodiment includes a base 101, a sieve frame 102, a sieve mesh 103, a tensioning component, a connecting part, a supporting component, and a vibrating component;

[0036] Among them, refer to Figure 1 , the base 101 is horizontally placed on the ground, and a supporting component and a sieve frame 102 are arranged on the base 101;

[0037] Among them, referring to Figure 1 , the support assembly includes spring A1044 and mounting seat 105. One end of spring A1044 is connected to the base 101, and the other end is connected to the mounting seat 105. The mounting seat 105 is fixedly connected to the sieve frame 102, and the sieve frame 102 is arranged on the base 101 through the support assembly;

[0038] Among them, referring to Figure 1 and Figure 2 , the sieve mesh 103 is arranged in the sieve frame 102. A feed inlet 106 and a discharge outlet 107 are respectively arranged in front of and behind the sieve frame 102. Motor mounting plates 108 are vertically upwardly arranged at the top ends of the left and right side plates of the sieve frame 102, and a vibration assembly is mounted on the motor mounting plates 108;

[0039] Among them, referring to Figure 3 and Figure 4 , the connecting part includes a long splint 301, an upper hook groove 302, and a connecting long rod 312; the left and right sides of the sieve mesh 103 are clamped and fixed by a long splint 301, and an upper hook groove 302 is opened on the long splint 301;

[0040] Among them, referring to Figure 1 , the vibration assembly includes a vibration motor 109, an eccentric block, and a connecting shaft; the whole vibration assembly is covered by a motor protective cover 112 to prevent impurities and dust from damaging the vibration motor 109;

[0041] Among them, referring to Figure 5 , the tensioning assembly includes a transmission gear 304, a rack 305, and a mounting groove 306; a track 307 is arranged on the inner bottom surface of the mounting groove 306, the bottom surface of the rack 305 is adapted to the track 307 and the rack 305 can slide along the track 307; the transmission gear 304 is penetrated by a transmission rod 309 and is rotatably arranged in the mounting groove 306, and the upper surface of the rack 305 meshes with the transmission gear 304; a stepping motor 310 is arranged at the end of the transmission rod 309 extending out of the mounting groove 306.

[0042] Among them, referring to Figure 2 and Figure 3 , four tensioning assemblies are respectively arranged at the four top corner positions of the sieve frame 102. Between two tensioning assemblies on the same side, the two opposite transmission gears 304 are connected by a transmission rod 309, and at the same time, the two opposite racks 305 are also connected by a long shaft 311;

[0043] Among them, referring to Figure 4 , a lower hook groove 303 is opened on the connecting long rod 312 and is adaptively installed with the upper hook groove 302 of the long splint 301. The two ends of the connecting long rod 312 are respectively connected to the ends of the long shaft 311 of the rack 305 through connecting blocks.

[0044] During operation, first insert both sides of the screen mesh 103 into the long clamping plates 301. The long clamping plates 301 are adaptively installed with the connecting long rod 312. Start the stepping motor 310, which drives the transmission gear 304 to rotate. When the transmission gear 304 rotates, it drives the rack 305 engaged with it to slide on the track 307. When the racks 305 in the tensioning components on the left and right side plates of the screen frame 102 both slide away from the screen mesh 103, since the connecting long rod 312 is connected to the long shaft 311 passing through the rack 305, the connecting long rod 312 also slides away from the screen mesh 103, thus tensioning the screen mesh 103. After tensioning, start the vibration motor 109, and the vibration component drives the screen frame 102 to vibrate through the polarization force for screening.

[0045] This solution designs a vibrating screen that can moderately tension the screen mesh 103. Currently, the screen mesh 103 of existing vibrating screens is usually connected to the screen frame 102 by screws. However, during vibration, sometimes the vibration frequency is relatively high. After long-term use of the machine, the connected screws may become loose or worn due to vibration, resulting in the failure of the screen mesh 103 to be tensioned, and causing greater wear on the screen mesh 103 when materials are vibrationally screened on the screen mesh 103. Existing vibrating screens also have a tensioning structure to tension the screen mesh 103. Usually, holes are opened at the position of the screen mesh 103 on the side plates, and a combination of hooks, screws, nuts, etc. is set up to tension the screen mesh 103. However, on the one hand, it is easy for impurities such as sand and gravel to enter the tensioning component, causing blockage. On the other hand, during the long-term vibration process, the connection points of the tensioning structure may become loose or worn, so it cannot play a role in tensioning the screen mesh 103. The tensioning component adopted in this solution uses the cooperation of a gear and a rack 305. By using a stepping motor 310 to drive the gear to rotate, the rack 305 engaged with it moves linearly, driving the connected long shaft 311 to move linearly - thus enabling the long rod connected to the screen mesh 103 to move linearly, tensioning the screen mesh 103. At the same time, the tensioning component is arranged outside the screen frame 102 to prevent impurities from entering the tensioning component when the screen frame 102 vibrates. Compared with the traditional tensioning structure, the tensioning component in this solution removes the screw connection between the screen mesh 103 and the side plate, and uses the long clamping plates 301 and the mutually cooperating hook grooves to fix the screen mesh 103, thereby reducing the wear at the connection position during vibration, making the service life of the screen mesh 103 longer, and also facilitating the disassembly and assembly of the screen mesh 103.

[0046] In this embodiment, refer to Figure 1 , for the design of the base 101, the base 101 is a rectangular frame, and four support feet are respectively vertically downward arranged at the four top corners of the frame. The base 101 is horizontally arranged on the ground through the four support feet.

[0047] In this embodiment, refer to Figure 1 and Figure 2, for the design of the support assembly, two support assemblies are set on the outer sides of the left and right side plates of the screen frame 102, and the support assemblies on the left and right sides are symmetrically arranged - that is, a total of four support assemblies are symmetrically arranged on the base 101 in pairs, and one support assembly includes three springs A1044 as support feet and two mounting seats 105. The three springs A1044 are arranged vertically and side by side on the base 101, one end of the spring A1044 is connected to the upper surface of the base 101, and the other end is connected to the bottom surface of the two mounting seats 105; the mounting seat 105 frame is a right-angled triangle frame, short The right-angle end face is connected to a mounting plate screw, so that the spring A1044 is connected to the mounting seat 105 through the mounting plate - that is, the mounting seat 105 is arranged above the spring A1044, and the long right-angle end face of the mounting seat 105 is connected to the side plate screw of the screen frame 102. When the vibration motor 109 located at the top of the screen frame 102 starts to drive the screen frame 102 to vibrate, the support assembly plays a role in supporting the entire screen frame 102, and the spring A1044 is used as the support foot of the screen frame 102, which can support and fix the screen frame 102 without affecting the vibration of the screen frame 102.

[0048] In this embodiment, refer to Figure 2 , for the screen frame 102, the screen frame 102 includes a front plate, a rear plate, a left plate, a right plate, a discharge port 107 and a feed port 106; the left and right side plates are fixedly connected to the corresponding support components, and the left and right side plates are connected to each other through multiple grids 113. The grids 113 are long cylindrical and play the role of supporting and stabilizing the screen frame 102; one end of the front plate is connected to the left plate, and the other end is connected to the right plate. The height of the front plate is lower than the height of the left and right side plates. A feed port is provided above the front plate. The feed port 106 is connected to one end of the screen 103, and the material to be screened falls onto the screen 103 from the feed port 106. A rectangular slot is opened horizontally on the rear plate, and the slot is located opposite to the other end of the screen 103. At the same time, a discharge port 107 is set at the slot; when the vibration motor 109 rotates to drive the screen frame 102 to vibrate, the front plate and the rear plate of the screen frame 102 are relatively sealed and only the discharge port 107 and the feed port 106 are opened, which is convenient for screening and sending materials and avoids spilling of materials.

[0049] In this embodiment, refer to Figure 2, for the vibration assembly, the vibration assembly includes a vibration motor 109, an eccentric block and a connecting shaft; at the top ends of the two side plates of the sieve frame 102, motor mounting plates 108 are respectively fixedly connected. The motor mounting plates 108 are vertically arranged on the side plates and the motor mounting plates 108 are trapezoidal. Mounting holes are provided on the motor mounting plates 108 for mounting the vibration motor 109. An eccentric block is arranged on the vibration motor 109. The vibration motors 109 on the left side plate and the right side plate are connected by a connecting shaft. After the vibration assembly is installed, a motor protective cover 112 is buckled outside the vibration motor 109. The protective cover is connected to the motor mounting plate 108 by screws to prevent impurities and dust from entering the vibration motor 109 and causing damage to the vibration motor 109.

[0050] In this embodiment, referring to Figure 2 and Figure 3 , for the design of the sieve mesh 103, a plurality of sieve holes are provided on the sieve mesh 103. The sieve mesh 103 is arranged inside the sieve frame 102. The two side edges of the sieve mesh 103 are fixed in the sieve frame 102 by a long clamping plate 301. The lower half of the long clamping plate 301 is provided with a long groove. The width of the groove is adapted to the thickness of the sieve mesh 103. The side edge of the sieve mesh 103 is inserted into the long groove. Above the long groove of the long clamping plate 301, an upper hook groove 302 is vertically extended. The upper hook groove 302 is bent into an inverted L shape. The long clamping plate 301 is connected to the tensioning assembly through the upper hook groove 302 - that is, the sieve mesh 103 is connected to the tensioning assembly.

[0051] In this embodiment, referring to Figures 3 - 5 , for the tensioning assembly, four tensioning assemblies are provided at positions of the sieve frame 102 close to the four top corners and are respectively installed on the outer sides of the left and right side plates of the sieve frame 102 through mounting brackets 308; the installation groove 306 is rectangular. A track 307 is provided on the bottom surface of the installation groove 306. The rack 305 is concave. The concave bottom thereof is adapted to the track 307 and the rack 305 can slide along the track 307 on the track 307. The upper surface of the rack 305 has a toothed part which meshes with the tooth edge of the transmission gear 304; the transmission gear 304 is rotatably arranged in the installation groove 306 and is located above the rack 305. A transmission rod 309 passes through the transmission gear 304 and one end of the transmission rod 309 extends out of the through hole on the back surface of the installation groove 306 and then the extended end is connected to a stepping motor 310, and the other end is connected to the transmission rod 309 on the transmission gear 304 in the tensioning assembly which is symmetrically arranged at the same side plate position; through holes are provided on the rack 305. A long shaft 311 passes through the through holes on the rack 305 and connects the two racks 305 which are symmetric on the same side plate.

[0052] In this embodiment, referring to Figure 4, for the connecting long rod 312, a lower hook groove 303 is provided on the connecting long rod 312. The lower hook groove 303 is in the shape of an inverted character, and its groove is adapted to the upper hook groove 302 of the long clamping plate 301 of the fixed screen 103. The connecting long rod 312 is arranged at the inner wall positions of the left and right side plates of the screen frame 102, above the screen 103. The screen 103 is fixed inside the screen frame 102 through the cooperation of the long clamping plate 301 and the connecting long rod 312; a window is opened on the back of the installation groove 306. The position of the window is opposite to the rack 305. The end of the long shaft 311 passing through the rack 305 extends out of the window, and a connecting block is horizontally arranged at the end to connect with the end of the connecting long rod 312.

[0053] Furthermore, in order to prevent impurities from accidentally vibrating into the tensioning assembly during vibration, the tensioning assembly is arranged outside the screen frame 102. The long shaft 311 of the rack 305 in the tensioning assembly is connected to the connecting long rod 312 inside the screen frame 102 by opening through holes at corresponding positions on the front plate and the rear plate.

[0054] When the stepping motor 310 is started, the transmission gear 304 starts to rotate, so that the rack 305 engaged with the transmission gear 304 slides on the track 307. When the rack 305 on the left side plate slides away from the screen frame 102, the long shaft 311 connecting the rack 305 also moves in the direction away from the screen frame 102, causing the connecting long rod 312 connected to the long shaft 311 through the connecting block to move in the same direction. At the same time, the rack 305 on the right side plate also slides away from the screen frame 102, so that the two sides of the screen 103 can be subjected to opposite forces, thereby tensioning the screen 103.

[0055] (Embodiment 2)

[0056] On the basis of Embodiment 1, inside the screen frame 102, the screen 103 is arranged in multiple layers, and the screen hole diameters of each layer of the screen 103 are different. When screening the raw materials, vibration causes the materials smaller than the screen hole diameter to fall, and the materials larger than the screen hole diameter are screened out. Arranging the screen 103 in multiple layers is more conducive to screening; the left and right sides of each layer of the screen 103 are fixed by the long clamping plate 301, and at the same time, the connecting long rod 312 is arranged to be adapted and installed with the long clamping plate 301. The two end heads of the connecting long rod 312 extend out and are connected upward to the connecting long rod 312 of the first layer of the screen 103. When the stepping motor 310 is started, the displacement of the connecting long rods 312 on the left and right sides of the first layer of the screen 103 tensions the first layer of the screen 103. At the same time, the connecting long rods 312 on the left and right sides of the following layers of the screen 103 also move, so that the multiple layers of the screen 103 are tensioned simultaneously, making the tensioning of the screen 103 more convenient and fast, and the installation and disassembly of the screen 103 are also very convenient.

[0057] The utility model relates to a vibrating screen capable of moderately tensioning a screen mesh 103. The tensioning of the screen mesh 103 is realized by arranging a tensioning component outside the screen frame 102. First, the screen mesh 103 is inserted into the long groove of the long clamping plate 301, and then the upper hook groove 302 in the shape of an inverted L on the upper half of the long clamping plate 301 is matched and installed with the lower hook groove 303 on the connecting long rod 312. Then, the stepping motor 310 is started, so that the driving gear 304 in the tensioning component rotates. Through the meshing transmission of the driving gear 304 and the rack 305, the rotation is converted into a linear motion, thereby driving the long shaft 311 connected to the rack 305 to move. Also, since the connecting long rod 312 is connected to the long shaft 311, the movement of the connecting long rod 312 drives the screen mesh 103 to be tensioned. And the tensioning components on the left and right side plates of the screen frame 102 rotate in the opposite direction when the driving gear 304 rotates at the same time, so as to realize the tensioning of the screen mesh 103.

[0058] Currently, the screen mesh 103 of a vibrating screen usually needs to be fixedly connected to the screen frame 102 through screws. However, when the vibrating screen vibrates, sometimes the vibration frequency is relatively high. After the vibrating screen is used for a long time, the screws at the connection part become loose or worn due to vibration, resulting in the failure of the tensioning of the screen mesh 103. The non-tensioned screen mesh 103 will cause greater wear on the screen mesh 103 when the material passes through the vibrating screen for screening, greatly reducing the service life of the screen mesh 103. At the same time, the existing vibrating screen is provided with a tensioning structure to tension the screen mesh 103. Usually, a combination of a hook and screw nuts is used to tension the screen mesh 103 from the side, but it is easy for impurities such as sand and gravel to enter the tensioning component during vibration, causing blockage. Second, during the long-term vibration process, the screw connection part between the screen mesh 103 and the screen frame 102 and the connection part of the tensioning structure become loose or worn, resulting in the failure of tensioning. The tensioning component designed in this scheme adopts a transmission structure in which the driving gear 304 meshes with the rack 305, converts the rotation of the gear into a linear motion, and then drives the connected long shaft 311 to perform a linear motion. The screen mesh 103 is tensioned through the linear motion of the connecting long rod 312. The tensioning component is arranged outside the screen frame 102, and only the long shaft 311 and the connecting long rod 312 are used to tension the screen mesh 103, which can avoid impurities entering the tensioning component during vibration and causing blockage and damage. This scheme is provided with a long clamping plate 301 and a connecting long rod 312. The two sides of the screen mesh 103 are fixed by the long clamping plate 301. The screen mesh 103 is not directly connected to the screen frame 102. The long clamping plate 301 is connected to the connecting long rod 312, and the two ends of the connecting long rod 312 are directly connected to the tensioning component through connecting blocks. When the vibrating screen starts to vibrate, the problem that the tensioning of the screen mesh 103 fails due to loosening or wear at the connection part will not occur, thereby improving the service life of the screen mesh 103.

[0059] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A screen auxiliary installation structure for a vibrating screen, comprising a base (101) and a screen frame (102); the screen frame (102) is arranged above the base (101) through a support assembly, and a screen (103) is arranged in the screen frame (102), and vibration assemblies are arranged on the left and right side frames of the screen frame (102); characterized in that: It also includes a tensioning assembly and a connecting part; Tensioning assemblies are provided on both the left and right sides of the sieve frame (102). The tensioning assembly includes a transmission gear (304), a rack (305), and a mounting groove (306). The transmission gear (304) is rotatably arranged in the mounting groove (306). A stepping motor (310) is connected to the transmission gear (304). The transmission gear (304) meshes with the rack (305). The rack (305) is slidably arranged in the mounting groove (306) in the left-right direction; The left and right side edges of the sieve mesh (103) are respectively connected to the connecting part. The connecting part is connected to the rack (305) in the tensioning assembly. The connecting part can move in the same direction as the sliding of the rack (305).

2. The screen auxiliary installation structure for a vibrating screen according to claim 1, characterized in that: A track (307) is arranged in the mounting groove (306) of the tensioning assembly. The bottom surface of the rack (305) is adapted to the track (307) and slides left and right on the track (307). The transmission gear (304) is penetrated by a transmission rod (309) and rotatably arranged in the mounting groove (306). The end of the transmission rod (309) extending out of the mounting groove (306) is provided with a stepping motor (310).

3. The auxiliary screen installation structure for a vibrating screen according to claim 2, characterized in that: The tensioning assemblies are arranged at the four top corners of the sieve frame (102). The tensioning assemblies on the same side are symmetrically arranged. The transmission rod (309) penetrates the opposite transmission gears (304), and the opposite two racks (305) are also connected through a long shaft (311).

4. The auxiliary screen installation structure for a vibrating screen according to claim 1, wherein: The connecting part includes a connecting long rod (312) and a long clamping plate (301). The two side edges of the sieve mesh (103) are inserted into the long clamping plate (301) and fixed. An upper hook groove (302) is arranged in the upper half of the long clamping plate (301), which is cooperatively connected with a lower hook groove (303) arranged on the connecting long rod (312). The two ends of the connecting long rod (312) are connected to the long shaft (311) penetrating the rack (305) through connecting blocks.

5. The auxiliary screen mounting structure for a vibrating screen according to claim 4, characterized in that: The sieve mesh (103) is provided as multiple layers of sieve meshes (103) with different sieve hole diameters. Connecting parts are arranged at the positions of each layer of sieve mesh (103) to fix the sieve mesh (103). The ends of the connecting long rods (312) at both ends of the lower layer of sieve mesh (103) extend to the connecting long rods (312) of the first layer of sieve mesh (103).

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