Headlamp test fixture

Abstract

The utility model discloses a headlight test fixture, and relates to the technical field of automobile headlight testing, the headlight test fixture comprises a pedestal, an adjusting mechanism, a fixing frame, a support, an angle measuring instrument and a transparent sealing cover, the adjusting mechanism is used for adjusting the position of the pedestal in the space; the fixing frame is arranged on the top of the base. The support is used for being connected with a lamplight module and detachably connected with the fixing frame. The angle measuring instrument is arranged on the base and used for measuring the included angle between the base and the horizontal plane. The base is covered with the transparent sealing cover, a closed cavity is defined by the transparent sealing cover and the base, and the support and the lamplight module are both arranged in the closed cavity. The transparent sealing cover covers the base and forms the closed cavity for accommodating the lamplight module with the base, so that the measurement environment of the lamplight module arranged in the lamp shell can be simulated, the influence of the bracket on the measurement of the lamplight module can be independently determined, the strength of the bracket is ensured in advance, and the mold repairing frequency of the bracket is reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive headlight testing technology, and in particular to a headlight testing fixture. Background Technology

[0002] According to regulations, the change in the vertical position of the low beam cut-off line under heat must meet regulatory requirements. The biggest factor affecting the heat-induced sag of the low beam cut-off line is the bracket that secures the low beam module (e.g., material, size, strength). Traditional tests for heat-induced sag of the low beam cut-off line directly test the entire lamp. Components such as the lamp housing and lampshade also affect the measurement after being heated, making it impossible to clearly determine the impact of the bracket on the heat-induced sag of the low beam cut-off line. This necessitates multiple bracket modifications for confirmation, increasing modification costs. Utility Model Content

[0003] The main purpose of this utility model is to propose a headlight testing fixture, which aims to solve the technical problem of how to reduce the cost of mold repair.

[0004] To achieve the above objectives, the headlight testing fixture proposed in this utility model includes:

[0005] Base;

[0006] An adjustment mechanism for adjusting the position of the base in space;

[0007] A fixing frame is disposed on the top of the base;

[0008] A bracket for connecting to a lighting module, wherein the bracket is detachably connected to the mounting bracket.

[0009] An angle measuring instrument, which is mounted on the base, is used to measure the angle between the base and the horizontal plane;

[0010] A transparent sealing cover is provided on the base, and the transparent sealing cover and the base form a sealed cavity. The bracket and the light module are both disposed in the sealed cavity.

[0011] In one embodiment, the bracket surrounds the periphery of the lighting module. The fixing frame includes a first column, a second column, and a fixing plate. The first column and the second column are spaced apart. The two ends of the fixing plate are respectively connected to the first column and the second column. The fixing plate has a clearance hole for avoiding the lighting module. The bracket and the fixing plate are detachably connected.

[0012] In one embodiment, the bracket is provided with a threaded fastener, and the fixing plate has a positioning hole for the threaded fastener to pass through, so that the threaded fastener can be threadedly connected to the nut after passing through the positioning hole.

[0013] In one embodiment, the number of threaded fasteners is multiple, and the number of positioning holes is the same as the number of threaded fasteners and they are set in a one-to-one correspondence.

[0014] In one embodiment, the headlight testing fixture further includes a first level measuring instrument and a second level measuring instrument, both of which are disposed on the base. The first level measuring instrument extends along a first direction, and the second level measuring instrument extends along a second direction. The first direction and the second direction are perpendicular to each other.

[0015] In one embodiment, the headlight testing fixture further includes a screen and an illuminance meter disposed on the screen, the illuminance meter being disposed toward the light-emitting side of the headlight module.

[0016] In one embodiment, the headlight testing fixture further includes a heating module disposed within the sealed cavity for adjusting the temperature of the sealed cavity.

[0017] In one embodiment, the headlight testing fixture further includes a temperature measuring instrument, which is disposed on the base and located inside a sealed cavity. The temperature measuring instrument is used to detect the temperature inside the sealed cavity.

[0018] In one embodiment, the headlight test fixture further includes a timer for displaying the time during which the headlight module is tested.

[0019] In one embodiment, the bracket is a one-piece molded component.

[0020] The technical solution of this utility model uses a bracket to directly connect to a fixed frame, thereby fixing the light module connected to the bracket. A transparent sealing cover is placed on the base and forms a sealed cavity with the base to accommodate the light module. This can simulate the measurement environment of the light module set in the lamp housing, and thus realize the effect of the bracket on the measurement of the light module independently. It avoids the influence of the lamp housing and lamp cover on the measurement, ensures the strength of the bracket in advance, reduces the number of times the bracket needs to be repaired, and reduces the repair cost. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 An exploded structural diagram of an embodiment of the headlight testing fixture provided by this utility model;

[0023] Figure 2 A schematic diagram of a structure of an embodiment of the headlight testing fixture provided by this utility model;

[0024] Figure 3 This is a schematic diagram of another embodiment of the headlight testing fixture provided by this utility model.

[0025] Explanation of icon numbers:

[0026] 100. Headlight testing fixture; 1. Base; 2. Fixture; 21. First column; 22. Second column; 23. Fixing plate; 231. Clearance hole; 232. Positioning hole; 3. Bracket; 31. Threaded fastener; 32. Nut; 4. Angle measuring instrument; 5. Transparent sealing cover; 51. Sealed cavity; 61. First level measuring instrument; 62. Second level measuring instrument; 7. Heating module; 8. Adjustment mechanism; 9. Screen; 10. Illuminance meter;

[0027] 200. Lighting module.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0030] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] According to regulations, the change in the vertical position of the low beam cut-off line under heat must meet regulatory requirements. The biggest factor affecting the heat-induced sag of the low beam cut-off line is the bracket that secures the low beam module (e.g., material, size, strength). Traditional tests for heat-induced sag of the low beam cut-off line directly test the entire lamp. Components such as the lamp housing and lampshade also affect the measurement after being heated, making it impossible to clearly determine the impact of the bracket on the heat-induced sag of the low beam cut-off line. This necessitates multiple bracket modifications for confirmation, increasing modification costs.

[0033] The inventors discovered that, because lighting modules are generally standard parts, when the low beam is in the design stage, the lamp housing and lampshade have not yet been molded. Since current testing is done on the entire lamp, the test data is also affected by the lamp housing and lampshade. This means that even if the bracket is modified to meet regulatory requirements for the cut-off angle of the low beam, the strength of the modified bracket may still not meet the requirements due to the influence of the lamp housing and lampshade on the measurement results. Furthermore, if the shape of the lamp housing and lampshade changes after molding, the measurement results will deviate from the previous measurements when the entire lamp is tested after molding. If measurements are taken using the molded lamp housing and lampshade and the cut-off angle of the low beam does not meet regulatory requirements, the influence of the bracket cannot be corrected quickly and timely before the lamp housing and lampshade are molded. The bracket needs to be modified again, increasing the number of modification attempts and costs, which is time-consuming and labor-intensive.

[0034] This utility model proposes a headlight testing fixture, aiming to solve the technical problem of how to reduce the cost of mold repair.

[0035] Please see Figure 1 and Figure 2In one embodiment of this utility model, the headlight testing fixture 100 includes a base 1, an adjustment mechanism 8, a fixing frame 2, a support 3, an angle measuring instrument 4, and a transparent sealing cover 5. The adjustment mechanism 8 is used to adjust the position of the base 1 in space; the fixing frame 2 is disposed on the top of the base 1; the support 3 is used to connect with the light module 200, and the support 3 and the fixing frame 2 are detachably connected; the angle measuring instrument 4 is disposed on the base 1 and is used to measure the angle between the base 1 and the horizontal plane; the transparent sealing cover 5 is disposed on the base 1, and the transparent sealing cover 5 and the base 1 form a sealed cavity 51, and the support 3 and the light module 200 are both disposed in the sealed cavity 51.

[0036] The technical solution of this utility model uses a bracket 3 directly connected to a fixing frame 2 to fix the light module 200 connected to the bracket 3. A transparent sealing cover 5 is placed on the base 1, forming a sealed cavity 51 to accommodate the light module 200. This simulates the measurement environment of the light module 200 installed inside the lamp housing. By eliminating the lamp housing and lamp cover, the influence of the bracket 3 on the measurement of the light module 200 can be determined independently, eliminating the influence of the lamp housing and lamp cover on the measurement. This allows for more accurate mold repair of the bracket 3 based on the measurement data, ensuring the strength of the bracket 3 in advance and reducing the number of mold repairs and repair costs. It should be noted that the adjustment mechanism 8 can be a three-axis displacement platform or a robotic arm; no limitation is made here. The adjustment mechanism 8 can move the base 1 along the x, y, and z axes, and can also rotate the base 1 along the x, y, and z axes.

[0037] Furthermore, the inventors discovered that existing methods for measuring low beam headlights typically involve testing a single headlight. The cutoff line is adjusted on a standard rotating platform, ensuring the low beam illuminates a screen 9 10 meters away, with the cutoff line horizontal. The heights of the cutoff line on screen 9 at 3 minutes and 60 minutes are measured using a ruler and recorded as h1 and h2. The height difference is determined through repeated measurements, and the corresponding downward angle Δα = arctan(h1 / 10) - arctan(h2 / 10) is calculated. This method, relying on manual visual estimation of the cutoff line height, introduces visual errors, leading to inaccurate measurement results. Consequently, the bracket 3 needs to be remodeled based on inaccurate measurement data. Even after remodeling, if the correct measurement data is used, the bracket 3 still does not meet the requirements, necessitating repeated remodeling until it meets the measurement requirements, thus increasing the number of remodeling operations.

[0038] In this embodiment, by setting an angle measuring instrument 4 on the bracket 3, the angle change of the base 1 can be displayed intuitively, avoiding the visual error that exists in manual size measurement, improving the accuracy of measurement data, and enabling the bracket 3 to be modified according to more accurate measurement data, thereby reducing the number of times the bracket 3 needs to be modified.

[0039] Please see Figure 2 In one embodiment, the bracket 3 surrounds the lighting module 200. The fixing bracket 2 includes a first column 21, a second column 22, and a fixing plate 23. The first column 21 and the second column 22 are spaced apart. The two ends of the fixing plate 23 are connected to the first column 21 and the second column 22, respectively. The fixing plate 23 has a clearance hole 231 for avoiding the lighting module 200. The bracket 3 is detachably connected to the fixing plate 23. By providing a clearance hole 231 on the fixing plate 23 to avoid the lighting module 200, the light-emitting side of the lighting module 200 can pass through smoothly. Compared with fixing the lighting module 200 to one side of the fixing plate 23, the design of allowing the lighting module 200 to pass through the clearance hole 231 occupies less space.

[0040] Please see Figure 1 and Figure 2 In one embodiment, the bracket 3 is provided with a threaded fastener 31, and the fixing plate 23 has a positioning hole 232 for the threaded fastener 31 to pass through. After passing through the positioning hole 232, the threaded fastener 31 can be threadedly connected to the nut 32. The threaded fastener 31 can be a bolt or a ball head screw, which is not limited here. By passing the threaded fastener 31 through the positioning hole 232 and then threading it to the nut 32, the bracket 3 and the fixing plate 23 are detachably connected, which facilitates the replacement of the lighting module 200. That is, after one lighting module 200 is tested, the lighting module 200 and the bracket 3 are removed together, and another lighting module 200 and the bracket 3 connected to it are installed for testing. The screw engagement of the threaded fastener 31 and the nut 32 facilitates replacement and disassembly.

[0041] According to one embodiment of the present invention, a locking block is provided on the bracket 3 and a locking groove is provided on the fixing plate 23. The locking block and the locking groove engage with each other, thereby realizing the detachable connection between the bracket 3 and the fixing plate 23, which also facilitates the replacement of the lighting module 200.

[0042] Please see Figure 1 In one embodiment, there are multiple threaded fasteners 31, and the number of positioning holes 232 is the same as the number of threaded fasteners 31, and they are set one-to-one. By setting multiple threaded fasteners 31, a positioning hole 232 is provided on the fixing plate 23 for each threaded fastener 31, and a nut 32 is provided for each threaded fastener 31, thereby effectively improving the connection strength and reliability between the bracket 3 and the fixing plate 23.

[0043] Please see Figure 1 and Figure 2In one embodiment, the headlight testing fixture 100 further includes a first level measuring instrument 61 and a second level measuring instrument 62. Both the first level measuring instrument 61 and the second level measuring instrument 62 are mounted on the base 1. The first level measuring instrument 61 extends along a first direction, and the second level measuring instrument 62 extends along a second direction, with the first and second directions perpendicular to each other. By setting the first and second level instruments, it is possible to observe whether the adjustment mechanism 8 has adjusted the base 1 to a horizontal state, facilitating subsequent testing of the headlight module 200 and ensuring the accuracy of the test data. The first direction is... Figure 2 The front and back directions are shown, and the second direction is... Figure 2 The left and right directions are shown.

[0044] Please see Figure 3 In one embodiment, the headlight testing fixture 100 further includes a screen 9 and an illuminance meter 10 disposed on the screen 9, with the illuminance meter 10 facing the light-emitting side of the lighting module 200. The illuminance meter 10 is disposed on the side of the screen 9 facing the lighting module 200, and is used to detect the intensity of the light emitted from the lighting module 200 towards the illuminance meter 10, thereby adjusting the angle of the base 1 according to the value.

[0045] For example, to test a lighting module 200, first install the bracket 3 on the fixed plate 23, then adjust the base 1 to be level using the adjustment mechanism 8, then turn on the lighting module 200 and start timing. Adjust the up / down or left / right position of the lighting module 200 using the adjustment mechanism 8 so that the light of the preset illuminance shines on the illuminance meter 10. Set the angle measuring instrument 4 to zero, then cover it with the transparent sealing cover 5. After 3 minutes, if the light cutoff line moves up, adjust the base 1 downwards using the adjustment mechanism 8 so that the light of the preset illuminance shines on the meter 10 again. On the illuminance meter 10, record the value of the angle measuring instrument 4 at this time. After 60 minutes, if the light and dark cutoff line moves up, adjust the base 1 downward by adjusting the adjustment mechanism 8 so that the light of the preset illuminance shines on the illuminance meter 10 again. Record the value of the angle measuring instrument 4 at this time. Subtract the value of the angle measuring instrument 4 recorded at 60 minutes from the value recorded at 3 minutes and take the absolute value to obtain Δα. Then, judge whether it meets the regulatory requirements based on the value of Δα. If it meets the requirements, the test is completed; if it does not meet the requirements, the bracket 3 needs to be modified.

[0046] Please see Figure 3In one embodiment, the headlight testing fixture 100 further includes a heating module 7, which is disposed within a sealed cavity 51 and used to regulate the temperature of the sealed cavity 51. By adding the heating module 7, the testing process is accelerated, thereby enabling the rapid acquisition of test results similar to standard tests. For example, given the input power and luminous efficiency of the headlight module 200, the heat generation power of the headlight module 200 can be calculated. Given that the test time for the headlight module 200 is 60 minutes, the total heat generation of the headlight module 200 during these 60 minutes can be calculated as Q1. In practical applications, since traditional testing requires recording the angle at 3 minutes and then waiting 57 minutes to obtain the second measurement value, the total heat generation of the headlight module 200 during these 57 minutes can be calculated as Q2 based on the heat generation power of the headlight module 200 and the waiting time of 57 minutes. If the waiting time needs to be reduced to 20 minutes, this would reduce the time for the headlight module 200 by 57 - 20 = 37 minutes. The heat generated during the heating time is denoted as Q3, where the heat generated by the light module 200 during these 37 minutes is Q3. In this embodiment, the heating module 7 can generate heat of not less than Q3 within 20 minutes, thereby simulating the temperature inside the sealed cavity 51 after the light module 200 has been working for 60 minutes. Thus, only 20 minutes are needed to obtain a value result very close to the standard measurement, greatly shortening the test time and improving the test efficiency. Since the heat generated by the heating module 7 is not less than Q3, the environmental temperature simulated by the heating module 7 is more stringent. If the strength of the bracket 3 can pass the test under this environment, then the bracket 3 can be used for a regular test, and it will basically pass as well, meeting the test requirements. Therefore, by adding the heating module 7, test results close to those of a regular test can be obtained in a shorter time, greatly improving the test efficiency.

[0047] In one embodiment, the headlight testing fixture 100 further includes a temperature measuring instrument (not shown). The temperature measuring instrument is mounted on the base 1 and located inside the sealed cavity 51. The temperature measuring instrument is used to detect the temperature inside the sealed cavity 51. By setting the temperature measuring instrument, the temperature changes inside the sealed cavity 51 are monitored in real time. If the temperature inside the sealed cavity reaches T1 degrees Celsius after the headlight module 200 has been working for 60 minutes, and if it is necessary to shorten the test time, the heating module 7 can be turned on. After a period of time, the temperature inside the sealed cavity 51 can be judged based on the value of the temperature measuring instrument. If it has reached T1 degrees Celsius, it can be approximately considered that the headlight module 200 has been working for 60 minutes. It should be noted that the addition of the heating module 7 is not intended to provide a replacement for the original formal test, but rather to obtain test data that is closer to the original test more quickly, thereby shortening the measurement time.

[0048] In one embodiment, the headlight test fixture 100 also includes a timer (not shown) for displaying the testing time of the headlight module 200. By setting the timer, the operator can easily understand the elapsed testing time based on the information displayed on the timer, so that the operator can read the required values ​​on time.

[0049] In one embodiment, the support 3 is a one-piece molded component. The one-piece molded nature of the support 3 provides higher structural strength and facilitates production.

[0050] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A headlight testing fixture, characterized in that, include: Base; An adjustment mechanism for adjusting the position of the base in space; A fixing frame is disposed on the top of the base; A bracket for connecting to a lighting module, wherein the bracket is detachably connected to the mounting bracket. An angle measuring instrument, which is mounted on the base, is used to measure the angle between the base and the horizontal plane; A transparent sealing cover is provided on the base, and the transparent sealing cover and the base form a sealed cavity. The bracket and the light module are both disposed in the sealed cavity.

2. The headlight testing fixture as described in claim 1, characterized in that, The bracket is arranged around the periphery of the lighting module. The fixing frame includes a first column, a second column and a fixing plate. The first column and the second column are spaced apart. The two ends of the fixing plate are respectively connected to the first column and the second column. The fixing plate has a clearance hole for avoiding the lighting module. The bracket and the fixing plate are detachably connected.

3. The headlight testing fixture as described in claim 2, characterized in that, The bracket is equipped with threaded fasteners, and the fixing plate has a positioning hole for the threaded fasteners to pass through. After passing through the positioning hole, the threaded fasteners can be threadedly connected to the nut.

4. The headlight testing fixture as described in claim 3, characterized in that, The number of threaded fasteners is multiple, and the number of positioning holes is the same as the number of threaded fasteners and they are set in a one-to-one correspondence.

5. The headlight testing fixture as described in claim 1, characterized in that, The headlight testing fixture also includes a first level measuring instrument and a second level measuring instrument. Both the first level measuring instrument and the second level measuring instrument are disposed on the base. The first level measuring instrument extends along a first direction, and the second level measuring instrument extends along a second direction. The first direction and the second direction are perpendicular to each other.

6. The headlight testing fixture as described in any one of claims 1 to 5, characterized in that, The headlight test fixture also includes a screen and an illuminance meter mounted on the screen, with the illuminance meter facing the light-emitting side of the headlight module.

7. The headlight testing fixture as described in any one of claims 1 to 5, characterized in that, The headlight testing fixture also includes a heating module, which is disposed in the sealed cavity and is used to adjust the temperature of the sealed cavity.

8. The headlight testing fixture as described in claim 7, characterized in that, The headlight testing fixture also includes a temperature measuring instrument, which is disposed on the base and located inside a sealed cavity. The temperature measuring instrument is used to detect the temperature inside the sealed cavity.

9. The headlight testing fixture as described in any one of claims 1 to 5, characterized in that, The headlight test fixture also includes a timer, which is used to display the time for testing the headlight module.

10. The headlight testing fixture as described in any one of claims 1 to 5, characterized in that, The bracket is a one-piece molded component.

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