Portable tire inner profile detection device and detection method

Abstract

The application discloses a portable tire inner contour detection device and a detection method. The portable tire inner contour detection device comprises a tool frame, a laser ranging mechanism and a data processing unit. The tool frame comprises two mounting parts and a body, the two mounting parts are respectively connected to two ends of the body, and the two mounting parts are configured to be detachably connected with the toe of the tire. The laser ranging mechanism is installed at a specified position and is used for measuring the size of the inner contour of the inner ring and generating detection size data; the data processing unit is connected with the laser ranging mechanism, and standard size data of a standard tire is pre-stored in the data processing unit, and the detection size data transmitted by the laser ranging mechanism is compared and analyzed with the standard size data. The technical scheme provided by the application can effectively measure the inner contour size of the engineering machinery tire, so that researchers can improve and analyze based on the basis, and solve the problems that the development of the engineering machinery tire is lagging behind and the quality of the engineering machinery tire cannot be improved.

Description

Technical Field

[0001] This application relates to the field of tire inspection technology, and more specifically, to a portable tire inner contour inspection device and inspection method. Background Technology

[0002] Construction machinery tires have been developing for nearly 100 years, but their performance and quality still lag behind the development of corresponding vehicle models. While domestic construction machinery tire manufacturers have also been developing for decades, their quality still lags significantly behind international giants. Detailed statistical analysis reveals that the biggest problem in performance and quality lies in the stability of tire manufacturing quality. Specifically, construction machinery tires exhibit significant dimensional fluctuations, meaning there are noticeable variations in the material's dimensional distribution. However, due to the unique manufacturing process of construction machinery tires, most of the molding compound is directly wound from rubber sheets. Therefore, the inner contour dimensions of construction machinery tires cannot be effectively inspected and measured, hindering researchers from guiding tire improvement and analysis. This results in the lag in the development of construction machinery tires and the inability to improve their quality. Summary of the Invention

[0003] This application provides a portable tire inner contour detection device and detection method, which can effectively measure the inner contour dimensions of engineering machinery tires, allowing researchers to make improvements and analyses based on evidence, and solving the problem of lagging development of engineering machinery tires and the inability to improve the quality of engineering machinery tires.

[0004] In a first aspect, the present invention provides a portable tire inner contour detection device, comprising: a tooling frame including two mounting parts and a main body, the two mounting parts being respectively connected to both ends of the main body, the two mounting parts being configured to be detachably connected to the tire toe, such that the main body is mounted on the inner ring of the tire, the main body forming a designated position; a laser ranging mechanism, mounted at the designated position, for measuring the dimensions of the inner contour of the inner ring and generating detection dimension data; and a data processing unit, connected to the laser ranging mechanism, pre-stored with standard dimension data of a standard tire, for comparing and analyzing the detection dimension data transmitted by the laser ranging mechanism with the standard dimension data.

[0005] In the above process, the tooling frame is directly mounted on the inner surface of the tire to be inspected via two mounting parts, so that the laser ranging mechanism faces the inner cavity of the tire. The laser ranging mechanism emits a laser into the inner cavity of the tire to measure the size of the inner contour of the inner circle and generate inspection dimension data. After receiving the inspection dimension data, the data processing unit compares and analyzes it with the pre-stored standard dimension data to obtain the difference between the inner contour of the tire being inspected and the standard tire, so as to determine whether the tire size meets the design standard. This data can then guide and improve fluctuations in the process, improve the dimensional stability of the tire, and guide the control of the production process. Alternatively, the tire being inspected can be a used tire, and the standard tire can be a tire before use. Researchers can use the differences between the tires before and after use for efficient, realistic, and effective technological research and development and innovation.

[0006] In an optional embodiment, the mounting portion has a first abutting portion that abuts against the outer side of the toe. The mounting portion also has a second abutting portion that abuts against the top surface of the toe. The mounting portion is engaged with the toe via the first and second abutting portions.

[0007] In the above process, the mounting part is snapped onto the tire toe, allowing the tooling frame to be connected to the tire to be inspected under any conditions, and it is easy to disassemble. At the same time, since the mounting part fits into the tire toe, only one operator is needed to set the tooling frame on the inner ring of the tire, which facilitates daily inspection and analysis of tires by a single operator.

[0008] In an optional embodiment, the mounting part is positioned adjustablely on the body along the extension direction of the body.

[0009] During the above process, the operator can adjust the position of the mounting part on the main body to accommodate tires of different sizes.

[0010] In an optional embodiment, the mounting part has a groove, and the main body passes through the groove; the mounting part is equipped with a locking screw, which is threaded into the mounting part and passes through the groove to abut against the main body.

[0011] In the above process, when it is necessary to adjust the position of the mounting part on the main body, loosen the locking screw so that the locking screw is disengaged from the main body. The operator can then move the mounting part so that it slides along the extension direction of the main body. When it slides to the desired position, tighten the locking screw so that the locking screw abuts against the main body, thereby fixing the mounting part to the main body.

[0012] In an optional implementation, dimension markings are provided on the body along the extension direction of the body.

[0013] During the above process, the operator can adjust the position of the two mounting parts on the main body based on the dimensional markings to accurately adjust the mounting parts to the required position.

[0014] In an optional implementation, the laser rangefinder is rotatably mounted at a designated location.

[0015] In the above process, the laser ranging mechanism rotates one by one at a set angle to measure the distance of the inner contour of the tire at different positions on the plane of the tooling frame, obtains multiple sets of detection dimension data, compares them with standard dimension data, and obtains a precise analysis structure.

[0016] In an optional embodiment, the main body is provided with a positioning groove, which is located at a designated position and has a threaded hole; the portable tire inner contour detection device also includes a rotating part and a base; the base includes a positioning block, which is embedded in the positioning groove, and the base is fixed to the main body by screwing a fixing screw into the threaded hole; the laser ranging mechanism is rotatably connected to the base through the rotating part.

[0017] In the above process, the laser ranging mechanism rotates on the base through the rotating part to measure the distance at different positions of the inner contour of the tire; the base is accurately installed in the designated position through the cooperation of the positioning block and the positioning groove to ensure that the laser ranging mechanism is in the designated position.

[0018] In an optional embodiment, the portable tire inner contour detection device further includes an angle recognition plate located between the base and the rotating part, used to determine the rotation angle of the laser rangefinder mechanism.

[0019] In the above process, the rotation angle of the laser ranging mechanism can be determined according to the angle recognition plate to ensure that the laser ranging mechanism has rotated into place.

[0020] Secondly, the present invention provides a method for detecting the inner contour of a tire. The method employs the portable tire inner contour detection device described in the aforementioned embodiment, and includes the following steps: an installation step, in which a fixture is installed on the inner ring of the tire; a measurement step, in which a laser ranging mechanism is activated to measure the inner contour dimensions of the tire and generate detection dimension data; and a comparison step, in which a data processing unit compares and analyzes the detection dimension data transmitted by the laser ranging mechanism with standard dimension data. In an optional embodiment, the laser ranging mechanism is rotatably installed at a designated position; in the measurement step, the laser ranging mechanism is activated and rotated to measure the dimensions at different positions of the inner contour of the tire and generate multiple sets of detection dimension data.

[0021] In an optional implementation, the method further includes the following steps: an adjustment step, adjusting the position of the tooling relative to the tire based on the tire's central axis, a measurement step, and a comparison step, to obtain multiple sets of comparative analysis results. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the operation of the portable tire inner contour detection device in this embodiment;

[0024] Figure 2 This is the front view of the tooling frame in this embodiment;

[0025] Figure 3 This is a top view of the tooling frame in this embodiment;

[0026] Figure 4 for Figure 1 Enlarged view of section IV;

[0027] Figure 5 This is a front view of the laser ranging mechanism, rotating part, and base in this embodiment;

[0028] Figure 6 This is a side view of the laser ranging mechanism, rotating part, and base in this embodiment;

[0029] Figure 7 This is a schematic diagram of a portable tire inner contour detection device and an outer inspection platform.

[0030] Icons: 10-Tooling frame; 11-Mounting part; 12-Body; 110-First abutment part; 111-Second abutment part; 112-Locking screw; 120-Designated position; 121-Dimension marking; 122-Positioning groove; 123-Threaded hole; 20-Laser rangefinder mechanism; 21-Rotating part; 22-Base; 23-Angle recognition plate; 220-Positioning block; 30-Data processing unit; 40-Display; 50-External inspection platform. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of the embodiments of this application, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", 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 placed when the product of this application is used, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or component 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 application.

[0035] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0037] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0038] This embodiment provides a portable tire inner contour detection device, which can effectively measure the inner contour dimensions of engineering machinery tires, allowing researchers to make improvements and analyses based on evidence, and solving the problem of lagging development of engineering machinery tires and the inability to improve the quality of engineering machinery tires.

[0039] Please see Figures 1-3 , Figure 1 This is a schematic diagram of the operation of the portable tire inner contour detection device in this embodiment. Figure 2 This is the front view of the tooling frame 10 in this embodiment. Figure 3 This is a top view of the tooling fixture 10 in this embodiment. Figure 1 In the diagram, arrow A points to the tire, and arrow B points to the inner contour of the tire.

[0040] The portable tire inner contour detection device includes a tooling frame 10, a laser ranging mechanism 20, and a data processing unit 30.

[0041] The tooling frame 10 includes two mounting portions 11 and a body 12. The two mounting portions 11 are respectively connected to both ends of the body 12. The two mounting portions 11 are configured to be detachably connected to the tire toe, so that the body 12 is mounted on the inner ring of the tire. The body 12 has a designated position 120. The designated position 120 is located between the two mounting portions 11. In this embodiment, the designated position 120 is located at the center of the body 12.

[0042] The laser ranging mechanism 20 is installed at the designated position 120. When the two mounting parts 11 are connected to the tire toe, that is, when the tooling frame 10 is set on the inner ring of the tire, the laser ranging mechanism 20 can measure the size of the inner contour of the inner ring and generate detection size data.

[0043] The data processing unit 30 is connected to the laser ranging mechanism 20 and pre-stores standard tire size data. This data is used to compare and analyze the measured size data transmitted by the laser ranging mechanism 20 with the standard size data. The data processing unit 30 can be connected to a display 40, and the standard size data, measured size data, and the results of their comparison analysis stored in the data processing unit 30 can be displayed on the display 40 for researchers to reference and analyze.

[0044] In the above-described process, the tooling frame 10 is directly mounted on the inner surface of the tire to be inspected via two mounting parts 11, so that the laser ranging mechanism 20 faces the inner cavity of the tire. The laser ranging mechanism 20 emits a laser into the inner cavity of the tire to measure the size of the inner contour of the inner ring and generate inspection size data. After receiving the inspection size data, the data processing unit 30 compares and analyzes it with the pre-stored standard size data to obtain the difference between the inner contour of the tire being inspected and the standard tire, so as to determine whether the tire size meets the design standard, and thereby guide and improve the fluctuations in the process, improve the dimensional stability of the tire and guide the control of the production process; or, the tire being inspected is a used tire and the standard tire is a tire before use. Researchers can conduct analysis and research based on the differences between the tires before and after use, which can be used efficiently, realistically and effectively for technology research and development and technological innovation.

[0045] Please combine Figure 4 , Figure 4 for Figure 1 Enlarged view of section IV.

[0046] The mounting portion 11 has a first abutting portion 110 that abuts against the outer side of the toe. The mounting portion 11 also has a second abutting portion 111 that abuts against the top surface of the toe. The mounting portion 11 is engaged with the toe via the first abutting portion 110 and the second abutting portion 111.

[0047] In the above process, the mounting part 11 is snapped onto the tire toe, so that the tooling frame 10 can be connected to the tire to be inspected under any conditions and is easy to disassemble; at the same time, since the mounting part 11 fits into the tire toe, only one operator is needed to set the tooling frame 10 on the inner ring of the tire, which is convenient for a single operator to perform daily inspection and analysis of the tire.

[0048] Please refer to the previous page. Figure 2 and Figure 3 The mounting part 11 is adjustablely positioned on the body 12 along its extension direction. During the above implementation, the operator can adjust the position of the mounting part 11 on the body 12 to accommodate tires of different sizes.

[0049] The mounting part 11 has a groove, and the main body 12 passes through the groove. The mounting part 11 is equipped with a locking screw 112, which is threaded into the mounting part 11 and passes through the groove to abut against the main body 12.

[0050] Two screw holes are formed at intervals on the surface of the mounting part 11. Two locking screws 112 are screwed into their respective screw holes. By tightening the locking screws 112, the mounting part 11 and the body 12 are fixed.

[0051] When it is necessary to adjust the position of the mounting part 11 on the body 12, loosen the locking screw 112 so that the locking screw 112 is disengaged from the body 12. The operator can move the mounting part 11 so that the mounting part 11 slides along the extension direction of the body 12. When it slides to the desired position, tighten the locking screw 112 so that the locking screw 112 abuts against the body 12, thereby fixing the mounting part 11 to the body 12.

[0052] Please see Figure 2 The body 12 has a dimension mark 121 along the extension direction of the body 12.

[0053] The operator can adjust the position of the two mounting parts 11 on the body 12 based on the dimension marking 121 to accurately adjust the mounting parts 11 to the required position.

[0054] Optionally, the laser ranging mechanism 20 is rotatably mounted at a designated position 120. The laser ranging mechanism 20 rotates sequentially at a set angle to measure the distance dimensions of the inner contour of the tire at different positions on the plane of the tooling frame 10, obtaining multiple sets of measured dimensional data, which are then compared with standard dimensional data to obtain a precise analytical structure.

[0055] Please combine Figure 2 , Figure 3 , Figure 5 as well as Figure 6 , Figure 5 This is a front view of the laser ranging mechanism 20, the rotating part 21, and the base 22 in this embodiment. Figure 6 This is a side view of the laser ranging mechanism 20, the rotating part 21, and the base 22 in this embodiment.

[0056] The main body 12 is provided with a positioning groove 122, which is located at a designated position 120. The positioning groove 122 is provided with a threaded hole 123. The positioning groove 122 is located on the side of the main body 12. The portable tire inner contour detection device also includes a rotating part 21 and a base 22. The base 22 includes a positioning block 220, which is embedded in the positioning groove 122. The base 22 is fixed to the main body 12 by screwing a fixing screw into the threaded hole 123. The laser ranging mechanism 20 is rotatably connected to the base 22 via the rotating part 21. In the above process, the laser ranging mechanism 20 rotates on the base 22 via the rotating part 21 to measure the distance at different positions of the inner contour of the tire; the base 22 is accurately installed at the designated position 120 through the cooperation of the positioning block 220 and the positioning groove 122 to ensure that the laser ranging mechanism 20 is in the designated position 120. It should be noted that the rotating part 21 can be a rotating shaft, and the operator can manually rotate the laser ranging mechanism 20. The rotating part 21 may also include an electric rotating mechanism, such as a servo motor. When the rotating part 21 includes an electric rotating mechanism, the electric rotating mechanism is connected to the data processing unit 30. The data processing unit 30 can control the electric rotating mechanism to control the rotation of the laser ranging mechanism 20 and the rotation angle of the laser ranging mechanism 20.

[0057] Optionally, the portable tire inner contour detection device further includes an angle recognition plate 23, which is located between the base 22 and the rotating part 21, and is used to determine the rotation angle of the laser ranging mechanism 20. The rotation angle of the laser ranging mechanism 20 can be determined according to the angle recognition plate 23 to confirm whether the laser ranging mechanism 20 has rotated into position.

[0058] It should be noted that the length of the main body 12 is less than 1000mm, the width is 5-10mm, and the height is 10-15mm. The main body 12 and the mounting part 11 are made of high-strength alloy material, and the weight is controlled within 5kg. According to the size, it meets the purpose of being able to be quickly and easily operated by one person (requiring one person to be able to quickly disassemble and use it).

[0059] It should be noted that this application embodiment also provides a tire inner contour detection method. The detection method uses the portable tire inner contour detection device described in the aforementioned embodiment, and the method includes the following steps: an installation step, in which the tooling frame 10 is installed on the inner ring of the tire; a measurement step, in which the laser ranging mechanism 20 is activated to measure the inner contour dimensions of the tire and generate detection dimension data; and a comparison step, in which the data processing unit 30 compares and analyzes the detection dimension data transmitted by the laser ranging mechanism 20 with standard dimension data.

[0060] Optionally, the laser ranging mechanism 20 is rotatably mounted at a designated position 120. During the measurement step, the laser ranging mechanism 20 is activated and rotated to measure the dimensions at different positions of the inner contour of the tire and generate multiple sets of measurement dimension data.

[0061] Optionally, the detection method also includes an adjustment step, which involves adjusting the position of the tooling 10 relative to the tire based on the tire's central axis, performing measurement and comparison steps, and obtaining multiple sets of comparative analysis results.

[0062] It should be noted that, to ensure the tires are not affected by deformation due to their own weight, the construction machinery tires are placed on a specially designed external inspection platform 50, or placed upright, or suspended in the air using overhead crane technology. The portable tire inner contour inspection device is positioned in a location where the tire will not be disturbed. Figure 7 , Figure 7 This is a schematic diagram of a portable tire inner contour detection device and an outer inspection platform 50. The tire is placed upright on the outer inspection platform 50, and the measuring position of the portable tire inner contour detection device is approximately 40 degrees to the inner circumference of the tire. Figure 7 In the diagram, the arrow labeled C points to the location of the portable tire inner contour detection device. The device is shown at 41 degrees to the inner edge of the tire (in actual operation, the tire should be kept undisturbed). Multiple measurements can be taken at various positions by rotating the tire using a dedicated external inspection platform 50, allowing for adjustment. Other methods also involve rotating the tire to obtain measurement data from multiple positions, and can also be used to confirm the dimensions of marked positions for technical analysis parameters.

[0063] A specific detection method is described below:

[0064] The first preparation step is to prepare a portable tire inner contour detection device, that is, to prepare a tooling frame 10 of the same specifications as the tire to be detected, so that the tooling frame 10 can be installed on the inner ring of the tire, and to calibrate the designated position 120 of the laser rangefinder 20 to be installed.

[0065] Step two involves preparing the laser ranging mechanism 20 and the data processing unit 30, which stores standard dimensional data. The laser ranging mechanism 20 uses a single laser point for distance measurement. This laser point can rotate at a designed angle, and the distance to the corresponding position is measured based on the rotation angle. After acquiring the measurement data, the laser ranging mechanism 20 compares it with the standard dimensional data according to relevant rules and makes corresponding technical judgments. The judgment results and measurement results are displayed on the monitor 40. The measured data is exported for analysis by technical personnel.

[0066] In the third preparation step, the measurement position is determined. In this step, the tooling frame 10 and the laser rangefinder 20 are installed on the part of the tire that is not subject to any external force. The tire is installed on the inspection platform, and the portable tire inner contour detection device is manually installed on the tire.

[0067] Inspection steps: Install the laser ranging mechanism 20 at the designated position 120 of the fixture 10, adjust the positions of the two mounting parts 11, and install the fixture 10 on the inner ring of the tire; start and rotate the laser ranging mechanism 20 to measure the dimensions of different positions of the inner contour of the tire and generate multiple sets of inspection dimension data. The rotation angles of the laser ranging mechanism 20 include 0 degrees, 15 degrees, 30 degrees, 45 degrees, 60 degrees, 75 degrees, 90 degrees, 105 degrees, 120 degrees, 135 degrees, 150 degrees, 165 degrees, and 180 degrees. The inspection dimension data includes upper limit data, lower limit data, and measured values; the data processing unit 30 compares and analyzes the inspection dimension data transmitted by the laser ranging mechanism 20 with the standard dimension data, and displays the results of the comparison and analysis on the display 40.

[0068] The analysis results are shown in the table below:

[0069]

[0070] It should be noted that different measurement frequencies can be used to evaluate the quality stability of tires with different requirements.

[0071] The portable tire inner contour detection device and method described above offer significant guidance for technological research and development and production processes: Based on the measured data, R&D personnel can link this data to laboratory testing and actual market performance for unified analysis. This data can be used to conduct related analyses and serve as an effective technical tool to guide tire design. Data analysis can also guide process improvements and the establishment of technical standards in the production process, as well as improvements in human, machine, material, environmental, and methodological factors. R&D or process personnel can use this detection device to measure the inner contour dimensions of tires of different brands and specifications, as well as to measure data before and after tire use. This serves as an important method for collecting and analyzing technical parameters for R&D and process improvement.

[0072] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A portable tire inner profile detection device characterized by, The application relates to a portable tire inner contour detection device. The device comprises a tool frame, a laser ranging mechanism and a data processing unit. The tool frame comprises two mounting parts and a body, the two mounting parts are respectively connected to two ends of the body, and the two mounting parts are configured to be detachably connected with the toe of a tire so that the body is arranged on the inner ring of the tire, and the body is formed with a specified position. The laser ranging mechanism is rotatably arranged on the specified position about a direction tangent to the circumferential direction of the tire, and the laser ranging mechanism is used to measure the distance size of different positions of the tire inner contour on the plane of the tool frame according to a set angle, and a plurality of groups of detection size data are obtained. The data processing unit is connected with the laser ranging mechanism, and standard size data of a standard tire are pre-stored in the data processing unit, and the detection size data transmitted by the laser ranging mechanism are compared and analyzed with the standard size data. The body is provided with a positioning groove, the positioning groove is located at the specified position, and the positioning groove is provided with a threaded hole. The portable tire inner contour detection device further comprises an angle identification plate, a rotating part and a base. The base comprises a positioning block, the positioning block is embedded in the positioning groove, the base is fixed to the body through a fixing screw matched with the threaded hole, the laser ranging mechanism is rotatably connected with the base through the rotating part, and the angle identification plate is located between the base and the rotating part and is used to determine the rotation angle of the laser ranging mechanism.

2. The portable tire inner contour detection device according to claim 1, wherein The mounting part is formed with a first abutting part abutting against the outer side surface of the toe. The mounting part is formed with a second abutting part abutting against the top surface of the toe. The mounting part is clamped on the toe through the first abutting part and the second abutting part.

3. The portable tire inner contour detection device according to claim 2, wherein The mounting part is adjustably arranged on the body in the extension direction of the body.

4. The portable tire inner contour detection device according to claim 3, wherein The mounting part is formed with a sliding groove, and the body passes through the sliding groove.

6. A method of detecting the inner profile of a tire, characterized by, The mounting part is provided with a locking screw, the locking screw is threadedly matched with the mounting part and abuts against the body through the sliding groove.

5. The portable tire inner contour detection device according to claim 3, wherein The body is provided with a size mark in the extension direction of the body. The detection method adopts the portable tire inner contour detection device according to claim 1, and the method comprises the following steps: A mounting step of mounting the tool frame on the inner ring of the tire; A measurement step of starting and rotating the laser ranging mechanism, the laser ranging mechanism is used to measure the distance size of different positions of the tire inner contour on the plane of the tool frame about the direction tangent to the circumferential direction of the tire according to a set angle, a plurality of groups of detection size data are obtained, and whether the laser ranging mechanism is rotated to the position is determined according to the angle identification plate; A comparison step of comparing and analyzing the detection size data transmitted by the laser ranging mechanism with the standard size data by the data processing unit.

7. The method of claim 6, wherein: the method further comprises the steps of: adjusting the position of the tool holder with respect to the tire based on the center axis of the tire, performing the measuring step and the comparing step to obtain a plurality of sets of comparison results.

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