Mounting structure of vehicle body height sensor

Abstract

The utility model provides a mounting structure of a vehicle body height sensor, and aims to solve the technical problems that the efficiency of assembling the conventional sensor on a vehicle is low, and the assembling vehicle type is limited. A sensing assembly is arranged in a base in a surrounding manner; the guide assembly is arranged on the outer wall of the base and connected between the top end of the base and the bottom end of the base. The guide assembly penetrates through the sliding block and is in threaded connection with the sliding block, and the sliding block moves in the extending direction of the guide assembly. One end of the telescopic unit is slidably connected to the sliding block. By adjusting the sliding distance of the telescopic unit in the extending direction of the sliding block, the telescopic distance of the telescopic unit and the moving distance of the sliding block in the extending direction of the guiding assembly, the other end of the telescopic unit is connected with the chassis support in a matched mode, alignment between holes is prevented from being achieved through repeated manual adjustment, and the assembling efficiency is improved; and moreover, the mounting structure can perform multi-dimensional auxiliary adjustment on the position of the mounting hole, so that the mounting structure can be applied and assembled in various vehicle types, and the application range is expanded.

Description

Technical Field

[0001] This application relates to the field of automotive body height sensor technology, and more particularly to an installation structure for a body height sensor. Background Technology

[0002] Vehicle height sensors are essential components in automobiles used to measure changes in the attitude of the front and rear suspensions. Their assembly typically requires aligning the sensor's connectors with the vehicle's connectors before bolting them together. Since height sensors often have multiple connectors to align, technicians must first estimate the approximate installation position based on experience. During the subsequent alignment and assembly process, fine-tuning the sensor's position is performed on each connector. This multiple alignment steps make the assembly process cumbersome and inefficient.

[0003] Furthermore, the connection port of the height sensor is usually located directly on the sensor itself. When it is directly assembled with the car, it is not only prone to significant vibration due to the mechanical movement of the vehicle body, which affects the detection results, but also the height sensor has a limited range of applications in automobiles due to the limited size of its connection port. Utility Model Content

[0004] To address the aforementioned problems, this application provides a mounting structure for a vehicle height sensor, comprising:

[0005] The base unit includes a base, a guide assembly, and a slider;

[0006] The base is used to enclose the sensing components therein;

[0007] The guide assembly is disposed on the outer wall of the base and connected between the top and bottom ends of the base;

[0008] The slider is threadedly connected through the guide assembly and is used for movement of the slider along the extension direction of the guide assembly;

[0009] The telescopic unit has one end slidably connected to the slider;

[0010] Specifically, by adjusting the sliding distance of the telescopic unit along the extension direction of the slider, the telescopic distance of the telescopic unit itself, and the moving distance of the slider along the extension direction of the guide assembly, the other end of the telescopic unit is matched and connected to the chassis bracket. At this time, one end of the telescopic unit is bolted to the slider.

[0011] Furthermore, a swing arm bracket is rotatably connected to one side wall of the sensing component; the swing arm bracket is exposed outside the base and is used for installation on the vehicle suspension.

[0012] Furthermore, the sensing component includes a height sensor and a mounting bracket;

[0013] The height sensor has a swing arm bracket rotatably connected to one side wall.

[0014] The mounting bracket is fitted and fixed to the outer wall near the bottom of the height sensor and connected to the base.

[0015] Furthermore, the base includes a bottom plate, a top plate, a side plate, and a mounting plate; the bottom plate, the top plate, and the side plate form a box structure with one open side for the entry and exit of the sensing component; the mounting plate is movably mounted on the base to match the open side of the base and is used to seal the open side of the base.

[0016] Furthermore, a buffer layer is installed between each inner wall of the base and the outer wall of its corresponding height sensor.

[0017] Furthermore, the guide assembly extends vertically along the outer wall of the side plate of the base; each guide assembly includes a guide rod and a rotating column;

[0018] Each guide rod is fixed at both ends to the top plate and the bottom plate, respectively;

[0019] Each rotating column has one end rotatably connected to the top plate and the other end passing through and rotatably connected to the bottom plate; two guide rods are arranged between two rotating columns.

[0020] Furthermore, the guide assembly also includes a transmission component, which includes a drive wheel, a conveyor belt, and a driven wheel; the conveyor belt is sleeved on the outer wall of the drive wheel and the driven wheel; the drive wheel and the driven wheel are matched with a rotating column and connected to the exposed end of the rotating column after it passes through the base plate.

[0021] Furthermore, the telescopic unit includes a telescopic rod, a mounting post, and a limiting component; one end of the telescopic rod is slidably connected to the slider, and the other end is connected to the mounting post, which is used for installation with the chassis bracket; the limiting component is installed on the telescopic rod and is used to limit the degree of extension and retraction of the telescopic rod.

[0022] Furthermore, the telescopic unit includes a telescopic rod, a mounting post, and a limiting assembly;

[0023] The telescopic rod includes a first rod and a second rod;

[0024] The first rod has one end that slides along the extension direction of the slider; a positioning hole is provided on the top surface of the first rod near its other end.

[0025] The second rod has the first rod slidably connected to its outer wall; multiple moving slots matching the positioning holes are arranged in an array at the top of the second rod along its axial direction and toward the base.

[0026] The mounting post is connected to the second rod; the mounting post has a mounting hole extending through it along its axial direction;

[0027] The limiting component is mounted on one side of the top surface of the first rod near its other end, and its other side is matched and passes through the positioning hole into the moving groove to limit the sliding of the second rod.

[0028] Furthermore, the limiting assembly includes a mounting base, a support rod, a rotating plate, and a spring.

[0029] The mounting base is positioned on the top surface of the first rod near its other end, with the first rod's axial direction as the axis of symmetry.

[0030] The support rod is rotatably connected between the two mounting bases;

[0031] The rotating plate has a first side located between two mounting bases and penetrated by the support rod; the second side of the rotating plate extends toward the positioning hole, and the rotating plate has a limiting post at its bottom end near the second side that matches the positioning hole and the moving groove.

[0032] The spring element has one end mounted on the bottom end of the rotating plate near its first side via a fixed base, and the other end mounted on the top surface of the first rod via a fixed base.

[0033] When the spring is in its natural state, the first side of the rotating plate is higher than the second side, causing the rotating plate to be obliquely positioned at the top of the first rod. At the same time, the limiting post passes through the positioning hole into the moving groove. When the first side of the rotating plate is pressed down, causing the second side to be raised, the limiting post can be driven out of the positioning hole.

[0034] Compared with the prior art, the beneficial effects of this utility model are:

[0035] (1) By installing the base with the sensing components on it to the vehicle base bracket through the telescopic unit, and installing a buffer layer between the base and the height sensor, it is beneficial to alleviate the vibration of the height sensor caused by the movement of the vehicle body, thereby reducing the impact of the sensor's own vibration on its detection accuracy.

[0036] (2) After the sensing component is installed on the car suspension via the swing arm bracket, the sliding distance of the slider along the extension direction of the guide rod, the sliding distance of the telescopic rod along the extension direction of the slider, and the extension degree of the telescopic rod itself are adjusted to help the mounting hole quickly align with the connection hole. This eliminates the need for repeated manual adjustments to the hole alignment, improving assembly efficiency. Moreover, the mounting structure of the vehicle height sensor can provide multi-dimensional auxiliary adjustments to the position of the mounting post, which is beneficial for its application in various vehicle models and expands its applicability. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the mounting structure of a vehicle height sensor according to an embodiment of this application;

[0039] Figure 2 A partially enlarged view A shows the limiting component of the mounting structure of a vehicle height sensor according to an embodiment of this application, assembled on the first rod;

[0040] Figure 3 This is a schematic diagram of the mounting column of a vehicle height sensor mounting structure according to an embodiment of this application, where the mounting column is assembled with the second rod.

[0041] Figure 4 This is a side view schematic diagram of the mounting structure of a vehicle height sensor according to an embodiment of this application (telescopic unit not shown);

[0042] Figure 5 This is a side view of the base of a vehicle height sensor mounting structure according to an embodiment of this application (mounting plate not shown).

[0043] Figure 6 This is a schematic diagram of the sensing component of an installation structure for a vehicle height sensor according to an embodiment of this application;

[0044] Figure 7 This is a side view of the mounting structure of a vehicle height sensor according to an embodiment of this application, showing the height sensor mounted on a base (mounting plate not shown).

[0045] Figure label:

[0046] 10. Height sensor; 11. Mounting bracket;

[0047] 20a, Top plate; 20b, Bottom plate; 20c, Side plate; 20d, Mounting plate; 201, Slide groove; 21, Buffer layer;

[0048] 3. Swing arm bracket;

[0049] 41. Guide rod; 42. Rotating column; 43. Slider; 430. Extension; 440. Driving wheel; 441. Driven wheel; 442. Conveyor belt; 45. Handle;

[0050] 51. First rod; 510. Positioning hole; 52. Second rod; 520. Moving groove; 53. Mounting post; 530. Mounting hole; 54. Mounting base; 55. Rotating piece; 56. Support rod; 57. Limiting post; 58. Spring component. Detailed Implementation

[0051] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0052] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between 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.

[0055] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0056] The following disclosure provides many different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0057] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0058] This utility model embodiment provides an installation structure for a vehicle height sensor. Please refer to [reference needed]. Figures 1-7 The mounting structure of the vehicle height sensor includes a sensing component, a base unit, and a telescopic unit.

[0059] Specifically,

[0060] The sensing assembly includes a height sensor 10 and a mounting bracket 11. The mounting bracket 11 is fitted and fixed to the outer wall near the bottom of the height sensor. One side wall of the height sensor 10 is rotatably connected to one end of a swing arm bracket, the other end of which is mounted to the vehicle suspension. Mechanical movement of the vehicle body causes rotation of one end of the swing arm bracket, which in turn generates a corresponding electrical signal and outputs it to the vehicle control system to provide feedback on the current height of the vehicle. Preferably, the height sensor is a Hall sensor; the mechanical movement of the vehicle body causing rotation of one end of the swing arm bracket can change the rotation angle of the magnetic field within the Hall sensor, which is then converted into an electrical signal and output to the vehicle control system.

[0061] The base unit includes a base, guide components, and a slider 43. The height sensor 10 is mounted on a first side of the base via a mounting bracket 11, and a guide component is provided on a second side of the base; the slider 42 is slidably connected between the two guide components along the extending direction of the guide components.

[0062] The base, consisting of a bottom plate 20b, a top plate 20a, and a side plate 20c forming a box structure with one open side, allows the sensing component to be housed within it. The swing arm bracket 3, rotatably connected to the height sensor 10, protrudes outward from the open side of the base. To facilitate the installation of the sensing component on the base, grooves 201 for matching mounting brackets 11 are provided on the left and right side plates of the base on its open side, allowing the mounting brackets 11 to slide against the inner wall of the base. The height sensor 10 is installed on the base by sliding the mounting brackets 11 into the base. The base also includes a mounting plate 20d, which is movably installed between the two side plates of the base. With the mounting plate 20d and the base in cooperation, the sensing component is fixed on the base. Preferably, a buffer layer 21 is installed between each inner wall of the base and the corresponding outer wall of the height sensor.

[0063] The guide assembly extends vertically along the outer wall of the side plate of the base. Each guide assembly includes a guide rod 41 and a rotating column 42; two guide rods 41 are arranged between two rotating columns 42. Both ends of each guide rod 41 are fixed to the top plate 20a and the bottom plate 20b, respectively. One end of each rotating column 42 is rotatably connected to the top plate 20a, and the other end passes through the bottom plate 20b and protrudes below it. One rotating column has a drive wheel 440 connected to its other end, and the other rotating column has a driven wheel 441 connected to its other end. A conveyor belt 442 is fitted over the outer walls of the drive wheel 440 and the driven wheel 441, so that the rotation of the drive wheel 440 drives the driven wheel 441 to rotate via the conveyor belt 442. A handle 45 is installed at the bottom end of the drive wheel 440.

[0064] The slider 43 has mounting slots that match the guide rods 41; that is, the number of mounting slots is the same as the number of guide rods, and the width of the mounting slots is equal to the width of the guide rods 41, allowing the slider 43 to slide along the extension direction of the guide rods and be slidably connected to the guide rods 41. The upward sliding distance of the slider 43 is limited by the top plate 20a. Extensions 430 are provided at both ends of the slider 43. The slider 43 is positioned between the top plate 20a and the bottom plate 20b, wherein the slider 43 is slidably connected to the guide rods 41 through which it passes, and the extensions 430 are threadedly connected to the rotating post 42 through which it passes.

[0065] When the handle 45 is turned clockwise or counterclockwise, the driving wheel 440 is driven to rotate, which in turn drives the driven wheel 441 to rotate via the conveyor belt 442. This causes the rotating column 42 to rotate synchronously, thereby driving the slider 43 to slide upward or downward along the extension direction of the guide rod.

[0066] The telescopic unit includes a telescopic rod, a limiting component, and a mounting post 53. One end of the telescopic rod is slidably connected to a slider 43, and the other end is connected to the mounting post 53. The limiting component is installed on the telescopic rod to limit the degree of extension and retraction of the telescopic rod. After the sensing component is mounted on the vehicle suspension via the swing arm bracket 3, the mounting post 53 is aligned with the vehicle chassis bracket for installation by adjusting the sliding distance of the slider 43 along the guide rod extension direction, the sliding distance of the telescopic rod along the slider extension direction, and the degree of extension and retraction of the telescopic rod itself.

[0067] The telescopic rod includes a first rod 51 and a second rod 52. One end of the first rod has a groove that matches the slider 43, allowing the first rod 51 to slide along the extension direction of the slider. When the first rod 51 slides to a suitable position, it is bolted to the slider 43. The other end of the first rod is sleeved and slidably connected to the outer wall of the second rod. The length of the telescopic rod can be adjusted by the reciprocating sliding of the second rod 52 along the axial direction of the first rod. A positioning hole 510 is formed on the top surface of the first rod 51 near its other end. Multiple moving slots 520 that match the positioning holes 510 are arranged in an array along the axial direction of the top of the second rod. That is, when the second rod 52 is pulled outward relative to the first rod 51, each moving slot 520 can sequentially align with the positioning hole 510.

[0068] A limiting assembly is mounted on one side of the top surface of the first rod 51 near its other end, and its other side passes through the positioning hole 510 into the moving groove 520 to limit the sliding of the second rod 52. The limiting assembly includes a mounting base 54, a support rod 56, a rotating plate 55, and a spring member 58.

[0069] Mounting base 54 is positioned on the top surface of the first rod near its other end, with the first rod axis as the axis of symmetry. Support rod 56 passes through the rotating plate 55 near the first side of the rotating plate, and its two ends are rotatably connected to the corresponding mounting base 54. The second side of the rotating plate extends towards the positioning hole 510. A limiting post 57 matching the positioning hole 510 and the moving groove 520 is provided at the bottom end of the rotating plate 55 near its second side, allowing the limiting post 57 to pass through the positioning hole 510 and into the moving groove 520 when the second rod 52 slides outward until the moving groove 520 aligns with the positioning hole 510. One end of the spring member 58 is mounted to the bottom end of the rotating plate 55 near its first side via a fixing base, and the other end is mounted to the top surface of the first rod via a fixing base, placing the support rod 56 between the limiting post 57 and the spring member 58. When the spring is in its natural state, the first side of the rotating plate is higher than the second side, so that the rotating plate 55 is obliquely positioned at the top of the first rod. At the same time, the limiting post 57 passes through the positioning hole 510 into the moving groove 520. When the first side of the rotating plate is pressed down, causing the second side to rise, the limiting post 57 can be driven out of the positioning hole 510.

[0070] Mounting post 53 is connected to the end of the second rod. Mounting post 53 has a mounting hole 530 extending through it along its axial direction. Mounting post 53 is installed to the vehicle chassis bracket via bolts connecting the mounting hole 530 and the connection hole at the chassis bracket.

[0071] Slide the first rod 51 along the extension direction of the slider so that the mounting hole 530 is close to the connecting hole along the extension direction of the slider. Then, by pressing the first side of the rotating plate, the limiting post 57 no longer restricts the extension and retraction of the telescopic rod. Adjust the sliding distance of the second rod 52 outward along the axis of the first rod until the mounting hole 530 and the connecting hole can be aligned.

[0072] Based on the above embodiments, the working principle of this application is as follows:

[0073] Slide the mounting bracket 11 into the base to install the height sensor 10 on the base, then install the mounting plate 20d onto the base to complete the installation of the sensing assembly within the base. Install the swing arm bracket 3, which is rotatably connected to one side of the height sensor, onto the vehicle suspension.

[0074] Slide the first rod 51 along the extension direction of the slider, causing the mounting hole 530 to move along the extension direction of the slider until the connecting hole is radially aligned with the first rod in the axial direction and the mounting hole 530 is radially aligned with the first rod in the axial direction. At this point, bolt the slider 43 to the first rod 51. Then, press the first side of the rotating plate to pull the second rod 52 outward, bringing the mounting hole closer to the connecting hole. When the mounting hole 530 and the connecting hole are axially aligned, stop pressing the rotating plate 55. At this point, the spring 58's elastic force returns, causing the limiting post 57 to pass through the positioning hole 510 into the moving groove 520. Finally, rotate the handle 45 to drive the drive wheel 440 to rotate. The driven wheel 441 rotates with the drive wheel 440 via the conveyor belt 442, causing the rotating post 42 to rotate synchronously, driving the slider 43 to slide along the extension direction of the guide rod, so that the mounting hole 530 finally connects with the connecting hole. The mounting hole 530 and the connecting hole are connected by bolts to realize the installation between the mounting post 53 and the chassis bracket.

[0075] Based on the above embodiments, the advantages of this application are:

[0076] (1) By installing the base with the sensing components on it to the vehicle base bracket through the telescopic unit, and installing a buffer layer 21 between the base and the height sensor 10, it is beneficial to alleviate the vibration of the height sensor as the vehicle moves, thereby reducing the impact of the sensor's own vibration on its detection accuracy.

[0077] (2) After the sensing component is installed on the vehicle suspension via the swing arm bracket 3, the sliding distance of the slider 43 along the extension direction of the guide rod, the sliding distance of the telescopic rod along the extension direction of the slider, and the extension degree of the telescopic rod itself are adjusted to help the mounting hole 530 quickly align with the connection hole. This eliminates the need for repeated manual adjustments to the hole alignment, improving assembly efficiency. Moreover, the above-mentioned vehicle height sensor mounting structure can provide multi-dimensional auxiliary adjustments to the position of the mounting post 53, which is beneficial for its application in various vehicle models and expands its applicability.

Claims

1. A mounting structure for a vehicle height sensor, used for mounting sensing components in a vehicle, characterized in that, It includes: The base unit includes a base, a guide assembly, and a slider; The base is used to enclose the sensing components therein; The guide assembly is disposed on the outer wall of the base and connected between the top and bottom ends of the base; The slider is threadedly connected through the guide assembly and is used for movement of the slider along the extension direction of the guide assembly; The telescopic unit has one end slidably connected to the slider; Specifically, by adjusting the sliding distance of the telescopic unit along the extension direction of the slider, the telescopic distance of the telescopic unit itself, and the moving distance of the slider along the extension direction of the guide assembly, the other end of the telescopic unit is matched and connected to the chassis bracket. At this time, one end of the telescopic unit is bolted to the slider.

2. The mounting structure for the vehicle height sensor according to claim 1, characterized in that: The sensing component is rotatably connected to a swing arm bracket on one side wall; the swing arm bracket is exposed outside the base and is used for installation on the vehicle suspension.

3. The mounting structure for the vehicle height sensor according to claim 2, characterized in that: The sensing components include a height sensor and a mounting bracket; The height sensor has a swing arm bracket rotatably connected to one side wall. The mounting bracket is fitted and fixed to the outer wall near the bottom of the height sensor and connected to the base.

4. The mounting structure for the vehicle height sensor according to claim 3, characterized in that: The base includes a bottom plate, a top plate, a side plate, and a mounting plate; the bottom plate, the top plate, and the side plate form a box structure with one open side for the entry and exit of the sensing component; the mounting plate is movably mounted on the base to match the open side of the base and is used to seal the open side of the base.

5. The mounting structure for the vehicle height sensor according to claim 3, characterized in that: A buffer layer is installed between each inner wall of the base and the outer wall of its corresponding height sensor.

6. The mounting structure for the vehicle height sensor according to claim 4, characterized in that: The guide assembly extends vertically along the outer wall of the side plate of the base; each guide assembly includes a guide rod and a rotating column. Each guide rod is fixed at both ends to the top plate and the bottom plate, respectively; Each rotating column has one end rotatably connected to the top plate and the other end passing through and rotatably connected to the bottom plate; two guide rods are arranged between two rotating columns.

7. The mounting structure for the vehicle height sensor according to claim 6, characterized in that: The guiding assembly also includes a transmission component, which includes a driving wheel, a conveyor belt, and a driven wheel; the conveyor belt is sleeved on the outer wall of the driving wheel and the driven wheel; the driving wheel and the driven wheel are respectively matched with the rotating column and connected to the exposed end of the rotating column after it passes through the base plate.

8. The mounting structure for the vehicle height sensor according to claim 1, characterized in that: The telescopic unit includes a telescopic rod, a mounting post, and a limiting component; one end of the telescopic rod is slidably connected to a slider, and the other end is connected to a mounting post, which is used for mounting to a chassis bracket; the limiting component is installed on the telescopic rod to limit the degree of telescopic extension.

9. The mounting structure for the vehicle height sensor according to claim 8, characterized in that: The telescopic rod includes a first rod and a second rod; The first rod has one end that slides along the extension direction of the slider; a positioning hole is provided on the top surface of the first rod near its other end. The second rod has the first rod slidably connected to its outer wall; multiple moving slots matching the positioning holes are arranged in an array at the top of the second rod along its axial direction and toward the base. The mounting post is connected to the second rod; the mounting post has a mounting hole extending through it along its axial direction; The limiting component is mounted on one side of the top surface of the first rod near its other end, and its other side is matched and passes through the positioning hole into the moving groove to limit the sliding of the second rod.

10. The mounting structure for the vehicle height sensor according to claim 9, characterized in that: The limiting assembly includes a mounting base, a support rod, a rotating plate, and a spring component; The mounting base is positioned on the top surface of the first rod near its other end, with the first rod's axial direction as the axis of symmetry. The support rod is rotatably connected between the two mounting bases; The rotating plate has a first side located between two mounting bases and penetrated by the support rod; the second side of the rotating plate extends toward the positioning hole, and the rotating plate has a limiting post at its bottom end near the second side that matches the positioning hole and the moving groove. The spring element has one end mounted on the bottom end of the rotating plate near its first side via a fixed base, and the other end mounted on the top surface of the first rod via a fixed base. When the spring is in its natural state, the first side of the rotating plate is higher than the second side, causing the rotating plate to be obliquely positioned at the top of the first rod. At the same time, the limiting post passes through the positioning hole into the moving groove. When the first side of the rotating plate is pressed down, causing the second side to be raised, the limiting post can be driven out of the positioning hole.

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