Screening device for locking screws

Abstract

The utility model discloses a screening device for locking screws, which comprises a visual screening machine used for screening the screws and a vibrating disk used for orderly arranging and outputting the screws, and a linear feeder used for conveying the screws to the visual screening machine is arranged at a discharge port of the vibrating disk. The linear feeder is composed of a support arranged on the vibration disc and a guide rail arranged on the support. According to the screw screening device, the linear feeder is used for guiding the screws to be screened discharged from the vibration disc to enter the visual screening machine for screening, the intercepting assembly is arranged on the linear feeder to periodically intercept the conveyed screws, and the rotating mechanism and the sweeping mechanism are used for sweeping the intercepted screws within the screw conveying stopping time; and the processing residues adhered to the cross-shaped hole and the screw rod of the screw fall off, so that the adverse effect of the processing residues on the visual screening machine can be reduced, and the misjudgment probability is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of screw screening, in particular to a screening device for locking screws. Background Art

[0002] The statements herein only provide background art related to the present invention and do not necessarily constitute prior art.

[0003] Screw visual screening is a technology that uses image processing technology to detect the appearance defects of screw products. It mainly takes pictures of screws through a camera and transmits the images to a computer system for analysis. According to the preset standards, the screw threads and cross holes of the screws are detected to determine whether there are defects.

[0004] Although the current screw visual screening machine is equipped with a vibrating disk for feeding, which can make the irregular screws enter the screw visual screening machine one by one, when using the vibrating disk for feeding, a large number of screws to be screened are often stacked in the vibrating disk, and processing residues are likely to appear on these screws to be screened. If directly conveyed into the screw visual screening machine through the vibrating disk, some qualified screws are easily judged as unqualified products due to the adhesives attached to their surfaces, and the misjudgment probability is high. Content of the Utility Model

[0005] The purpose of the utility model is to aim at the above-mentioned deficiencies at present and provide a screening device for locking screws to achieve the purpose of reducing the misjudgment probability.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions: A screening device for locking screws, including a visual screening machine for screw screening and a vibrating disk for orderly arranging and outputting screws. A linear feeder for conveying screws to the visual screening machine is arranged at the discharge port of the vibrating disk. The linear feeder is composed of a bracket arranged on the vibrating disk and a guide rail arranged on the bracket. The screws output by the vibrating disk are conveyed one by one from one end of the adjacent guide rails to the other end of the guide rails located on the visual screening machine. An intercepting component for timing to intercept screws, a rotating mechanism for driving the screws to rotate after being intercepted, and a cleaning mechanism for cooperating with the rotating mechanism to clean the screw rod and nut parts of the screws are arranged on the guide rails.

[0007] Further, the guide rail includes a bottom plate arranged on the top of the bracket. Two guide plates are arranged on the top of the bottom plate. The distance between the two guide plates is not less than the diameter of the screw stud and less than the diameter of the screw nut. At least two columns are arranged between the guide plate and the bottom plate, and the height of the columns is greater than the thickness of the screw nut;

[0008] The interception component includes a linear module and an interception hook disposed on the linear module and capable of being driven by the linear module to move toward and away from one side of the bottom plate. The interception hook includes an intermediate plate connected to the linear module. On the side of the intermediate plate away from the linear module, there is an L-shaped stop strip located between two guide plates. The L-shaped stop strip is composed of a horizontal section parallel to the bottom plate and a vertical section provided at the bottom of the horizontal section. The vertical section is located at one end of the horizontal section close to the vision screening machine.

[0009] Further, the rotating mechanism is a belt conveyor. The rotating mechanism is disposed between one of the guide plates and the bottom plate, and the end of the rotating mechanism close to the vision screening machine is flush with the vertical section of the L-shaped stop strip. The rotating mechanism is not located within the moving area of the screw, and when the screw is intercepted by the interception component, the rotating mechanism abuts against the outer wall of the screw nut.

[0010] Further, the cleaning mechanism includes a nut cleaning brush for cleaning the screw nut and a screw rod cleaning component for cleaning the screw rod. The linear module is a bidirectional linear module. The nut cleaning brush is driven by the linear module and can move toward and away from the screw simultaneously with the interception hook. A strip-shaped through hole is formed in the bottom plate for the nut cleaning brush to move toward and away from one side of the screw. The width of the strip-shaped through hole is not greater than the diameter of the screw nut. When the nut cleaning brush is flush with the bottom plate, the interception hook is located within the moving area of the screw;

[0011] The screw rod cleaning component is disposed in the guide plate on the side away from the rotating mechanism. A mounting groove for installing the screw rod cleaning component is formed on the side of the guide plate close to the screw. The screw rod cleaning component includes a screw rod cleaning brush disposed in the mounting groove and capable of moving toward and away from one side of the screw. A tension spring is disposed between the screw rod cleaning brush and the corresponding guide plate. When the tension spring is in a natural state, the screw rod cleaning brush is located within the mounting groove. A push block is disposed on the side of the screw rod cleaning brush away from the screw. A pressing block abutting against the push block is disposed on the side of the push block away from the screw rod cleaning brush. The contact sides of the pressing block and the push block are both inclined surfaces. A pressing rod passing through the corresponding guide plate is disposed at the top of the pressing block. The pressing rod is located directly below the intermediate plate. When the nut cleaning brush is flush with the bottom plate, the pressing rod does not contact the intermediate plate.

[0012] Further, a plurality of balls corresponding to a plurality of screws one by one are rotatably disposed at the bottom of the horizontal section of the L-shaped stop strip.

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

[0014] The utility model uses a linear feeder to guide the screws to be screened discharged from a vibrating bowl into a vision screening machine for screening. By arranging an intercepting component on the linear feeder to intercept the conveyed screws regularly, during the time when the screw conveyance stops, a rotating mechanism and a cleaning mechanism are used to clean the intercepted screws, so that the processing residues adhered to the cross holes and screw rods of the screws fall off, thereby reducing the adverse effects of the processing residues on the vision screening machine and reducing the misjudgment probability. Description of the Drawings

[0015] Figure 1 is a three-dimensional view of the utility model;

[0016] Figure 2 is Figure 1 a partially enlarged schematic view of the position shown at A;

[0017] Figure 3 is a working schematic view of the utility model when the screws are being cleaned;

[0018] Figure 4 is a schematic view of the position of the intermediate plate and the pressing rod of the utility model;

[0019] Figure 5 is a schematic view of the position of the screw cleaning assembly of the utility model;

[0020] Figure 6 is a structural view of the screw cleaning assembly of the utility model.

[0021] In the figure:

[0022] 1, vision screening machine; 2, vibrating bowl; 3, linear feeder; 31, bracket; 32, guide rail; 321, bottom plate; 322, guide plate; 323, column; 4, intercepting component; 41, linear module; 42, intercepting hook; 421, intermediate plate; 422, L-shaped retaining strip; 5, rotating mechanism; 6, cleaning mechanism; 61, nut cleaning brush; 62, screw cleaning assembly; 621, screw cleaning brush; 622, tension spring; 623, pushed block; 624, pressing block; 625, pressing rod. Detailed Embodiments

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the utility model with reference to the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without creative efforts shall fall within the protection scope of the utility model.

[0024] Please refer to Figures 1-6, the utility model discloses a screening device for locking screws, which includes a vision screening machine 1 for screw screening and a vibrating disk 2 for orderly arranging and outputting screws. A linear feeder 3 for conveying screws to the vision screening machine 1 is arranged at the discharge port of the vibrating disk 2. The linear feeder 3 is composed of a bracket 31 arranged on the vibrating disk 2 and a guide rail 32 arranged on the bracket 31. The screws output by the vibrating disk 2 are conveyed one by one from one end of the adjacent guide rails 32 to the other end of the guide rail 32 located on the vision screening machine 1. An intercepting component 4 for timing to intercept screws, a rotating mechanism 5 for driving the screws to rotate after being intercepted, and a cleaning mechanism 6 for cooperating with the rotating mechanism 5 to clean the screw rod and nut of the screw are arranged on the guide rail 32.

[0025] In the utility model, the linear feeder 3 is used to guide the screws to be screened discharged from the vibrating disk 2 into the vision screening machine 1 for screening. By arranging an intercepting component 4 on the linear feeder 3 to regularly intercept the conveyed screws, during the time when the screws stop being conveyed, the rotating mechanism 5 and the cleaning mechanism 6 are used to clean the intercepted screws, so that the processing residues adhering to the cross holes and screw rods of the screws fall off, thereby reducing the adverse effects of the processing residues on the vision screening machine 1 and reducing the misjudgment probability.

[0026] In specific implementation, in order to improve the conveying smoothness of the linear feeder 3 for screws, the height of the guide rail 32 on the side close to the vibrating disk 2 is higher than the height of the guide rail 32 on the side close to the vision screening machine 1, and a vibrating motor can be additionally arranged on the bracket 31 to accelerate the screw conveying.

[0027] In an embodiment, the guide rail 32 includes a bottom plate 321 arranged on the top of the bracket 31. Two guide plates 322 are arranged on the top of the bottom plate 321. The distance between the two guide plates 322 is not less than the diameter of the screw stud and less than the diameter of the screw nut. At least two columns 323 are arranged between the guide plate 322 and the bottom plate 321, and the height of the column 323 is greater than the thickness of the screw nut.

[0028] The intercepting component 4 includes a linear module 41 and an intercepting hook 42 arranged on the linear module 41 and capable of being driven by the linear module 41 to move towards and away from one side of the bottom plate 321. The intercepting hook 42 includes an intermediate plate 421 connected to the linear module 41. An L-shaped stop bar 422 located between the two guide plates 322 is arranged on the side of the intermediate plate 421 away from the linear module 41. The L-shaped stop bar 422 is composed of a horizontal section parallel to the bottom plate 321 and a vertical section arranged at the bottom of the horizontal section. The vertical section is located at one end of the horizontal section close to the vision screening machine 1.

[0029] With such a design, the screws to be screened can move one by one in the style of the nut facing downwards and the screw rod between the two guide plates 322, so that the linear module 41 only needs to drive the L-shaped stop bar 422 to approach and move away from the screws to achieve the effects of intercepting the screws and allowing the screws to continue moving.

[0030] In specific implementation, to ensure that each screw can be cleaned, the linear module 41 can be controlled by a timing controller. After all the screws to be cleaned are moved out from below the L-shaped stop bar 422, the linear module 41 can promptly drive the L-shaped stop bar 422 to approach the screws to intercept the uncleaned screws.

[0031] In one embodiment, the rotating mechanism 5 is a belt conveyor. The rotating mechanism 5 is arranged between one of the guide plates 322 and the bottom plate 321, and the end of the rotating mechanism 5 close to the vision screening machine 1 is flush with the vertical section of the L-shaped stop bar 422. The rotating mechanism 5 is not located within the moving area of the screws, and when the screws are intercepted by the intercepting assembly 4, the rotating mechanism 5 abuts against the outer wall of the screw nuts of the screws.

[0032] With such a design, the rotating mechanism 5 can drive multiple screws in contact with it to rotate simultaneously, thereby improving the cleaning efficiency of the screws.

[0033] It should be noted that the vision screening machine 1, the vibrating disk 2, and the belt conveyor belong to mature existing technologies and will not be elaborated here.

[0034] In one embodiment, the cleaning mechanism 6 includes a nut cleaning brush 61 for cleaning the screw nuts and a screw rod cleaning assembly 62 for cleaning the screw rods. The linear module 41 is a bidirectional linear module. The nut cleaning brush 61 is driven by the linear module 41 and can approach or move away from the screws simultaneously with the intercepting hook 42. A strip-shaped through hole for the nut cleaning brush 61 to move towards and away from the screws on one side is formed on the bottom plate 321, and the width of the strip-shaped through hole is not greater than the diameter of the screw nuts. When the nut cleaning brush 61 is flush with the bottom plate 321, the intercepting hook 42 is located within the moving area of the screws;

[0035] The screw rod cleaning assembly 62 is arranged in the guide plate 322 on the side away from the rotating mechanism 5. A mounting groove for installing the screw rod cleaning assembly 62 is formed on the side of the corresponding guide plate 322 close to the screws. The screw rod cleaning assembly 62 includes a screw rod cleaning brush 621 arranged in the mounting groove and capable of moving towards and away from the screws on one side. A tension spring 622 is arranged between the screw rod cleaning brush 621 and the corresponding guide plate 322. When the tension spring 622 is in a natural state, the screw rod cleaning brush 621 is located within the mounting groove. A push block 623 is arranged on the side of the screw rod cleaning brush 621 away from the screws. A pressing block 624 in contact with the push block 623 is arranged on the side of the push block 623 away from the screw rod cleaning brush 621. The contact sides of the pressing block 624 and the push block 623 are both inclined planes. A pressing rod 625 penetrating the corresponding guide plate 322 is arranged at the top of the pressing block 624. The pressing rod 625 is located directly below the middle plate 421. When the nut cleaning brush 61 is flush with the bottom plate 321, the pressing rod 625 does not contact the middle plate 421.

[0036] With such a design, during the normal movement of the screw, neither the nut cleaning brush 61 nor the screw rod cleaning brush 621 is in the movement area of the screw, so that they will not hinder the movement of the screw. During the process of the L-shaped stop strip 422 approaching the screw movement area, for a period of time, the nut cleaning brush 61 and the screw rod cleaning brush 621 still will not contact the screw and affect its movement. At this time, the screw can be blocked by the L-shaped stop strip 422, so that during this period, the screws output from the vibrating disk 2 can be concentrated and arranged in the cleaning area. When the L-shaped stop strip 422 continues to move downward, at this time, the nut cleaning brush 61 will lift the screw. At the same time, the pressing rod 625 is squeezed by the middle plate 421, pushing the pressing block 624 to squeeze the pushed block 623, so that the screw rod cleaning brush 621 also moves out of the installation groove and contacts the screw rod. At this time, the screws in contact with the rotating mechanism 5 can rotate synchronously, and during the rotation process, they will rub against the nut cleaning brush 61 and the screw rod cleaning brush 621 to brush off the processing residues adhered to their surfaces. After the cleaning is completed, the L-shaped stop strip 422 moves in the reverse direction, and the screws can continue to move toward the vision screening machine 1 side.

[0037] In specific implementation, a cavity can be opened inside the nut cleaning brush 61, a slag inlet hole communicating with the cavity is opened on the side of the nut cleaning brush 61 in contact with the screw, an air extraction pipe communicating with the cavity is arranged at the bottom of the nut cleaning brush 61, the other end of the air extraction pipe is connected to an air extraction fan, and a filter is arranged in the air extraction pipe, so that the brushed residues can be centrally collected, avoiding the situation that the brushed residues adhere to the screw again.

[0038] In an embodiment, a plurality of balls corresponding to a plurality of screws one by one are rotatably arranged at the bottom of the horizontal section of the L-shaped stop strip 422.

[0039] With such a design, after the nut cleaning brush 61 pushes the screw close to the horizontal section of the L-shaped stop strip 422, the screw abuts against the balls, so that the wear between the screw rod and the L-shaped stop strip 422 during the self-rotation of the screw can be reduced.

[0040] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, then such directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0042] In addition, "a plurality of" means two or more.

[0043] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the scope of protection of the present utility model.

Claims

1. A screening device for locking screws, comprising a visual screening machine (1) for screening screws and a vibrating plate (2) for outputting screws in an orderly manner, wherein a linear feeder (3) for conveying the screws to the visual screening machine (1) is arranged at the discharge port of the vibrating plate (2), wherein the linear feeder (3) is composed of a bracket (31) arranged on the vibrating plate (2) and a guide rail (32) arranged on the bracket (31), and the screws output by the vibrating plate (2) are conveyed one by one from one end of an adjacent guide rail (32) to the other end of the guide rail (32) located on the visual screening machine (1), characterized in that: The guide rail (32) is provided with an interception assembly (4) for regularly intercepting the screw, a rotating mechanism (5) for driving the screw to rotate after the screw is intercepted, and a cleaning mechanism (6) for cooperating with the rotating mechanism (5) to clean the screw rod and nut of the screw.

2. A screening device for locking screws according to claim 1, characterized in that: The guide rail (32) comprises a bottom plate (321) arranged on the top of the bracket (31), two guide plates (322) are arranged on the top of the bottom plate (321), the spacing between the two guide plates (322) is not less than the stud diameter of the screw and is less than the nut diameter of the screw, at least two columns (323) are arranged between the guide plate (322) and the bottom plate (321), and the height of the columns (323) is greater than the thickness of the nut of the screw; The interception assembly (4) comprises a linear module (41) and an interception hook (42) arranged on the linear module (41) and capable of being driven by the linear module (41) to move toward and away from a side of a bottom plate (321); the interception hook (42) comprises an intermediate plate (421) connected to the linear module (41); an L-shaped baffle (422) located between two guide plates (322) is arranged on a side of the intermediate plate (421) away from the linear module (41); the L-shaped baffle (422) consists of a transverse section parallel to the bottom plate (321) and a vertical section arranged at the bottom of the transverse section; the vertical section is located at one end of the transverse section close to the visual screening machine (1).

3. A screening device for locking screws according to claim 2, characterized in that: The rotating mechanism (5) is a belt conveyor, and the rotating mechanism (5) is arranged between one of the guide plates (322) and the bottom plate (321), and the end of the rotating mechanism (5) close to the visual screening machine (1) is flush with the vertical section of the L-shaped retaining bar (422), the rotating mechanism (5) is not located in the moving area of ​​the screw, and when the screw is intercepted by the interception component (4), the rotating mechanism (5) abuts against the outer wall of the nut of the screw.

4. A screening device for locking screws according to claim 2, characterized in that: The cleaning mechanism (6) comprises a nut cleaning brush (61) for cleaning the screw nut and a screw rod cleaning assembly (62) for cleaning the screw rod. The linear module (41) is a bidirectional linear module. The nut cleaning brush (61) is driven by the linear module (41) and can move closer to or farther from the screw at the same time as the intercepting hook (42). The bottom plate (321) is provided with a strip-shaped through hole for the nut cleaning brush (61) to move closer to or farther from the screw. The width of the strip-shaped through hole is not greater than the nut diameter of the screw. When the nut cleaning brush (61) is flush with the bottom plate (321), the intercepting hook (42) is located in the screw moving area. The screw cleaning assembly (62) is arranged in a guide plate (322) on a side away from the rotating mechanism (5); a mounting groove for mounting the screw cleaning assembly (62) is provided on a side of the guide plate (322) close to the screw; the screw cleaning assembly (62) includes a screw cleaning brush (621) arranged in the mounting groove and capable of moving toward and away from the screw; a tension spring (622) is arranged between the screw cleaning brush (621) and the corresponding guide plate (322); when the tension spring (622) is in a natural state, the screw cleaning brush (621) is located in the mounting groove; the screw cleaning brush A push block (623) is arranged on the side away from the screw (621), and a pressure block (624) abutting against the push block (623) is arranged on the side away from the screw cleaning brush (621). The contact side of the pressure block (624) and the push block (623) is an inclined surface. A pressure rod (625) penetrating the corresponding guide plate (322) is arranged on the top of the pressure block (624), and the pressure rod (625) is located directly below the middle plate (421). When the nut cleaning brush (61) is flush with the bottom plate (321), the pressure rod (625) does not contact the middle plate (421).

5. The screening device for locking screws according to claim 2, characterized in that: A plurality of balls corresponding to the plurality of screws are rotatably arranged at the bottom of the transverse section of the L-shaped retaining strip (422).

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