Screw driving fool-proof device

Abstract

This utility model provides a screw-driving error-proof device, including a fixed base plate, a main electrical box fixedly installed on the top of the fixed base plate, a protective cover fixedly connected to the upper side of the main electrical box, a flip-up protective cover plate rotatably fitted between the two side plates of the protective cover, and multiple screw guide sleeves provided on the flip-up protective cover plate. A programmable controller is fixedly installed inside the main electrical box, and a flip-up locking cylinder that cooperates with the flip-up protective cover plate is also fixedly installed inside the main electrical box. By using a through-beam sensor to force products L and R to be correctly placed simultaneously, it avoids misprocessing of a single product. The adjustable height design and precise guiding function of the screw guide sleeves effectively prevent screws from being driven crooked. The signal linkage between the counter and the electric screwdriver ensures that the number of screws is properly tightened. Combined with the delay detection of the tightening delay timer, it avoids the problem of incomplete tightening. This multi-stage approach eliminates assembly defects and reduces the rate of defective products leaving the factory.

Description

Technical Field

[0001] This utility model relates to the field of industrial assembly equipment technology, specifically to a screw-driving error-proof device. Background Technology

[0002] Screw assembly is widely used in industrial product manufacturing, especially in the assembly of electronic components such as heat sinks. The accuracy of screw assembly directly affects product performance and quality. Currently, many factory production lines rely on manual operation of electric screwdrivers to fasten screws. Manual operation is prone to fatigue, leading to defects such as missing screws, misaligned screws, or loose screws. Defective products flowing to subsequent workstations require additional manpower and time for rework, significantly increasing production costs. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a screw-driving error-proof device to solve the problems mentioned in the background art. This utility model has a novel structure. It uses a through-beam sensor to force products L and R to be correctly placed simultaneously, avoiding misprocessing of a single product. The adjustable height design and precise guiding function of the screw guide sleeve effectively prevent screws from being driven crooked. The signal linkage between the counter and the electric screwdriver ensures that the number of screws is locked in place. Combined with the delay detection of the locking delay timer, it avoids the problem of not locking properly. It eliminates assembly defects from multiple stages and reduces the outflow rate of defective products.

[0004] To achieve the above objectives, this utility model employs the following technical solution: a screw-driving anti-mistake device, comprising a fixed base plate, a main electrical box fixedly mounted on the top of the fixed base plate, a vertical rod fixedly connected to one side of the main electrical box above the fixed base plate, an electric screwdriver bracket movably fitted on the vertical rod, an electric screwdriver fixedly mounted on the electric screwdriver bracket, a protective cover fixedly connected to the upper side of the main electrical box, a flip-top protective cover rotatably fitted between the two side plates of the protective cover, a plurality of screw guide sleeves provided on the flip-top protective cover, a programmable controller fixedly mounted inside the main electrical box, a flip-top locking cylinder cooperating with the flip-top protective cover fixedly mounted inside the main electrical box, and the flip-top locking cylinder and the electric screwdriver electrically connected to the programmable controller.

[0005] Furthermore, a first positioning fixture and a second positioning fixture are fixedly connected to the upper two sides of the main electrical box, and photoelectric sensors corresponding to the first positioning fixture and the second positioning fixture are fixedly connected to the upper two sides of the main electrical box. Product L and product R are respectively provided on the first positioning fixture and the second positioning fixture.

[0006] Furthermore, a start button is fixedly connected to the side of the main electrical box, and indicator lights are fixedly connected to both sides of the protective cover on the top of the main electrical box. A proximity switch that cooperates with the flip-up protective cover is fixedly installed on the upper side of the main electrical box inside the protective cover.

[0007] Furthermore, a counter, a locking delay timer, and a continuous-play delay timer are fixedly installed on the upper side of the main electrical box, and a three-prong plug is fixedly connected to the back of the main electrical box. The programmable controller is electrically connected to the indicator light, the counter, the locking delay timer, and the continuous-play delay timer.

[0008] Furthermore, both sides of the flip-up protective cover are fixedly connected to rotating shafts, and both sides of the protective cover are fixedly connected to connecting blocks that rotatably cooperate with the rotating shafts on both sides.

[0009] Furthermore, a first locking block is fixedly connected to the bottom of the flip-up protective cover, and a second locking block that cooperates with the first locking block is provided inside the protective cover. The output shaft of the flip-up locking cylinder is fixedly connected to a fixing block that is fixedly connected to the second locking block.

[0010] Furthermore, the upper side of the flip-up protective cover is provided with two sets of multiple mounting holes corresponding to product L and product R respectively. The screw guide sleeve is located in the mounting hole. A column is fixedly connected to one side of each mounting hole on the flip-up protective cover. The screw guide sleeve is provided with a through hole that slides with the column.

[0011] Furthermore, a limiting groove is formed through the inner wall of the through hole, and a limiting ring is slidably fitted on the inner wall of the limiting groove. A spring is fixedly connected between one side of the limiting ring and the inner wall of the limiting groove, and a pin is fixedly connected to the inner wall of the limiting ring. Multiple slots that cooperate with the pins are formed on the periphery of the column along its axial direction.

[0012] The beneficial effects of this utility model are:

[0013] 1. This screw-driving error-proof device uses a through-beam sensor to force product L and product R to be correctly placed simultaneously, avoiding misprocessing of a single product. The adjustable height design and precise guiding function of the screw guide sleeve effectively prevent screws from being driven crooked. The signal linkage between the counter and the electric screwdriver ensures that the number of screws is locked in place. Combined with the delay detection of the locking delay timer, it avoids the problem of not locking. It eliminates assembly defects from multiple stages and reduces the outflow rate of defective products.

[0014] 2. This screw-driving error-proof device simplifies the operation process and reduces the labor intensity of operators by automatically locking and unlocking the flip-over protective cover and detecting the position of the proximity switch. The protective cover and the flip-over protective cover form a closed processing space to prevent screws and debris from flying during the screw-driving process, protecting the safety of operators and improving the safety of the working environment. Through the targeted design of the first positioning fixture and the second positioning fixture, as well as the adjustable structure of the electric screwdriver bracket and screw guide sleeve, the device can be adapted to different models of products L and R, and is not only suitable for specific products such as heat sinks. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall front structure of the screw-driving error-proof device of this utility model;

[0016] Figure 2 This is a schematic diagram of the overall upper structure of the screw-driving error-proof device of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the flip-up protective cover of this utility model when it is flipped.

[0018] Figure 4 This utility model Figure 3 -Enlarged structural diagram at point A;

[0019] Figure 5 This is a schematic diagram of the internal structure of the main electrical box of this utility model;

[0020] Figure 6 This is an enlarged structural schematic diagram at point 5-B of the present invention;

[0021] Figure 7 This is a schematic diagram of the structure of the flip-up protective cover of this utility model;

[0022] Figure 8 This is an enlarged structural schematic diagram at point 7-C of this utility model;

[0023] Figure 9 This is a schematic diagram of the programmable controller circuit control of this utility model.

[0024] In the diagram: 1. Fixed base plate; 2. Main electrical box; 3. Upright pole; 4. Electric screwdriver bracket; 5. Electric screwdriver; 6. Protective cover; 7. Flip-over protective cover; 8. First positioning fixture; 9. Second positioning fixture; 10. Through-beam sensor; 11. Start button; 12. Indicator light; 13. Screw guide sleeve; 14. Proximity switch; 15. Counter; 16. Locking delay timer; 17. Continuous firing delay timer; 18. Triangular plug; 19. Product L; 20. Product R; 21. Programmable controller; 22. Rotating shaft; 23. Connecting block; 24. First locking block; 25. Second locking block; 26. Fixing block; 27. Flip-over locking cylinder; 28. Mounting hole; 29. ​​Upright column; 30. Through hole; 31. Limiting groove; 32. Limiting ring; 33. Spring; 34. Pin; 35. Slot. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] Please refer to Figures 1 to 9 This utility model provides a technical solution: a screw-driving error-proof device, including a fixed base plate 1, a main electrical box 2 fixedly installed on the top of the fixed base plate 1, a vertical rod 3 fixedly connected to one side of the main electrical box 2 above the fixed base plate 1, an electric screwdriver bracket 4 movably fitted on the vertical rod 3, an electric screwdriver 5 fixedly installed on the electric screwdriver bracket 4, a protective cover 6 fixedly connected to the upper side of the main electrical box 2, a flip-up protective cover 7 rotatably fitted between the two side plates of the protective cover 6, a plurality of screw guide sleeves 13 provided on the flip-up protective cover 7, a programmable controller 21 fixedly installed inside the main electrical box 2, a flip-up locking cylinder 27 that cooperates with the flip-up protective cover 7 fixedly installed inside the main electrical box 2, and the flip-up locking cylinder 27 and the electric screwdriver 5 electrically connected to the programmable controller 21.

[0027] In this embodiment, a first positioning fixture 8 and a second positioning fixture 9 are fixedly connected to the upper two sides of the main electrical box 2, respectively. A photoelectric sensor 10, corresponding to the first positioning fixture 8 and the second positioning fixture 9, is fixedly connected to both sides of the upper part of the main electrical box 2. Product L19 and product R20 are respectively mounted on the first positioning fixture 8 and the second positioning fixture 9. A start button 11 is fixedly connected to the side of the main electrical box 2. Indicator lights 12 are fixedly connected to both sides of the protective cover 6 on the upper part of the main electrical box 2. A proximity switch 14, which cooperates with the flip-up protective cover 7, is fixedly installed inside the protective cover 6 on the upper side of the main electrical box 2. A counter 15, a locking delay timer 16, and a continuous-fire delay timer 17 are fixedly installed on the upper side of the main electrical box 2, respectively. A three-prong plug 18 is fixedly connected to the back of the main electrical box 2. The programmable controller 21 is electrically connected to the indicator lights 12, the counter 15, the locking delay timer 16, and the continuous-fire delay timer 17.

[0028] Specifically, the device is connected to a power source via a three-prong plug 18 on the back, supplying power to internal electrical components such as the programmable controller 21 and the flip-top locking cylinder 27. The operator, based on the screw fastening requirements of products L19 and R20, presets the required number of screws to be fastened using the counter 15 on the upper side of the main electrical box 2. Simultaneously, the operator sets the delay detection duration after screw fastening using the tightening delay timer 16, and sets the interval judgment time for continuous screw fastening using the continuous delay timer 17. After completing the parameter configuration, the device enters a standby state, and the operator places products L19 and R20 respectively in the first positioning fixture 8 and the second positioning fixture 9 above the main electrical box 2. At this time, the through-beam sensors 10, which are set corresponding to the two positioning fixtures, will detect whether the products are correctly placed. If both products are accurately positioned, the through-beam sensors 10 will send a qualified signal to the programmable controller 21. If only a single product is placed or the product is not placed correctly, the through-beam sensors 10 will feed back an abnormal signal, and the device will remain in standby mode to avoid misoperation. After the through-beam sensors 10 feed back a qualified signal, the operator will rotate the flip-over protective cover 7 so that it rotates around the rotating shaft 22 inside the connecting block 23 on both sides of the protective cover 6 until it covers the protective cover 6. During the process, the proximity switch 14 located inside the protective cover 6 on the upper side of the main electrical box 2 will detect whether the flip-over protective cover 7 is closed in place. If it is closed, the proximity switch 14 will send a signal to the programmable controller 21, and the controller will then instruct the flip-over locking cylinder 27 to act. Its output shaft will push the fixing block 26 to move the second locking block 25, so that the second locking block 25 engages with the first locking block 24 at the bottom of the flip-over protective cover 7, thereby automatically locking the cover and preventing the cover from being accidentally opened during the locking process.

[0029] In this embodiment, rotating shafts 22 are fixedly connected to both sides of the flip-up protective cover 7, and connecting blocks 23 that rotatably engage with the rotating shafts 22 are fixedly connected to both sides of the protective cover 6. A first locking block 24 is fixedly connected to the bottom of the flip-up protective cover 7, and a second locking block 25 that engages with the first locking block 24 is provided inside the protective cover 6. A fixing block 26 that is fixedly connected to the second locking block 25 is fixedly connected to the output shaft of the flip-up locking cylinder 27. Two sets of mounting holes 28 corresponding to products L19 and R20 are respectively opened downward through the upper side of the flip-up protective cover 7. The screw guide sleeve 13 is located inside the mounting hole 28. Each mounting hole 28 on the flip-up protective cover 7 is fixedly connected to one side of a column 29. The screw guide sleeve 13 is provided with a through hole 30 that slides with the column 29. The inner wall of the through hole 30 extends outward to form a limiting groove 31. The inner wall of the limiting groove 31 slides with a limiting ring 32. A spring 33 is fixedly connected between one side of the limiting ring 32 and the inner wall of the limiting groove 31. A pin 34 is fixedly connected to the inner wall of the limiting ring 32. The periphery of the column 29 is provided with a plurality of slots 35 arranged along its axial direction that cooperate with the pins 34.

[0030] Specifically, the screw guide sleeve 13, through the cooperation of the column 29 and the pin 34 (the pin 34 can slide along the limiting groove 31 and be inserted into different slots 35 of the column 29 under the action of the spring 33, so as to realize the height adjustment of the guide sleeve), ensures that the screw is accurately aligned with the product locking hole. After each screw is locked, the electric screwdriver 5 sends a torque signal and a locking signal to the programmable controller 21. The counter 15 simultaneously counts the actual number of screws locked, and the locking delay timer 16 performs a delay detection on the locking status of each screw to determine whether there is any loose screw.

[0031] Before using the screw-driving error-proof device, first connect the power supply through the triangular plug 18 on the back of the device to power all electrical components such as the internal programmable controller 21 and the flip-top locking cylinder 27. The operator presets the required number of screws to be tightened on the counter 15 on the upper side of the main electrical box 2 according to the screw-tightening requirements of the products L19 and R20 to be processed. Simultaneously, the operator sets the delay detection time after screw tightening using the tightening delay timer 16, and sets the interval judgment time for continuous screw tightening using the continuous tightening delay timer 17. After completing the parameter configuration, the device enters the standby state. Then, the operator places products L19 and R20 respectively in the first positioning fixture 8 and the second positioning fixture 9 above the main electrical box 2. At this time, the photoelectric sensors 10 corresponding to the two positioning fixtures will detect whether the products are... If both products are correctly positioned, the through-beam sensor 10 sends a pass signal to the programmable controller 21. If only one product is placed or the product is not placed correctly, the through-beam sensor 10 sends an abnormal signal, and the device remains in standby mode. After the through-beam sensor 10 sends a pass signal, the operator rotates the flip-over protective cover 7, causing it to rotate around the rotating shaft 22 inside the connecting block 23 on both sides of the protective cover 6 until it covers the protective cover 6. The proximity switch 14 located inside the protective cover 6 on the upper side of the main electrical box 2 detects that the flip-over protective cover 7 is closed and sends a signal to the programmable controller 21. The controller then instructs the flip-over locking cylinder 27 to act, and its output shaft pushes the fixing block 26 to move the second locking block 25, so that the second locking block 25 engages with the first locking block 24 at the bottom of the flip-over protective cover 7, thereby automatically locking the cover. Afterwards, the operator presses the start button 11 on the side of the main electrical box 2, holds the electric screwdriver 5 on the electric screwdriver bracket 4 (which can be adjusted along the upright 3), aligns it with the screw guide sleeve 13 in the mounting hole 28 of the flip-up protective cover 7 (the screw guide sleeve 13 can be adjusted in height by engaging the upright 29 with the pin 34 and engaging with the spring 33 into different slots 35 of the upright 29), and begins to tighten the screws. Each time a screw is tightened, the electric screwdriver 5 sends a torque signal and a tightening signal to the programmable controller 21. The counter 15 simultaneously counts the actual number of screws tightened, and the tightening delay timer 16 performs a delay detection on the tightening status of each screw. When the counter 15 counts the actual number of screws tightened... When the number of screws fastened reaches the preset value, and neither the tightening delay timer 16 nor the continuous delay timer 17 detects any abnormalities, the programmable controller 21 determines that the screw fastening is qualified, the instruction indicator light 12 lights up green, and at the same time controls the flip-top locking cylinder 27 to reverse its movement, releasing the cover lock. The operator opens the flip-top protective cover 7, takes out product L19 and product R20, and the device resets to enter the next work cycle. If the product is not placed correctly, screws are missing, not tightened, or are crooked, the instruction indicator light 12 of the programmable controller 21 lights up red and triggers the warning mechanism. After the operator has checked and dealt with the abnormality, the device can be restarted to resume operation.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A screw-driving anti-foolproof device, comprising a fixed base plate (1), characterized in that: A main electrical box (2) is fixedly installed above the fixed base plate (1). A pole (3) is fixedly connected to one side of the main electrical box (2) above the fixed base plate (1). An electric screwdriver bracket (4) is movably fitted on the pole (3). An electric screwdriver (5) is fixedly installed on the electric screwdriver bracket (4). A protective cover (6) is fixedly connected to the upper side of the main electrical box (2). A flip-top protective cover (7) is rotatably fitted between the two side plates of the protective cover (6). Multiple screw guide sleeves (13) are provided on the flip-top protective cover (7). A programmable controller (21) is fixedly installed inside the main electrical box (2). A flip-top locking cylinder (27) that cooperates with the flip-top protective cover (7) is fixedly installed inside the main electrical box (2). The flip-top locking cylinder (27) and the electric screwdriver (5) are electrically connected to the programmable controller (21).

2. The screw-driving error-proof device according to claim 1, characterized in that: The main electrical box (2) is fixedly connected to the upper two sides of the first positioning fixture (8) and the second positioning fixture (9). The main electrical box (2) is fixedly connected to the upper two sides of the first positioning fixture (8) and the second positioning fixture (9) respectively. The first positioning fixture (8) and the second positioning fixture (9) are respectively provided with product L (19) and product R (20).

3. The screw-driving error-proof device according to claim 2, characterized in that: A start button (11) is fixedly connected to the side of the main electrical box (2). Indicator lights (12) are fixedly connected to both sides of the protective cover (6) on the top of the main electrical box (2). A proximity switch (14) that cooperates with the flip-up protective cover (7) is fixedly installed inside the protective cover (6) on the upper side of the main electrical box (2).

4. The screw-driving error-proof device according to claim 3, characterized in that: The main electrical box (2) is fixedly installed with a counter (15), a locking delay timer (16) and a continuous delay timer (17) on its upper side. A three-prong plug (18) is fixedly connected to the back of the main electrical box (2). The programmable controller (21) is electrically connected to the indicator light (12), the counter (15), the locking delay timer (16) and the continuous delay timer (17).

5. The screw-driving error-proof device according to claim 4, characterized in that: The flip-up protective cover (7) is fixedly connected to a rotating shaft (22) on both sides, and the protective cover (6) is fixedly connected to a connecting block (23) that rotates with the rotating shaft (22) on both sides.

6. The screw-driving error-proof device according to claim 5, characterized in that: The bottom of the flip-up protective cover (7) is fixedly connected to a first locking block (24), and the inside of the protective cover (6) is provided with a second locking block (25) that cooperates with the first locking block (24). The output shaft of the flip-up locking cylinder (27) is fixedly connected to a fixing block (26) that is fixedly connected to the second locking block (25).

7. The screw-driving error-proof device according to claim 6, characterized in that: The upper side of the flip-up protective cover (7) is provided with two sets of multiple mounting holes (28) corresponding to product L (19) and product R (20) respectively. The screw guide sleeve (13) is located in the mounting hole (28). A column (29) is fixedly connected to one side of each mounting hole (28) on the flip-up protective cover (7). The screw guide sleeve (13) is provided with a through hole (30) that slides with the column (29).

8. The screw-driving error-proof device according to claim 7, characterized in that: The inner wall of the through hole (30) extends outward through a limiting groove (31). The inner wall of the limiting groove (31) is slidably fitted with a limiting ring (32). A spring (33) is fixedly connected between one side of the limiting ring (32) and the inner wall of the limiting groove (31). A pin (34) is fixedly connected to the inner wall of the limiting ring (32). The periphery of the column (29) is provided with multiple slots (35) that cooperate with the pins (34) along its axial direction.

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