Screw detection mechanism
By designing a screw inspection mechanism, which automatically detects and rejects workpieces missing screws using inspection and rejection components, the problem of mixing defective and finished products caused by missing screws on workpieces is solved, thus improving production quality and efficiency.
Patent Information
- Application Number
- CN202423186186.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-23
AI Technical Summary
The lack of screw detection devices in existing technologies means that missing screws on workpieces cannot be promptly removed, resulting in defective products being mixed with finished products and affecting production quality.
A screw inspection mechanism was designed, including a rotary table, a limit seat, an inspection component, and a rejection component. The first and second inspection heads of the inspection component detect the presence of screws. If a screw is missing, the rejection component rejects the workpiece to avoid mixing defective products with finished products.
It enables automatic detection and removal of screws on workpieces, ensuring the quality of finished products, avoiding the mixing of defective and finished products, and improving production efficiency.
Smart Images
Figure CN223655545U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electronic device manufacturing and processing technology, and in particular to a screw inspection mechanism. Background Technology
[0002] In modern electronics manufacturing, screws are frequently required to be securely screwed onto workpieces. In such cases, the workpiece is typically placed on a flat worktable to facilitate subsequent assembly. To ensure the screws can be screwed in and secured, the workpiece surface is often pre-designed and machined with corresponding threaded holes. Currently, fully automatic screw feeders are mostly used to feed the screws into the threaded holes of the workpiece, and then automatic screw tightening machines are used to tighten the screws onto the workpiece. Finally, the assembled workpiece is removed from the worktable.
[0003] Regarding the aforementioned technologies, in actual production, machines cannot guarantee a 100% screw supply, and omissions are inevitable, meaning some workpieces may lack screws. Due to the lack of appropriate detection devices, workpieces missing screws cannot be promptly removed, and defective products are easily mixed with finished products, impacting subsequent production. Therefore, improvements are needed. Utility Model Content
[0004] To facilitate the inspection of screws on workpieces, this application provides a screw inspection mechanism.
[0005] The screw detection mechanism provided in this application adopts the following technical solution:
[0006] A screw inspection mechanism includes a rotary table, a limiting seat, an inspection component, and a rejection component. The rotary table is rotatably mounted. The limiting seats are disposed on the rotary table and spaced apart along the circumference of the rotary table. The limiting seats have limiting grooves for limiting the workpiece. A portion of the limiting seats is located outside the table surface of the rotary table. The inspection component is located on one side of the rotary table and is used to inspect screws on the workpiece.
[0007] The detection assembly includes a fixed base, a first cylinder, a first detection head, a second cylinder, and a second detection head. Both the first and second cylinders are mounted on the fixed base. The first detection head is mounted on the first cylinder, and the second detection head is mounted on the second cylinder. The first and second detection heads are vertically opposite each other and both move in a vertical direction. The first and second detection heads are used to detect both ends of the screw. The rejection assembly is mounted on the limiting seat and is used to reject workpieces that are missing screws.
[0008] By adopting the above technical solution, during the production process, the workpiece is placed in the limiting groove of the limiting seat using manual or automated equipment, while an automatic screw feeder delivers screws onto the workpiece. As the rotary table rotates, the limiting seat containing the workpiece and screws moves to a position close to the detection component.
[0009] Next, the first cylinder is activated, controlling the first detection head to move downwards and press against one end of the screw; simultaneously, the second cylinder is activated, controlling the second detection head to move upwards and press against the other end of the screw. Both the first and second detection heads are equipped with displacement sensors. If the workpiece is missing a screw, there is no screw between the first and second detection heads, and the distance to the screw cannot be sensed. The detection component then transmits a signal to the rejection component, rejecting the workpiece with the missing screw and preventing the mixing of finished and defective products in subsequent processes.
[0010] Preferably, it also includes an automatic screw tightening machine, with a support platform provided above the rotary table, and the automatic screw tightening machine is mounted on the support platform for tightening screws onto the workpiece.
[0011] By adopting the above technical solution, the automatic screw-tightening machine can tighten screws onto workpieces, achieving automated production. In some production scenarios, the automatic screw-tightening machine can also be used to detect whether screws are stripped. Screw stripping refers to damage to the screw's threads, making it impossible to tighten or loosen properly. If a screw is stripped, the automatic screw-tightening machine cannot tighten it onto the workpiece, and such products must be rejected.
[0012] Preferably, the rejection assembly includes a pusher cylinder and a pusher block. The pusher cylinder is disposed on the limiting seat, and the pusher block is slidably connected to the limiting seat and connected to the pusher cylinder. The pusher block is used to push out the workpiece, and the pusher cylinder is used to control the movement of the pusher block.
[0013] By adopting the above technical solution, during the rejection process, the pusher cylinder controls the pusher block to move linearly, so that the pusher block can push the workpiece off the limit seat, thus avoiding the mixing of subsequent defective and finished products.
[0014] Preferably, it also includes a feeding assembly for feeding the workpiece with screws screwed on.
[0015] By adopting the above technical solution, after the screw is installed on the workpiece, the workpiece can be unloaded using the unloading assembly, so that the workpiece leaves the limiting seat.
[0016] Preferably, the unloading assembly includes a clamping component, a lifting component, a translating component, and an unloading track. The unloading track is close to the rotary table and is inclined downwards. The clamping component is connected to the lifting component and is used to clamp the workpiece. The lifting component is used to control the up and down movement of the clamping component. The translating component is connected to the lifting component and is used to control the horizontal movement of the lifting component and the clamping component. The unloading track is located on the movement path of the clamping component.
[0017] By adopting the above technical solution, during unloading, the lifting component first controls the clamping component to move downward, so that the clamping component clamps the workpiece. Then, the lifting component is controlled to move upward. Then, the translation component controls the entire lifting component and clamping component to move horizontally, so that the clamping component moves above the unloading track. Subsequently, the clamping component releases its clamping force on the workpiece, allowing the workpiece to fall onto the unloading track. Under the guidance of the unloading track, the workpiece is centrally collected and stored.
[0018] Preferably, the gripping component is a gripper cylinder.
[0019] By adopting the above technical solution, the clamping and releasing of the workpiece is achieved by relying on the clamping jaws of the clamping cylinder.
[0020] Preferably, the outer surface of the feeding track is provided with an elastic layer.
[0021] By adopting the above technical solution, the elastic layer has good elasticity, which can reduce the damage to the workpiece during the slippage process.
[0022] Preferably, the limiting seat is detachably connected to the rotating platform.
[0023] By adopting the above technical solution, the limit seat can be replaced when it is damaged.
[0024] In summary, this application includes at least one of the following beneficial technical effects:
[0025] (1) By setting up a detection component and a rejection component, the detection component can detect whether there are screws on the workpiece. If there are no screws between the first detection head and the second detection head, the detection component will transmit the signal to the rejection component to reject the workpiece that is missing screws, so as to avoid the subsequent mixing of finished products and defective products.
[0026] (2) By setting up the feeding component, after the screw is installed on the workpiece, the feeding component can be used to feed the workpiece, so that the workpiece leaves the limit seat.
[0027] (3) By setting an elastic layer on the outer surface of the feeding track, the elastic layer can play a buffering role, thereby reducing the damage to the workpiece during the slippage process. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the structure of the testing mechanism in the embodiments of this application;
[0029] Figure 2 This is a partial structural schematic diagram of the testing mechanism in the embodiments of this application;
[0030] Figure 3 This is a schematic diagram of the positioning seat in an embodiment of this application;
[0031] Figure 4 This is a schematic diagram of the feeding component in an embodiment of this application.
[0032] Reference numerals in the attached drawings: 1. Rotary table; 2. Limiting seat; 3. Detection component; 31. Fixed seat; 32. First cylinder; 33. First detection head; 34. Second cylinder; 35. Second detection head; 4. Rejection component; 41. Pushing cylinder; 42. Pushing block; 5. Support table; 6. Automatic screw tightening machine; 7. Unloading component; 71. Clamping part; 72. Lifting part; 73. Translation part; 74. Unloading track. Detailed Implementation
[0033] The technical solutions of this application will now be described with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can be embodied in many different forms and is not limited to the embodiments described herein.
[0034] In the representation of this application, the reference to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a specific feature, structure, material, or characteristic represented in connection with that embodiment or example is included in at least one embodiment or example of this application. Moreover, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples.
[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.
[0036] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection; a detachable connection; an integral part; or a mechanical connection. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.
[0037] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Without conflict, those skilled in the art can combine and integrate the different embodiments or examples shown in this application, as well as the features of those embodiments or examples.
[0038] This application discloses a screw detection mechanism. (Refer to...) Figures 1 to 3 The inspection mechanism includes a rotary table 1, a limiting seat 2, an inspection component 3, and a rejection component 4. The rotary table 1 is rotatable, and its rotation axis is vertical. The limiting seats 2 are mounted on the table surface of the rotary table 1 and are distributed circumferentially around the rotary table 1. Limiting grooves are formed on the limiting seats 2 to limit the workpiece, and a portion of the limiting seats 2 extends outside the table surface of the rotary table 1. In some embodiments, the limiting seats 2 are detachably connected to the rotary table 1 by bolt fastening. When the limiting seats 2 are damaged, they can be replaced.
[0039] The detection assembly 3 is located on one side of the rotary table 1 and is used to detect screws on the workpiece. The detection assembly 3 includes a fixed base 31, a first cylinder 32, a first detection head 33, a second cylinder 34, and a second detection head 35. The first cylinder 32 and the second cylinder 34 are both mounted on the fixed base 31. The first detection head 33 is connected to the piston rod of the first cylinder 32, and the second detection head 35 is mounted on the piston rod of the second cylinder 34. The first detection head 33 is located above the second detection head 35. The first detection head 33 and the second detection head 35 are vertically opposite each other and both move in the vertical direction. The first detection head 33 and the second detection head 35 are used to detect both ends of the screw.
[0040] The rejection assembly 4 is mounted on the limiting seat 2 and is used to reject workpieces missing screws. The rejection assembly 4 includes a pusher cylinder 41 and a pusher block 42. The pusher cylinder 41 is mounted on the limiting seat 2, and the pusher block 42 is slidably connected to the limiting seat 2 and connected to the pusher cylinder 41. The pusher block 42 moves along the outer edge of the limiting seat 2. The pusher block 42 is used to push the workpiece off the limiting seat 2, and the pusher cylinder 41 is used to control the reciprocating movement of the pusher block 42.
[0041] During the production process, the workpiece is placed in the limiting groove of the limiting seat 2 using manual or automated equipment, while an automatic screw feeder delivers screws onto the workpiece. As the rotary table 1 rotates, the limiting seat 2, which holds the workpiece and screws, moves to a position close to the detection component 3.
[0042] Next, the first cylinder 32 is activated, controlling the first detection head 33 to move downwards and press against one end of the screw; simultaneously, the second cylinder 34 is activated, controlling the second detection head 35 to move upwards and press against the other end of the screw. Displacement sensors are installed on both the first and second detection heads 33 and 35. If the workpiece is missing a screw, there is no screw between the first and second detection heads 33 and 35, so the distance between them cannot be detected. The detection component 3 then transmits a signal to the rejection component 4, rejecting the workpiece lacking a screw. During rejection, the pusher cylinder 41 controls the pusher block 42 to move linearly, allowing the pusher block 42 to push the workpiece off the limit seat 2, preventing subsequent mixing of finished and defective products.
[0043] Specifically, a support platform 5 is installed above the rotary table 1, and an automatic screw tightening machine 6 is installed on the support platform 5. The automatic screw tightening machine 6 is used to tighten screws onto the workpiece to achieve automated production.
[0044] Combination Figure 1 and Figure 4 In addition, a feeding assembly 7 is installed on the support platform 5. The feeding assembly 7 is used to feed the workpiece with the screws screwed on. After the screws are installed on the workpiece by the automatic screw tightening machine 6, the feeding assembly 7 can be used to feed the workpiece, so that the workpiece leaves the limit seat 2.
[0045] The unloading assembly 7 includes a clamping component 71, a lifting component 72, a translating component 73, and an unloading track 74. One end of the unloading track 74 is close to the outer edge of the rotary table 1 and is inclined downwards. The clamping component 71 is connected to the lifting component 72 and is used to clamp the workpiece. In this embodiment, the clamping component 71 is a gripper cylinder. The lifting component 72 is a lifting cylinder and is used to control the up and down movement of the gripper cylinder. The translating component 73 is connected to the lifting component 72 and is used to control the horizontal movement of the lifting component 72 and the clamping component 71. The translating component 73 is a linear cylinder, and the unloading track 74 is located on the path of the clamping component 71.
[0046] During unloading, the lifting component 72 is first used to control the gripping component 71 to move downward, so that the gripping component 71 clamps the workpiece. Then, the lifting component 72 is controlled to move upward. Then, the translation component 73 is used to control the entire lifting component 72 and the gripping component 71 to move horizontally, so that the gripping component 71 moves above the unloading track 74. Then, the gripping component 71 releases the clamping force on the workpiece, so that the workpiece falls onto the unloading track 74. Under the guidance of the unloading track 74, the workpiece is collected and stored in a centralized manner.
[0047] The outer surface of the feeding track 74 is also equipped with an elastic layer made of materials such as sponge or foam. The elastic layer has good elasticity and cushioning properties, which can reduce the damage to the workpiece during the sliding process.
[0048] The implementation principle of a screw detection mechanism according to an embodiment of this application is as follows: During the production process, the workpiece is accurately placed in the limiting groove of the limiting seat 2 by manual operation or automated equipment, and at the same time, the screw is accurately conveyed onto the workpiece by an automatic screw feeder. As the rotary table 1 rotates, the limiting seat 2 carrying the workpiece and screw will move to the vicinity of the detection component 3.
[0049] Subsequently, the first cylinder 32 is activated, controlling the first detection head 33 to move downwards and press against one end of the screw; simultaneously, the second cylinder 34 is activated, controlling the second detection head 35 to move upwards and contact the other end of the screw. Both the first and second detection heads 33 and 35 are equipped with displacement sensors. If the workpiece is missing a screw, the first and second detection heads 33 and 35 will not be able to sense the screw's presence, thus failing to detect the distance to the screw. The detection component 3 transmits this signal to the rejection component 4, which rejects the workpiece lacking a screw. During rejection, the pusher cylinder 41 is activated, controlling the pusher block 42 to move linearly, pushing the workpiece out of the limit seat 2, ensuring that finished products and defective products are not mixed up.
[0050] 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 detection mechanism, characterized in that, The device includes a rotating table (1), a limiting seat (2), a detection component (3), and a rejection component (4). The rotating table (1) is rotatably mounted. The limiting seats (2) are located on the rotating table (1) and are distributed at intervals along the circumference of the rotating table (1). The limiting seats (2) have limiting grooves for limiting the workpiece. A part of the limiting seats (2) is located outside the table surface of the rotating table (1). The detection component (3) is located on one side of the rotating table (1) and is used to detect screws on the workpiece. The detection component (3) includes a fixed base (31), a first cylinder (32), and a first detection... The first cylinder (32) and the second cylinder (34) are located on the fixed base (31). The first detection head (33) is located on the first cylinder (32), and the second detection head (35) is located on the second cylinder (34). The first detection head (33) and the second detection head (35) are vertically opposite each other and both move in the vertical direction. The first detection head (33) and the second detection head (35) are used to detect both ends of the screw. The rejection component (4) is located on the limiting seat (2) and is used to reject workpieces that are missing screws.
2. The screw detection mechanism according to claim 1, characterized in that, It also includes an automatic screw tightening machine (6), with a support platform (5) above the rotary table (1). The automatic screw tightening machine (6) is located on the support platform (5) and is used to tighten screws onto the workpiece.
3. The screw detection mechanism according to claim 1, characterized in that, The rejection assembly (4) includes a pusher cylinder (41) and a pusher block (42). The pusher cylinder (41) is mounted on the limiting seat (2). The pusher block (42) is slidably connected to the limiting seat (2) and connected to the pusher cylinder (41). The pusher block (42) is used to push out the workpiece, and the pusher cylinder (41) is used to control the movement of the pusher block (42).
4. A screw detection mechanism according to claim 2, characterized in that, It also includes a feeding assembly (7) for feeding the workpiece with screws screwed on.
5. A screw detection mechanism according to claim 4, characterized in that, The unloading assembly (7) includes a clamping component (71), a lifting component (72), a translating component (73), and an unloading track (74). The unloading track (74) is close to the rotary table (1) and is inclined downward. The clamping component (71) is connected to the lifting component (72) and is used to clamp the workpiece. The lifting component (72) is used to control the clamping component (71) to move up and down. The translating component (73) is connected to the lifting component (72) and is used to control the lifting component (72) and the clamping component (71) to move horizontally. The unloading track (74) is located on the path of the clamping component (71).
6. A screw detection mechanism according to claim 5, characterized in that, The clamping component (71) is a gripper cylinder.
7. A screw detection mechanism according to claim 5, characterized in that, The outer surface of the feeding track (74) is provided with an elastic layer.
8. A screw detection mechanism according to claim 1, characterized in that, The limiting seat (2) is detachably connected to the rotating table (1).