A vehicle detection device and a suspension system

Abstract

This application discloses a carrier detection device and a suspension system, relating to the field of suspended conveyor technology. The carrier detection device utilizes the elastic force provided by a spring in the trigger assembly to allow a rotating arm to tilt and extend or embed into the side wall of the connecting rail. When the carrier abuts against the outer side of the rotating arm along the running direction, it pushes the arm to rotate around the hinge end and embed into the side wall of the connecting rail. At this time, the rotating arm enters the range of the slotted photoelectric detection, triggering a signal. After the carrier passes, the spring immediately drives the rotating arm to return to its initial state. Each carrier independently pushes the rotating arm to complete the entire detection process, ensuring that each carrier corresponds to one detection signal, significantly reducing counting errors and meeting the requirements of the suspended conveyor line for accurate carrier quantity counting. The trigger assembly can adapt to carriers of different sizes and surface conditions, avoiding detection omissions due to differences in carrier specifications. The through-hole design for the slotted photoelectric detection and trigger assembly also reduces the overall space occupied by the carrier detection device.

Description

Technical Field

[0001] This application relates to the field of suspended conveyor technology, and in particular to a vehicle detection device and a suspension system. Background Technology

[0002] In the actual operation of the suspended conveyor line, it is often necessary to count the number of vehicles passing through specific positions on the track, or to check whether the track is at full capacity, in order to ensure the orderly operation and efficient management of the conveyor line.

[0003] To achieve the above functions, a photoelectric sensor is usually installed on one side of the track. When the clothes hanger enters the detection range of the photoelectric sensor, a signal is triggered to perform quantity statistics or status detection. Alternatively, a specialized detection device can be used for detection, such as the "A Track Full Station Control Device" disclosed in 201720436463.1, which includes a pressure rod, a base, and rotating arms. The pressure rod and the base respectively form the upper and lower sides of a parallelogram structure, and two rotating arms form the other two sides of the parallelogram structure. The rotating arms are equipped with protruding sensing heads, and a spring is also installed between the rotating arms and the base. By pressing down on the pressure rod by the clothes hanger, the sensing head cooperates with the micro switch or sensor to achieve the detection function.

[0004] However, if multiple hangers are close together or spaced small, multiple hangers may enter the detection range of the photoelectric sensor at the same time, or multiple hangers may press down on the pressure bar at the same time, resulting in multiple hangers triggering a detection signal only once, leading to low counting accuracy. Utility Model Content

[0005] Therefore, it is necessary to provide a vehicle detection device to address the above problems, which uses a clothes hanger to abut against a rotating arm to rotate the arm, thereby triggering a slotted photoelectric sensor to perform counting. This application also provides a hanging system.

[0006] This application provides a vehicle detection device, including a connecting rail, wherein the connecting rail has a through hole for mounting a slotted photoelectric device and a triggering component;

[0007] The triggering component includes a fixed base, a rotating arm, and a spring; one end of the rotating arm is rotatably mounted on the fixed base, and the spring is disposed between the rotating arm and the fixed base so that the rotating arm can tilt out or embed into the side wall of the connecting rail. When the rotating arm is embedded into the side wall, the slotted photoelectric recording signal is generated.

[0008] Optionally, a first buckle is provided on the inner surface of the through hole, a first groove is formed on the upper surface of the through hole, and a second groove is formed on the lower surface of the through hole; the fixing base includes:

[0009] The substrate is connected to the connecting rail via the first buckle;

[0010] A limiting plate is disposed above the substrate and embedded in the first groove;

[0011] A limiting rib is disposed below the substrate and embedded in the second groove.

[0012] Optionally, the number of the first buckles is at least two, at least one of the first buckles is provided on the upper surface of the through hole, at least one of the first buckles is provided on the lower surface of the through hole, and the substrate is connected to the connecting rail through the first buckles on both sides.

[0013] Optionally, the width of the limiting plate is greater than the width of the substrate;

[0014] The lower surface of the limiting plate is provided with a hinge post, and the hinge end of the rotating arm is rotatably sleeved on the hinge post.

[0015] Optionally, a first spring limiting post is provided on the surface of the substrate facing the rotating arm, and a second spring limiting post is provided on the surface of the rotating arm facing the substrate, with the two ends of the spring respectively fitted onto the first spring limiting post and the second spring limiting post.

[0016] Optionally, a third groove is formed on the lower surface of the through hole, a second buckle is provided on the groove wall of the third groove, and a fourth groove is formed on the upper surface of the through hole; the slotted photoelectric device includes:

[0017] The base is embedded in the second groove and connected to the connecting rail via the second buckle;

[0018] A concave sensing head is connected to the base and embedded in the fourth groove, with the concave opening of the sensing head corresponding to the through hole.

[0019] Optionally, at least two second buckles are spaced apart on the groove wall of the third groove, and the base is connected to the connecting rail through at least two second buckles.

[0020] Optionally, a fifth groove is formed on the upper surface of the through hole, and a protrusion facing the upper surface of the through hole is provided on the inner side of the rotating arm, the protrusion being embedded in the fifth groove.

[0021] Optionally, the rotating arm is provided with an extension portion, and the side wall is provided with a limiting groove that matches the extension portion. The extension portion can extend out at an angle or be embedded in the limiting groove.

[0022] Accordingly, this application also provides a suspension system including the aforementioned vehicle detection device.

[0023] Compared with the prior art, the technical solution provided in this application has the following advantages:

[0024] The aforementioned vehicle detection device utilizes the elastic force provided by a spring in the trigger assembly to allow the rotating arm to tilt and extend or embed into the side wall of the connecting rail. When the vehicle abuts against the outer side of the rotating arm along the running direction, it pushes the rotating arm to rotate around the hinge end and embed into the side wall of the connecting rail. At this point, the rotating arm enters the detection range of the slotted photoelectric sensor, triggering a signal. After the vehicle passes, the spring immediately drives the rotating arm back to its initial state, i.e., tilted out of the side wall. In this way, each vehicle independently pushes the rotating arm to complete the entire detection process, ensuring that each vehicle corresponds to one detection signal, significantly reducing counting errors and meeting the requirements of the suspended conveyor line for accurate vehicle quantity counting. Furthermore, the trigger assembly can adapt to vehicles of different sizes and surface conditions, avoiding detection omissions due to differences in vehicle specifications. In addition, the through-hole design for the slotted photoelectric sensor and trigger assembly also reduces the overall space occupied by the vehicle detection device.

[0025] The suspension system provided in this application has all the technical features and beneficial effects of the aforementioned vehicle detection device, which will not be repeated here. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the vehicle detection device provided in the embodiments of this application;

[0027] Figure 2 This is a schematic diagram of the exploded structure of the vehicle detection device provided in the embodiments of this application;

[0028] Figure 3 This is a side view of the vehicle detection device provided in the embodiments of this application;

[0029] Figure 4 A schematic diagram of the side structure of the connecting rail in the vehicle detection device provided in the embodiments of this application;

[0030] Figure 5 This is a schematic diagram illustrating the cooperation between the slotted photoelectric and trigger components in the vehicle detection device provided in the embodiments of this application;

[0031] Figure 6 This is a schematic diagram showing the cooperation of the slotted photoelectric and trigger components in the vehicle detection device provided in the embodiments of this application from another angle;

[0032] Figure 7 This is a schematic diagram illustrating the use of the vehicle detection device provided in the embodiments of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Connecting rail; 1.1. Through hole; 1.2. First groove; 1.3. Second groove; 1.4. First buckle; 1.5. Third groove; 1.6. Second buckle; 1.7. Fourth groove; 1.8. Fifth groove; 1.9. Limiting groove;

[0035] 2. Slotted photoelectric sensor; 2.1. Base; 2.2. Concave sensing head;

[0036] 3. Fixing base; 3.1. Base plate; 3.2. Limiting plate; 3.3. Limiting rib; 3.4. First spring limiting post; 3.5. Hinge post;

[0037] 4. Rotary arm; 4.1. Outer side; 4.2. Protrusion; 4.3. Extension; 4.4. Second spring limiting post;

[0038] 5. Spring. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0040] See Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the vehicle detection device provided in the embodiments of this application; Figure 2 This is a schematic diagram of the exploded structure of the vehicle detection device provided in the embodiments of this application.

[0041] This application provides a vehicle detection device, including a connecting rail 1. The connecting rail 1 has a through hole 1.1 for mounting a slotted photoelectric sensor 2 and a trigger assembly. The trigger assembly includes a fixed base 3, a rotating arm 4, and a spring 5. One end of the rotating arm 4 is rotatably mounted on the fixed base 3. The spring 5 is disposed between the rotating arm 4 and the fixed base 3 so that the rotating arm 4 can tilt out or embed into the side wall of the connecting rail 1. When the rotating arm 4 is embedded in the side wall, the slotted photoelectric sensor 2 records a signal.

[0042] Specifically, to achieve the above functions, the structure is configured such that, for example, along the running direction of the carrier, the hinged end of the rotating arm 4 is located upstream, and the free end of the rotating arm 4 is located downstream. Thus, when the carrier presses the rotating arm 4 along its outer surface 4.1 from the hinged end to the free end, the inner side of the rotating arm 4 approaches the slotted photoelectric sensor 2 and enters its detection range, causing the slotted photoelectric sensor 2 to generate a detection signal.

[0043] It should be noted that in this embodiment, the ability of the rotating arm 4 to extend obliquely out of the side wall of the connecting rail 1 means that the outer surface 4.1 of the rotating arm 4 forms an angle with the length direction of the connecting rail 1.

[0044] Therefore, please refer to the following: Figure 7 , Figure 7 This is a schematic diagram of the vehicle detection device provided in this application embodiment. The vehicle detection device provided in this application embodiment uses the elastic force provided by the spring 5 in the trigger assembly to allow the rotating arm 4 to tilt and extend or embed into the side wall of the connecting rail 1. When the vehicle abuts against the outer surface 4.1 of the rotating arm 4 along the running direction, it can push the rotating arm 4 to rotate around the hinge end and embed into the side wall of the connecting rail 1. At this time, the rotating arm 4 enters the detection range of the slotted photoelectric sensor 2 and triggers a signal. After the vehicle passes, the spring 5 immediately drives the rotating arm 4 to return to its initial state, i.e., tilted out of the side wall. In this way, each vehicle independently pushes the rotating arm 4 to complete the entire detection process described above, ensuring that each vehicle corresponds to one detection signal, significantly reducing counting errors and meeting the requirements of the suspended conveyor line for accurate vehicle quantity counting. Furthermore, the trigger assembly can adapt to vehicles of different sizes and surface conditions, avoiding detection omissions due to differences in vehicle specifications. In addition, the slotted photoelectric sensor 2 and the trigger assembly are installed through the through hole 1.1, which also reduces the overall space occupied by the vehicle detection device.

[0045] Please refer to it again. Figure 2 Please refer to the following: Figure 3 and Figure 4 , Figure 3 This is a side view of the vehicle detection device provided in the embodiments of this application; Figure 4 This is a side view of the connecting rail in the vehicle detection device provided in this application embodiment. In some embodiments, a first buckle 1.4 is provided on the inner surface of the through hole 1.1, a first groove 1.2 is formed on the upper surface of the through hole 1.1, and a second groove 1.3 is formed on the lower surface of the through hole 1.1; the fixing base 3 includes: a base plate 3.1, which is connected to the connecting rail 1 through the first buckle 1.4; a limiting plate 3.2, which is disposed above the base plate 3.1 and embedded in the first groove 1.2; and a limiting rib 3.3, which is disposed below the base plate 3.1 and embedded in the second groove 1.3.

[0046] Specifically, in this embodiment, by embedding the limiting plate 3.2 in the first groove 1.2 and the limiting rib 3.3 in the second groove 1.3, the left and right movement of the fixing seat 3 within the through hole 1.1 is directly restricted, preventing the fixing seat 3 from floating or sinking due to frequent impacts of the carrier on the rotating arm 4. Simultaneously, the first buckle 1.4 locks the base plate 3.1 to the connecting rail 1, restricting the left and right sliding of the fixing seat 3. Combined with the first groove 1.2 and the second groove 1.3, the back and forth movement of the fixing seat 3 within the through hole 1.1 is further prevented, ensuring that the relative position of the trigger component and the slotted photoelectric sensor 2 remains precise. Thus, a quick connection between the base plate 3.1 and the connecting rail 1 is achieved without the need for screws, nuts, or other accessories, reducing the number of parts and assembly steps, and improving installation efficiency.

[0047] Please refer to it again. Figure 4 In some embodiments, the number of first buckles 1.4 is at least two, at least one first buckle 1.4 is provided on the upper surface of the through hole 1.1, at least one first buckle 1.4 is provided on the lower surface of the through hole 1.1, and the substrate 3.1 is connected to the connecting rail 1 through the first buckles 1.4 on both sides.

[0048] Specifically, at least one first buckle 1.4 is provided on the upper and lower surfaces of the through hole 1.1 to fix the substrate 3.1 on both sides, so as to prevent the substrate 3.1 from tilting to one side due to the force of the buckle on one side, and to ensure that the fixing seat 3 always remains in a horizontal state, thereby ensuring the accurate relative position of the rotating arm 4 and the slotted photoelectric 2 in the trigger component, without affecting the detection accuracy.

[0049] Please refer to the following: Figure 5 and Figure 6 , Figure 5 This is a schematic diagram illustrating the cooperation between the slotted photoelectric and trigger components in the vehicle detection device provided in the embodiments of this application; Figure 6 This is a schematic diagram showing the engagement of the slotted photoelectric and trigger components in the vehicle detection device provided in this application embodiment from another angle. In some embodiments, the width of the limiting plate 3.2 is greater than the width of the base plate 3.1; the lower surface of the limiting plate 3.2 is provided with a hinge post 3.5, and the hinge end of the rotating arm 4 is rotatably sleeved on the hinge post 3.5.

[0050] Specifically, the limiting plate 3.2 is wider than the base plate 3.1, resulting in a larger fitting area with the first groove 1.2 of the through hole 1.1. This allows it to be more tightly secured within the first groove 1.2, preventing the limiting plate 3.2 from coming out of or wobbling. Secondly, the hinge post 3.5 is integrated into the lower surface of the limiting plate 3.2, eliminating the need for additional mounting holes or reserved space on the base plate 3.1. This makes the structure of the base plate 3.1 simpler and provides more mounting positions for other components, improving the overall structural compactness.

[0051] Thus, the limiting plate 3.2 is embedded in the first groove 1.2, and its position is fixed and stable. The hinge column 3.5 maintains precise positioning with the limiting plate 3.2. When the rotating arm 4 is sleeved on the hinge column 3.5 and rotates, it is not easy to deviate or shake, ensuring that the trigger stroke and reset trajectory of the rotating arm 4 are consistent, and ensuring the accuracy of the detection signal.

[0052] Please refer to it again. Figure 6 In some embodiments, a first spring 5 limiting post 3.4 is provided on the surface of the substrate 3.1 facing the rotating arm 4, and a second spring 5 limiting post 4.4 is provided on the surface of the rotating arm 4 facing the substrate 3.1. The two ends of the spring 5 are respectively fitted onto the first spring 5 limiting post 3.4 and the second spring 5 limiting post 4.4.

[0053] Specifically, the first spring 5 limiting post 3.4 and the second spring 5 limiting post 4.4 serve as fixed fulcrums at both ends of the spring 5, directly restricting the radial movement and axial offset of the spring 5. This prevents the spring 5 from deviating from its preset position due to uneven force during repeated rotation of the rotating arm 4, thus preventing the spring 5 from getting stuck between the rotating arm 4 and the base plate 3.1, ensuring that the rotating arm 4 can smoothly reset without affecting the detection response speed. At the same time, it avoids lateral force caused by the tilting of the spring 5, preventing the rotating arm 4 from jamming, shaking, or having insufficient reset force during rotation, ensuring that the trajectory of the rotating arm 4 is consistent each time it is triggered and reset, and improving the accuracy and consistency of the detection signal.

[0054] Please refer to it again. Figure 2 and Figure 4 In some embodiments, a third groove 1.5 is provided on the lower surface of the through hole 1.1, and a second buckle 1.6 is provided on the groove wall of the third groove 1.5. A fourth groove 1.7 is provided on the upper surface of the through hole 1.1. The groove-shaped photoelectric device 2 includes: a base 2.1, which is embedded in the second groove 1.3 and connected to the connecting rail 1 through the second buckle 1.6; and a concave sensing head 2.2, which is connected to the base 2.1 and embedded in the fourth groove 1.7. The concave opening of the concave sensing head 2.2 corresponds to the through hole 1.1.

[0055] Specifically, the base 2.1 is embedded in the third groove 1.5 on the lower surface, and the concave sensing head 2.2 is embedded in the fourth groove 1.7 on the upper surface. These positions the bottom and top of the slotted photoelectric sensor 2, respectively, to ensure that the concave opening of the concave sensing head 2.2 is completely aligned with the through hole 1.1. This prevents the rotating arm 4 from failing to enter the concave area due to sensor head misalignment, or from blocking the sensing light path. It ensures that each movement of the rotating arm 4 can be accurately detected, eliminating missed detections or false detections.

[0056] Secondly, the base 2.1 is not only embedded in the third groove 1.5, but also locked to the connecting rail 1 by the second buckle 1.6. Even under high-frequency vibration or long-term use, it can effectively prevent the base 2.1 from loosening and the sensing head from shifting, avoid the optical path deviation of the slotted photoelectric 2, and ensure the long-term stability of detection accuracy.

[0057] Furthermore, during assembly, the third groove 1.5 and the fourth groove 1.7 can be directly used as mounting guide grooves. Simply insert the base 2.1 into the third groove 1.5 and the sensor head into the fourth groove 1.7, then snap the second clip 1.6 to complete the fixation. No additional measurement or adjustment is required, significantly reducing assembly time. During maintenance, simply release the second clip 1.6 to remove the base 2.1 and sensor head from the grooves. There is no need to disassemble the connecting rail 1 or other components, reducing downtime for maintenance and simplifying operation.

[0058] Please refer to it again. Figure 2 and Figure 4 In some embodiments, at least two second latches 1.6 are provided at intervals on the groove wall of the third groove 1.5, and the base 2.1 is connected to the connecting rail 1 through at least two second latches 1.6.

[0059] Specifically, at least two second latches 1.6 are spaced apart on the groove wall of the third groove 1.5. This evenly distributes the fixing force on the base 2.1 to multiple second latches 1.6, preventing any single second latch 1.6 from bearing excessive stress. This significantly reduces the risk of fatigue fracture caused by long-term concentrated stress on the second latch 1.6, extends its service life, and reduces the frequency of maintenance and replacement. Secondly, the spaced second latches 1.6 can constrain the base 2.1 from different directions. Laterally, they restrict the left-right sliding of the base 2.1, and longitudinally, they restrict the back-and-forth movement of the base 2.1. This prevents the base 2.1 from shifting due to equipment vibration or external impact, ensuring that the opening of the concave sensor head 2.2 is always precisely aligned with the through hole 1.1, without affecting the accuracy of optical path detection, and eliminating missed or false detections.

[0060] Please refer to it again. Figure 2 and Figure 4 In some embodiments, a fifth groove 1.8 is formed on the upper surface of the through hole 1.1, and a protrusion 4.2 facing the upper surface of the through hole 1.1 is provided on the inner side of the rotating arm 4, and the protrusion 4.2 is embedded in the fifth groove 1.8.

[0061] Specifically, by embedding the protrusion 4.2 into the fifth groove 1.8, the maximum rotation angle of the rotating arm 4 can be controlled, preventing the rotating arm 4 from rotating excessively due to external force, thereby limiting the maximum distance of the free end of the rotating arm 4 from the substrate 3.1. This prevents the spring 5 from being stretched beyond its range, causing permanent deformation, and also prevents the hinge end of the rotating arm 4 from breaking due to excessive force, thus extending the service life of the spring 5 and the rotating arm 4.

[0062] Please refer to it again. Figure 1 and Figure 2 In some embodiments, the rotating arm 4 is provided with an extension 4.3, and a limiting groove 1.9 matching the extension 4.3 is provided on the side wall. The extension 4.3 can extend out at an angle or be embedded in the limiting groove 1.9.

[0063] Specifically, the limiting groove 1.9 is used to limit the maximum rotation amplitude of the rotating arm 4. In this embodiment, the matching of the limiting groove 1.9 with the extension 4.3 directly prevents the rotating arm 4 from excessively rotating towards the substrate 3.1, avoiding hard collisions between the rotating arm 4 and components such as the sensor head, substrate 3.1, spring 5, or latches during rotation, thus protecting core components such as the sensor head, rotating arm 4, and spring 5 from impact damage. Simultaneously, it prevents excessive rotation of the rotating arm 4 from causing the spring 5 to be compressed beyond its range, avoiding permanent deformation or breakage of the spring 5, extending its service life, and reducing subsequent maintenance costs.

[0064] In summary, the vehicle detection device provided in this application embodiment utilizes the elastic force provided by the spring 5 in the trigger assembly to allow the rotating arm 4 to tilt out or embed into the side wall of the connecting rail 1. When the vehicle abuts against the outer surface 4.1 of the rotating arm 4 along the running direction, it can push the rotating arm 4 to rotate around the hinge end and embed into the side wall of the connecting rail 1. At this time, the rotating arm 4 enters the detection range of the slotted photoelectric sensor 2 and triggers a signal. After the vehicle passes, the spring 5 immediately drives the rotating arm 4 to return to its initial state, i.e., tilted out of the side wall. In this way, each vehicle independently pushes the rotating arm 4 to complete the entire detection process described above, ensuring that each vehicle corresponds to one detection signal, significantly reducing counting errors and meeting the requirements of the suspended conveyor line for accurate counting of vehicle numbers. Furthermore, the trigger assembly can adapt to vehicles of different sizes and surface conditions, avoiding detection omissions caused by differences in vehicle specifications. In addition, the slotted photoelectric sensor 2 and the trigger assembly are installed through the through hole 1.1, which also reduces the overall space occupied by the vehicle detection device.

[0065] Accordingly, this application also provides a suspension system including the aforementioned vehicle detection device. The suspension system provided by this application possesses all the technical features and beneficial effects of the aforementioned vehicle detection device, which will not be repeated here.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A vehicle detection device, characterized in that, Includes a connecting rail (1), which has a through hole (1.1) for setting a slotted photoelectric sensor (2) and a trigger assembly; The triggering component includes a fixed base (3), a rotating arm (4), and a spring (5); one end of the rotating arm (4) is rotatably mounted on the fixed base (3), and the spring (5) is disposed between the rotating arm (4) and the fixed base (3) so that the rotating arm (4) can tilt out or embed into the side wall of the connecting rail (1). When the rotating arm (4) is embedded in the side wall, the slotted photoelectric sensor (2) records the signal.

2. The vehicle detection device according to claim 1, characterized in that, The inner surface of the through hole (1.1) is provided with a first buckle (1.4), the upper surface of the through hole (1.1) is provided with a first groove (1.2), and the lower surface of the through hole (1.1) is provided with a second groove (1.3); the fixing base (3) includes: The substrate (3.1) is connected to the connecting rail (1) via the first buckle (1.4); A limiting plate (3.2) is disposed above the substrate (3.1) and embedded in the first groove (1.2); A limiting rib (3.3) is disposed below the substrate (3.1) and embedded in the second groove (1.3).

3. The vehicle detection device according to claim 2, characterized in that, The number of the first buckle (1.4) is at least two. At least one first buckle (1.4) is provided on the upper surface of the through hole (1.1) and at least one first buckle (1.4) is provided on the lower surface of the through hole (1.1). The substrate (3.1) is connected to the connecting rail (1) through the first buckles (1.4) on both sides.

4. The vehicle detection device according to claim 2, characterized in that, The width of the limiting plate (3.2) is greater than the width of the base plate (3.1); The lower surface of the limiting plate (3.2) is provided with a hinge post (3.5), and the hinge end of the rotating arm (4) is rotatably sleeved on the hinge post (3.5).

5. The vehicle detection device according to claim 2, characterized in that, A first spring limiting post (3.4) is provided on the surface of the substrate (3.1) facing the rotating arm (4), and a second spring limiting post (4.4) is provided on the surface of the rotating arm (4) facing the substrate (3.1). The two ends of the spring (5) are respectively fitted onto the first spring limiting post (3.4) and the second spring limiting post (4.4).

6. The vehicle detection device according to claim 2, characterized in that, The lower surface of the through hole (1.1) is provided with a third groove (1.5), and a second buckle (1.6) is provided on the groove wall of the third groove (1.5). The upper surface of the through hole (1.1) is provided with a fourth groove (1.7); the groove-shaped photoelectric device (2) includes: The base (2.1) is embedded in the second groove (1.3) and connected to the connecting rail (1) via the second buckle (1.6); A concave sensing head (2.2) is connected to the base (2.1) and embedded in the fourth groove (1.7). The concave opening of the concave sensing head (2.2) corresponds to the through hole (1.1).

7. The vehicle detection device according to claim 6, characterized in that, At least two second buckles (1.6) are spaced apart on the groove wall of the third groove (1.5), and the base (2.1) is connected to the connecting rail (1) through at least two second buckles (1.6).

8. The vehicle detection device according to claim 1, characterized in that, A fifth groove (1.8) is formed on the upper surface of the through hole (1.1), and a protrusion (4.2) facing the upper surface of the through hole (1.1) is provided on the inner side of the rotating arm (4), and the protrusion (4.2) is embedded in the fifth groove (1.8).

9. The vehicle detection device according to claim 1, characterized in that, The rotating arm (4) is provided with an extension (4.3), and the side wall is provided with a limiting groove (1.9) that matches the extension (4.3). The extension (4.3) can extend out at an angle or be embedded in the limiting groove (1.9).

10. A suspension system, characterized in that, Includes the vehicle detection device as described in any one of claims 1 to 9.

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