Electrophoresis ash calipers with high weather resistance

Abstract

The utility model discloses a pair of electrophoresis ash calipers with high weather resistance, which comprises a high weather resistance telescopic rack used for being connected with an automobile brake, a first clamping plate and a second clamping plate which are arranged at two ends of the telescopic rack and controlled by the telescopic rack to perform clamping action, and further comprises a rough measurement assembly, the rough measurement assembly is composed of a third infrared distance meter and a baffle, and the third infrared distance meter and the baffle are fixed to the first clamping plate and the second clamping plate respectively. According to the pair of electrophoresis ash calipers with the high weather resistance, the high weather resistance telescopic rack is connected to an automobile brake, the length of the telescopic rack is adjusted according to the size of a brake disc, the telescopic rack is controlled to enable a first clamping plate and a second clamping plate to clamp the brake disc, a third infrared distance meter and a baffle are opened, and the brake disc is clamped; the infrared distance meter is used for measuring the real-time distance between the first clamping plate and the second clamping plate, the sliding block makes rolling contact outside the brake disc, and the accurate thickness of the brake disc is obtained by measuring the displacement amount of the sliding block.

Description

Technical Field

[0001] The utility model belongs to the technical field of calipers, and in particular relates to an electrophoretic gray caliper with high weather resistance. Background Art

[0002] Electrophoresis calipers may refer to a caliper tool that has been treated with electrophoresis. Electrophoresis is an electrochemical process in which charged particles (such as metal ions) are moved under the influence of an electric field and deposited on electrodes to form a uniform coating. This coating can change the surface properties of an object, such as increasing corrosion resistance, wear resistance, or improving appearance.

[0003] In the field of hardware tools, electrophoresis treatment is often used to improve the appearance and performance of tools. For example, electrophoresis calipers may have better corrosion resistance and wear resistance, suitable for various industrial applications.

[0004] Brake discs will wear out during long-term use. If the thickness of the brake disc becomes lower, the braking performance of the brake disc will decrease, which may lead to safety accidents. Therefore, it is necessary to use a tooth to detect the thickness of the brake disc during vehicle maintenance. Due to the obstruction of the tire hub, when inspecting the brake disc without removing the hub, a multi-point size detection method is usually used for thickness detection, which is mostly used during vehicle maintenance.

[0005] However, there are disadvantages in using a multi-point size detection method for thickness detection. The overall thickness of the brake disc cannot be detected. When the brake disc is partially damaged due to an accident, it is easy to miss the inspection, which poses a safety hazard. Disassembling the wheel hub or even the brake disc for inspection is time-consuming and labor-intensive, and the user cannot predict the thickness of the brake disc well. There is a problem of excessive wear of the brake disc before the vehicle maintenance period. Therefore, we propose a highly weather-resistant electrophoretic gray caliper. Summary of the invention

[0006] The utility model aims to provide an electrophoretic gray caliper with high weather resistance to solve the technical problems raised in the background technology.

[0007] To achieve the above-mentioned objectives, the specific technical scheme of the utility model is as follows: a highly weather-resistant electrophoretic gray caliper, comprising a highly weather-resistant telescopic frame for connecting to a vehicle brake, a first clamping plate and a second clamping plate installed at both ends of the telescopic frame, the first clamping plate and the second clamping plate being controlled by the telescopic frame to perform a clamping action, and also comprising a coarse measurement component, the coarse measurement component being composed of a third infrared rangefinder and a baffle, the third infrared rangefinder and the baffle being respectively fixed on the first clamping plate and the second clamping plate, the second clamping plate being composed of a fine measurement component and a protective shell, the protective shell being fixed at the output end of the telescopic frame, the fine measurement component being fixedly installed inside the protective shell, the fine measurement component comprising a slider, the output end of the slider being elastically arranged, and the slider being used for rolling contact with the outside of the brake disc.

[0008] Preferably, the telescopic frame includes a casing and a bidirectional electric push rod, the bidirectional electric push rod is fixedly installed inside the casing, and the two ends of the bidirectional electric push rod are respectively fixedly connected to the first clamping plate and the second clamping plate, and the first clamping plate and the second clamping plate have the same structure and are symmetrically arranged.

[0009] Preferably, the precision measurement component also includes a driving member, a telescopic plate and a slide rail. The slider cooperates with the driving member, the telescopic plate and the slide rail. One side of the telescopic plate is rotatably connected to the output end of the driving member, and the other side of the telescopic plate is internally rotatably installed at the lower part of the slider. The slide rail is fixed on the upper part of the protective shell, and the slider is internally slidably installed.

[0010] Preferably, the driving member includes a turntable, a second slide plate, a first fixed plate and a third spring. The turntable is rotatably installed inside the protective shell, and the first fixed plate is fixedly installed inside the turntable. The second slide plate is slidably installed inside the first fixed plate via the third spring, and the second slide plate body is located outside the first fixed plate.

[0011] Preferably, the telescopic plate consists of a second fixed plate and a third slide plate, the second fixed plate is rotatably mounted on the lower part of the slider, and the third slide plate is slidably mounted inside one side of the second fixed plate, and the side of the third slide plate away from the slider is rotatably connected to the second slide plate.

[0012] Preferably, the driving member also includes a driving wheel, a first bevel gear, a second bevel gear, a second spring and an L-shaped support rod, the second bevel gear is slidably inserted and installed on the upper part of the turntable through the second spring, the L-shaped support rod is rotatably installed on the upper part of the second bevel gear, the L-shaped support rod is rotatably connected to the first bevel gear on the outside of a side away from the second bevel gear, the first bevel gear is meshed with the second bevel gear, and one side of the first bevel gear is fixedly connected to the driving wheel, and the driving wheel is slidably installed inside the protective shell.

[0013] Preferably, the telescopic frame also includes a first spring, a first slide plate, a first roller, and a first infrared rangefinder. The first slide plate is slidably installed on one side of the casing through the first spring, the first roller is rotatably installed inside the side of the first slide plate away from the first spring, the first infrared rangefinder is fixedly installed inside the casing, and a support frame is installed outside the casing. The support frame is rotatably limited and installed with a connecting arm through bolts, the bolts are screwed to the support frame, and the output end of the bolt is pressed and contacted with the connecting arm, and the connecting arm is provided with a screw hole corresponding to the mounting hole position of the automobile brake.

[0014] The utility model has the following advantages:

[0015] The electrophoretic gray caliper with high weather resistance connects a high weather resistance telescopic frame to a car brake, and adjusts the length of the telescopic frame according to the size of the brake disc, controls the telescopic frame so that a first clamping plate and a second clamping plate clamp the brake disc, opens a third infrared rangefinder and a baffle, uses the infrared rangefinder to measure the real-time distance between the first clamping plate and the second clamping plate, and obtains a rough thickness of the brake disc. Based on the rough measurement, a slider rolls and contacts outside the brake disc, and obtains the precise thickness of the brake disc by measuring the displacement of the slider. The measured brake disc thickness data is transmitted to a main control system of the car, and the system analyzes and processes according to a set reference value or standard to determine whether the brake disc needs to be replaced or repaired. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure provided by the utility model;

[0018] Figure 2 This is a schematic diagram of the telescopic frame structure provided by the utility model

[0019] Figure 3 It is a structural schematic diagram of the precision measurement component provided by the utility model;

[0020] Figure 4 The utility model provides Figure 3 Schematic diagram of the structure at A in the middle;

[0021] Figure 5 This is a schematic diagram of the structure of the second bevel gear provided by the utility model;

[0022] Figure 6 It is a schematic diagram of the telescopic plate structure provided by the utility model;

[0023] Figure 7 It is a schematic diagram of the telescopic plate structure provided by another embodiment of the utility model;

[0024] Figure 8 This is a schematic diagram of the telescopic plate structure provided by another embodiment of the utility model;

[0025] Fig. 9 It is a schematic diagram of the cross-sectional structure of the telescopic plate provided by the utility model;

[0026] Fig.10 The utility model is a schematic diagram of the cross-sectional structure of the telescopic frame.

[0027] In the figure: 100, telescopic frame; 200, first clamping plate; 300, second clamping plate; 400, rough measurement component; 500, support frame; 600, bolt; 700, connecting arm; 800, screw hole; 110, housing; 120, two-way electric push rod; 130, first spring; 140, first slide plate; 150, first roller; 160, first infrared rangefinder; 310, fine measurement component; 320, protective shell; 311, driving member; 3 12. telescopic plate; 313. slide rail; 314. slider; 3111. driving wheel; 3112. first bevel gear; 3113. second bevel gear; 3114. turntable; 3115. second slide plate; 3116. second spring; 3117. L-shaped support rod; 3118. first fixed plate; 3119. third spring; 3121. second fixed plate; 3122. third slide plate; 410. third infrared rangefinder; 420. baffle. DETAILED DESCRIPTION

[0028] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0029] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0032] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0033] In order to better understand the purpose, structure and function of the utility model, the utility model is further described in detail below with reference to the accompanying drawings.

[0034] like Figure 1-10 As shown, the utility model is a highly weather-resistant electrophoretic gray caliper, comprising a highly weather-resistant telescopic frame 100 for connecting to a vehicle brake, a first clamping plate 200 and a second clamping plate 300 installed at both ends of the telescopic frame 100, the first clamping plate 200 and the second clamping plate 300 are controlled by the telescopic frame 100 to perform a clamping action, and also comprises a coarse measurement component 400, the coarse measurement component 400 is composed of a third infrared rangefinder 410 and a baffle 420, the third infrared rangefinder 410 and the baffle 420 are respectively fixed on the first clamping plate 200 and the second clamping plate 300, the second clamping plate 300 is composed of a fine measurement component 310 and a protective shell 320, the protective shell 320 is fixed at the output end of the telescopic frame 100, the fine measurement component 310 is fixedly installed inside the protective shell 320, the fine measurement component 310 comprises a slider 314, the output end of the slider 314 is elastically arranged, and the slider 314 is used for rolling contact with the outside of the brake disc.

[0035] The above-mentioned highly weather-resistant electrophoretic gray caliper connects the highly weather-resistant telescopic frame 100 to the automobile brake, and adjusts the length of the telescopic frame 100 according to the size of the brake disc. By controlling the telescopic frame 100, the first clamping plate 200 and the second clamping plate 300 clamp the brake disc, and the third infrared rangefinder 410 and the baffle 420 are opened. The infrared rangefinder is used to measure the real-time distance between the first clamping plate 200 and the second clamping plate 300 to obtain the rough thickness of the brake disc. On the basis of the rough measurement, the slider 314 rolls and contacts the outside of the brake disc, and the precise thickness of the brake disc is obtained by measuring the displacement of the slider 314. The measured brake disc thickness data is transmitted to the automobile main control system, and the system analyzes and processes according to the set reference value or standard to determine whether the brake disc needs to be replaced or repaired.

[0036] Preferably, the telescopic frame 100 includes a housing 110 and a bidirectional electric push rod 120, the bidirectional electric push rod 120 is fixedly installed inside the housing 110, and the two ends of the bidirectional electric push rod 120 are respectively fixedly connected to the first clamping plate 200 and the second clamping plate 300, and the first clamping plate 200 and the second clamping plate 300 have the same structure and are symmetrically arranged.

[0037] The core component of the telescopic frame 100 is a sturdy and durable housing 110, in which a two-way electric push rod 120 is cleverly installed. This electric push rod is not only stable and reliable, but also its two ends are closely connected to the first clamping plate 200 and the second clamping plate 300 respectively, ensuring the uniform transmission of force and the precise execution of the action. The first clamping plate 200 and the second clamping plate 300 are exactly the same in structure and are symmetrically arranged. This symmetrical design not only improves the overall aesthetics, but also ensures that the two clamping plates can be evenly stressed during use, the clamping is more stable, and the deviation or damage caused by uneven force is effectively prevented. When the brake disc needs to be tested, the two-way electric push rod 120 will quickly and accurately extend and retract under the precise command of the control system, driving the first clamping plate 200 and the second clamping plate 300 to move closer to the brake disc until the brake disc is firmly clamped. This process not only reflects the efficiency of the equipment, but also highlights its excellent stability and reliability.

[0038] The precision measuring assembly 310 also includes a driving member 311, a telescopic plate 312 and a slide rail 313. The slide block 314 cooperates with the driving member 311, the telescopic plate 312 and the slide rail 313. One side of the telescopic plate 312 is rotatably connected to the output end of the driving member 311. The other side of the telescopic plate 312 is internally rotatably mounted at the lower part of the slide block 314. The slide rail 313 is fixed to the upper part of the protective shell 320, and the slide block 314 is slidably mounted inside. The driving member 311 includes a rotating disk 3114, a second slide plate 3115, a first fixed plate 3118 and a third spring 3119. The rotating disk 3114 is rotatably mounted inside the protective shell 320, and the first fixed plate 3118 is fixedly mounted inside the rotating disk 3114. The second slide plate 3115 is slidably mounted inside the first fixed plate 3118 through the third spring 3119. The main body of the second slide plate 3115 is located outside the first fixed plate 3118. The telescopic plate 312 is composed of a second fixed plate 3121 and a third slide plate 3122. The second fixed plate 3121 is rotatably installed at the lower part of the slider 314, and the third slide plate 3122 is slidably installed inside one side of the second fixed plate 3121. The side of the third slide plate 3122 away from the slider 314 is rotatably connected to the second slide plate 3115. The driving member 311 also includes a driving wheel 3111, a first bevel gear 3112, a second bevel gear 3113, a second spring 3116 and an L-shaped support rod 3117. The second bevel gear 3113 is slidably inserted and installed on the upper part of the turntable 3114 through the second spring 3116. The L-shaped support rod 3117 is rotatably installed on the upper part of the second bevel gear 3113. The L-shaped support rod 3117 is rotatably connected to the first bevel gear 3112 on the outside of the side away from the second bevel gear 3113. The first bevel gear 3112 is meshed with the second bevel gear 3113, and one side of the first bevel gear 3112 is fixedly connected to the driving wheel 3111, and the driving wheel 3111 is slidably installed inside the protective shell 320.

[0039] When the thickness of the brake disc needs to be measured, the driving member 311 starts to work. The driving wheel 3111 slides inside the protective shell 320, and drives the rotating disk 3114 to rotate through the meshing transmission of the first bevel gear 3112 and the second bevel gear 3113. The first fixed plate 3118 inside the rotating disk 3114 pushes the second sliding plate 3115 to move through the third spring 3119, thereby driving the telescopic plate 312 connected thereto to telescope.

[0040] One side of the telescopic plate 312 is rotatably connected to the output end of the driving member 311, and the other side is internally rotatably mounted at the bottom of the slider 314. When the telescopic plate 312 is extended or retracted, it drives the slider 314 to slide on the slide rail 313 to achieve precise displacement control. At the same time, the sliding cooperation between the second fixed plate 3121 and the third slide plate 3122 enables the telescopic plate 312 to adjust its length according to actual needs to adapt to brake discs of different sizes.

[0041] During the measurement process, the slider 314 rolls and contacts the outside of the brake disc. By measuring the displacement of the slider 314, the thickness of the brake disc can be accurately calculated. This design not only improves the accuracy of the measurement, but also ensures the stability and reliability of the measurement. The precise design and working principle of the precision measurement component 310 provide a strong guarantee for the accurate measurement of the brake disc thickness and is an indispensable and important part of the brake disc testing equipment.

[0042] The telescopic frame 100 also includes a first spring 130, a first slide plate 140, a first roller 150, and a first infrared rangefinder 160. The first slide plate 140 is slidably installed on one side of the casing 110 through the first spring 130. The first roller 150 is rotatably installed inside the side of the first slide plate 140 away from the first spring 130. The first infrared rangefinder 160 is fixedly installed inside the casing 110. A support frame 500 is installed outside the casing 110. The support frame 500 is rotatably limited and installed with a connecting arm 700 through a bolt 600. The bolt 600 is screwed to the support frame 500, and the output end of the bolt 600 is pressed and contacted with the connecting arm 700. The connecting arm 700 is provided with a screw hole 800 corresponding to the mounting hole position of the automobile brake.

[0043] When the brake disc needs to be tested, it is first fixedly connected to the vehicle brake through the screw hole 800 on the connecting arm 700. At this time, the first slide plate 140 is subjected to the pressure of the brake disc and slides in the slide groove of the housing 110. At the same time, the first spring 130 generates corresponding elastic resistance to limit the first slide plate 140 to ensure that it slides stably within a certain range.

[0044] During the sliding process, the first roller 150 reduces the friction between the housing 110 and the first roller 150, making the sliding smoother. At the same time, the first infrared rangefinder 160 measures the position change of the first slide plate 140 in real time and transmits the data to the control system. The control system calculates the position change of the first slide plate 140 to accurately calculate the thickness of the brake disc and compares it with the preset standard value to determine whether the brake disc needs to be replaced or repaired.

[0045] The utility model overall selects high-strength, corrosion-resistant alloy materials such as stainless steel or nickel-based alloys to ensure that the caliper has excellent mechanical properties and durability. Before electrophoretic coating, the base material is strictly pretreated, including degreasing, rust removal, phosphating and other steps to ensure good adhesion between the coating and the base. By controlling parameters such as current density, coating time and temperature, the ideal coating thickness and performance can be obtained.

[0046] The working principle of the highly weather-resistant electrophoretic grey caliper:

[0047] The high weather-resistant telescopic frame 100 is connected to the automobile brake, and the length of the telescopic frame 100 is adjusted according to the size of the brake disc. The first clamping plate 200 and the second clamping plate 300 are clamped together by controlling the telescopic frame 100. The third infrared rangefinder 410 and the baffle 420 are turned on. The infrared rangefinder is used to measure the real-time distance between the first clamping plate 200 and the second clamping plate 300 to obtain the rough thickness of the brake disc. On the basis of the rough measurement, the slider 314 rolls and contacts the outside of the brake disc. The displacement of the slider 314 is measured to obtain the precise thickness of the brake disc. The measured brake disc thickness data is transmitted to the automobile main control system. The system analyzes and processes the data according to the set reference value or standard to determine whether the brake disc needs to be replaced or repaired.

[0048] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A highly weather-resistant electrophoretic gray caliper, comprising a highly weather-resistant telescopic frame (100) for connecting to a vehicle brake, a first clamping plate (200) and a second clamping plate (300) mounted at both ends of the telescopic frame (100), wherein the first clamping plate (200) and the second clamping plate (300) are controlled by the telescopic frame (100) to perform a clamping action, characterized in that: The invention also comprises a coarse measurement component (400), the coarse measurement component (400) comprising a third infrared rangefinder (410) and a baffle (420), the third infrared rangefinder (410) and the baffle (420) being fixed on the first clamping plate (200) and the second clamping plate (300) respectively, the second clamping plate (300) comprising a fine measurement component (310) and a protective shell (320), the protective shell (320) being fixed on the output end of the telescopic frame (100), the fine measurement component (310) being fixedly mounted inside the protective shell (320), the fine measurement component (310) comprising a slider (314), the output end of the slider (314) being elastically arranged, and the slider (314) being used for rolling contact with the outside of the brake disc.

2. The highly weather-resistant electrophoretic gray caliper according to claim 1, characterized in that: The telescopic frame (100) comprises a housing (110) and a bidirectional electric push rod (120), wherein the bidirectional electric push rod (120) is fixedly mounted inside the housing (110), and two ends of the bidirectional electric push rod (120) are respectively fixedly connected to the first clamping plate (200) and the second clamping plate (300), and the first clamping plate (200) and the second clamping plate (300) have the same structure and are symmetrically arranged.

3. The highly weather-resistant electrophoretic gray caliper according to claim 2, characterized in that: The precision measurement component (310) further comprises a driving member (311), a telescopic plate (312) and a slide rail (313); the slide block (314) cooperates with the driving member (311), the telescopic plate (312) and the slide rail (313); one side of the telescopic plate (312) is rotatably connected to the output end of the driving member (311); the other side of the telescopic plate (312) is internally rotatably mounted at the bottom of the slide block (314); the slide rail (313) is fixed to the top of the protective shell (320) and the slide block (314) is slidably mounted therein.

4. The highly weather-resistant electrophoretic grey caliper according to claim 3, characterized in that: The driving member (311) comprises a rotating disk (3114), a second sliding plate (3115), a first fixed plate (3118) and a third spring (3119); the rotating disk (3114) is rotatably mounted inside the protective shell (320), and the first fixed plate (3118) is fixedly mounted inside the rotating disk (3114); the second sliding plate (3115) is slidably mounted inside the first fixed plate (3118) via the third spring (3119); and the main body of the second sliding plate (3115) is located outside the first fixed plate (3118).

5. The highly weather-resistant electrophoretic gray caliper according to claim 4, characterized in that: The telescopic plate (312) is composed of a second fixed plate (3121) and a third slide plate (3122); the second fixed plate (3121) is rotatably mounted on the lower part of the sliding block (314); the third slide plate (3122) is slidably mounted inside one side of the second fixed plate (3121); and the side of the third slide plate (3122) away from the sliding block (314) is rotatably connected to the second slide plate (3115).

6. The highly weather-resistant electrophoretic grey caliper according to claim 5, characterized in that: The driving member (311) further comprises a driving wheel (3111), a first bevel gear (3112), a second bevel gear (3113), a second spring (3116) and an L-shaped support rod (3117); the second bevel gear (3113) is slidably plugged and mounted on the upper part of the rotating disk (3114) via the second spring (3116); the L-shaped support rod (3117) is rotatably mounted on the upper part of the second bevel gear (3113); a side of the L-shaped support rod (3117) away from the second bevel gear (3113) is externally rotatably connected to the first bevel gear (3112); the first bevel gear (3112) is meshedly connected to the second bevel gear (3113); one side of the first bevel gear (3112) is fixedly connected to the driving wheel (3111); and the driving wheel (3111) is slidably mounted inside the protective shell (320).

7. The highly weather-resistant electrophoretic gray caliper according to claim 2, characterized in that: The telescopic frame (100) further comprises a first spring (130), a first slide plate (140), a first roller (150), and a first infrared rangefinder (160); the first slide plate (140) is slidably mounted on one side of the housing (110) via the first spring (130); the first roller (150) is rotatably mounted inside a side of the first slide plate (140) away from the first spring (130); the first infrared rangefinder (160) is fixedly mounted inside the housing (110); a support frame (500) is mounted outside the housing (110); a connecting arm (700) is rotatably mounted on the support frame (500) via a bolt (600); the bolt (600) is screwed to the support frame (500), and an output end of the bolt (600) is pressed and contacted with the connecting arm (700); and a screw hole (800) corresponding to a mounting hole position of a vehicle brake is provided on the connecting arm (700).

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