Automatic inspection device for profile tolerance of large component of vehicle body

Abstract

The invention relates to a vehicle body large component profile tolerance automatic inspection device, and belongs to the technical field of vehicle body large component profile detection. The technical problems to be solved are that the automation degree is low, the detection efficiency is low, the measurement result depends on manual visual reading, and the measurement data is inaccurate. According to the technical scheme, the upper portion of a detection sample plate is fixed to a sample plate fixing frame, and a plurality of measuring devices are slidably arranged on the sample plate fixing frame at intervals; the sliding positioning block is connected with the sample plate fixing frame and can transversely slide on the sample plate fixing frame; the distance measuring module is installed on the sliding connecting plate, the sliding connecting plate is connected with the sliding positioning block, the sliding positioning block transversely limits the sliding connecting plate, and the sliding connecting plate can longitudinally slide on the sliding positioning block; the distance measuring module can measure the distance between the outline of the to-be-measured vehicle body large component and the standard outline.

Description

Technical Field

[0001] This invention relates to the field of vehicle body large component contour detection technology, and in particular to an automatic inspection device for the contour of large vehicle body components. Background Technology

[0002] In the production of rail transit vehicles, ensuring that the vehicle's outer contour meets the standard requirements is fundamental to the safe passage of rail vehicles without encroaching on track clearance and maintaining a good appearance. However, welding deformation after welding is a common problem in rail vehicles. To ensure the outer contour of the car body, the first step is to inspect the contour after the components are welded. During the inspection process, precise and convenient inspection methods should be adopted to provide an accurate data basis for subsequent adjustment of car body components.

[0003] Currently, after the automatic welding of major vehicle body components is completed, the contour inspection templates used are mostly thin aluminum alloy plates. This requires manual measurement by bending over near the inspection area and visually reading the measurements with a steel ruler. The vehicle body components involve numerous measurements, and the human body is in an uncomfortable posture during measurement, resulting in high labor intensity. Furthermore, the width of major rail vehicle components exceeds 2 meters, making it difficult and inconvenient to measure deformation data in the central area. This can easily mislead measurement personnel, leading to incorrect readings, affecting measurement accuracy, increasing measurement errors, and ultimately impacting subsequent adjustments to the contour dimensions of the vehicle body components.

[0004] The commonly used aluminum alloy templates have low structural strength and cannot be held by a single person. When measuring some long and large parts with a large width, it usually requires two people to work together, one person visually measuring and counting, and the other person assisting in supporting the template, which is very inconvenient.

[0005] The existing measurement process involves two people holding the template while one person lies prone on the workpiece to take measurements. After visually reading the measurements, the data must be recorded on a paper measurement sheet before further data analysis can be performed to locate the out-of-tolerance areas of the vehicle body parts and make adjustments accordingly. This process is cumbersome, relies entirely on manual labor, and is inefficient and unstable.

[0006] Existing measurement techniques have the following drawbacks:

[0007] 1. The technical structure is simple, consisting of only an aluminum alloy template for laser cutting and a 150mm ruler. During the measurement process, the distance between the workpiece measurement point and the template outline needs to be manually measured using a steel ruler. The degree of automation is low, the detection efficiency is low, and the measurement results rely on manual visual reading, which is detrimental to the accuracy of the measurement data.

[0008] 2. When measuring long components of aluminum alloy car bodies, some locations are limited by structure and space, making manual measurement inconvenient. The measurement process requires the operator to lie on the workpiece and bend over to take the measurement readings, while another person assists by supporting the template.

[0009] 3. It requires a large number of personnel (at least two people are needed to work together, one of whom lies on the workpiece to measure the readings, and the other person assists in supporting the template), resulting in high labor and time costs.

[0010] 4. To ensure the strength and ease of manual handling of the template, additional support structures beyond the template outline are required during the design process, resulting in a larger template and the need to use more materials.

[0011] 5. When the existing template is tilted, manual measurement using a ruler will produce errors, affecting the judgment of the adjustment of the aluminum alloy vehicle body. Summary of the Invention

[0012] The purpose of this invention is to provide: An automatic inspection device for the contour of large vehicle body components, and related technologies, are disclosed to address technical problems such as low automation, low inspection efficiency, reliance on manual visual reading of measurement results, and inaccurate measurement data, or combinations thereof. This invention is easy to install, operate, and replace, and is adaptable to various vehicle models.

[0013] Terminology Explanation: Unless otherwise defined, all technical terms in this document have the same meanings as commonly understood by one of ordinary skill in the art to which the subject matter of the claims pertains. Unless otherwise stated, all patents, patent inventions, and publications cited in this document are incorporated herein by reference in their entirety. If multiple definitions exist for terms in this document, the definitions in this chapter shall prevail.

[0014] It should be understood that the above brief description and the following detailed description are exemplary and for illustrative purposes only, and do not limit the subject matter of the invention in any way. In this invention, the singular is used in conjunction with the plural unless otherwise specifically stated. It should also be noted that, unless otherwise stated, the use of “or” or “or” means “and / or”. Furthermore, the use of the term “comprising” and other forms such as “including,” “containing,” and “contains” are not limiting.

[0015] Unless otherwise stated, conventional methods within the scope of the art shall be used.

[0016] This invention provides: an automatic inspection device for the contour of large vehicle body components, including a test template, a template holder, and multiple measuring devices; The lower part of the test template is drawn according to the standard shape outline of the major components of the vehicle body. The upper part of the test sample is fixed on the sample fixing frame, and the plurality of measuring devices are slidably and spaced apart on the sample fixing frame; The measuring device includes a housing, a ranging module, a sliding connecting plate, a sliding positioning block, a first knob, and a second knob; the first knob and the second knob are disposed on the housing, the ranging module and the sliding connecting plate are disposed inside the housing, and the sliding positioning block is disposed outside the housing; The sliding positioning block is connected to the template fixing frame, and the sliding positioning block can slide laterally on the template fixing frame and is fixed by the second knob; The ranging module is mounted on the sliding connecting plate, the sliding connecting plate is connected to the sliding positioning block, the sliding positioning block limits the sliding connecting plate laterally, the sliding connecting plate can slide longitudinally on the sliding positioning block, and the sliding connecting plate is fixed by the first knob; The ranging module can measure the distance between the outline of the large component of the vehicle body under test and the standard outer shape outline from the bottom of the housing.

[0017] In the technical solution provided in the first aspect of the present invention, the preferred solution includes: In the first preferred embodiment, the outer surfaces of the test sample and the sample holder are flush, and both the test sample and the sample holder are provided with threaded holes for fastening connection by sample fixing bolts.

[0018] In the second preferred embodiment, the template fixing frame has a long sliding groove in the middle, and the measuring device is installed in conjunction with the long sliding groove; the end of the template fixing frame has a notch in the sliding groove for disassembling and assembling the measuring device.

[0019] In the third preferred embodiment, the measuring device is provided with a threaded hole, the test sample is provided with a long sliding groove, the measuring device can move on the test sample, and the measuring device and the test sample are fastened together by device fixing bolts.

[0020] In the fourth preferred embodiment, the outer shell includes a first shell and a second shell connected to each other. The first shell is provided with a first knob mounting port, and the first knob contacts the sliding connecting plate through the first knob mounting port. The second shell is provided with a second knob mounting port, and the template fixing frame is provided with an elongated groove. The second knob passes through the elongated groove of the template fixing frame through the second knob mounting port and is threadedly connected to the sliding positioning block.

[0021] In a further preferred embodiment, the first housing is further provided with a large cylinder and a small cylinder hole, the sliding positioning block is provided with a threaded countersunk hole that matches the large cylinder, and the second housing is provided with a threaded small cylinder that matches the small cylinder hole. The first housing and the second housing are fastened together by a housing fixing bolt, which passes through the small cylinder hole of the first housing and is fastened together with the threaded small cylinder on the second housing. The first housing and the sliding positioning block are fastened together by a sliding block fixing bolt, which passes through the large cylinder of the first housing and is fastened together with the countersunk hole of the sliding positioning block. The system also includes a digital tube electronic screen, the first housing is provided with a limiting structure, and the digital tube electronic screen is embedded in the limiting structure.

[0022] More preferably, the measuring device includes multiple infrared laser ranging modules, the sliding connecting plate is connected to the digital tube electronic screen, and the infrared laser ranging module is also connected to a PLC data acquisition system to analyze and calculate the distance between the outline of the large component of the vehicle body to be tested measured by the infrared laser ranging module and the standard outline. The measuring device also includes a gravity acceleration sensor, which locks the measurement data when it detects that the angle of the test template reaches a preset standard.

[0023] More preferably, the sliding connecting plate is provided with threaded holes, the infrared laser ranging module is fixed on the sliding connecting plate by module fixing bolts, and the second housing is fixed on the sliding connecting plate by module housing fixing bolts.

[0024] More preferably, the sliding positioning block has a groove in the middle to limit the sliding connecting plate laterally, and the sliding connecting plate can move longitudinally in the groove; the sliding positioning block has a round hole in the middle, and the sliding connecting plate has an elongated groove. The first knob passes through the elongated groove and is screwed into the threaded hole in the sliding positioning block to fix the sliding connecting plate. After the first knob is loosened, the sliding connecting plate can be adjusted longitudinally in the groove of the sliding positioning block, thereby adjusting the position of the infrared laser ranging module.

[0025] More preferably, the sliding positioning block has protrusions on both the top and bottom, the protrusions limiting the sliding positioning block to slide laterally within the elongated groove of the template fixing frame, and the template fixing frame limiting the longitudinal position of the sliding positioning block.

[0026] In this invention, embodiments 1-2 at least support the protection scope of the above-mentioned automatic inspection device for the contour of large vehicle body components.

[0027] Compared with the prior art, the present invention has at least the following beneficial effects: 1. In response to the problem that existing solutions use thin aluminum alloy templates for single-person operation, and that the aluminum plate structure of a single contour template has low strength, making it prone to shaking and difficult to control, this invention adds a template fixing frame and an adjustable measuring device to the original test template. It uses laser sensor measurement to replace manual visual measurement, thereby improving measurement accuracy and stability.

[0028] 2. To address the limitations of existing solutions in terms of operating location and the inconvenience of manual measurement, this measuring device uses a laser sensor to replace manual measurement and reading. This allows personnel to be in an ergonomic posture during measurement, reducing labor intensity.

[0029] 3. To address the issue of a large number of measurement personnel, laser sensor measurement reduces the need for multiple people to assist in manual measurement and recording, thereby reducing the number of measurement personnel required.

[0030] 4. To address the material waste caused by template cutting, the use of reusable structural main body and replaceable contour templates reduces the material required for templates and lowers manufacturing costs.

[0031] 5. To address the measurement data error caused by template tilt, all tire positions are currently parallel to the ground. A gravity acceleration sensor can be used to monitor the template's verticality. When verticality is detected, the laser sensor is locked to measure the dimensions, achieving automatic and accurate measurement. There is no need to visually inspect the template for verticality. Attached Figure Description

[0032] Figure 1 This is a three-dimensional schematic diagram (viewed from the front) of an automatic inspection device for the contour of large vehicle body components according to an embodiment of the present invention. Figure 2 This is a three-dimensional schematic diagram (viewed from the reverse side) of an automatic inspection device for the contour of large vehicle body components according to an embodiment of the present invention.

[0033] Figure 3 for Figure 1 A three-dimensional diagram of the left section; Figure 4 for Figure 2 A three-dimensional diagram of the right side of the middle section; Figure 5 for Figure 3 A partial schematic diagram of a longitudinal cross-section; Figure 6 for Figure 4 A partial schematic diagram of a longitudinal cross-section; Figure 7 This is a front view of the measuring device in an automatic inspection device for the contour of large vehicle body components according to an embodiment of the present invention; Figure 8 for Figure 7Sectional view along the middle AA direction; Figure 9 This is a three-dimensional schematic diagram (viewed from the reverse side) of the measuring device in the automatic inspection device for the contour of large vehicle body components according to an embodiment of the present invention. Figure 10 This is a three-dimensional schematic diagram (viewed from the front) of the measuring device in the automatic inspection device for the contour of large vehicle body components according to an embodiment of the present invention. Figure 11 This is an exploded view of the measuring device in an automatic inspection device for the contour of large vehicle body components according to an embodiment of the present invention; Figure 12 This is a perspective view of the front and back of the first housing of a measuring device according to an embodiment of the present invention; Figure 13 This is a perspective view of the front and back of the second housing of a measuring device according to an embodiment of the present invention; Figure 14 This is a front view of a corner of the housing of the measuring device according to an embodiment of the present invention; Figure 15 for Figure 14 A cross-sectional view obtained by cutting along the cutting direction in the middle; Figure 16 This is a schematic diagram of the measurement process of a measuring device according to an embodiment of the present invention; Figure 17 This is a perspective view of the installation method of the sliding positioning block in the first housing in a measuring device according to an embodiment of the present invention; Figure 18 This is a perspective view showing the positional relationship between the sliding connecting plate, the sliding positioning block, and the ranging module in a measuring device according to an embodiment of the present invention. Figure 19 This is a rear view of a measuring device according to an embodiment of the present invention; Figure 20 for Figure 19 A cross-sectional view along the CC direction; Figure 21 for Figure 19 Cross-sectional view along the EE direction; Figure 22 for Figure 19 A cross-sectional view along the FF direction; Figure 23 This is a perspective view of an embodiment of the present invention, showing how the sliding positioning block can be moved longitudinally by tightening or loosening the first knob; Figure 24 This is a schematic diagram of the sliding positioning block moving laterally in the elongated groove of the detection fixture according to an embodiment of the present invention; Figure 25 This is a schematic diagram illustrating how the sliding positioning block can be moved laterally by adjusting the tightness of the second knob, according to one embodiment of the present invention. Figure 26 This is a schematic diagram showing the positional relationship between the detection template and the sliding positioning block according to an embodiment of the present invention; Figure 27 For along Figure 26 The cross-sectional view obtained by cutting in the indicated direction.

[0034] In the diagram, 1. Template fixing frame; 2. Test template; 3. Measuring device; 4. Template fixing bolt; 5. Device fixing bolt; 3-1. Distance measuring module; 3-2. Sliding connecting plate; 3-3. First knob; 3-4. Second knob; 3-5. Digital tube electronic screen; 3-6. Sliding positioning block; 3-7. First housing; 3-8. Second housing; 3-9. Module housing; 3-10. Housing fixing bolt; 3-11. Sliding block fixing bolt; 3-12. Module housing fixing bolt; 3-13. Module fixing bolt; 3-14. Limiting structure; 3-15. Small cylindrical hole; 3-16. Large cylinder; 3-17. First knob mounting port; 3-18. Square hole; 3-19. Small cylinder; 3-20. Notch; 3-21. Long oval slide groove. Detailed Implementation

[0035] The following non-limiting embodiments are intended to enable those skilled in the art to gain a more comprehensive understanding of the present invention, but do not limit the invention in any way. The following content is merely an exemplary description of the scope of protection claimed by the present invention, and those skilled in the art can make various changes and modifications to the present invention based on the disclosed content, and such changes should also fall within the scope of protection claimed by the present invention.

[0036] The present invention will be further described below with reference to specific embodiments. Where not detailed, the same structure and process as existing sidewall modules are used.

[0037] Example 1 The automatic inspection device for the contour of large components of the vehicle body of the present invention will be described in detail below with reference to an embodiment of the present invention.

[0038] like Figures 1-27 As shown, the present invention provides an automatic inspection device for the contour of large vehicle body components, including a test template 2, a template fixing frame 1, and multiple measuring devices 3; The lower part of the test template 2 is drawn according to the standard shape outline of the large parts of the vehicle body; The upper part of the test sample 2 is fixed on the sample fixing frame 1, and the plurality of measuring devices 3 are slidably and spaced apart on the sample fixing frame 1; The measuring device 3 includes a housing, a ranging module 3-1, a sliding connecting plate 3-2, a sliding positioning block 3-6, a first knob 3-3, and a second knob 3-4; the first knob 3-3 and the second knob 3-4 are disposed on the housing, the ranging module 3-1 and the sliding connecting plate 3-2 are disposed inside the housing, and the sliding positioning block 3-6 is disposed outside the housing; The sliding positioning block 3-6 is connected to the template fixing frame 1. The sliding positioning block 3-6 can slide laterally on the template fixing frame 1 and is fixed by the second knob 3-4. The ranging module 3-1 is mounted on the sliding connecting plate 3-2. The sliding connecting plate 3-2 is connected to the sliding positioning block 3-6. The sliding positioning block 3-6 limits the sliding connecting plate 3-2 laterally. The sliding connecting plate 3-2 can slide longitudinally on the sliding positioning block 3-6 and is fixed by the first knob 3-3. The ranging module 3-1 can measure the distance between the outline of the large component of the vehicle body under test and the standard outer shape outline from the bottom of the outer shell.

[0039] In this embodiment, preferably, the outer surface of the test sample 2 that contacts the sample holder 1 is flush, and both the test sample 2 and the sample holder 1 are provided with threaded holes, and are fastened together by sample fixing bolts 4.

[0040] In this embodiment, preferably, the template fixing frame 1 has a long sliding groove in the middle, and the measuring device 3 is installed in conjunction with the long sliding groove; the template fixing frame 1 has a sliding groove notch at its end for disassembling and assembling the measuring device 3.

[0041] In this embodiment, preferably, the measuring device 3 is provided with a threaded hole, the test sample 2 is provided with a long sliding groove, the measuring device 3 can move on the test sample 2, and the measuring device 3 and the test sample 2 are fastened together by the device fixing bolt 5.

[0042] In this embodiment, preferably, the outer shell includes a first shell 3-7 and a second shell 3-8 connected to each other. The first shell 3-7 is provided with a first knob mounting port 3-17, and the first knob 3-3 contacts the sliding connecting plate 3-2 through the first knob mounting port 3-17. The second shell 3-8 is provided with a second knob mounting port, and the template fixing frame 1 is provided with an elongated groove 3-21. The second knob 3-4 passes through the elongated groove 3-21 of the template fixing frame 1 through the second knob mounting port and is threadedly connected to the sliding positioning block 3-6.

[0043] In this embodiment, more preferably, the first housing 3-7 is further provided with a large cylinder 3-16 and a small cylindrical hole 3-15, the sliding positioning block 3-6 is provided with a threaded countersunk hole matching the large cylinder 3-16, and the second housing 3-8 is provided with a threaded small cylinder 3-19 matching the small cylindrical hole 3-15. The first housing 3-7 and the second housing 3-8 are fastened together by a housing fixing bolt 3-10, which passes through the small cylindrical hole 3-15 of the first housing 3-7 and the threaded small cylinder 3-19 of the second housing 3-8. The first housing 3-7 and the sliding positioning block 3-6 are fastened together by a sliding block fixing bolt 3-11, which passes through the large cylinder 3-16 of the first housing 3-7 and the countersunk hole of the sliding positioning block 3-6. The embodiment also includes a digital tube electronic screen 3-5, the first housing 3-7 is provided with a limiting structure 3-14, and the digital tube electronic screen 3-5 is embedded in the limiting structure 3-14.

[0044] In this embodiment, and more preferably, the measuring device 3 includes multiple infrared laser ranging modules. The sliding connecting plate 3-2 is connected to the digital tube electronic screen 3-5. The infrared laser ranging module is also connected to a PLC data acquisition system to analyze and calculate the distance between the outline of the large component of the vehicle body to be tested and the standard outline measured by the infrared laser ranging module. The measuring device 3 also includes a gravity acceleration sensor. When the gravity acceleration sensor detects that the angle of the detection sample 2 reaches a preset standard, it locks the measurement data.

[0045] In this embodiment, more preferably, the sliding connecting plate 3-2 is provided with threaded holes, the infrared laser ranging module is fixed on the sliding connecting plate 3-2 by the module fixing bolt 3-13, and the second housing 3-8 is fixed on the sliding connecting plate 3-2 by the module housing fixing bolt 3-12.

[0046] In this embodiment, and more preferably, the sliding positioning block 3-6 has a groove in the middle to laterally limit the sliding connecting plate 3-2, allowing the sliding connecting plate 3-2 to move longitudinally within the groove. The sliding positioning block 3-6 has a circular hole in the middle, and the sliding connecting plate 3-2 has an elongated groove. The first knob 3-3 passes through the elongated groove and is screwed into the threaded hole in the sliding positioning block 3-6 to fix the sliding connecting plate 3-2. After the first knob 3-3 is loosened, the sliding connecting plate 3-2 can be longitudinally adjusted within the groove of the sliding positioning block 3-6, thereby adjusting the position of the infrared laser ranging module.

[0047] In this embodiment, and more preferably, the sliding positioning block 3-6 is provided with protrusions on both the top and bottom. The protrusions limit the sliding positioning block 3-6 to slide laterally within the elongated groove of the template fixing frame 1, and the template fixing frame 1 limits the longitudinal position of the sliding positioning block 3-6.

[0048] Example 2 The automatic inspection device for the contour of large components of the vehicle body of the present invention will be described in detail below with reference to an embodiment of the present invention.

[0049] like Figures 1-27 As shown, this invention provides an automatic inspection device for the contour of large vehicle body components, including a test template 2, a template holder 1, and multiple measuring devices 3; the structure is as follows. Figure 1-2 As shown; the main structure connection method is as follows Figure 3 , Figure 4 As shown.

[0050] The lower contour of the inspection template 2 is drawn based on the standard dimensions and outline of the major vehicle body components. The upper part of the inspection template 2 is embedded in the template fixing bracket 1 for installation and positioning. The outer surface of the inspection template 2 is flush with the outer surface of the template fixing bracket 1, and weight is reduced by openings. Both the inspection template 2 and the template fixing bracket 1 are provided with threaded holes, and are fastened together by template fixing bolts 4. This structure allows for the inspection of different components by replacing the inspection template 2, such as... Figure 5 As shown.

[0051] The template holder 1 has oval holes at both ends for hanging and storing the inspection template 2, and can be held by personnel during measurement. The template holder 1 has a long sliding groove in the middle, and the measuring device 3 is installed in conjunction with the long sliding groove. The position of the measuring device 3 on the inspection template 2 can be adjusted according to the size of large components or the location of welds on site. The template holder 1 has a notch at one end for disassembling and installing the measuring device 3. The measuring device 3 has threaded holes, and the inspection template 2 has a long sliding groove. The device fixing bolts 5 are inserted for fastening, which can be used for moving and fixing the measuring device 3. Figure 6 As shown.

[0052] Measuring device 3 is installed on inspection template 2 and is used to measure the contour of vehicle body parts. Its components and structure are as follows: Figures 7-11 As shown.

[0053] The measuring device 3 uses a detachable and assembleable outer shell to cover the internal components. The outer shell is divided into an upper shell 3-7 and a lower shell 3-8.

[0054] The upper shell 3-7 has a limiting structure 3-14 on its upper part, into which the digital tube electronic screen 3-5 can be inserted. The front of the upper shell 3-7 has a first knob mounting port 3-17, which is recessed and has a round hole. The first knob 3-3 can contact the sliding connecting plate 3-2 through the first knob mounting port 3-17. The back of the upper shell 3-7 has a large cylinder 3-16 and a small cylindrical hole 3-15, both threaded. The small cylindrical hole is used to connect the upper shell 3-7 and the lower shell 3-8, and the large cylindrical hole is used to support and assemble the sliding positioning block 3-6. See the structural diagram of the upper shell 3-7. Figure 12 .

[0055] The lower shell 3-8 has a small cylinder 3-19 on its back that mates with the small cylindrical hole in the upper shell 3-7. A square hole 3-18 is located at the bottom, allowing the sliding positioning block 3-6 to be inserted. A notch 3-20 is located at the bottom, allowing the sliding connecting plate 3-2 to be adjusted vertically. See the structural diagram of the lower shell 3-8. Figure 13 The upper shell 3-7 and the lower shell 3-8 are fastened together by outer shell fixing bolts 3-10, which pass through the large cylindrical hole in the lower shell 3-8 and are then fastened to the large cylindrical hole 3-16 with threaded holes on the upper shell 3-7. The connection structure is as follows: Figures 14-15 As shown.

[0056] The measuring device 3 is equipped with two sets of infrared laser ranging modules 3-1 for measuring the distance to the contour of the target component. It also has a built-in gravity acceleration sensor to monitor the template status. The sliding connecting plate 3-2 is connected to the upper digital tube electronic screen 3-5 via a data output line. The digital tube electronic screen 3-5 can display the measurement data on both sides of the weld in real time and can analyze and calculate the measurement data through a PLC data acquisition system, thereby calculating the difference between the standard contour distance and the actual measured distance. When the template is in use, it enters the measurement mode. When the gravity acceleration sensor detects that the angle of the detection template has reached a measurable value (i.e., when the Z-axis component is 100% ± 1%), it locks the measurement dimension, ultimately achieving the measurement of the component contour. Its composition is as follows: Figure 16 As shown.

[0057] The sliding positioning block 3-6 of the measuring device 3 has four countersunk holes, which are tightened by screwing the sliding block positioning bolt 3-11 into the threaded cylinder in the upper shell 3-7. Figure 17 As shown.

[0058] The sliding connecting plate 3-2 has threaded holes. The infrared laser ranging module 3-1 is fixed to the sliding connecting plate 3-2 by the module fixing bolts 3-13, and the lower shell 3-8 is fixed to the sliding connecting plate 3-2 by the module shell fixing bolts 3-12. Figure 18 As shown.

[0059] The sliding positioning block 3-6 has a groove in the middle, which limits the left and right movement of the sliding connecting plate 3-2. The sliding connecting plate 3-2 can move up and down in the groove of the sliding positioning block 3-6. The sliding positioning block 3-6 has a circular hole in the middle, through which the first knob 3-3 passes. Its screw part passes through the elongated groove on the sliding connecting plate 3-2 and screws into the threaded hole in the sliding positioning block 3-6. After tightening, a clamping force is generated between the knob and the sliding positioning block 3-6, thereby fixing the sliding connecting plate 3-2 and fixing the positions of the lower infrared laser ranging module 3-1, module housing 3-9 (used to encapsulate the ranging module 3-1), module fixing bolt 3-13, and module housing fixing bolt 3-12. After the first knob 3-3 is loosened, the sliding connecting plate 3-2 can be adjusted up and down in the groove of the sliding positioning block 3-6 through the elongated groove, thereby adjusting the vertical position of the laser sensor and its mating parts, realizing the measurement of different positions, heights, and different components. Figures 19-23 As shown.

[0060] The sliding positioning block 3-6 has protrusions on both the top and bottom, allowing it to slide left and right within the groove of the template holder 1. The template holder 1 limits the vertical position of the sliding positioning block 3-6. The second knob 3-4 passes through the elongated groove 3-21 of the template holder 1 and can be screwed into the threaded hole of the sliding positioning block 3-6. After tightening, it generates a clamping force between the knob, the template holder 1, and the sliding positioning block 3-6, thereby fixing the sliding positioning block 3-6 and achieving the purpose of adjusting the left and right position of the measuring device 3. Figures 24-27 As shown.

[0061] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. An automatic inspection device for the contour of large vehicle body components, characterized in that, Includes a test template, a template holder, and multiple measuring devices; The lower part of the test template is drawn according to the standard shape outline of the major components of the vehicle body. The upper part of the test sample is fixed on the sample fixing frame, and the plurality of measuring devices are slidably and spaced apart on the sample fixing frame; The measuring device includes a housing, a ranging module, a sliding connecting plate, a sliding positioning block, a first knob, and a second knob; the first knob and the second knob are disposed on the housing, the ranging module and the sliding connecting plate are disposed inside the housing, and the sliding positioning block is disposed outside the housing; The sliding positioning block is connected to the template fixing frame, and the sliding positioning block can slide laterally on the template fixing frame and is fixed by the second knob; The ranging module is mounted on the sliding connecting plate, the sliding connecting plate is connected to the sliding positioning block, the sliding positioning block limits the sliding connecting plate laterally, the sliding connecting plate can slide longitudinally on the sliding positioning block, and the sliding connecting plate is fixed by the first knob; The ranging module can measure the distance between the outline of the large component of the vehicle body under test and the standard outer shape outline from the bottom of the housing.

2. The automatic inspection device for the contour of large vehicle body components according to claim 1, characterized in that, The outer surfaces of the test sample and the sample holder are flush. Both the test sample and the sample holder are provided with threaded holes and are fastened together by sample fixing bolts.

3. The automatic inspection device for the contour of large vehicle body components according to claim 1, characterized in that, The template fixing frame has a long sliding groove in the middle, and the measuring device is installed in conjunction with the long sliding groove; the end of the template fixing frame has a sliding groove notch for the assembly and disassembly of the measuring device.

4. The automatic inspection device for the contour of large vehicle body components according to claim 1, characterized in that, The measuring device is provided with a threaded hole, and the test sample is provided with a long sliding groove. The measuring device can move on the test sample, and the measuring device and the test sample are fastened together by the device fixing bolts.

5. The automatic inspection device for the contour of large vehicle body components according to claim 1, characterized in that, The outer casing includes a first casing and a second casing connected to each other. The first casing has a first knob mounting port, through which the first knob contacts the sliding connecting plate. The second casing has a second knob mounting port, and the template fixing frame has an elongated groove. The second knob passes through the elongated groove of the template fixing frame through the second knob mounting port and is threadedly connected to the sliding positioning block.

6. The automatic inspection device for the contour of large vehicle body components according to claim 5, characterized in that, The first housing is provided with a large cylinder and a small cylinder hole. The sliding positioning block is provided with a threaded countersunk hole that matches the large cylinder. The second housing is provided with a threaded small cylinder that matches the small cylinder hole. The first housing and the second housing are fastened together by a housing fixing bolt, which passes through the small cylinder hole of the first housing and is fastened together with the threaded small cylinder on the second housing. The first housing and the sliding positioning block are fastened together by a sliding block fixing bolt, which passes through the large cylinder of the first housing and is fastened together with the countersunk hole of the sliding positioning block. The housing also includes a digital tube electronic screen. The first housing is provided with a limiting structure, and the digital tube electronic screen is embedded in the limiting structure.

7. The automatic inspection device for the contour of large vehicle body components according to claim 6, characterized in that, The measuring device includes multiple infrared laser ranging modules. The sliding connecting plate is connected to the digital tube electronic screen. The infrared laser ranging module is also connected to a PLC data acquisition system to analyze and calculate the distance between the outline of the large component of the vehicle body to be tested and the standard outline measured by the infrared laser ranging module. The measuring device also includes a gravity acceleration sensor. When the gravity acceleration sensor detects that the angle of the test sample reaches a preset standard, it locks the measurement data.

8. The automatic inspection device for the contour of large vehicle body components according to claim 7, characterized in that, The sliding connecting plate is provided with threaded holes. The infrared laser ranging module is fixed on the sliding connecting plate by module fixing bolts, and the second housing is fixed on the sliding connecting plate by module housing fixing bolts.

9. The automatic inspection device for the contour of large vehicle body components according to claim 8, characterized in that, The sliding positioning block has a groove in the middle to limit the sliding connecting plate laterally, and the sliding connecting plate can move longitudinally in the groove. The sliding positioning block has a circular hole in the middle, and the sliding connecting plate has an elongated groove. The first knob passes through the elongated groove and is screwed into the threaded hole in the sliding positioning block to fix the sliding connecting plate. After the first knob is loosened, the sliding connecting plate can be adjusted longitudinally in the groove of the sliding positioning block, thereby adjusting the position of the infrared laser ranging module.

10. The automatic inspection device for the contour of large vehicle body components according to claim 9, characterized in that, The sliding positioning block has protrusions on both the top and bottom. The protrusions limit the sliding positioning block to slide laterally within the elongated groove of the template fixing frame. The template fixing frame limits the longitudinal position of the sliding positioning block.

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