Automatic detection of stopper trim cover
By combining a CCD detection device and a photoelectric sensor, automated detection of the limiter cover is achieved, solving the problems of low efficiency and error-proneness of manual detection, and improving detection accuracy and the degree of automation of data recording.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI INJELIC MOULD PROD CO LTD
- Filing Date
- 2025-05-09
- Publication Date
- 2026-04-21
AI Technical Summary
The quality inspection of the limiter cover after injection molding relies on manual visual inspection, which is inefficient, error-prone, and prone to missed inspections, and cannot provide accurate production data support.
The limiter cover is automatically detected using a CCD detection device and a photoelectric sensor. Combined with a counter and sensor, it achieves automated detection and data recording, ensuring the accuracy and efficiency of the detection.
It has achieved automated inspection of limiter covers, improved inspection accuracy, avoided missed inspections, accurately recorded the number of qualified and unqualified products, reduced manual intervention, and improved the data support capability for production planning.
Smart Images

Figure CN224142893U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of limiter cover production technology, and specifically relates to automatic detection of limiter covers. Background Technology
[0002] Injection-molded limiters are mechanical devices used to limit or control the range of motion of objects. They are commonly used in equipment such as automobiles and cranes to ensure safe and smooth operation. In automobiles, door limiters limit the opening angle of the door, preventing the outer door panel from colliding with the vehicle body and ensuring the convenience and safety of passengers getting on and off the vehicle. In cranes, various limiters, such as lifting capacity limiters and torque limiters, prevent the equipment from operating under overload conditions and avoid accidents.
[0003] In the production process of limiter covers, the quality inspection of the injection-molded products is crucial. Currently, the inspection of limiter covers after injection molding relies heavily on visual inspection by operators. Due to the small size of the products, operation is inconvenient during inspection, and blind spots are easily created. At the same time, due to factors such as operator condition and experience, defects such as insufficient or excessive materials are easily missed. In addition, manual counting is inefficient and prone to errors, and cannot provide accurate data support for production planning.
[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content
[0005] To solve the above-mentioned technical problems, this utility model provides an automatic detection system for limiter covers, including a frame, a worktable on the frame, a fixed seat on the worktable, a fixed bracket and a placement seat on the fixed seat, the placement seat for placing the limiter cover, and the upper surface of the placement seat can be tightly fitted with the lower surface of the limiter cover, a CCD detection device is installed on the fixed bracket and is located directly above the placement seat, a photoelectric sensor is installed on the fixed seat and corresponds to the placement seat so that the photoelectric sensor is located below the limiter cover and the sensing part of the photoelectric sensor corresponds to the lower surface of the limiter cover, the photoelectric sensor is used to detect whether the limiter cover on the placement seat is placed accurately, a counter is installed on the frame and the counter is electrically connected to the CCD detection device.
[0006] An NG box is installed on the lower surface of the workbench, and there are placement slots on the surface of the workbench, which are connected to the inside of the NG box.
[0007] A second photoelectric sensor is installed on the lower surface of the workbench and is located inside the NG box. The second photoelectric sensor is used to detect the number of limit cover that enter the NG box from the placement slot. The second photoelectric sensor is electrically connected to the counter.
[0008] The rack is equipped with a computer host and a display screen. The computer host is electrically connected to both the display screen and the CCD detection device so that the display screen can display the detection data from the CCD detection device.
[0009] The frame is equipped with two double-hole button boxes. From left to right, they are a manual / automatic button, a two-hand start button, a two-hand start button, and a buzzer. The two-hand start button is used to control the opening and closing status of the CCD detection device, and the buzzer can sound an alarm when the CCD detection device detects a defect.
[0010] The CCD detection device is slidably mounted on a fixed frame.
[0011] The NG box has an openable door on one side.
[0012] This utility model has the following beneficial effects:
[0013] This invention utilizes a CCD detection device to inspect the limiter cover. When the limiter cover is found to be qualified, it is manually unloaded and transported to the subsequent process, while a counter records the number of qualified products. When the CCD detection device detects a defective limiter cover, a buzzer sounds an alarm, reminding the operator to remove it from the placement slot and drop it into the NG box. As the limiter cover is dropped into the NG box, a photoelectric sensor detects it and sends the data to the counter, incrementing the defective quantity. This allows the device to automatically and accurately inspect the limiter cover, eliminating the need for manual inspection, improving accuracy, preventing missed inspections, and automatically recording the number of qualified and defective products in the batch.
[0014] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0016] Figure 2 This is the second three-dimensional structural schematic diagram of the present invention;
[0017] Figure 3 This is a top-view structural schematic diagram of the present invention;
[0018] Figure 4 For the present utility model Figure 3 A magnified view of the structure at point A in the middle;
[0019] Figure 5 This is a schematic diagram of the internal structure of the NG box of this utility model.
[0020] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Workbench; 3. Mounting base; 4. Mounting frame; 5. Placement base; 6. CCD detection device; 7. Photoelectric sensor one; 8. Counter; 9. NG box; 10. Placement slot; 11. Photoelectric sensor two; 12. Computer host; 13. Display screen; 14. Double-hole button box; 15. Box door. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-5 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.
[0022] Please see Figure 1 , Figure 2 , Figure 4 As shown:
[0023] This embodiment provides an automatic detection system for limiter covers, including a frame 1, a worktable 2 on the frame 1, a fixed base 3 on the worktable 2, a fixed frame 4 and a placement seat 5 on the fixed base 3. The placement seat 5 is used to place the limiter cover, and the upper surface of the placement seat 5 can be tightly fitted with the lower surface of the limiter cover. A CCD detection device 6 is installed on the fixed frame 4, and the CCD detection device 6 is located directly above the placement seat 5. A photoelectric sensor 7 is installed on the fixed base 3, and the photoelectric sensor 7 corresponds to the placement seat 5 so that the photoelectric sensor 7 is located below the limiter cover, and the sensing part of the photoelectric sensor 7 corresponds to the lower surface of the limiter cover. The photoelectric sensor 7 is used to detect whether the limiter cover on the placement seat 5 is placed accurately. A counter 8 is installed on the frame 1, and the counter 8 is electrically connected to the CCD detection device 6.
[0024] In practical use, the operator places the limiter cover on the upper surface of the placement seat 5. The upper surface of the placement seat 5 can perfectly fit the limiter cover, allowing it to be placed stably on the placement seat 5. The photoelectric sensor can detect whether the limiter cover is placed correctly, improving the placement accuracy. After the limiter cover is placed accurately, the CCD detection device 6 is activated to perform image comparison detection on the limiter cover placed on the placement seat 5, taking comprehensive pictures of its inner and outer rings to detect any defects. This accurately detects the pass and fail rates of the limiter cover. The counter 8 can accurately detect the number of pass and fail limiter covers. Thus, this device can automatically and accurately detect the limiter cover, eliminating the need for manual inspection, improving the detection accuracy, avoiding missed detections, and automatically recording the number of pass and fail products in this batch.
[0025] like Figure 1 , Figure 2 , Figure 5 As shown, an NG box 9 is installed on the lower surface of the workbench 2. A placement slot 10 is located on the surface of the workbench 2, and the placement slot 10 is connected to the inside of the NG box 9. A photoelectric sensor 2 11 is installed on the lower surface of the workbench 2, and the photoelectric sensor 2 11 is located inside the NG box 9. The photoelectric sensor 2 11 is used to detect the number of limiter covers entering the NG box 9 from the placement slot 10. The photoelectric sensor 2 11 is electrically connected to the counter 8. When the CCD detection device 6 detects that the limiter cover is qualified, it is manually unloaded and transported to the subsequent process. The unqualified products detected can be dropped from the placement slot 10 into the NG box 9 for centralized collection. When the limiter cover is dropped from the placement slot 10 into the NG box 9, the photoelectric sensor 2 11 can sense the limiter cover, and the photoelectric sensor sends the sensing data to the counter 8, which increments the number of unqualified products by one.
[0026] like Figure 1 , Figure 2 As shown, a computer host 12 and a display screen 13 are installed on the rack 1. The computer host 12 is electrically connected to the display screen 13 and the CCD detection device 6, so that the display screen 13 can display the detection data of the CCD detection device 6. The data captured by the CCD detection device 6 can be synchronously transmitted to the display screen 13, so that the staff can easily view the detection data and results.
[0027] like Figure 1-3As shown, two double-hole button boxes 14 are installed on the frame 1. From left to right, they are a manual / automatic button, a two-hand start button, a two-hand start button, and a buzzer. The two-hand start button is used to control the opening and closing state of the CCD detection device 6. The buzzer can sound an alarm when the CCD detection device 6 detects a defect. The manual / automatic button is used to change the device to automatic or manual detection mode. After the limiter cover has been placed in place on the placement seat 5, the operator presses the two-hand start button with both hands at the same time to start the CCD detection device 6 to perform the detection operation. This avoids the CCD detection device 6 performing the detection operation when the limiter cover is not in place, thus avoiding false detection. When the CCD detection device 6 detects that the limiter cover is defective, the buzzer will sound an alarm to remind the operator to remove it and put it into the NG box 9.
[0028] like Figure 1 As shown, the CCD detection device 6 is movably mounted on the fixed frame 4 so that when the detection distance of the CCD detection device 6 cannot clearly determine the condition of the surface of the limiter cover, the detection distance can be adjusted by changing the distance of the CCD detection device 6 on the fixed frame 4, thereby improving applicability. It is also convenient to disassemble and assemble when the CCD detection device 6 needs to be repaired.
[0029] like Figure 2 As shown, an openable door 15 is installed on one side of the NG box 9. When it is necessary to remove the defective limiter cover inside the NG box 9, it can be removed by opening the door 15.
[0030] The working principle of the automatic detection of limiter covers provided by this utility model is as follows: The operator places the limiter cover on the upper surface of the placement seat 5. The photoelectric sensor can detect whether it is placed in place, so that the limiter cover is stably placed on the placement seat 5. At this time, the operator presses the two-hand start button on the double-hole button box 14 to start the CCD detection device 6 to detect the limiter cover. When the limiter cover is detected as qualified, it is manually unloaded and conveyed to the subsequent process. The counter 8 will record the number of qualified data. When the CCD detection device 6 detects unqualified limiter covers, the buzzer sounds. An alarm will be triggered, reminding the operator to remove the cover and drop it from the placement slot 10 into the NG box 9. When the limiter cover is dropped into the NG box 9, the photoelectric sensor 11 can detect the limiter cover, and the photoelectric sensor sends the sensing data to the counter 8, which increments the number of defective products. Thus, the device can automatically and accurately detect the limiter cover, eliminating the need for manual inspection, improving the accuracy of the detection, avoiding missed detections, and automatically recording the quantity, accurately recording the number of qualified and unqualified products in this batch.
[0031] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0032] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. An automatic detection device for limit stop cover, comprising a frame (1), characterized in that, A workbench (2) is provided on the frame (1). A fixed seat (3) is installed on the workbench (2). A fixed frame (4) and a placement seat (5) are installed on the fixed seat (3). The placement seat (5) is used to place the limiter cover, and the upper surface of the placement seat (5) can be tightly fitted with the lower surface of the limiter cover. A CCD detection device (6) is installed on the fixed frame (4). The CCD detection device (6) is located directly above the placement seat (5). The fixed seat (3) is... A photoelectric sensor (7) is installed, which corresponds to the placement seat (5) so that the photoelectric sensor (7) is located below the limiter cover, and the sensing part of the photoelectric sensor (7) corresponds to the lower surface of the limiter cover. The photoelectric sensor (7) is used to detect whether the limiter cover on the placement seat (5) is placed accurately. A counter (8) is installed on the frame (1), and the counter (8) is electrically connected to the CCD detection device (6).
2. The automatic detection of the limiter cover according to claim 1, characterized in that, The workbench (2) has an NG box (9) installed on its lower surface. The workbench (2) has a placement groove (10) on its surface, which is connected to the inside of the NG box (9).
3. The automatic detection of the limit stop cover according to claim 2, characterized in that, A photoelectric sensor 2 (11) is installed on the lower surface of the workbench (2), and the photoelectric sensor 2 (11) is located inside the NG box (9). The photoelectric sensor 2 (11) is used to detect the number of limiter covers entering the NG box (9) from the placement slot (10). The photoelectric sensor 2 (11) is electrically connected to the counter (8).
4. The automatic detection of the limit stop cover according to claim 1, characterized in that, The rack (1) is equipped with a computer host (12) and a display screen (13). The computer host (12) is electrically connected to the display screen (13) and the CCD detection device (6) so that the display screen (13) can display the detection data of the CCD detection device (6).
5. The automatic detection of the limit stop cover according to claim 4, characterized in that, Two double-hole button boxes (14) are installed on the frame (1). From left to right, they are a manual start button, a two-hand start button, a two-hand start button, and a buzzer. The two-hand start button is used to control the opening and closing state of the CCD detection device (6). The buzzer can sound an alarm when the CCD detection device (6) detects a defect.
6. The automatic detection of the limit stop cover according to claim 5, characterized in that, The CCD detection device (6) is slidably mounted on the fixed frame (4).
7. The automatic detection of the limit stop cover according to claim 2, characterized in that, The NG box (9) has an openable door (15) installed on one side.