Screw screening device

Abstract

The utility model relates to the technical field of fastener machining auxiliary equipment, in particular to a screw screening device which comprises a screening mechanism used for screening screws of different specifications, a feeding mechanism used for conveying to-be-screened screws to the screening mechanism and a discharging mechanism used for bearing the screws of the different specifications. The screening mechanism comprises a screening track allowing screws to pass through and a track frame arranged below the screening track and allowing the screening track to be obliquely arranged, the screening track is provided with a sliding gap allowing the screws to slide in a vertical posture, and the feeding mechanism is located at one end of the screening track. The discharging mechanism is located at the end, away from the feeding mechanism, of the screening track and below the track frame body. The multi-specification screw screening device has the effects that the problem that multi-specification screws cannot be screened simultaneously through mechanical screening is solved, and the screening cost of the multi-specification screws is reduced.

Description

Technical Field

[0001] This application relates to the technical field of fastener processing auxiliary equipment, and in particular to a screw screening device. Background Technology

[0002] Screws, as fundamental fasteners in the fields of machinery manufacturing and assembly, are widely used in industries such as construction, automotive, electronics, and medical devices. Their quality directly affects the safety and reliability of equipment. During screw production, due to differences in raw materials, fluctuations in processing techniques, or human error, issues such as screw head diameter exceeding tolerances and length discrepancies frequently occur, leading to defective products being mixed with qualified ones.

[0003] In related technologies, screw screening mainly relies on manual visual inspection or mechanical screening devices. Mechanical screening first uses a vibratory feeder to transport screws, then uses a camera to capture images of the screws and compares them with standard dimensions to automatically sort out defective products.

[0004] Regarding the aforementioned technologies, manual screening is inefficient and prone to missed detections, making it difficult to meet the needs of large-scale production. Most mechanical screening devices can only handle screws of a single specification and cannot simultaneously accommodate the dynamic adjustment of multiple parameters such as screw head diameter and length. Furthermore, visual difference detection systems are sensitive to lighting and installation angles, require complex algorithms, and are therefore costly. Utility Model Content

[0005] In order to improve the problem that mechanical screening cannot screen multiple sizes of screws at the same time and reduce the screening cost of multiple sizes of screws, this application provides a screw screening device.

[0006] The screw screening device provided in this application adopts the following technical solution:

[0007] A screw screening device includes a screening mechanism for screening screws of different specifications, a feeding mechanism for conveying the screws to be screened to the screening mechanism, and a discharging mechanism for receiving screws of various specifications.

[0008] The screening mechanism includes a screening track for screws to pass through and a track frame located below the screening track and for the screening track to be arranged at an angle. The screening track has a sliding gap for the screws to slide in a vertical position. The feeding mechanism is located at one end of the screening track, and the unloading mechanism is located at the end of the screening track away from the feeding mechanism and below the track frame.

[0009] By adopting the above technical solution, the screening track is arranged at an angle on the track frame, and the sliding gap allows the screws to slide vertically. The gap size can be flexibly adjusted, and it is compatible with dynamic adjustment of multiple parameters such as screw head diameter and length, realizing screening of multiple specifications. The feeding and unloading mechanisms work together to form a continuous screening process, improving efficiency. The mechanical structure replaces visual inspection, reducing interference from lighting and angles, lowering the false judgment rate, and improving stability. By abandoning complex vision systems and adopting physical screening tracks, hardware dependence and algorithm costs are reduced, and the modular design facilitates maintenance and expansion, adapting to different production needs. Automated screening avoids the problem of missed inspections by manual visual inspection, improves product quality and production efficiency, and meets the requirements of large-scale production.

[0010] Furthermore, the screening track includes a support housing, a first screening plate and a second screening plate arranged along the length direction of the support housing, an adjusting roller and an auxiliary roller disposed within the support housing, wherein the adjusting roller abuts against the side wall of the first screening plate away from the second screening plate, and the auxiliary roller abuts against the side wall of the second screening plate away from the first screening plate.

[0011] A sliding gap is formed between the first screening plate and the second screening plate to allow the screw to slide and to match the diameter of the screw head. The sliding gap gradually increases from one end of the feeding mechanism to the end away from the feeding mechanism. An adjustment component is provided inside the support housing for cooperating with the adjustment roller.

[0012] By adopting the above technical solution, a sliding gap is formed between the first screening plate and the second screening plate, and the gap gradually increases from the feed end to the discharge end, which can classify and screen screws according to their head diameter, thereby improving the sorting accuracy. By adjusting the adjusting roller driven by the adjusting component, the distance between the first screening plate and the second screening plate is changed, thereby dynamically adjusting the sliding gap size to adapt to the screening needs of screws of different specifications without the need to replace parts.

[0013] Furthermore, the number of the adjusting rollers is two and they are arranged at intervals along the length direction. The two adjusting rollers are defined as the first adjusting roller and the second adjusting roller. The first adjusting roller is located inside the support housing on the side close to the feeding mechanism. A spacer block for rotatable connection is provided between the first adjusting roller and the second adjusting roller.

[0014] By adopting the above technical solution, the first and second adjusting rollers control the gap of the screening track in segments, achieving finer size grading and improving the screening accuracy of multiple specifications. A spacer block connects the two adjusting rollers, enhancing structural rigidity, preventing deformation of the screening plate, ensuring stable sliding gap, and avoiding dimensional deviations caused by vibration. The dual adjusting roller design allows for independent or coordinated gap adjustment, expanding the coverage of screening specifications, accommodating a wider range of screw sizes, and reducing the frequency of equipment adjustments.

[0015] Furthermore, the first adjusting roller and the second adjusting roller are respectively provided with connecting blocks at two mutually distant ends for rotatably connecting with the support housing, and the support housing is provided with sliding adjusting grooves along the width direction on the inner wall near the two ends for the connecting blocks to engage and slide.

[0016] By adopting the above technical solution, the connecting block and the sliding adjustment groove cooperate to achieve precise displacement of the adjusting roller along the width direction, ensuring controllable adjustment range of the screening gap and improving the accuracy of multi-specification screening. The connecting block is locked in the sliding adjustment groove to prevent the adjusting roller from shifting or shaking, ensuring the stability of the screening track and avoiding screening errors caused by vibration. The sliding adjustment groove simplifies the position adjustment process of the adjusting roller, allowing for quick specification adaptation without complex tools, reducing the difficulty of manual operation and time costs.

[0017] Furthermore, the adjustment assembly includes an adjustment screw that passes through the side wall of the support housing and abuts against the connecting block at its end, and a spring-loaded member disposed in the sliding adjustment groove and abuts against the side of the connecting block away from the adjustment screw.

[0018] By adopting the above technical solution, the adjusting screw abuts against the connecting block, and fine-tuning is achieved by rotating the screw, precisely controlling the screening gap size to meet the screening requirements of screws of different specifications. The spring-loaded component abuts against the connecting block, which not only assists in screw adjustment but also provides buffering in vibration environments, preventing wear caused by hard collisions between the connecting block and the tank wall. The screw thrust and the spring force of the spring-loaded component form a balanced adjustment system, ensuring reliable adjustment and facilitating reverse reset operations, thus improving maintenance convenience.

[0019] Furthermore, the support housing is provided with an auxiliary adjusting screw through its side wall for abutting against the spacer block.

[0020] By adopting the above technical solution, the auxiliary adjusting screw can independently control the position of the spacer block, achieving precise adjustment of the distance between the two adjusting rollers and meeting the grading and screening requirements of screws of different specifications. Adjusting the position of the spacer block can compensate for minor deformations of the screening track caused by screw adjustment, ensuring uniform screening gaps and improving screening accuracy. The auxiliary adjusting screw provides an intuitive mechanical adjustment method, allowing for quick spacer block position adjustment without complex tools, shortening equipment debugging time. The threaded engagement between the screw and the spacer block has a self-locking characteristic, effectively maintaining the positional accuracy after adjustment and preventing parameter drift caused by vibration or external forces.

[0021] Furthermore, a plurality of scales for displaying the width of the sliding gap are provided between the first screening plate and the second screening plate.

[0022] By adopting the above technical solution, the scale directly displays the sliding gap width, allowing operators to quickly confirm the current screening specification, avoiding manual measurement errors and improving adjustment efficiency and accuracy. By observing the scale graduations, the amount of screw rotation can be precisely controlled, achieving millimeter-level adjustment of the gap size and ensuring the reliability of multi-specification screening. The scale provides an intuitive gap reference, eliminating the need for repeated testing of screening effects and shortening the debugging cycle during equipment initialization or specification switching. As a physical reference benchmark, the scale facilitates quick troubleshooting of gap abnormalities caused by vibration or wear, reducing maintenance difficulty and costs.

[0023] Furthermore, the track frame has an installation base plate for mounting the screening track. The installation base plate has a material discharge channel that communicates with the sliding gap and allows screws to fall. The material discharge mechanism includes a standard part receiving channel and multiple non-standard part receiving channels. Each of the non-standard part receiving channels is located below the installation base plate and aligned with the material discharge channel below it.

[0024] By adopting the above technical solution, the material discharge channel and the sliding gap are precisely aligned, allowing screws of different specifications to slide along the track and fall directly into the dedicated receiving trough through the corresponding channel, achieving multi-stage screening and synchronous material discharge, thus improving efficiency. The mounting base plate integrates the material discharge channel, reducing additional guiding components, optimizing the spatial layout, making the device more compact, and reducing manufacturing and installation costs. Standard parts receiving troughs and multiple non-standard parts receiving troughs are partitioned to ensure accurate classification and collection of screws of different specifications, avoiding material mixing and facilitating subsequent processing or rework.

[0025] Furthermore, the standard part receiving groove is located on the side of the track frame away from the feeding mechanism, and the track frame is provided with an inclined material trough above the standard part receiving groove for cooperating with the screening track.

[0026] By adopting the above technical solution, the standard parts receiving groove is located at the end of the track frame, forming a natural sliding channel with the inclined material chute, ensuring that screws of the correct specifications smoothly enter the designated collection area and reducing the risk of missorting. The integrated design of the inclined material chute and the track frame makes full use of the longitudinal space of the device, avoids additional floor space, makes the overall structure more compact, and facilitates integration into the production line.

[0027] Furthermore, a vertical vibration motor is provided on the underside of the mounting base plate of the track frame, and the vertical vibration motor is located on the side of the track frame away from the inclined material trough.

[0028] By adopting the above technical solution, the vertical vibration motor provides directional excitation force, which enhances the sliding speed and separation efficiency of the screw on the screening track, and significantly improves the screening effect, especially for small size differences.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. The sliding gap of the screening track gradually increases from the feed end to the discharge end. Combined with the dynamically adjustable distance between the first and second screening plates, it can accurately classify and screen screws according to the screw head diameter. It can dynamically adjust multiple parameters such as screw head diameter and length, and is compatible with the simultaneous screening of various screw specifications, improving sorting accuracy and efficiency. The scale directly displays the sliding gap width, allowing operators to quickly confirm the current screening specifications, avoiding manual measurement errors and improving adjustment efficiency and accuracy.

[0031] 2. The dual-adjustable rollers control the gap between the screening tracks in segments, which can be adjusted independently or in concert to expand the range of screening specifications and reduce the frequency of equipment adjustments; the auxiliary adjusting screw can precisely adjust the distance between the two adjusting rollers, compensate for track deformation, ensure uniform screening gap, and further improve screening accuracy.

[0032] 3. Mechanical structure replaces visual inspection, reducing interference from lighting and angle, lowering the misjudgment rate, and improving stability; the spring in the adjustment component provides buffering in a vibration environment, preventing wear caused by hard collision between the connecting block and the groove wall; the lead screw thrust and the spring force of the spring form a balanced adjustment system, ensuring the reliability of the adjustment and facilitating reverse reset operation. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of a screw screening device according to an embodiment of this application.

[0034] Figure 2 This is an exploded view of the structure of a screw screening device according to an embodiment of this application.

[0035] Figure 3 This is an exploded view of the screening mechanism in an embodiment of this application.

[0036] Figure 4 This is a cross-sectional structural diagram of the adjustment component according to an embodiment of this application.

[0037] Explanation of reference numerals in the attached drawings: 1. Screening mechanism; 11. Screening track; 111. Support housing; 1111. Sliding adjustment groove; 112. First screening plate; 113. Second screening plate; 114. Adjusting roller; 1141. First adjusting roller; 1142. Second adjusting roller; 1143. Spacer block; 1144. Connecting block; 115. Auxiliary roller; 116. Adjustment assembly; 1161. Adjusting screw; 1162. Springback component; 1163. Auxiliary adjusting screw; 117. Sliding clearance; 118. Scale; 12. Track frame; 121. Mounting base plate; 1211. Material discharge groove; 122. Vertical vibration motor; 2. Feeding mechanism; 3. Discharging mechanism; 31. Standard part receiving groove; 32. Non-standard part receiving groove; 33. Inclined material chute. Detailed Implementation

[0038] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figure 1-4 The present application will be further described in detail with reference to the embodiments.

[0039] This application discloses a screw screening device. (Refer to...) Figure 1 and Figure 2 The screw screening device includes a screening mechanism 1, a feeding mechanism 2, and a discharging mechanism 3. The screening mechanism 1 is the main part of the device and is used to screen screws of different specifications. In this embodiment, the feeding mechanism 2 is preferably a vibrating plate, which is used to transport the screws to be screened to the screening mechanism 1, and the discharging mechanism 3 is used to receive the screws of various specifications after screening.

[0040] Reference Figure 2 and Figure 3 The screening mechanism 1 includes a screening track 11 for screws to pass through and a track frame 12 located below the screening track 11 and for the screening track 11 to be arranged at an angle. The feeding mechanism 2 is located at one end of the screening track 11, and the unloading mechanism 3 is located at the end of the screening track 11 away from the feeding mechanism 2 and below the track frame 12.

[0041] The screening track 11 includes a support housing 111 for connection with the track frame 12, a first screening plate 112 and a second screening plate 113 installed inside the support housing 111 and arranged along the length of the support housing 111, an adjusting roller 114 and an auxiliary roller 115 disposed inside the support housing 111, and an adjusting assembly 116 for cooperating with the adjusting roller 114. The bottom of the support housing 111 is hollowed out to facilitate material feeding. The adjusting roller 114 abuts against the side wall of the first screening plate 112 away from the second screening plate 113, and the auxiliary roller 115 abuts against the side wall of the second screening plate 113 away from the first screening plate 112.

[0042] A sliding gap 117 is formed between the first screening plate 112 and the second screening plate 113, allowing the screw to slide and matching the screw head diameter. The discharge port of the feeding mechanism 2 is aligned with the sliding gap 117. The screw head abuts against the top side of the first screening plate 112 and the second screening plate 113, and the screw slides vertically within the sliding gap 117. The adjusting roller 114 can be moved closer to / away from the auxiliary roller 115 by adjusting the adjusting component 116, thereby causing the first screening plate 112 to move closer to / away from the second screening plate 113. In this embodiment, the width of the sliding gap 117 can be preset by controlling the adjusting component 116, thereby gradually increasing from one end of the feeding mechanism 2 to the end away from the feeding mechanism 2.

[0043] In this embodiment, the first screening plate 112 and the second screening plate 113 are symmetrically arranged. Both the first screening plate 112 and the second screening plate 113 have multiple bends, which facilitates the elastic deformation of the first screening plate 112 during adjustment, allowing it to move closer to the second screening plate 113. Multiple scales 118 for displaying the width of the sliding gap 117 are spaced apart between the first screening plate 112 and the second screening plate 113. One end of each scale 118 near the second screening plate 113 passes through the second screening plate 113 and is fixedly connected to it. The other end of each scale 118 near the first screening plate 112 passes through the first screening plate 112 and is slidably connected to it.

[0044] In this embodiment, there are two adjusting rollers 114, which are arranged at intervals along the length direction. The two adjusting rollers 114 are defined as a first adjusting roller 1141 and a second adjusting roller 1142. The first adjusting roller 1141 is located inside the support housing 111 on the side near the feeding mechanism 2. A spacer block 1143 for rotatable connection is provided between the first adjusting roller 1141 and the second adjusting roller 1142. Connecting blocks 1144 for rotatable connection with the support housing 111 are provided at two mutually distant ends of the first adjusting roller 1141 and the second adjusting roller 1142, respectively.

[0045] Combination Figure 4 The support housing 111 has sliding adjustment grooves 1111 along its width direction on its inner wall near both ends, for the connecting blocks 1144 to engage and slide. In this embodiment, there are two sets of adjustment components 116, each used to cooperate with one of the two connecting blocks 1144. Each adjustment component 116 includes an adjustment screw 1161 passing through the side wall of the support housing 111 and abutting against the connecting block 1144 at its end, and a spring-loaded member 1162 located within the sliding adjustment grooves 1111 and abutting against the side of the connecting block 1144 away from the adjustment screw 1161. In this embodiment, the spring-loaded member 1162 is a spring. The support housing 111 also has an auxiliary adjustment screw 1163 passing through its side wall for abutting against the spacer block 1143.

[0046] Reference Figure 1 and Figure 2The track frame 12 has a mounting base plate 121 for fixed connection to the supporting housing 111. Below the mounting base plate 121, near the side of the feeding mechanism 2, is a vertical vibration motor 122 for assisting screw movement. The mounting base plate 121 has a discharge channel 1211 communicating with the sliding gap 117 and allowing screws to fall through. The feeding mechanism 3 includes a standard part receiving slot 31 and multiple non-standard part receiving slots 32. In this embodiment, there are four non-standard part receiving slots 32, each located on the ground below the mounting base plate 121 and aligned with the discharge channel 1211. The standard part receiving slot 31 is located on the side of the track frame 12 away from the feeding mechanism 2. Above the standard part receiving slot 31, the track frame 12 has an inclined material chute 33 for cooperating with the screening track 11.

[0047] The implementation principle of the screw screening device in this application embodiment is as follows: the feeding mechanism 2 (vibrating plate) transports the screws to be screened to one end of the screening track 11 of the screening mechanism 1. The screws slide away from the feeding mechanism 2 along the inclined track 11 by their own gravity. During the sliding process, the screws are classified and screened according to the diameter of the screw head through the sliding gap 117 of the screening track 11. Screws of different specifications finally fall into the receiving groove corresponding to the unloading mechanism 3, thereby realizing the classification and screening of screws.

[0048] The screening track 11 consists of a support housing 111, a first screening plate 112, and a second screening plate 113. An adjusting roller 114 abuts against the first screening plate 112, and an auxiliary roller 115 abuts against the second screening plate 113. By adjusting the adjusting roller 114 to move closer to or further away from the auxiliary roller 115 through the adjusting component 116, the first screening plate 112 can move closer to or further away from the second screening plate 113, thereby changing the width of the sliding gap 117 formed between the first screening plate 112 and the second screening plate 113. The width of the sliding gap 117 gradually increases from one end of the feeding mechanism 2 to the end away from the feeding mechanism 2 to adapt to the screening requirements of screws of different specifications.

[0049] There are two adjusting rollers 114 (first adjusting roller 1141 and second adjusting roller 1142), and a spacer block 1143 connects the two adjusting rollers 114 to enhance structural rigidity. The adjusting screw 1161 in the adjusting assembly 116 passes through the side wall of the support housing 111 and abuts against the connecting block 1144. By rotating the adjusting screw 1161, the connecting block 1144 can move within the sliding adjusting groove 1111, thereby driving the adjusting roller 114 closer to or further away from the auxiliary roller 115. The spring 1162 abuts against the side of the connecting block 1144 away from the adjusting screw 1161, providing cushioning in a vibration environment and preventing the connecting block 1144 from hardly colliding with the groove wall and causing wear. The screw thrust and the spring force of the spring 1162 form a balanced adjusting system, ensuring adjustment reliability and facilitating reset operation.

[0050] The auxiliary adjusting screw 1163 passes through the side wall of the support housing 111 and abuts against the spacer block 1143. It can control the position of the spacer block 1143 independently, realize the precise adjustment of the distance between the two adjusting rollers 114, compensate for the slight deformation of the screening track 11 caused by the screw adjustment, ensure uniform screening gap, and improve screening accuracy.

[0051] Multiple scales 118 are arranged at intervals between the first screening plate 112 and the second screening plate 113. One end of each scale 118 passes through and is fixedly connected to the second screening plate 113, while the other end passes through and is slidably connected to the first screening plate 112. Operators can quickly confirm the current screening specifications by directly displaying the width of the sliding gap 117 on the scale 118, precisely control the advance of the adjusting screw 1161, achieve millimeter-level gap adjustment, and facilitate troubleshooting gap abnormalities, thus reducing maintenance difficulty.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A screw screening device, characterized in that: It includes a screening mechanism (1) for screening screws of different specifications, a feeding mechanism (2) for feeding the screws to be screened to the screening mechanism (1), and a discharging mechanism (3) for receiving screws of various specifications. The screening mechanism (1) includes a screening track (11) for screws to pass through and a track frame (12) located below the screening track (11) and for the screening track (11) to be arranged at an angle. The screening track (11) has a sliding gap (117) for the screws to slide in a vertical position. The feeding mechanism (2) is located at one end of the screening track (11), and the unloading mechanism (3) is located at the end of the screening track (11) away from the feeding mechanism (2) and below the track frame (12).

2. The screw screening device according to claim 1, characterized in that: The screening track (11) includes a support housing (111), a first screening plate (112) and a second screening plate (113) arranged along the length direction of the support housing (111), an adjusting roller (114) and an auxiliary roller (115) disposed in the support housing (111). The adjusting roller (114) abuts against the side wall of the first screening plate (112) away from the second screening plate (113), and the auxiliary roller (115) abuts against the side wall of the second screening plate (113) away from the first screening plate (112). A sliding gap (117) is formed between the first screening plate (112) and the second screening plate (113) for the screw to slide and to match the diameter of the screw head. The sliding gap (117) gradually increases from one end of the feeding mechanism (2) to the end away from the feeding mechanism (2). An adjustment component (116) for cooperating with the adjustment roller (114) is provided in the support housing (111).

3. The screw screening device according to claim 2, characterized in that: The number of the adjusting rollers (114) is two and they are arranged at intervals along the length direction. The two adjusting rollers (114) are defined as the first adjusting roller (1141) and the second adjusting roller (1142). The first adjusting roller (1141) is located inside the support housing (111) on the side close to the feeding mechanism (2). A spacer block (1143) for rotatable connection is provided between the first adjusting roller (1141) and the second adjusting roller (1142).

4. The screw screening device according to claim 3, characterized in that: The first adjusting roller (1141) and the second adjusting roller (1142) are respectively provided with connecting blocks (1144) at two ends that are far apart from each other for rotating connection with the support housing (111). The support housing (111) is provided with sliding adjusting grooves (1111) along the width direction on the inner wall near the two ends for the connecting blocks (1144) to engage and slide.

5. A screw screening device according to claim 4, characterized in that: The adjustment assembly (116) includes an adjustment screw (1161) that passes through the side wall of the support housing (111) and abuts against the connecting block (1144) at its end, and a spring-loaded member (1162) that is disposed in the sliding adjustment groove (1111) and abuts against the side of the connecting block (1144) away from the adjustment screw (1161).

6. A screw screening device according to claim 5, characterized in that: The support housing (111) has an auxiliary adjusting screw (1163) passing through its side wall for abutting against the spacer block (1143).

7. A screw screening device according to claim 2, characterized in that: A plurality of scales (118) for displaying the width of the sliding gap (117) are provided between the first screening plate (112) and the second screening plate (113).

8. A screw screening device according to claim 1, characterized in that: The track frame (12) has a mounting base plate (121) for mounting the screening track (11). The mounting base plate (121) has a material discharge groove (1211) that communicates with the sliding gap (117) and allows screws to fall. The feeding mechanism (3) includes a standard part receiving groove (31) and a plurality of non-standard part receiving grooves (32). Each of the non-standard part receiving grooves (32) is located below the mounting base plate (121) and aligned with the material discharge groove (1211).

9. A screw screening device according to claim 8, characterized in that: The standard part receiving groove (31) is located on the side of the track frame (12) away from the feeding mechanism (2), and the track frame (12) is provided with an inclined material trough (33) above the standard part receiving groove (31) for cooperating with the screening track (11).

10. A screw screening device according to claim 9, characterized in that: The track frame (12) is provided with a vertical vibration motor (122) on the underside of the mounting base plate (121), and the vertical vibration motor (122) is located on the side of the track frame (12) away from the inclined trough (33).

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