A measuring device for screw inspection

Abstract

This utility model discloses a measuring device for screw detection, including a body and an industrial control integrated computer fixedly installed on the top of the body. A fixed frame is fixedly connected to one side of the top of the body, and a support frame is fixedly connected to one side of the outer surface of the fixed frame. An adjustable movable frame is installed on the support frame, and screw guide plates are fixedly connected to the top of both the adjustable movable frame and the top of the support frame. A movable material cutting component is installed at the discharge end of the two screw guide plates. A pneumatic material blocking component, a pneumatic material discharging component, and a pneumatic separation component are provided on the top of the two screw guide plates. In this utility model, by adopting a pure pneumatic scheme with multiple cylinders driving the material blocking, discharging, separation, and detection components, the original complex motor, electric push rod, and lead screw transmission structure is replaced, which greatly simplifies the mechanical structure, reduces manufacturing costs and failure rate, and facilitates maintenance, making it more suitable for large-scale deployment on production lines.

Description

Technical Field

[0001] This utility model relates to the field of screw detection technology, and in particular to a measuring device for screw detection. Background Technology

[0002] The head height of flange bolts is a critical dimension that directly affects the assembly quality and performance of the product. Traditional measurement methods mainly rely on general measuring tools such as calipers and micrometers for comparison or direct measurement. This method has significant drawbacks: it requires the operator to hold the bolt in one hand and operate the measuring tool in the other, which is not only inconvenient and labor-intensive, but also prone to measurement errors due to unstable hand grip, making it difficult to guarantee measurement efficiency and consistency.

[0003] To address the aforementioned issues, several automated or semi-automated measurement solutions have been proposed in the prior art. For example, Chinese utility model patent CN223243518U discloses a "hexagonal flange wood screw head height measuring device." This device clamps and fixes the screws using a groove and a positioning plate driven by a first electric push rod. A lifting assembly consisting of a servo motor and a unidirectional lead screw is used to adjust the measurement height. A second electric push rod laterally advances the measuring module, and finally, two measuring plates driven by a forward and reverse motor and a bidirectional lead screw are brought together for measurement. The reading is obtained via a pointer and a ruler.

[0004] While this solution achieves automatic screw clamping and measurement, freeing up operators' hands to some extent, it still has significant limitations:

[0005] First, the device's structure is overly complex. It integrates at least three sets of motors (servo motors and forward / reverse motors) and two sets of electric linear actuator drive systems, supplemented by numerous mechanical transmission and guiding structures such as lead screws, lead nuts, guide rails, and sliders. This complex structure inevitably leads to high manufacturing costs, numerous potential failure points, and significant difficulties and costs in subsequent maintenance, making it unsuitable for large-scale deployment and application on production sites.

[0006] Secondly, the testing efficiency is low. Measuring a single screw requires multiple sequential steps: clamping, lifting and adjusting, lateral feeding, measuring plate closing and measurement, and resetting after reading. The cumulative cycles of these series-connected motors result in a long measurement time for a single piece, making it difficult to meet the cycle time requirements of modern production lines for high-speed, high-volume testing. Efficiency improvements are primarily reflected in reducing manual labor rather than in increasing absolute measurement speed.

[0007] Therefore, we propose a measuring device for screw inspection. Utility Model Content

[0008] The purpose of this invention is to address the shortcomings of existing technologies by proposing a measuring device for screw detection.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a measuring device for screw detection, comprising a body and an industrial control integrated computer fixedly installed on the top of the body, a fixed frame fixedly connected to one side of the top of the body, a support frame fixedly connected to one side of the outer surface of the fixed frame, an adjustable movable frame installed on the support frame, and screw guide plates fixedly connected to the top of the adjustable movable frame and the top of the support frame.

[0010] The discharge ends of the two screw guide plates are jointly equipped with a movable material cutting assembly;

[0011] The top of the two screw guide plates is provided with a pneumatic baffle assembly, a pneumatic discharge assembly, and a pneumatic separation assembly;

[0012] A long seat is fixedly connected to the top of one side of the outer surface of the fixed frame. A lifting detection plate with force measurement function is installed on the long seat. A laser range sensor is fixedly connected to the top side of the long seat. The detection end of the laser range sensor passes through the long seat and matches the lifting detection plate with force measurement function.

[0013] Furthermore, the adjustable movable frame includes a handwheel, which is located on one side of the support frame. One end of the handwheel is fixedly connected to a screw, which passes through the support frame and is rotatably connected to it. The outer surface of the screw is threaded with the movable frame body, which is slidably fitted onto the outer surface of the support frame and fixedly connected to an adjacent screw guide plate. By rotating the handwheel to drive the screw, the movable frame body and one side guide plate can be moved smoothly, realizing rapid adjustment of the width of the screw conveying channel for different specifications.

[0014] Furthermore, the movable material cutting assembly includes two guide sleeves, which are fixedly connected to adjacent screw guide plates. An inclined plate is slidably connected to each adjacent side of the two guide sleeves, and the inclined plate is attached to the end of the screw guide plate. An L-shaped rod is fixedly connected to the bottom of each guide sleeve, and a movable seat is slidably connected to the outer surface of the L-shaped rod. The movable seat is fixedly connected to the adjacent inclined plate. A first cylinder is fixedly connected to the bottom of each screw guide plate located on one side of the fixed frame, and the movable end of the first cylinder is fixedly connected to the movable seat. Driven by a single first cylinder, the two inclined plates open and close synchronously through the linkage of the movable seat and the L-shaped rod, achieving a highly efficient sorting function that allows qualified products to slide out smoothly and unqualified products to be accurately rejected.

[0015] Furthermore, the pneumatic baffle assembly includes a second cylinder, the cylinder body of which passes through the fixed frame and is fixedly connected to the fixed frame. A baffle plate is fixedly connected to the drive end of the second cylinder, and the baffle plate slides in contact with two screw guide plates. The second cylinder directly drives the baffle plate to slide along the surface of the guide plates, which can be quickly removed after the test is completed, making way for the smooth discharge of the tested screws and ensuring the continuity and rhythm of the test process.

[0016] Furthermore, the pneumatic feeding assembly includes a third cylinder, the cylinder body of which passes through the fixed frame and is fixedly connected to the fixed frame. The driving end of the third cylinder is fixedly connected to a feeding plate, and the feeding plate slides in contact with two screw guide plates. The feeding plate driven by the third cylinder has a simple structure and moves quickly, and can control the feeding of only one screw to be tested at a time, providing a reliable guarantee for subsequent one-by-one testing and avoiding repeated measurements or missed measurements.

[0017] Furthermore, the pneumatic separation assembly includes a fourth cylinder, the cylinder body of which passes through the fixed frame and is fixedly connected to the fixed frame. The movable end of the fourth cylinder is detachably fixedly connected to a separator plate, and the separator plate slides in contact with two screw guide plates. The fourth cylinder drives the separator plate to insert into or exit the conveying track, which can effectively separate the screw at the front of the queue from the subsequent screws. At the same time, since the separator plate is detachably fixed, such as by bolts, it is easy to replace and remove to accommodate screws of different diameters.

[0018] Furthermore, the lifting detection plate with force measurement function includes a fifth cylinder, which is fixedly installed on the top of the long seat. The movable end of the fifth cylinder passes through the long seat and is fixedly connected to a pressure sensor. The detection end of the pressure sensor is fixedly connected to the detection plate body. A guide rod is fixedly connected to one side of the top of the detection plate body, and the guide rod passes through the long seat and is slidably connected to the long seat. The guide rod has a limiting function to ensure the vertical movement of the detection plate.

[0019] The beneficial effects of this utility model are:

[0020] 1. In use, this utility model adopts a pure pneumatic solution with multiple cylinders driving the material blocking, feeding, separating and detection components, replacing the original complex motor, electric push rod and lead screw transmission structure, which greatly simplifies the mechanical structure, reduces manufacturing costs and failure rate, and facilitates maintenance, making it more suitable for large-scale deployment on production lines.

[0021] 2. When in use, this utility model relies on the coordinated operation of various pneumatic components to realize the continuous operation of the entire process of automatic queuing, separation, release, detection and sorting of screws. It eliminates the time delay caused by the sequential operation of multiple motors in the original technology, significantly increases the number of inspections per hour, and meets the needs of high-speed production cycle. Attached Figure Description

[0022] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a first-person perspective three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the overall second-view three-dimensional structure of this utility model;

[0025] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle.

[0026] The attached figures are labeled as follows:

[0027] 1. Machine body; 2. Industrial control all-in-one computer; 3. Material baffle; 4. Support frame; 5. Screw guide plate; 6. Divider plate; 7. Guide rod; 8. Fifth cylinder; 9. Laser rangefinder sensor; 10. Long seat; 11. Second cylinder; 12. Fixed frame; 13. Inclined plate; 14. Fourth cylinder; 15. Third cylinder; 16. Handwheel; 17. Feed plate; 18. Pressure sensor; 19. Detection plate body; 20. Screw; 21. Movable frame body; 22. First cylinder; 23. Movable seat; 24. L-shaped rod; 25. Guide sleeve. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figures 1-3As shown, a measuring device for screw inspection is disclosed, comprising a body 1 and an industrial control all-in-one computer 2 fixedly mounted on the top of the body 1. The computer can be an Advantech ARK-3500 series with a 12.1-inch touchscreen and a built-in measurement control program. A fixed frame 12 is fixedly connected to one side of the top of the body 1, and a support frame 4 is fixedly connected to one side of the outer surface of the fixed frame 12. An adjustable movable frame is mounted on the support frame 4. Screw guide plates 5 are fixedly connected to the top of both the adjustable movable frame and the support frame 4. The adjustable movable frame includes a handwheel 16, which is located on one side of the support frame 4. A screw 20 is fixedly connected to one end of the handwheel 16, and the screw 20 passes through the support frame 4 and is rotatably connected to it. The outer surface of the screw 20 is threadedly fitted with a movable frame body 21, which slidably fits onto the outer surface of the support frame 4 and is fixedly connected to the adjacent screw guide plate 5. The helix angle of the screw 20 is less than the friction angle, giving the screw 20 a self-locking capability and preventing it from shifting due to vibration or load.

[0030] The discharge ends of the two screw guide plates 5 are jointly equipped with a movable cutting assembly. The movable cutting assembly includes two guide sleeves 25, and the guide sleeves 25 are fixedly connected to the adjacent screw guide plates 5. The two guide sleeves 25 are slidably connected to the adjacent side of each other with inclined plates 13, and the inclined plates 13 are attached to the ends of the screw guide plates 5. The bottom of a single guide sleeve 25 is fixedly connected to an L-shaped rod 24, and the outer surface of the L-shaped rod 24 is slidably connected to a movable seat 23, and the movable seat 23 is fixedly connected to the adjacent inclined plate 13. The bottom of a single screw guide plate 5 located on one side of the fixed frame 12 is fixedly connected to a first cylinder 22, and the movable end of the first cylinder 22 is fixedly connected to the movable seat 23.

[0031] The top of the two screw guide plates 5 is equipped with a pneumatic baffle assembly, a pneumatic discharge assembly, and a pneumatic separator assembly. The pneumatic baffle assembly includes a second cylinder 11, the cylinder body of which passes through the fixing frame 12 and is fixedly connected to the fixing frame 12. A baffle plate 3 is fixedly connected to the drive end of the second cylinder 11, and the baffle plate 3 slides in contact with the two screw guide plates 5. The pneumatic discharge assembly includes a third cylinder 15, the cylinder body of which passes through the fixing frame 12 and is fixedly connected to the fixing frame 12. A discharge plate 17 is fixedly connected to the drive end of the third cylinder 15, and the discharge plate 17 slides in contact with the two screw guide plates. 5. The pneumatic separation assembly includes a fourth cylinder 14, the cylinder body of which passes through the fixed frame 12 and is fixedly connected to the fixed frame 12. The movable end of the fourth cylinder 14 is detachably fixedly connected to a separator plate 6, and the separator plate 6 slides in contact with two screw guide plates 5. In actual operation, the baffle plate 3, the discharge plate 17, and the separator plate 6 are never completely separated from the single screw guide plate 5 located on one side of the fixed frame 12, thereby ensuring that the screw guide plate 5 can limit the movement of the baffle plate 3, the discharge plate 17, and the separator plate 6, and ensuring the stability of the movement of the baffle plate 3, the discharge plate 17, and the separator plate 6.

[0032] A long seat 10 is fixedly connected to the top of one side of the outer surface of the fixed frame 12. The long seat 10 is equipped with a lifting detection plate with force measurement function. A laser rangefinder 9 is fixedly connected to the top side of the long seat 10. The laser rangefinder 9 can be a Keyence brand LK-G5000 series ultra-high precision model. The detection end of the laser rangefinder 9 passes through the long seat 10 and matches the lifting detection plate with force measurement function. The lifting detection plate with force measurement function includes a fifth cylinder 8, which is fixedly installed on the top of the long seat 10. The movable end of the fifth cylinder 8 passes through the long seat 10 and is fixedly connected to a pressure sensor 18. The pressure sensor 18 is used for force measurement. The model reference is ZCB511E-W. The detection end of the pressure sensor 18 is fixedly connected to the detection plate body 19. A guide rod 7 is fixedly connected to the top side of the detection plate body 19. The guide rod 7 passes through the long seat 10 and is slidably connected to the long seat 10.

[0033] The industrial control all-in-one computer 2 is electrically connected to the fifth cylinder 8, the laser rangefinder 9, the second cylinder 11, the fourth cylinder 14, the third cylinder 15, the pressure sensor 18, and the first cylinder 22, which facilitates the control of the overall operation.

[0034] Working principle: Two parallel screw guide plates 5 form a screw conveying channel, and their spacing can be adjusted by an adjustable movable frame to accommodate screws of different specifications.

[0035] The adjustable movable frame drives the screw 20 by rotating the handwheel 16, which causes the movable frame body 21 to slide along the support frame 4, thereby adjusting the position of the screw guide plate 5 on one side and realizing stepless adjustment of the channel width.

[0036] The random screws are arranged and output in an orderly manner by an existing vibratory feeder. The screws are conveyed along the track of the screw guide plate 5 until they are blocked by the pneumatic separation assembly.

[0037] The fourth cylinder 14 drives the partition plate 6 away from the fixed frame 12, blocking the subsequent screws from advancing, achieving initial queuing and positioning, and ensuring that only one screw is released at a time.

[0038] The third cylinder 15 drives the feeding plate 17 away from the fixed frame 12, blocking the screw from moving forward and achieving initial queuing and positioning.

[0039] The fourth cylinder 14 drives the partition plate 6 away from the fixed frame 12, separating the foremost screw from the subsequent screws. Then the third cylinder 15 drives the feeding plate 17 to move to one side of the fixed frame 12, realizing the feeding of a single screw.

[0040] The baffle plate 3 is located on top of the two screw guide plates 5 and can block the screws from passing through.

[0041] Next, the fifth cylinder 8 drives the pressure sensor 18 and the detection plate body 19 to descend, squeezing the screw head until the pressure sensor 18 detects that the pressure value reaches the threshold. Then, the laser range sensor 9 detects the moving distance of the detection plate body 19. By subtracting the moving distance of the detection plate body 19 from the distance from the detection plate body 19 to the screw guide plate 5, the thickness value of the screw head can be obtained. After the detection is completed, the fifth cylinder 8 resets.

[0042] The second cylinder 11 drives the baffle plate 3 to move to one side of the fixed frame 12, and the tested screw continues to move along the screw guide plate 5.

[0043] If the screw is qualified, it will slide out guided by the inclined plate 13; if the screw is unqualified, the first cylinder 22 will be activated, and the first cylinder 22 will push the movable seat 23 and the L-shaped rod 24 away from the screw guide plate 5, so that the inclined plate 13 moves along the guide sleeve 25 away from the screw guide plate 5, so that a large gap is created between the screw guide plate 5 and the inclined plate 13, allowing the screw to fall off, and then reset after a set time.

[0044] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A measuring device for screw inspection, comprising a body (1) and an integrated industrial control computer (2) fixedly mounted on the top of the body (1), characterized in that: A fixed frame (12) is fixedly connected to one side of the top of the body (1), and a support frame (4) is fixedly connected to one side of the outer surface of the fixed frame (12). An adjustable movable frame is installed on the support frame (4), and screw guide plates (5) are fixedly connected to the top of the adjustable movable frame and the top of the support frame (4). The discharge ends of the two screw guide plates (5) are jointly equipped with a movable material cutting assembly; The top of the two screw guide plates (5) is provided with a pneumatic baffle assembly, a pneumatic discharge assembly and a pneumatic separation assembly; A long seat (10) is fixedly connected to the top of one side of the outer surface of the fixed frame (12). The long seat (10) is equipped with a lifting detection plate with force measurement function. A laser range sensor (9) is fixedly connected to one side of the top of the long seat (10). The detection end of the laser range sensor (9) passes through the long seat (10) and matches the lifting detection plate with force measurement function.

2. The measuring device for screw detection according to claim 1, characterized in that: The adjustable movable frame includes a handwheel (16), which is located on one side of the support frame (4). One end of the handwheel (16) is fixedly connected to a screw (20), which passes through the support frame (4) and is rotatably connected to the support frame (4). The outer surface of the screw (20) is threaded with the movable frame body (21), which is slidably fitted on the outer surface of the support frame (4) and fixedly connected to the adjacent screw guide plate (5).

3. The measuring device for screw detection according to claim 1, characterized in that: The movable cutting assembly includes two guide sleeves (25), and the guide sleeves (25) are fixedly connected to adjacent screw guide plates (5). An inclined plate (13) is slidably connected to each of the two guide sleeves (25) on an adjacent side, and the inclined plate (13) is attached to the end of the screw guide plate (5). An L-shaped rod (24) is fixedly connected to the bottom of a single guide sleeve (25). A movable seat (23) is slidably connected to the outer surface of the L-shaped rod (24), and the movable seat (23) is fixedly connected to the adjacent inclined plate (13). A first cylinder (22) is fixedly connected to the bottom of a single screw guide plate (5) located on one side of the fixed frame (12), and the movable end of the first cylinder (22) is fixedly connected to the movable seat (23).

4. A measuring device for screw detection according to claim 1, characterized in that: The pneumatic baffle assembly includes a second cylinder (11), and the cylinder body of the second cylinder (11) is set through the fixed frame (12) and fixedly connected to the fixed frame (12). The drive end of the second cylinder (11) is fixedly connected to a baffle plate (3), and the baffle plate (3) slides in contact with two screw guide plates (5).

5. A measuring device for screw detection according to claim 1, characterized in that: The pneumatic feeding assembly includes a third cylinder (15), and the cylinder body of the third cylinder (15) is set through the fixed frame (12) and fixedly connected to the fixed frame (12). The driving end of the third cylinder (15) is fixedly connected to a feeding plate (17), and the feeding plate (17) slides in contact with two screw guide plates (5).

6. A measuring device for screw detection according to claim 1, characterized in that: The pneumatic separation assembly includes a fourth cylinder (14), and the cylinder body of the fourth cylinder (14) is set through the fixing frame (12) and fixedly connected to the fixing frame (12). The movable end of the fourth cylinder (14) is detachably fixedly connected to a partition plate (6), and the partition plate (6) slides in contact with two screw guide plates (5).

7. A measuring device for screw detection according to claim 1, characterized in that: The lifting detection plate with force measurement function includes a fifth cylinder (8), and the fifth cylinder (8) is fixedly installed on the top of the long seat (10). The movable end of the fifth cylinder (8) passes through the long seat (10) and is fixedly connected to a pressure sensor (18). The detection end of the pressure sensor (18) is fixedly connected to the detection plate body (19). A guide rod (7) is fixedly connected to one side of the top of the detection plate body (19), and the guide rod (7) passes through the long seat (10) and is slidably connected to the long seat (10).

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