Vibrating screen with higher screening efficiency

Abstract

The utility model relates to a vibrating screen with higher screening efficiency. The vibrating screen comprises a base, a screen frame, a transmission crankshaft, a tensioning assembly and a jack assembly, the screen frame is arranged on the base through a supporting assembly, a screen is arranged in the screen frame, and the transmission crankshaft is rotationally connected with the vibration motors of the left side frame and the right side frame of the screen frame. The tensioning assembly is of a transmission gear rack structure. The screen frame is jacked through a piston rod in the jack assembly; when the racks on the two sides slide in the direction away from the screen, the screen is tensioned due to the fact that the connecting parts and the racks move in the same direction, then the vibration motors are started, and the transmission crankshafts start to rotate, namely the vibration motors on the two sides are synchronous; when the angle of the vibrating screen is adjusted, the jack assembly is pressed to enable the piston rod to jack the screen frame, then the cushion block is installed to fix the angle, and pressure is released to enable the piston rod to descend. The vibrating screen has the advantages of being more synchronous in vibration, convenient to mount and dismount and higher in screening efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration screening, in particular to a vibrating screen with higher screening efficiency. Background Art

[0002] At present, in the construction field, different sizes of sand and gravel are needed to prepare concrete or cement mortar. Before using the sand and gravel, it is necessary to screen them. The diameters of the original materials are usually different. In the industrial aspect, it is necessary to classify them according to the diameter size. To achieve this goal, a vibrating screen is usually used at present; vibrating screens are widely used in industries such as energy, metallurgy, ceramics, building materials, and chemical engineering, mainly for classifying materials. Different layers of filter screens with different screen holes are set in the vibrating screen, and the materials are classified by vibration. The existing vibrating screens are usually straight screens with slopes. The screen plate is also called a perforated plate, which uses ordinary wire meshes and has good wear resistance. It is generally installed on steel wire springs and screens the materials through the internal mesh holes. The vibrating motor drives the screen surface to vibrate up and down to screen the materials to be classified.

[0003] The current vibrating screens have the following problems: First, since the vibrating screen rotates the vibrating motors arranged on the left and right sides of the screen frame, drives the eccentric blocks to generate exciting forces to cause vibration, the non-synchronization of the vibrating motors will cause the amplitude of the device screening to be small, the screening efficiency to be low, and the device to tip over, causing potential safety hazards; second, since the screen meshes in the current vibrating screens are fixed by screws, on the one hand, it is not convenient for installation and disassembly, and on the other hand, after long-term vibration, the screws at the joints will become loose, resulting in the failure of the screen mesh tension. Under the action of alternating stress, the screen mesh will be damaged prematurely, resulting in a reduction in screening efficiency; and because the types of materials to be screened by the vibrating screen are diverse, and their weights and diameters are different, the traditional vibrating screening production line has a large number of equipment, a relatively high input cost for the production line, and a relatively complex process; resulting in a high failure rate, high labor intensity of workers, excessive energy consumption, and an unsatisfactory sand output rate of the production line, and a relatively low screening efficiency.

[0004] 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

[0005] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a vibrating screen with more synchronous vibration, convenient installation and disassembly, and higher screening efficiency.

[0006] The purpose of the utility model is achieved through the following technical solutions: a vibrating screen with higher screening efficiency, comprising a base and a screen frame; the screen frame is arranged on the base through a support assembly and a screen is arranged inside the screen frame, two sets of vibration motors are respectively arranged on the top of the left and right side frames of the screen frame, and the vibration motors are provided with eccentric blocks; the utility model is characterized in that it also includes:

[0007] Synchronous rotation structure I: The synchronous rotation structure connects two sets of vibration motors, allowing the two sets of vibration motors to rotate synchronously, thereby increasing the amplitude;

[0008] Screen auxiliary installation structure II, the screen can be detachably installed on the screen frame through the screen auxiliary installation structure, which is convenient for screen removal, installation and replacement;

[0009] Angle adjustment mechanism III: An angle adjustment mechanism is provided between the screen frame and the base; the angles of the screen frame and screen mesh are adjusted through the angle adjustment mechanism;

[0010] The four corners of the base are provided with rectangular feet, which can fix and support the vibrating screen horizontally on the ground.

[0011] The front and rear ends of the screen frame are respectively provided with a feed port and a discharge port, and the material placement surfaces of the feed port and the discharge port are inclined downward to dock with the screen, so as to facilitate the transportation of materials on the screen.

[0012] As the preferred technical solution of the present application, connecting blocks are mounted on the transmission crankshafts between the vibration motors, and the connecting blocks are laterally connected to each other. Adjustable eccentric blocks are symmetrically arranged in the middle of each transmission crankshaft, and the adjustable eccentric blocks are connected by connecting rods to make the vibration of the device more synchronous.

[0013] As a preferred technical solution of the present application, the vibration motors are symmetrically arranged on the left and right sides of the screen frame, and the two vibration motors on the same side are arranged in high and low positions.

[0014] As a preferred technical solution of the present application, a track is provided on the mounting groove in the screen auxiliary mounting structure II, the rack is adapted to slide on the track, the transmission gear is passed through by the transmission rod and is provided above the rack, and a stepping motor is provided at the end of the transmission rod;

[0015] Tensioning assemblies are respectively provided at the top corners of the left and right side frames of the screen frame. In the tensioning assembly on the same side, a transmission rod penetrates the opposite transmission gear and the two opposite racks are also connected by a long shaft.

[0016] As the preferred technical solution of this application, it also includes a connecting part; the connecting part includes a connecting long rod and a long splint; the two sides of the screen are inserted into the long splint and fixed, the long splint is cooperatively connected to the connecting long rod, and the two end ends of the connecting long rod are connected to the long axis passing through the rack through a connecting block.

[0017] As a preferred technical solution of the present application, the sieve is provided with multiple layers of sieves with different sieve hole diameters. Connecting parts are arranged at each layer of sieve position to fix the sieve. The ends of the connecting long rods at both ends of the lower layer of sieve extend to the connecting long rods of the first layer of sieve;

[0018] When the stepping motor is started, the first layer of sieve is tensioned by the tensioning components on the left and right sides. The connecting long rods of the lower layer of sieve move along with the connecting long rods at the position of the first layer of sieve, and the lower layer of sieve is also tensioned synchronously.

[0019] As a preferred technical solution of the present application, it further includes a cushion block assembly; the cushion block assembly includes a mounting frame B and a screw; the mounting frame B is arranged on the base and the mounting frame B penetrates through the movable screw, and at the same time, a locking nut is provided to lock the screw;

[0020] When the sieve frame is jacked up, rotate the screw to make the screw displace upward until there is a certain space between the support assembly and the upper surface of the mounting frame B for installing the cushion block.

[0021] As a preferred technical solution of the present application, it further includes a limiting part; the limiting part includes a bottom frame, a spring B, and a spring column; the spring B is arranged on the bottom frame below the mounting frame B, and the other end thereof is connected to the spring column. The bottom frame is provided with a support column upward and the support column penetrates through the mounting frame B. A limiting cover is arranged at the protruding end of the support column, and the limiting cover can rotate around the support column.

[0022] The utility model has the following advantages:

[0023] (1) Make the vibration more synchronous and the device work more smoothly and safely;

[0024] When arranging the vibration components of the existing vibrating screen, usually one vibration motor is set on each side of the screening frame, and force is applied from both sides to drive the sieve frame to vibrate. A connecting cylinder is used to horizontally connect the vibration motors on both sides. However, the connecting cylinder cannot rotate along with the vibration motor when it rotates, and cannot ensure the synchronization of the rotation of the left and right motors; due to the non-synchronization of the vibration motors on the left and right sides, there will be a difference in the magnitude of the exciting forces generated on the left and right sides - the amplitude of the vibrating screen is relatively small, resulting in the material shifting to one side during the vibration screening of the vibrating screen, which is not conducive to screening and may even damage the device and cause the device to tip over; in this solution, a transmission crankshaft is arranged between the vibration motors on the left and right sides of the sieve frame for connection. The transmission crankshaft is a solid transmission crankshaft and can rotate along with the vibration motor when it rotates. While playing a supporting role, it can ensure the synchronization of the motor rotation, thus ensuring the stable operation of the device. At the same time, connecting rods are also arranged on the eccentric blocks of the vibration motors on both sides to be connected to each other to ensure the synchronization of the exciting forces and enhance the stability of the device;

[0025] (2) Higher screening efficiency;

[0026] Currently, the vibrating motors of vibrating screens are usually arranged in a group of two on each of the left and right sides, horizontally at the same height. During operation, they move in an elliptical trajectory. In this solution, the vibrating motors on the left and right sides of the screen frame are arranged at different heights, forming an inclined and larger elliptical motion trajectory. The exciting force generated by their rotation is greater, and the screening efficiency is higher, thus increasing the output. At the same time, in the tensioning component designed in this solution, by fitting and installing the long clamping plate 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 screen mesh to move and making it tensioned, so that the screen mesh will not be damaged prematurely, resulting in a reduction in screening efficiency.

[0027] (3) Facilitate disassembly and installation;

[0028] For the current vibrating screen, the screen mesh is first inserted into the clamping plate, and then multiple screws are used to fix the clamping plate on the side plate of the screen frame. It is not very convenient to install and disassemble and replace the screen mesh. During the vibration process, impurities may also enter the screw gaps, which is not convenient for cleaning. In the long clamping plate structure designed in this solution, only the screen mesh needs to be inserted into the groove of the long clamping plate, and the screen mesh is fixed on the long clamping plate with screws. Compared with the existing screen mesh installation method, the installation method of this solution is more convenient, and it is also more convenient for cleaning. At the same time, the cushion block component set in this solution is an assembled cushion block. In this way, it is more convenient to disassemble and install the cushion block under the vibrating screen, so that it is more convenient to adjust the inclination angle of the adjusting device. Description of the Drawings

[0029] Figure 1 Structural schematic diagram of the first perspective of the present utility model;

[0030] Figure 2 Structural schematic diagram of the side view perspective of the present utility model;

[0031] Figure 3 Structural schematic diagram of the jacking component of the present utility model;

[0032] Figure 4 Structural schematic diagram of the first perspective of the cushion block component of the present utility model;

[0033] Figure 5 Structural schematic diagram of the side view perspective of the cushion block component of the present utility model;

[0034] Figure 6 Structural schematic diagram of the half-sectional view of the cushion block component of the present utility model;

[0035] Figure 7 Structural schematic diagram of the top view angle after removing the screen mesh of the present utility model;

[0036] Figure 8 Structural schematic diagram of the top view perspective of the synchronous rotation structure of the present utility model;

[0037] Figure 9 This is a schematic diagram of the structure of the utility model after the screen is installed in the auxiliary installation structure of the screen;

[0038] Figure 10 This is a schematic structural diagram of a half-section view of a cushion block assembly of the present invention;

[0039] Figure 11 This is a schematic structural diagram of a half-section view of a cushion block assembly of the present invention;

[0040] In the figure: 101-base, 102-screen frame, 103-screen, 104-spring A, 105-mounting seat, 106-feed port, 107-discharge port, 108-motor mounting plate, 109-vibration motor, 110-fixed eccentric block, 111-adjustable eccentric block, 112-motor protective cover, 113-grid frame;

[0041] 201- transmission crankshaft, 202- connecting rod, 203- connecting block;

[0042] 301-long splint, 302-upper hook groove, 303-lower hook groove, 304-transmission gear, 305-rack, 306-mounting groove, 307-track, 308-mounting frame, 309-transmission rod, 310-stepping motor, 311-long shaft, 312-connecting long rod;

[0043] 401- chassis, 402- mounting plate, 403- mounting frame B, 404- screw, 405- pad A, 406- pad B, 407- base, 408- spring B, 409- spring column, 410- limit cover, 411- handle, 412- cylinder, 413- piston rod, 414- support upper plate, 415- support lower plate, 416- spring C, 417- oil drain valve, 418- locking nut. DETAILED DESCRIPTION

[0044] The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0045] It should be noted that the directions or positional relationships indicated by “left”, “right”, etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the invented product is usually placed when in use, or are the directions or positional relationships commonly understood by those skilled in the art. Such terms are only used to facilitate the description of the present invention and simplify the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0046] 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.

[0047] Therefore, based on the above problems, referring to Figure 1 , the present utility model proposes a vibrating screen with higher screening efficiency to solve the problems.

[0048] (Embodiment 1)

[0049] Referring to Figures 1 to 11 , a vibrating screen with higher screening efficiency proposed in this implementation scheme includes a base 101, a screen mesh 103, a transmission crankshaft 201, a vibration assembly, a tensioning assembly, a connecting part, a jack assembly, and a cushion block assembly;

[0050] Among them, referring to Figure 1 , the base 101 is horizontally placed on the ground, and a support assembly and a screen frame 102 are arranged on the base 101;

[0051] Among them, referring to Figures 1 - 2 , the support assembly includes a spring A 104 and a mounting seat 105. One end of the spring A 104 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 screen frame 102, and the screen frame 102 is arranged on the base 101 through the support assembly;

[0052] Among them, referring to Figure 1 , the screen mesh 103 is arranged in the screen frame 102. A feed inlet 106 and a discharge outlet 107 are respectively arranged in front of and behind the screen frame 102. Motor mounting plates 108 are vertically upward arranged at the top ends on the left and right sides of the screen frame 102, and a vibration assembly is mounted on the motor mounting plates 108;

[0053] Among them, referring to Figure 7 and Figure 8 , the vibration assembly includes vibration motors 109, eccentric blocks, and a transmission crankshaft 201; Two vibration motors 109 are arranged on the motor mounting plates 108. The vibration motors 109 are double-output shaft motors. Eccentric blocks are sleeved on both ends of the double-output shafts of the vibration motors 109, and the transmission crankshaft 201 is connected to two groups of vibration motors 109 located on the left and right sides of the screen frame 102;

[0054] Among them, referring to Figure 7 and Figure 8 , connecting rods 202 are arranged on the symmetrically arranged eccentric blocks for connection, so that the vibration motors 109 vibrate synchronously;

[0055] Among them, referring to Figure 9 and Figure 10, the connecting part includes a long splint 301 and a connecting long rod 312; the left and right sides of the screen 103 are clamped and fixed by a long splint 301, an upper hook groove 302 is formed on the long splint 301, a lower hook groove 303 is formed on the connecting long rod 312, and it 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 axis 311 of the rack 305 through connecting blocks 203;

[0056] Among them, refer to Figure 10 , the tensioning assembly includes a transmission gear 304, a rack 305, and an installation groove 306; a track 307 is provided on the inner bottom surface of the installation 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 on the track 307; the transmission gear 304 is penetrated by a transmission rod 309 and is rotatably arranged in the installation groove 306, and the upper surface of the rack 305 meshes with the transmission gear 304; a stepping motor 310 is provided at the end of the transmission rod 309 extending out of the installation groove 306;

[0057] Among them, refer to Figure 9 , four tensioning assemblies are respectively arranged at the four vertex positions of the screen frame 102. Between the 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 axis 311;

[0058] Among them, refer to Figures 4 to 6 , the cushion block assembly includes an installation frame B403, a screw rod 404, a cushion block, and a limiting part; the installation frame B403 is arranged on the base 101, the screw rod 404 penetrates the installation frame B403 and can displace in the up and down direction on the installation frame B403, and the cushion block is placed on the installation frame B403;

[0059] Among them, refer to Figure 6 , the limiting part includes a bottom frame 407, a spring column 409, a spring B408, and a limiting cover 410; an installation hole is formed on the installation frame B403, a pillar penetrates the installation hole and a bottom frame 407 is arranged at the bottom end, the spring B408 is arranged on the bottom frame 407, one end of it is connected to the bottom frame 407, the other end is connected to the spring column 409, the spring column 409 is arranged in the through hole of the installation frame B403 and can stretch up and down in the installation frame B403, and a rotatable limiting cover 410 is sleeved on the top end of the pillar;

[0060] Among them, refer to Figure 3 , the jack assembly includes a chassis 401, a jack, and a handle part 411; long plates are respectively arranged outward on the front left and right sides of the bottom plate of the screen frame 102, the jack assembly is arranged below the long plates, and the handle part 411 is arranged beside the jack, and by pressing the handle part 411, the piston rod 413 of the jack rises.

[0061] During operation, the screen 103 is installed and tensioned before starting the vibration motor 109, and the screen 103 is first inserted into the long splint 301, and the long splint 301 is installed with the connecting long rod 312, and the stepping motor 310 is started to rotate the transmission gear 304, and the transmission gear 304 drives the meshing rack 305 to slide on the track 307. When the racks 305 on the left and right side plates of the screen frame 102 slide in the direction away from the screen 103, since the connecting long rod 312 is connected to the long axis 311 passing through the rack 305, the connecting long rod 312 also slides in the direction away from the screen 103, thereby tensioning the screen 103; then start the vibration motor 109, put the material from the feed port 106, adjust the eccentric block of the vibration assembly to a suitable position, and the rotation of the vibration motor 109 generates centrifugal force to drive the screen frame 102 generates vibration, and the vibration components on the left and right sides of the screen frame 102 are connected through the transmission crankshaft 201 to keep the vibration motor 109 rotating synchronously. The connecting rod 202 set on the eccentric block also ensures the synchronization of vibration, and will not cause the device to overturn due to asynchronous vibration; if it is necessary to change the inclination angle of the device according to material requirements, turn off the vibration motor 109, press the jack component to make the piston rod 413 rise, and press against the long plate of the screen frame 102 to tilt the vibrating screen to a certain angle, then install the pad assembly under the support assembly, turn the screw 404 to make the screw 404 rise to place the pad on the mounting frame B403 and limit the pad through the limit part, and then release the pressure to make the piston rod 413 drop. The pad assembly ensures that the adjustment angle of the vibrating screen remains unchanged, thereby completing the adjustment of the screening angle of the vibrating screen.

[0062] This solution designs a vibrating screen with higher screening efficiency. Since the existing vibrating screens usually connect the vibration motors 109 on the left and right sides with a connecting tube, the connecting tube is a hollow tube and does not rotate with the rotation of the vibration motor 109. It only plays a supporting and connecting role. This design cannot ensure the synchronous rotation of the left and right vibration motors 109, resulting in asynchronous vibration - the screened material tends to one side or the device tilts and overturns; this solution sets a transmission crankshaft 201 between the vibration motors 109 on the left and right sides of the screen frame 102. The transmission crankshaft 201 is a solid transmission crankshaft 201 and can rotate with the rotation of the vibration motor 109 to ensure the synchronization of the motors on both sides, so that the device is more stable during operation. At the same time, a connecting rod 202 is set on the eccentric block. The connecting rod 202 connected on both sides makes the eccentric block move synchronously to ensure that the device will not overturn.

[0063] In the existing vibrating screens, the screen mesh 103 usually has its connecting screws loosened or worn due to vibration after long-term use, resulting in the failure of the screen mesh 103 to be tensioned, and causing greater wear of the screen mesh 103 by the material; the existing vibrating screens usually adopt a combination of opening channels, setting hooks, screw nuts, etc. to tension the screen mesh 103. First, it is easy for impurities such as sand and gravel to enter the tensioning components, causing blockage. Second, during the long-term vibration process, the joints of the tensioning structure are worn, so the tensioning effect on the screen mesh 103 cannot be achieved; the tensioning component of this solution is matched with a gear and rack 305. By driving the gear to rotate by a stepper motor 310, the rack 305 engaged with it moves linearly - thereby causing the long rod connected to the screen mesh 103 to move linearly, tensioning the screen mesh 103. Compared with the traditional tensioning structure, the tensioning component of this solution removes the screw connection between the screen mesh 103 and the side plate, and uses long splints 301 and mutually cooperating hook grooves to fix the screen mesh 103, so that during the vibration process, the wear of the connection position is reduced, the service life of the screen mesh 103 is longer, and it is also convenient to disassemble and assemble the screen mesh 103;

[0064] In the current vibrating screens, the angles of the screen meshes 103 are fixed. However, the materials to be screened usually have different weights and diameters, and it is impossible to screen a variety of different materials. Usually, other models of vibrating screens need to be used or the screen mesh 103 needs to be removed and the position of the screen mesh 103 in the vibrating frame needs to be changed to change the screening angle, which is very inconvenient and time-consuming; in this solution, a jack and a pad component are used to tilt the vibrating screen to adjust the screening angle. After the vibrating screen can be adjusted to the required angle by the jack, the pad component is used to fix the tilted angle; the pad component is arranged below the support component. After the screen frame 102 is lifted upward by the jack, rotate the screw 404 so that the top of the screw 404 is in contact with the bottom of the spring A104 in the support component, then place the pad on the mounting frame B403, and fix the pad through the limiting part to prevent the pad from sliding during vibration, resulting in the device tipping over.

[0065] 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.

[0066] In this embodiment, refer to the figure and Figure 2, for the design of the support components, two support components are arranged on the outer sides of the left and right side plates of the sieve frame 102 respectively. The support components on the left and right sides are symmetrically arranged - that is, a total of four support components are arranged on the base 101 in pairs symmetrically. One support component includes three spring A 104 as feet and two mounting seats 105. The three spring A 104 are arranged vertically and side by side on the base 101. One end of the spring A 104 is connected to the upper surface of the base 101, and the other end is connected to the bottom surfaces of the two mounting seats 105. The frame of the mounting seat 105 is a right-angled triangle frame. The short right-angled end face is screwed to a mounting flat plate, so that the spring A 104 is connected to the mounting seat 105 through the mounting flat plate - that is, the mounting seat 105 is arranged above the spring A 104. The long right-angled end face of the mounting seat 105 is screwed to the side plate of the sieve frame 102. When the vibration motor 109 at the top of the sieve frame 102 starts to drive the sieve frame 102 to vibrate, the support components play a role in supporting the entire sieve frame 102. Using the spring A 104 as the feet of the sieve frame 102 can play a role in supporting and fixing the sieve frame 102 while not affecting the vibration of the sieve frame 102.

[0067] In this embodiment, refer to Figure 1 , for the sieve frame 102, the sieve frame 102 includes a front plate, a rear plate, a left side plate, a right side plate, a discharge port 107 and a feed port 106. The left and right side plates are respectively fixedly connected to the corresponding support components. At the same time, the left and right side plates are connected to each other through a plurality of wire meshes 113. The wire meshes 113 are long cylindrical. The two ends of the front plate are respectively connected to the left side plate and the right side plate, and the height of the front plate is lower than the height of the left and right side plates. A feed port 106 is arranged above the front plate. The feed port is an obliquely downward empty slot. The feed port 106 is connected to one end of the sieve mesh 103. The material to be screened falls on the sieve mesh 103 from the feed port 106. A rectangular slot is transversely opened on the rear plate. The position of the slot is docked with the other end of the sieve mesh 103. At the same time, a discharge port 107 is arranged at the slot. When the vibration motor 109 rotates to drive the sieve frame 102 to vibrate, the sieve frame 102 is relatively sealed and only the discharge port 107 and the feed port 106 are opened, which is convenient for the screening and conveying of materials and avoids the random scattering of materials.

[0068] In this embodiment, refer to Figure 7 and Figure 8, for the vibration assembly, the top parts of the left and right side plates of the sieve frame 102 are respectively fixedly connected to the motor mounting plates 108. Mounting holes are provided on the motor mounting plates 108, and the vibration motors 109 are inserted into the mounting holes on the motor mounting plates 108. Eccentric blocks are connected to the output shafts at both ends of the vibration motors 109; and two transmission crankshafts 201 are respectively connected to four vibration motors 109 that are symmetrically arranged on the motor mounting plates 108 on the left and right sides of the sieve frame 102. The transmission crankshafts 201 can ensure the synchronous rotation of the vibration motors 109 on the left and right sides; the two transmission crankshafts 201 are connected by a connecting block 203, and the connecting block 203 is sleeved on the transmission crankshaft 201; at the same time, the adjustable eccentric block 111 located inside the vibration motor 109 is arranged at a position closer to the inside of the rotating crankshaft (the position sequence on the same axis is vibration motor 109, fixed eccentric block 110, connecting block 203, adjustable eccentric block 111). A connecting rod 202 is arranged on the adjustable eccentric block 111, and the adjustable eccentric blocks 111 on both side plates are connected by the connecting rod 202, so that when rotating, the connecting rod 202 and the connecting block 203 will not collide and interfere with each other.

[0069] Furthermore, for the eccentric blocks, the more the eccentric blocks on the same vibration motor 109 overlap each other, the greater the exciting force; the two eccentric blocks arranged on each output shaft are respectively an inner eccentric block (close to the motor) and an outer eccentric block. The inner eccentric block is the fixed eccentric block 110, which is fixed by a key and cannot rotate; the outer eccentric block is the adjustable eccentric block 111, which is locked by a detachable fastening bolt. Scales are provided on the two end faces of the vibration motor 109. After adjusting the angle between the fixed eccentric block 110 and the adjustable eccentric block 111 by referring to the scales, the adjustable eccentric block 111 is pressed by the fastening bolt, so as to control the overlapping angle of the two eccentric blocks and thus control the magnitude of the exciting force.

[0070] Furthermore, for the vibration motors 109, the two mounting holes on the motor mounting plates 108 are not arranged in the same plane, but are arranged in a high-low arrangement - that is, the two vibration motors 109 installed therein are also arranged in a high-low arrangement; after installing the vibration motors 109 and the eccentric blocks, the motor protective cover 112 is connected by screws and covered outside the vibration motors 109.

[0071] It should be noted that the height difference between the axes of the two vibration motors 109 installed on the same motor mounting plate 108 is the golden section angle.

[0072] In this embodiment, refer to Figure 1 and Figure 9, regarding the design of the screen 103, a plurality of screen holes are provided on the screen 103, the screen 103 is arranged on the inner side of the screen frame 102, and the two side edges of the screen 103 are fixed in the screen frame 102 by a long plywood 301, and the lower half of the long plywood 301 is provided with a long groove, the width of the groove is adapted to the thickness of the screen 103, and the side edge of the screen 103 is inserted into the long groove, and an upper hook groove 302 is vertically extended above the long groove of the long plywood 301, and the upper hook groove 302 is bent into an inverted L shape, and the long plywood 301 is connected to the tensioning assembly through the upper hook groove 302-that is, the screen 103 is connected to the tensioning assembly.

[0073] Furthermore, the vibrating screen itself is arranged horizontally, and the slope of the screen 103 in the screen frame 102 is 5° - that is, the screen 1033 is arranged in the screen frame 1022 at a downward angle of 5° from the feed port 106 to the discharge port 107.

[0074] In this embodiment, refer to Figure 10 and Figure 11 , as for the tensioning assembly, four tensioning assemblies are provided at positions near the four vertex corners of the screen frame 102, which are respectively installed on the outer sides of the left and right side plates of the screen frame 102 through the mounting brackets 308; a track 307 is provided on the bottom surface of the mounting groove 306, and the rack 305 is concave, and its concave bottom is adapted to the track 307, and the rack 305 slides along the track 307 on the track 307, and the upper surface of the rack 305 has a sharp tooth portion, which meshes with the tooth edge of the transmission gear 304; the transmission gear 304 is rotatably provided on The mounting groove 306 is located above the rack 305, and a transmission rod 309 passes through the transmission gear 304. One end of the transmission rod 309 passes through the through hole on the back of the mounting groove 306 and extends out to be connected to the stepping motor 310, and the other end is connected to the transmission rod 309 on the transmission gear 304 in the tensioning assembly that is symmetrically arranged at the same side panel position; a through hole is opened on the rack 305, and a long axis 311 passes through the through hole on the rack 305 and connects the two symmetrical racks 305 on the same side panel.

[0075] In this embodiment, refer to Figure 10 As for the connecting long rod 312, a lower hook groove 303 is provided on the connecting long rod 312, which is adapted to the upper hook groove 302 of the long splint 301 for fixing the screen 103. The connecting long rod 312 is set on the inner wall position of the left and right side plates of the screen frame 102, and the screen 103 is fixed inside the screen frame 102 through the cooperation of the long splint 301 and the connecting long rod 312; a window is provided on the back side of the mounting groove 306, and the window position is opposite to the rack 305, and the end of the long axis 311 passing through the rack 305 extends out of the window, and a connecting block 203 is horizontally provided at the end to be connected to the end of the connecting long rod 312.

[0076] Furthermore, to prevent impurities from accidentally vibrating into the tensioning assembly during vibration, the tensioning assembly is arranged outside the sieve frame 102. The long axis 311 of the rack 305 in the tensioning assembly is connected to the connecting long rod 312 inside the sieve frame 102 by opening through holes at corresponding positions on the front plate and the rear plate.

[0077] When the stepping motor 310 is started, the transmission gear 304 begins 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 sieve frame 102, the long axis 311 connecting the rack 305 also moves in the direction away from the sieve frame 102, causing the connecting long rod 312 connected to the long axis 311 through the connecting block 203 to move in the same direction, and at the same time causing the rack 305 on the right side plate to also slide away from the sieve frame 102, so that both sides of the sieve mesh 103 can receive reverse forces, thereby tensioning the sieve mesh 103.

[0078] In this embodiment, refer to Figure 5 and Figure 6 , for the design of the cushion block assembly; a threaded hole is opened in the center of the mounting frame B403, a screw rod 404 passes through the threaded hole, and a disc is provided at the top of the screw rod 404. By rotating the screw rod 404, the screw rod 404 can move up and down in the mounting frame B403. When the screw rod 404 moves upward, the disc abuts against the mounting plate 402 below the spring A104; a locking nut 418 is provided on the lower surface of the mounting frame B403. By rotating the locking nut 418, the screw rod 404 can be locked after it is displaced to a suitable position; the cushion block is rectangular in shape, and the cushion blocks are respectively cushion block A405 and cushion block B406. One end of the cushion block A405 is provided with a protrusion and a semi-circular hole is opened in the center. One end of the cushion block B406 is provided with a depression matching the cushion block A405 and also has a semi-circular hole opened. The cushion block A405 and the cushion block B406 are placed on the mounting frame B403. After being inserted and matched with each other, the semi-circular holes opposite to each other in the center are adapted to the diameter of the screw rod 404.

[0079] In this embodiment, refer to Figure 6 , for the limiting part; mounting holes are provided on both sides of the central threaded hole of the mounting frame B403 (and avoiding the position where the cushion block is placed). The support column passes through the mounting hole and a chassis 407 is provided at the bottom end of the support column. The chassis 407 is an L-shaped long plate. A spring B408 is provided on the chassis 407. The other end of the spring B408 is connected to a spring column 409. The spring column 409 is inserted into a through hole of the mounting frame B403 (the through hole is located between the mounting hole and the threaded hole). At the same time, a limiting cover 410 is sleeved on the top end of the support column, and the limiting cover 410 can rotate around the support column;

[0080] When the limit cover 410 is rotated above the position of the spring post 409 and the limit cover 410 is screwed to the mounting bracket B403, the spring post 409 is pressed into the through hole, and the spring B408 is compressed; when the screw on the limit cover 410 is unscrewed and the limit cover 410 is rotated in the opposite direction, the spring post 409 extends out of the through hole. Second through holes with the same diameter as the spring post 409 are provided on both the spacer block A405 and the spacer block B406. When the spring post extends out, the spacer block A405 and the spacer block B406 are inserted onto the spring posts 409 on the left and right sides, thereby limiting and fixing the spacer block A405 and the spacer block B406, and preventing the spacer block A405 and the spacer block B406 from shifting during vibration and causing the device to tip over.

[0081] In this embodiment, referring to Figure 3 , for the jack assembly, long plates are respectively extended outward on the left and right sides of the front part of the bottom plate of the sieve frame 102. The jack assembly is arranged below the long plates and the jack is arranged facing the long plates. A handle part 411 is arranged on the side of the jack. By pressing down the handle, the piston rod 413 in the jack moves upward, thereby pressing the long plate upward.

[0082] Furthermore, a support part is further included. The support part is arranged on the upper part of the jack. The support lower plate 415 is fixedly arranged on the upper surface of the cylinder barrel 412 of the jack, and the support upper plate 414 is arranged above the jack; hooks are arranged at both ends of the spring C416, and the hooks at both ends of the spring C416 are respectively connected to the connection components on the support upper plate 414 and the support lower plate 415. The support upper plate 414 and the support lower plate 415 can be automatically tightened through the spring C416, so that the support upper plate 414 is in contact with the top end of the piston rod 413, effectively avoiding the situation that the piston rod 413 tilts when the oil drain valve 417 is turned and the pressure is relieved too quickly.

[0083] It should be noted that the jack adopted in this solution is a hydraulic jack, which is a prior art. The hydraulic jack mainly uses oil as the working medium, transfers motion through the change of the sealed volume, and transfers power through the internal pressure of the oil; when the lever handle is lifted by hand, the small piston in the pump in the handle part 411 is driven upward. At this time, the volume in the pump increases to form partial vacuum, and under the action of the atmospheric pressure, the oil flows into the pump to complete oil absorption; when the lever handle is pressed down, the small piston is driven to move downward, the volume in the pump decreases, and the oil in it is squeezed out. The oil then enters the hydraulic cylinder (located in the jack) through the oil pipe. Since the hydraulic cylinder is also sealed, the force generated by the oil entering due to extrusion pushes the large piston upward, causing the connected piston rod 413 to rise and lift the heavy object; by repeatedly lifting and pressing the lever handle, the heavy object can be continuously lifted to achieve the purpose of lifting; when the large piston needs to move downward, the oil drain valve 417 is opened, and then under the action of the weight of the heavy object, the oil in the hydraulic cylinder flows back, and the large piston drops to its original position.

[0084] (Example 2)

[0085] The sieve mesh 103 of embodiment 1 is convenient to be screened, and convenient to carry out screening.

[0086] The present invention is a vibrating screen with higher screening efficiency. The screen 103 is tensioned by setting a tensioning assembly. The screen 103 is first inserted into the long clamping plate 301, and then the long clamping plate 301 is matched with the connecting long rod 312 for installation. The stepping motor 310 is started to rotate the transmission gear 304. The transmission gear 304 is meshed with the rack 305, and the rotation is converted into a linear motion - thereby driving the long shaft 311 to move. Since the connecting long rod 312 is connected to the long shaft 311, the connecting long rod 312 drives the screen 103 to be tensioned, and the tensioning assemblies located on the left and right side plates of the screen frame 102 act in the opposite direction. After the screen 103 is tensioned, the material is fed into the feed port 106 from the feed port 106. Screen 103, start the vibration motor 109, drive the eccentric block to generate exciting force, make the screen frame 102 vibrate up and down, and the material is screened by vibration on the screen 103. If it is necessary to adjust the screening angle of the vibrating screen, first operate the pressing handle in the jack assembly to make the piston rod 413 rise to lift the screen frame 102, and then rotate the screw 404 of the pad assembly so that the screw 404 rises and rests against the mounting plate 402 under the support assembly, and then lock the screw 404 with the locking nut 418, and then install the pad A405 and pad B406 on the pad assembly. The pad A405 and pad B406 are fixed by the spring column 409 in the limit part.

[0087] In current existing vibrating screens, the vibrating motors 109 are connected through connecting cylinders. The connecting cylinders are hollow cylinders and do not rotate along with the motors during rotation, resulting in asynchronous rotation of the left and right side motors in the existing vibrating screens. The asynchronous rotation of the motors will cause the eccentric blocks to rotate asynchronously, thereby generating different exciting forces on the left and right sides. During screening, the materials on the screen mesh 103 tend to one side, leading to a lower screening efficiency, and even damaging the device, causing the device to tip over. Usually, the screen mesh 103 of the existing vibrating screen 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 long-term use of the vibrating screen, the screws at the connection loosen or wear due to vibration, resulting in the failure of the screen mesh 103 to be tensioned. The non-tensioned screen mesh 103 will cause greater wear on the screen mesh 103 by the materials. At the same time, a combination of hooks 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 components during vibration, causing blockage. Currently, the inclination angle of the screen mesh 103 of the vibrating screen is fixed. Since the types of materials to be screened by the vibrating screen are diverse, and their weights and diameters are different, traditional vibrating screening production lines have a large number of equipment, high input costs for the production line, and complex and cumbersome processes. As a result, the failure rate is high, the energy consumption is too high, the operating cost is high, and the floor area is large. Since the materials are processed one by one in many devices, the sand production rate is also very unsatisfactory.

[0088] This solution sets up a transmission crankshaft 201 for these problems. The transmission crankshaft 201 can rotate together with the vibrating motor 109 to make the rotation of the vibrating motor 109 synchronous, and the device is stable and does not tilt during the screening process. At the same time, a connecting rod 202 is set on the eccentric block to make the rotation of the eccentric block synchronous, avoiding the materials to be screened from tilting to one side on the screen mesh 103, resulting in low screening efficiency, and even damaging the device, causing the device to tip over. The vibrating motors 109 arranged on the same side are arranged in a high-low pattern, so that the vibrating motors 109 form an inclined elliptical motion trajectory during rotation, making the screening efficiency higher. The designed tensioning component uses a transmission gear 304 and a rack 305 to mesh, converting the rotation of the gear into a linear motion, and then driving the long shaft 311 connected thereto to perform a linear motion. The screen mesh 103 is tensioned through the linear motion of the connecting long rod 312. At the same time, a long clamping plate 301 and a connecting long rod 312 are set. 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 203. When the vibrating screen starts to vibrate, there will be no problem that the screen mesh 103 fails to be tensioned due to loosening or wear at the connection, thereby increasing the service life of the screen mesh 103.

[0089] The jack assembly and the spacer block assembly are adopted to adjust the inclination angle of the vibrating screen. The piston rod 413 of the jack jacks up the long plate of the screen frame 102 to make the screen frame 102 inclined, and the spacer block assembly is adopted to stabilize the inclination angle. To avoid the movement of the spacer blocks on the spacer block assembly during vibration, which may cause the device to tip over or skew, resulting in unsuccessful screening, this solution realizes the fixation of the spacer blocks through the limit of the spacer blocks themselves and the limiting parts. The spacer blocks are divided into two left and right mutually insertable spacer block A 405 and spacer block B 406, and the spring post 409 in the limiting part penetrates through the spacer block A 405 and the spacer block B 406 to prevent the spacer blocks from shifting during vibration.

[0090] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A vibrating screen with higher screening efficiency, comprising a base (101) and a screen frame (102); the screen frame (102) is arranged on the base (101) through a support assembly, and a screen mesh (103) is arranged in the screen frame (102). Two groups of vibration motors (109) are arranged at the top of the left and right side frames of the screen frame (102), and eccentric blocks are arranged on the vibration motors (109); it is characterized in that: It further includes: Synchronous rotation structure I, which connects two sets of vibration motors (109) to make the two sets of vibration motors (109) rotate synchronously, thereby increasing the amplitude; Screen auxiliary installation structure II, the screen (103) is detachably installed on the screen frame (102) through the screen auxiliary installation structure, facilitating the disassembly, installation and replacement of the screen (103); Angle adjustment mechanism III, an angle adjustment mechanism is provided between the screen frame (102) and the base (101); the angles of the screen frame (102) and the screen (103) are adjusted through the angle adjustment mechanism; Rectangular feet are provided at the four top corner positions of the base (101), and the feet can fix and support the vibrating screen to be horizontally arranged on the ground; Feeding ports (106) and discharging ports (107) are respectively arranged at the front and rear ends of the screen frame (102), and the material placement surfaces of the feeding ports (106) and the discharging ports (107) are inclined downward to be docked with the screen (103), facilitating the conveying of materials on the screen (103).

2. The vibrating screen with higher screening efficiency according to claim 1, characterized in that: Connecting blocks (203) are sleeved on the transmission crankshafts (201) between the vibration motors (109), the connecting blocks (203) are horizontally connected to each other, adjustable eccentric blocks (111) are symmetrically arranged in the middle of each transmission crankshaft (201), and the adjustable eccentric blocks (111) are connected by connecting rods (202), making the vibration of the device more synchronous.

3. The vibrating screen with higher screening efficiency according to claim 2, characterized in that: The vibration motors (109) are symmetrically arranged on the left and right sides of the screen frame (102), and the two vibration motors (109) on the same side are arranged in a high-low order.

4. The vibrating screen with higher screening efficiency according to claim 1, characterized in that: Tracks (307) are arranged on the installation grooves (306) in the screen auxiliary installation structure II, racks (305) are slidably fitted on the tracks (307), transmission gears (304) are penetrated by transmission rods (309) and are arranged above the racks (305), and stepping motors (310) are arranged at the protruding ends of the transmission rods (309); Tensioning components are respectively arranged at the top corners of the left and right side frames of the screen frame (102), and in the tensioning components on the same side, the transmission rods (309) penetrate the opposite transmission gears (304) and the opposite two racks (305) are also connected through a long shaft (311).

5. A vibrating screen with higher screening efficiency according to claim 4, characterized in that: It further includes a connecting part; the connecting part includes a connecting long rod (312) and a long clamping plate (301); both sides of the screen (103) are inserted into the long clamping plate (301) and fixed, the long clamping plate (x01) is connected in cooperation with the connecting long rod (312), and the two ends of the connecting long rod (312) are connected to the long shaft (311) penetrating the rack (305) through the connecting block (203).

6. The vibrating screen with higher screening efficiency according to claim 1, characterized in that: The screen (103) is set as multi-layer screens (103) with different screen hole diameters, and connecting parts are arranged at the positions of each layer of screen (103) to fix the screen (103), and the ends of the connecting long rods (312) at both ends of the lower layer of screen (103) extend to the connecting long rods (312) of the first layer of screen (103); When the stepping motor (310) starts, the first-layer sieve mesh (103) is tensioned by the tensioning components on the left and right sides, and the connecting long rod (312) of the lower-layer sieve mesh (103) moves along with the connecting long rod (312) of the first-layer sieve mesh (103), and the lower-layer sieve mesh (103) is also tensioned synchronously.

7. A vibrating screen with higher screening efficiency according to claim 1, characterized in that: It further includes a cushion block assembly; the cushion block assembly includes a mounting frame B (403) and a screw rod (404); the mounting frame B (403) is arranged on the base (101) and the mounting frame B (403) penetrates through the movable screw rod (404), and at the same time, a locking nut (418) is provided to lock the screw rod (404); When the sieve frame (102) is lifted by a jack, rotate the screw rod (404) to make the screw rod (404) move upward until a certain space is formed between the support assembly and the upper surface of the mounting frame B (403) for installing the cushion block.

8. The vibrating screen with higher screening efficiency according to claim 7, wherein: It further includes a limiting part; the limiting part includes a bottom frame (407), a spring B (408), and a spring column (409); the spring B (408) is arranged on the bottom frame (407) below the mounting frame B (403), and the other end thereof is connected to the spring column (409). The bottom frame (407) is provided with a support column upward and the support column penetrates through the mounting frame B (403). A limiting cover (410) is arranged at the protruding end of the support column, and the limiting cover (410) can rotate around the support column.

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