Screening device capable of adjusting gap size

Abstract

The utility model belongs to the technical field of screening devices, and particularly relates to a screening device capable of adjusting the size of a gap. During use, the brake pins slide to the ends, close to the adjusting knobs, of the sliding grooves, then the adjusting knobs are rotated to drive the screening rods to rotate through the connecting shafts, the gaps between the screening rods can be adjusted, and then materials of different sizes can be screened out. When the screening rod rotates to a required angle, the sliding groove is aligned with the braking groove in the corresponding position, then the braking pin slides towards the other end of the sliding groove, the protruding end of the braking pin is clamped into the braking groove, the direction of the connecting shaft is fixed, and the screening rod is fixed. According to the device, the gaps between the adjacent screening rods can be adjusted by rotating the screening rods so as to adapt to balls of different sizes, large balls and small balls can be automatically and rapidly distinguished and screened, the production efficiency is greatly improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of screening devices, and particularly relates to a screening device with adjustable gap size. Background Technique

[0002] Phosphor bronze balls are a special material for electroplating anodes and are widely used in the field of electronic circuit PCBs. During the production of phosphor bronze balls, they need to be cleaned. When cleaning, the phosphor bronze balls are loaded into a cleaning vibration polishing barrel, and a cleaning agent is added. The cleaning is carried out by relying on the mutual contact and friction between the balls until their surfaces are shiny. When large-diameter phosphor bronze balls are cleaned alone, the gaps between the balls are large, the contact points are few, the cleaning time is long, and it is difficult to clean them thoroughly. Therefore, a certain proportion of small-diameter phosphor bronze balls need to be added and mixed with the large-diameter phosphor bronze balls for cleaning to fill the gaps, increase the contact points, improve the cleaning rate, and improve the cleaning effect. This method of mixed cleaning has been popularized and applied in the actual production of phosphor bronze balls. However, after mixed cleaning, the phosphor bronze balls of different diameters need to be separated according to their diameters. Since the diameters of the large-diameter and small-diameter phosphor bronze balls used in actual production often change, if screened by existing screening tools, it is necessary to frequently stop work, then replace the screening tools with appropriate sieve holes and then resume production, which is not only time-consuming and laborious, but also reduces production efficiency and increases production costs. Therefore, the common practice in the prior art is to put all the balls together on a conveyor belt after cleaning, and then manually select and package the phosphor bronze balls of different sizes on the conveyor belt. This manual selection method not only has low efficiency, but also the worker's hand is easily caught in the conveyor belt, posing a great safety risk. Content of the Utility Model

[0003] Aiming at the problems existing in the prior art, the utility model provides a screening device with adjustable gap size, which specifically includes the following:

[0004] A screening device with adjustable gap size, comprising a fixing plate, a plurality of adjusting devices and a plurality of screening rods. The fixing plate includes opposite first and second sides. A plurality of rotation holes penetrating the first and second sides are provided on the fixing plate. A plurality of braking grooves parallel to the axis of the rotation holes are provided on the inner wall of the rotation holes, and one end of the braking groove penetrates the first side; The adjusting device includes an adjusting knob and a connecting shaft. The connecting shaft includes a first end and a second end. The first end of the connecting shaft is connected to the adjusting knob, and the second end passes through the rotation hole from the first side of the fixing plate and is arranged outside the second side of the fixing plate; A chute parallel to the axis of the rotation hole is provided on the side of the connecting shaft. A protruding braking pin is slidably arranged in the chute. The width of the braking pin is not greater than the width of the opening of the braking groove, and the height of the protruding part of the braking pin is not greater than the depth of the braking groove; The cross section of the screening rod is rectangular. The screening rod includes a first end and a second end. The first end of the screening rod is connected to the second end of the connecting shaft; The plurality of screening rods are arranged parallel to each other. A gap is left between adjacent screening rods for screening materials. When it is necessary to adjust the screening size, first slide the braking pin to one end of the chute close to the adjusting knob, and then rotate the adjusting knob to drive the screening rod to rotate through the connecting shaft. Since the cross section of the screening rod is rectangular, the distance between adjacent screening rods is different when rotated to different angles. Therefore, rotating the screening rod can adjust the gap between the screening rods, and thus materials of different sizes can be screened. When rotated to the required angle, align the chute with the braking groove at the corresponding position, and then slide the braking pin to the other end of the chute to make the protruding end of the braking pin snap into the braking groove, so as to fix the direction of the connecting shaft and further fix the screening rod. After all the screening rods are rotated to the designated positions, the screening of materials can be carried out. It should be noted that in this device, in order to adjust the screening rod more efficiently, a set or multiple sets of transmission devices can also be connected between the plurality of screening rods to realize the simultaneous rotation of the plurality of screening rods, or a rotation control device can be connected to each screening rod to realize the automatic control of rotation, or the rotation efficiency can be improved by other means. The present utility model does not make too many restrictions here.

[0005] Preferably, the plurality of rotation holes are evenly arranged on the side of the fixing plate, and the axis of the rotation hole is perpendicular to the first and second sides of the fixing plate.

[0006] Preferably, the plurality of braking grooves are evenly arranged along the circumference of the rotation hole. The number of the braking grooves can be set as required.

[0007] Preferably, the screening rod is perpendicular to the second side of the fixing plate.

[0008] Preferably, the cross section of the screening rod is square.

[0009] Preferably, it further includes two screening side baffles, a transport rack and a receiving rack. The transport rack includes a transport rack bottom plate and two transport rack side wall baffles arranged on both sides of the transport rack bottom plate. One end of the transport rack bottom plate is arranged adjacent to the second end of the screening rod and is flush with or slightly higher than the top end of the screening rod; the receiving rack includes a receiving rack bottom plate and two receiving rack side wall baffles arranged on both sides of the receiving rack bottom plate. One end of the receiving rack bottom plate is arranged adjacent to the first end of the screening rod and is flush with or slightly higher than the top end of the screening rod; the two screening side baffles are respectively arranged outside the outermost two screening rods, and both ends of the two screening side baffles are respectively connected to the transport rack side wall baffles and the receiving rack side wall baffles. The function of the receiving rack is to receive the mixture of large and small spheres from the external conveyor belt. The receiving rack is set at a certain inclination angle, which can play a certain buffering role to prevent the spheres from directly falling on the screening device and being damaged due to impact. The function of the transport rack is to transport the large-diameter spheres intercepted above the screening device after screening into the packaging box.

[0010] Preferably, the transport rack includes a first section, a second section and a transition section. The width of the first section is greater than the width of the second section, and one end of the first section is arranged adjacent to the second end of the screening rod; the transition section is arranged between the first section and the second section for connecting the first section and the second section. The width of the first section of the transport rack matches the total width of the distribution of multiple screening rods and is used to receive the large-diameter materials after screening; the width of the second section matches the width of the packaging box (not greater than the width of the packaging box) and is used to transport the large-diameter materials into the packaging box; the transition section plays a transitional role between the first section and the second section.

[0011] Preferably, the receiving rack bottom plate is inclined, and the lower end of the receiving rack bottom plate is arranged adjacent to the first end of the screening rod. Preferably, the inclination angle of the receiving rack bottom plate ≤ 60°.

[0012] Preferably, the two transport rack side wall baffles are respectively vertically connected to both sides of the transport rack bottom plate; the two receiving rack side wall baffles are respectively vertically connected to both sides of the receiving rack bottom plate.

[0013] The beneficial effects of the present utility model:

[0014] The utility model discloses a screening device with adjustable gap size, which can be used for screening spherical particles such as phosphor bronze balls. When the screening size needs to be adjusted, first slide the brake pin to one end of the chute close to the adjusting knob, and then rotate the adjusting knob to drive the screening rod to rotate through the connecting shaft. Since the cross-section of the screening rod is rectangular, when it rotates to different angles, the spacing between adjacent screening rods is different. Therefore, rotating the screening rod can adjust the gap between the screening rods, and then different sizes of materials can be screened. When it rotates to the required angle, align the chute with the corresponding brake groove, and then slide the brake pin to the other end of the chute, so that the convex end of the brake pin is stuck into the brake groove, thereby fixing the direction of the connecting shaft and further fixing the screening rod. The device of the utility model can adjust the gap between adjacent screening rods by rotating the screening rod to adapt to balls of different sizes, can automatically and quickly distinguish and screen large balls and small balls, solves the problems that in the prior art, it is necessary to manually screen phosphor bronze balls on the conveyor belt or frequently replace sieves with different apertures to screen balls of different sizes, greatly improves the production efficiency and reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the device disclosed by the utility model;

[0016] Figure 2 is a schematic structural diagram of the fixing plate, adjusting device and screening rod in the device disclosed by the utility model;

[0017] Figure 3 is a partial enlarged view of the connection part between the fixing plate and the adjusting device in the device disclosed by the utility model;

[0018] Figure 4 is a schematic diagram of the working principle of the device disclosed by the utility model.

[0019] In the figure: 1 - transport rack; 1.1 - side wall baffle of the transport rack; 1.2 - bottom plate of the transport rack; 2 - screening device; 2.1 - fixing plate; 2.2 - screening rack; 2.21 - screening rod; 2.3 - adjusting knob; 2.4 - brake pin; 2.5 - brake groove; 2.6 - connecting shaft; 2.61 - chute; 3 - receiving rack; 3.1 - side wall baffle of the receiving rack; 3.2 - bottom plate of the receiving rack. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following combines the attached Figures 1-4 drawings and specific embodiments to describe the present utility model in detail. The embodiments shown below do not limit the content of the utility model recorded in the claims in any way. In addition, all the contents shown in the following embodiments are not limited to what is necessary for the solution of the utility model recorded in the claims.

[0021] Refer to the attached Figures 1-4, A screening device with adjustable gap size, comprising a screening mechanism 2. The screening mechanism 2 includes a fixing plate 2.1, a plurality of adjusting devices, and a plurality of screening rods 2.21. The fixing plate 2.1 includes opposite first and second sides. A plurality of rotation holes penetrating the first and second sides are provided on the fixing plate 2.1. A plurality of braking grooves 2.5 parallel to the axis of the rotation holes are provided on the inner wall of the rotation holes. One end of the braking groove 2.5 penetrates the first side; The adjusting device includes an adjusting knob 2.3 and a connecting shaft 2.6. The connecting shaft 2.6 includes a first end and a second end. The first end of the connecting shaft 2.6 is connected to the adjusting knob 2.3, and the second end passes through the rotation hole from the first side of the fixing plate 2.1 and is arranged outside the second side of the fixing plate 2.1; A chute 2.61 parallel to the axis of the rotation hole is provided on the side of the connecting shaft 2.6. A protruding braking pin 2.4 is slidably arranged in the chute 2.61. The width of the braking pin 2.4 is not greater than the width of the opening of the braking groove 2.5, and the protruding height of the braking pin 2.4 is not greater than the depth of the braking groove 2.5; The cross-section of the screening rod 2.21 is rectangular. The screening rod 2.21 includes a first end and a second end. The first end of the screening rod 2.21 is connected to the second end of the connecting shaft 2.6; The plurality of screening rods 2.21 are arranged parallel to each other to form a screening frame 2.2. A gap is left between adjacent screening rods 2.21 for screening materials. When it is necessary to adjust the screening size, first slide the braking pin 2.4 to one end of the chute 2.61 close to the adjusting knob 2.3, and then rotate the adjusting knob 2.3 to drive the screening rod 2.21 to rotate through the connecting shaft 2.6. Since the cross-section of the screening rod 2.21 is rectangular, when it rotates to different angles, the distance between adjacent screening rods 2.21 is different. Therefore, rotating the screening rod 2.21 can adjust the gap between the screening rods 2.21, and thus different-sized materials can be screened out. When it rotates to the required angle, align the chute 2.61 with the corresponding braking groove 2.5, and then slide the braking pin 2.4 to the other end of the chute 2.61 to make the protruding end of the braking pin 2.4 snap into the braking groove 2.5, so as to fix the direction of the connecting shaft 2.6 and further fix the screening rod 2.21. After all the screening rods 2.21 are rotated to the designated positions, the screening of materials can be carried out. It should be noted that in this device, in order to adjust the screening rod 2.21 more efficiently, one or more sets of transmission devices can also be connected between the plurality of screening rods 2.21 to realize the simultaneous rotation of the plurality of screening rods 2.21, or a rotation control device can be connected to each screening rod 2.21 to realize the automatic control of rotation, or the rotation efficiency can be improved by other means. The present utility model does not make too many restrictions here.

[0022] In some embodiments of the present utility model, the multiple rotation holes are evenly arranged on the side surface of the fixing plate 2.1, and the axis of the rotation hole is perpendicular to the first side surface and the second side surface of the fixing plate 2.1.

[0023] In some embodiments of the present utility model, the multiple braking grooves 2.5 are evenly arranged along the circumference of the rotation hole. The number of the braking grooves 2.5 can be specifically set according to needs.

[0024] In some embodiments of the present utility model, the screening rod 2.21 is perpendicular to the second side surface of the fixing plate 2.1.

[0025] In some embodiments of the present utility model, the cross section of the screening rod 2.21 is square.

[0026] In some embodiments of the present utility model, it further includes two screening side baffles, as well as a transport rack 1 and a receiving rack 3. The transport rack 1 includes a transport rack bottom plate 1.2 and two transport rack side wall baffles 1.1 arranged on both sides of the transport rack bottom plate 1.2. One end of the transport rack bottom plate 1.2 is arranged adjacent to the second end of the screening rod 2.21 and is flush with the top end of the screening rod 2.21 or slightly higher than the top end of the screening rod 2.21. The receiving rack 3 includes a receiving rack bottom plate 3.2 and two receiving rack side wall baffles 3.1 arranged on both sides of the receiving rack bottom plate 3.2. One end of the receiving rack bottom plate 3.2 is arranged adjacent to the first end of the screening rod 2.21 and is flush with the top end of the screening rod 2.21 or slightly higher than the top end of the screening rod 2.21. The two screening side baffles are respectively arranged outside the outermost two screening rods 2.21, and both ends of the two screening side baffles are respectively connected to the transport rack side wall baffle 1.1 and the receiving rack side wall baffle 3.1. The function of the receiving rack 3 is to receive the mixture of large and small spheres from the external conveyor belt. The receiving rack 3 is set at a certain inclination angle, which can play a certain buffering role to prevent the spheres from directly falling on the screening device and being damaged due to impact. The function of the transport rack 1 is to transport the large-diameter spheres intercepted above the screening device after screening into the packaging box.

[0027] In some embodiments of the present utility model, the transport rack 1 includes a first section, a second section and a transition section. The width of the first section is greater than the width of the second section, and one end of the first section is arranged adjacent to the second end of the screening rod 2.21. The transition section is arranged between the first section and the second section and is used to connect the first section and the second section. The width of the first section of the transport rack 1 matches the total width of the distribution of the multiple screening rods and is used to receive the large-diameter materials after screening. The width of the second section matches the width of the packaging box (not greater than the width of the packaging box) and is used to transport the large-diameter materials into the packaging box. The transition section plays a transitional role between the first section and the second section.

[0028] In some embodiments of the present utility model, the bottom plate 3.2 of the receiving frame is inclined, and the lower end of the bottom plate 3.2 of the receiving frame is disposed adjacent to the first end of the screening rod 2.21. Preferably, the inclination angle of the bottom plate 3.2 of the receiving frame ≤ 60°.

[0029] In some embodiments of the present utility model, the two side wall baffles 1.1 of the transport frame are respectively vertically connected to both sides of the bottom plate 1.2 of the transport frame; the two side wall baffles 3.1 of the receiving frame are respectively vertically connected to both sides of the bottom plate 3.2 of the receiving frame.

[0030] In some embodiments of the present utility model, as Figure 1 shown, a phosphor bronze ball screen filter rack with adjustable size includes a transport frame 1, a receiving frame 3 and a screening mechanism 2. The receiving frame 3 is inclined and fixedly arranged on one side of the screening mechanism 2, and the transport frame 1 is parallel and fixedly arranged on the other side of the screening mechanism 2. The inclination angle of the receiving frame 3 does not exceed 60 degrees. The transport frame 1 is formed by splicing a side wall baffle 1.1 of the transport frame and a bottom plate 1.2 of the transport frame. The bottom plate 1.2 of the transport frame is a metal thin plate with one end wide, the other end narrow, and the middle area gradually changing from wide to narrow. The side wall baffle 1.1 of the transport frame is vertically established on both sides of the bottom plate 1.2 of the transport frame and follows the trajectory of the bottom plate 1.2 of the transport frame to prevent the phosphor bronze balls from rolling to the outside during transportation. The receiving frame 3 is formed by splicing a side wall baffle 3.1 of the receiving frame and a bottom plate 3.2 of the receiving frame. The bottom plate 3.2 of the receiving frame is an equi-width metal thin plate. The side wall baffle 3.1 of the receiving frame is vertically established on both sides of the bottom plate 3.2 of the receiving frame and extends along the trajectory of the bottom plate 3.2 of the receiving frame to cover the screening mechanism 2 and finally connect to the side wall baffle 1.1 of the transport frame to ensure that the phosphor bronze balls will not fall during the conveying and screening processes.

[0031] In some embodiments of the present utility model, as Figure 2 and Figure 3As shown in the figure, the screening mechanism 2 is composed of a fixing plate 2.1 and a screening frame 2.2. The fixing plate 2.1 is a rectangular base, and holes penetrating from left to right are equidistantly arranged therein. A plurality of braking grooves 2.5 are arranged along the outer side of the holes, and the plurality of braking grooves 2.5 are all communicated with the holes. The screening frame 2.2 is composed of a plurality of screening rods 2.21 with a square cross-section. One side of the screening rod 2.21 is provided with a cylindrical connecting shaft 2.6 passing through the through hole on the fixing plate 2.1, and the sizes of the connecting shaft and the through hole are adapted to each other. An adjusting knob 2.3 is arranged at the end of the connecting shaft 2.6, and the connecting shaft 2.6 and the screening rod 2.21 can be driven to rotate by rotating the adjusting knob 2.3. A sliding groove 2.61 and a braking pin 2.4 are arranged on the connecting shaft 2.6. The braking pin 2.4 is slidably installed in the sliding groove 2.61 and can reciprocate along the sliding groove 2.61. The braking pin 2.4 protrudes from the connecting shaft 2.6, and the protruding part is adapted to the size of the braking groove 2.5. When it is necessary to drive the screening rod 2.21 to rotate by using the adjusting knob 2.3, the braking pin 2.4 is slid out of the braking groove 2.5. After the adjusting knob is rotated to the required position, the braking pin 2.4 is pushed into the corresponding braking groove 2.5 for fixation to prevent further rotation.

[0032] The working principle of the present utility model is as Figure 4 shown in the figure. When the screening rods 2.21 are all in a parallel state, the distance between the two rods at this time is the maximum distance, which means the maximum diameter of the phosphor bronze balls that the screening frame 2.2 can screen. When the screening rod 2.21 rotates 45 degrees, the adjacent screening rods 2.21 form a 90-degree angle, and the gap that can pass between the two rods at this time is the minimum value, which means the minimum diameter of the phosphor bronze balls that the screening frame 2.2 can screen. When one of the filter rods 2.21 rotates clockwise by a certain angle, the screening rods 2.21 on its left and right sides need to rotate counterclockwise by the corresponding angle, so as to ensure that the gap size between each group of screening rods 2.21 is consistent. By rotating the adjusting knob 2.3 to control the passing gap between the screening rods 2.21, phosphor bronze balls of different sizes and specifications can be screened, saving manpower, improving the operation efficiency, eliminating the need for workers to directly select balls on the conveyor belt, and improving the safety factor.

[0033] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 therefore should not be construed as a limitation of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0034] Unless otherwise clearly defined and limited, the terms "arranged" and "connected" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0035] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A screening device with adjustable gap size, characterized in that, It includes a fixed plate, multiple adjusting devices, and multiple screening rods. The fixed plate includes opposite first and second sides. A plurality of rotation holes penetrating the first and second sides are provided on the fixed plate. A plurality of braking grooves parallel to the axis of the rotation holes are provided on the inner wall of the rotation holes, and one end of the braking grooves penetrates the first side. The adjusting device includes an adjusting knob and a connecting shaft. The connecting shaft includes a first end and a second end. The first end of the connecting shaft is connected to the adjusting knob, and the second end passes through the rotation hole from the first side of the fixed plate and is arranged outside the second side of the fixed plate. A chute parallel to the axis of the rotation hole is provided on the side of the connecting shaft, and a protruding braking pin is slidably arranged in the chute. The width of the braking pin is not greater than the width of the opening of the braking groove, and the height of the protruding part of the braking pin is not greater than the depth of the braking groove. The cross-section of the screening rod is rectangular. The screening rod includes a first end and a second end. The first end of the screening rod is connected to the second end of the connecting shaft. The multiple screening rods are arranged parallel to each other.

2. The screening device with adjustable gap size according to claim 1, characterized in that, The multiple rotation holes are evenly arranged on the side of the fixed plate, and the axis of the rotation hole is perpendicular to the first and second sides of the fixed plate.

3. The screening device with adjustable gap size according to claim 1, characterized in that, The multiple braking grooves are evenly arranged along the circumference of the rotation hole.

4. The screening device with adjustable gap size according to claim 1, wherein The screening rod is perpendicular to the second side of the fixed plate.

5. The screening device with adjustable gap size according to claim 1, characterized in that, The cross-section of the screening rod is square.

6. The screening device with adjustable clearance size according to any one of claims 1-5, characterized in that, It further includes two screening side baffles, a transport rack, and a receiving rack. The transport rack includes a transport rack bottom plate and two transport rack side wall baffles arranged on both sides of the transport rack bottom plate. One end of the transport rack bottom plate is closely arranged adjacent to the second end of the screening rod and is flush with or slightly higher than the top end of the screening rod. The receiving rack includes a receiving rack bottom plate and two receiving rack side wall baffles arranged on both sides of the receiving rack bottom plate. One end of the receiving rack bottom plate is closely arranged adjacent to the first end of the screening rod and is flush with or slightly higher than the top end of the screening rod. The two screening side baffles are respectively arranged outside the outermost two screening rods, and both ends of the two screening side baffles are respectively connected to the transport rack side wall baffles and the receiving rack side wall baffles.

7. The screening device with adjustable gap size according to claim 6, characterized in that, The transport rack includes a first section, a second section, and a transition section. The width of the first section is greater than the width of the second section, and one end of the first section is closely arranged adjacent to the second end of the screening rod. The transition section is arranged between the first section and the second section for connecting the first section and the second section.

8. An adjustable-gap screening device according to claim 6, wherein, The receiving rack bottom plate is inclined, and the lower end of the receiving rack bottom plate is closely arranged adjacent to the first end of the screening rod.

9. The screening device with adjustable gap size according to claim 8, characterized in that, The inclination angle of the receiving rack bottom plate ≤ 60°.

10. The screening device with adjustable gap size according to claim 6, characterized in that, The two transport rack side wall baffles are respectively vertically connected to both sides of the transport rack bottom plate; the two receiving rack side wall baffles are respectively vertically connected to both sides of the receiving rack bottom plate.

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