Airtightness detection tool for high-position brake lamp

Abstract

The utility model discloses an air tightness detection tool for a high-position brake lamp, which comprises a bottom plate, a clamp used for fixing the high-position brake lamp is arranged on the bottom plate, a groove matched with the upper side of a bottom shell of the high-position brake lamp is arranged on the clamp, and a first through hole used for avoiding the bottom shell structure of the high-position brake lamp is arranged in the groove. The lower side of the first through hole is provided with an inflation assembly capable of stretching and retracting up and down, and an inflation hole of the inflation assembly corresponds to an air hole in the high-position brake lamp bottom shell; a first clamping block and a second clamping block are oppositely arranged on the edge of the first through hole, the first clamping block is connected with a driving device, and the driving device drives the first clamping block to be close to or away from the first through hole. The tool is fixed through the elastic clamping piece on the bottom shell of the high-position brake lamp, so that a mask of the brake lamp faces upwards and is prevented from being scratched, and meanwhile, the tool is simple in structure and convenient to operate and maintain.

Description

Technical Field

[0001] This utility model relates to the technical field of airtightness testing of automotive lamps, specifically to an airtightness testing fixture for automotive high-mounted brake lights. Background Technology

[0002] The high-mounted brake light, also known as a high-mounted brake lamp, is typically installed at the upper rear of a vehicle to allow following vehicles to see the vehicle in front early and brake accordingly, preventing rear-end collisions. Defects in the airtightness of the high-mounted brake light can lead to water ingress or damage to the PCB board, affecting the light's performance and the module's lifespan. Therefore, airtightness testing is required before high-mounted brake lights leave the factory to prevent defective products from reaching OEMs and the market, potentially causing malfunctions.

[0003] Chinese Patent Application No. 201921634954.2 discloses a high-mounted brake lamp airtightness testing fixture. It has an upper top plate on a base plate supported by pillars. A fixed base is fixedly connected to the base plate, and the upper surface of the fixed base has a groove whose shape and size match the shape and size of the high-mounted brake lamp to be tested. A pressing mechanism is fixedly connected to the lower surface of the top plate, and a venting mechanism is fixedly connected to the pressing mechanism. The pressing mechanism presses the high-mounted brake lamp to be tested onto the fixed base, and the air tube of the venting mechanism is inserted into the vent hole of the lamp for inflation. During testing, the brake lamp face down is placed in the groove. The pressing mechanism moves downwards to press the high-mounted brake lamp into the groove and fix it in place, while also facilitating the connection between the venting mechanism and the vent hole, and allowing the air tube to be inserted into the vent hole for inflation testing of airtightness. However, when the clamping mechanism moves up and down to clamp or loosen and reset, the wiring harness of the brake light can easily interfere with the ventilation mechanism or the clamping mechanism. At the same time, in actual production, it has been found that brake lights that pass the airtightness test still have problems with air leakage or water ingress after being installed and used in vehicles. In addition, the method of fixing the face mask by inverting it can easily scratch the face mask and produce defective products. Utility Model Content

[0004] The purpose of this utility model is to provide an airtightness testing fixture for a high-mounted brake light. The fixture is fixed by an elastic clip on the bottom shell of the high-mounted brake light, so that the brake light cover faces upward to avoid being scratched by the fixture. At the same time, the fixture has a simple structure and is easy to operate and maintain.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-mounted brake light airtightness testing fixture includes a base plate, a clamp for fixing the high-mounted brake light on the base plate, a groove conforming to the upper side of the high-mounted brake light base shell on the clamp, a first through hole in the groove for avoiding the structure of the high-mounted brake light base shell, an inflation component that can move up and down on the lower side of the first through hole, the inflation hole of the inflation component corresponding to the vent hole on the high-mounted brake light base shell; a first clamping block and a second clamping block are also arranged opposite each other on the edge of the first through hole, the first clamping block is connected to a driving device, the driving device drives the first clamping block to move closer to or away from the first through hole.

[0007] Preferably, the clamp is further provided with a second through hole, which passes through the groove and intersects with the first through hole.

[0008] Preferably, the second clamping block is fixedly connected to the clamp.

[0009] Preferably, a notch is provided at the edge of the first through hole, the first clamping block and the second clamping block are disposed in the notch, and the shapes of the first clamping block and the second clamping block are continuous with the edge of the first through hole.

[0010] Preferably, there are two of each of the first clamping block and the second clamping block, with the two first clamping blocks respectively disposed on both sides of the second through hole, and the two second clamping blocks respectively disposed on both sides of the second through hole.

[0011] Preferably, the driving device includes a cylinder and a push plate. The cylinder is fixed on the base plate, and the push plate is fixedly connected to the telescopic rod of the cylinder. The first clamping block is provided with a connecting arm, and one end of the connecting arm is fixedly connected to the push plate.

[0012] Preferably, the driving device further includes a directional block, and a clamping block channel is provided on the clamp, the directional block being fixedly connected in the clamping block channel; a through-hole is provided on the directional block, and the connecting arm passes through the through-hole to connect with the push plate.

[0013] Preferably, the inflation assembly includes an inflation head and a pneumatic finger, the pneumatic finger is fixed on the base plate, and the inflation head is connected to the telescopic rod of the pneumatic finger; the outer wall of the inflation head is provided with an air inlet that is connected to an external airtightness detection device, and the inflation inlet is located on the upper side of the inflation head.

[0014] Preferably, a rubber plug is provided in the middle of the inflation head, the inflation hole is disposed on the rubber plug, and the inflation hole is sealed and connected with the air inlet; the rubber plug protrudes from the outer side wall of the inflation head.

[0015] Preferably, the base plate is also provided with a handle; and start switches are provided on both sides of the clamp.

[0016] Compared with existing technologies, the above technical solution has the following beneficial effects:

[0017] Analysis of the structure and airtightness testing process of brake lights with poor airtightness revealed that there were loose welds between the brake light cover and the base. However, during the airtightness testing process, the pressing mechanism would press down and compact the loose welds between the base and the cover, thus failing to detect products with poor airtightness. This invention addresses this problem by devising a method that performs airtightness testing solely by fixing the high-position brake light base to avoid the aforementioned issues.

[0018] It was also discovered that the base of the high-mounted brake light has elastic clips and fixing protrusions that connect with the vehicle body. Therefore, this invention improves the airtightness testing fixture, making it cooperate and fix it with the clip structure of the high-mounted brake light. That is, the airtightness fixture contacts the base of the high-mounted brake light to fix it, thereby improving the pass rate and accuracy of airtightness testing. At the same time, it can also avoid the problem of scratching the mask of the high-mounted brake light due to contact between the testing fixture and the mask.

[0019] Compared to the existing technology where the airtightness testing fixture includes a base plate and an upper top plate, and the high-position brake light is placed between the base plate and the upper top plate and then pressed down to fix it, in this utility model, the high-position brake light is directly placed in the groove, the second locking block and the first through hole form a pre-position for the high-position brake light, and then the movement of the first locking block can clamp and fix the high-position brake light, which is convenient to operate and easy to maintain. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of the present invention with a high-position brake light (inflated state) placed thereon;

[0022] Figure 3 This is a three-dimensional structural diagram of the clamp, drive assembly, and clamping block of this utility model;

[0023] Figure 4 This is a three-dimensional structural diagram of the clamp of this utility model;

[0024] Figure 5 This is a three-dimensional structural diagram of the inflatable component of this utility model;

[0025] Figure 6 A three-dimensional structural diagram of the high-mounted brake light;

[0026] Figure 7 A three-dimensional structural diagram of the high-mounted brake light at the second angle;

[0027] Figure 8This is a cross-sectional view of the clamp of this utility model (clamping the high-position brake light).

[0028] In the diagram, 1 is the base plate; 11 is the handle; 12 is the start switch; 2 is the clamp; 21 is the clamping block channel; 22 is the support rod; 23 is the first square rod; 3 is the inflation assembly; 31 is the pneumatic finger; 32 is the telescopic rod; 33 is the third third rod; 34 is the fixing plate; 4 is the first clamping block; 41 is the connecting arm; 5 is the second clamping block; 6 is the drive device; 61 is the cylinder; 62 is the push plate; 63 is the telescopic rod; 64 is the directional block; 65 is the through hole; 66 is the second square rod; 67 is the mounting plate; 7 is the inflation head; 71 is the outer wall; 72 is the air inlet; 73 is the rubber plug; 74 is the inflation hole; 8 is the groove; 81 is the first through hole; 82 is the second through hole; 83 is the notch; 9 is the high-position brake light; 91 is the bottom shell; 92 is the vent hole; 93 is the lamp cover; 94 is the top plate; 95 is the elastic card; 96 is the fixing protrusion; 97 is the first limiting part; 98 is the second limiting part; 99 is the wiring harness. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings:

[0030] like Figures 1 to 8 As shown, an airtightness testing fixture for a high-mounted brake light includes a base plate 1. A clamp 2 for fixing the high-mounted brake light 9 is provided on the base plate 1. The clamp 2 is fixedly connected to the base plate 1 via a support rod 22 and / or a first square rod 23. A groove 8 is provided on the clamp 2, conforming to the upper side of the high-mounted brake light base shell 91. A first through hole 81 for avoiding the structure of the high-mounted brake light base shell is provided within the groove 8. The brake light 9 includes a lamp cover 93 and a base shell 91. The base shell 91 forms a space for accommodating the high-mounted brake light assembly. A top plate 94 connected to the lamp cover 93 is provided on the upper side of the base shell 91, and the top plate 94 is integrally formed with the base shell 91. An elastic clip 95 and a fixing protrusion 96 are provided opposite each other on the side wall of the base shell 91. A first limiting portion 97 is formed between the elastic clip 95 and the top plate 94, and a second limiting portion 98 is formed between the fixing protrusion 96 and the top plate 94. That is, the groove 8 and the top plate 94 are conformal, and the first through hole 81 and the bottom shell 91 are also conformal.

[0031] An inflatable assembly 3 capable of vertical extension and retraction is provided on the lower side of the first through hole 81. The inflatable assembly 3 is fixed to the base plate 1 by a third rod 33. The inflation hole 74 of the inflatable assembly 3 corresponds to the vent hole 92 on the high-mounted brake light base shell 91. A first clamping block 4 and a second clamping block 5 are also provided opposite to each other on the edge of the first through hole 81. The first clamping block 4 is connected to a driving device 6, which is fixed to the base plate 1 by a second rod 66. The driving device 6 drives the first clamping block 4 to move closer to or away from the first through hole 81, and the second clamping block 5 is fixedly connected to the clamp 2. When the driving device 6 drives the first clamping block 4 away from the first through hole 81, the high-mounted brake light 9 is placed on the clamp 2, and after the base shell 91 enters the first through hole 81, the top plate 94 contacts the groove 8. At this time, the second clamping block 5 is engaged with the second limiting part 98. Then, the driving device 6 drives the first clamping block 4 to move closer to the first through hole 81 to abut against and compress the elastic card 95, so that the first clamping block 4 is engaged with the first limiting part 97. In this way, the first limiting part 97 and the elastic card 95 are fixed to each other, and the second limiting part 98 and the second clamping block 5 are fixed to each other, thus fixing the high-position brake light 9 and preventing the brake light from shaking up and down or back and forth. Finally, the inflation component 3 moves upward, so that the inflation hole 74 is aligned with the vent hole 92 for inflation. After inflation to a certain pressure, it immediately enters the pressure holding process. During the pressure holding process, if the pressure drops beyond the set pressure value, it is unqualified. The pressure drop value can be detected by the air tightness detection device.

[0032] The clamping force of the first clamping block 4 and the second clamping block 5 on the high-position brake lamp 9 is greater than the upward pushing force of the inflation assembly 3 on the high-position brake lamp 9. When the inflation assembly 3 pushes upward and makes a sealing contact with the vent hole 92, the high-position brake lamp 9 will not be displaced or misaligned.

[0033] The clamp 2 is also provided with a second through hole 82, which is used to avoid the wiring harness 99 of the high-mounted brake light. The width of the second through hole 82 is less than the length of the groove 8, and the second through hole 82 intersects the groove 8 and then passes through the groove 8. The second through hole 82 intersects and connects with the first through hole 81, which also facilitates the placement and removal of the high-mounted brake light 9. Preferably, the first clamping block 4 is provided with two elastic clips 95 that cooperate with the high-mounted brake light, and the second clamping block 5 is provided with two fixing protrusions 96 that cooperate with the high-mounted brake light. The two first clamping blocks 4 are respectively located on both sides of the second through hole 82, and the two second clamping blocks 5 are respectively located on both sides of the second through hole 82.

[0034] In one embodiment, a plurality of notches 83 are provided on the edge of the first through hole 81, and the first clamping block 4 and the second clamping block 5 are disposed in the notches 83. The shapes of the first clamping block 4 and the second clamping block 5 are continuous with the edge of the first through hole 81, so that the first clamping block 4 and the second clamping block 5 will not interfere with the bottom shell 91 of the high-mounted brake light and affect the position fixation of the high-mounted brake light 9 on the clamp 2.

[0035] In one embodiment, the drive device 6 includes a cylinder 61 and a push plate 62. A mounting plate 67 is screwed to the bottom end of the second square rod 66. The cylinder 61 is screwed to the mounting plate 67. The push plate 62 is fixedly connected to the telescopic rod 63 of the cylinder. One end of the first clamping block 4 extends to form a connecting arm 41, and one end of the connecting arm 41 is fixedly connected to the push plate 62. The telescopic rod 63 of the cylinder drives the push plate 62 to extend and retract, and the first clamping block 4 follows suit. Preferably, the mounting plate 67 has multiple screw holes to facilitate adjustment of the cylinder's position. Two telescopic rods 63 of the cylinder are provided, and the two first clamping blocks 4 are screwed to the same push plate 62, thus synchronizing the movement of the two first clamping blocks 4 and ensuring consistency when clamping the high-position brake light 9. Furthermore, the drive device 6 also includes a guide block 64, on which a through-hole 65 is provided. The connecting arm 41 passes through the through-hole 65 and connects to the push plate 62. The guide block 64 restricts the movement direction of the connecting arm 41 to be consistent with that of the telescopic rod 63 of the cylinder, preventing the connecting arm 41 from being misaligned. Even further, the clamp 2 is provided with a clamping block channel 21, which communicates with the notch 83 where the first clamping block 4 is located. The guide block 64 is fixedly connected within the clamping block channel 21.

[0036] In one embodiment, the inflation assembly 3 includes an inflation head 7 and a pneumatic finger 31. A fixing plate 34 is screwed to the top of a third rod 33. The pneumatic finger 31 is connected to the fixing plate 34. The telescopic rod 32 of the pneumatic finger is connected to the inflation head 7, and the telescopic rod 32 drives the inflation head 7 to move up and down relative to the fixing plate 34. An air inlet 72 connected to an external airtightness detection device is provided on the outer wall 71 of the inflation head 7. A rubber plug 73 is provided in the middle of the inflation head 7. An inflation hole 74 is vertically arranged on the rubber plug 73, and the inflation hole 74 is sealed and connected to the air inlet 72. After the high-mounted brake light 9 is fixed on the clamp 2, the pneumatic finger 31 drives the inflation head 7 upward, connecting the inflation port 74 with the vent 92 on the high-mounted brake light. The airtightness testing device is then activated, and air is injected into the high-mounted brake light 9 through the air inlet 72 and the inflation port 74. After inflation, a pressure holding process is initiated to check the airtightness of the high-mounted brake light 9. Furthermore, the rubber plug 75 protrudes beyond the outer wall 71 of the inflation head, allowing the pneumatic finger 31 to press the rubber plug 75 against the vent 92, achieving a sealed connection between the vent 92 and the inflation port 74.

[0037] In one embodiment, the base plate 1 is also provided with a handle 11 to facilitate the movement of the tooling; a start switch 12 is provided on both sides of the clamp 2, and the pneumatic switch 12 controls the operation of the drive device 6 and the inflation component 3. Compared with setting a start switch on one side, setting start switches 12 on both sides for simultaneous control can prevent accidental operation, safety accidents or scratches to the brake lights.

[0038] In one embodiment, the airtightness testing fixture of this invention can be connected to an airtightness testing device and its level can be recorded together with that of the airtightness testing device. In this way, after the fixture fixes the lamp, the inflation test can be started directly, thus integrating two processes into one process.

[0039] In the above technical solution, during use, the cylinder 61 drives the first clamping block 4 away from the first through hole 81 to facilitate the insertion of the high-mounted brake light 9; then, with the lamp cover 93 facing upward, the high-mounted brake light 9 is placed on the clamp 2, keeping the lower part of the bottom shell 91 inserted into the first through hole 81, and the top plate 94 is stuck in the groove 8. At this time, the second clamping block 5 will be located on the second limiting part 98 between the top plate 94 and the fixing protrusion 96; then the cylinder 61 pushes the first clamping block 4 to move towards the first through hole 81, the first clamping block 4 squeezes the elastic card 95, causing it to deform towards the bottom shell 91, and the first clamping block 4 is engaged with the first limiting part 97, that is, the high-mounted brake light 9 is clamped and fixed on the clamp 2. Finally, the pneumatic finger 31 pushes the inflation head 7 upwards, sealing the inflation port 74 with the vent 92. The external airtightness testing device then inflates the high-position brake light 9 to the specified pressure and enters a pressure-holding process. During this process, if the pressure drop exceeds the set pressure value, it is considered unqualified. The pressure drop can be detected by the airtightness testing device. The external airtightness testing device has already been sealed to the air inlet 72.

[0040] The above embodiments are merely illustrative of the concept and implementation of this utility model, and are not intended to limit it. Under the concept of this utility model, the technical solutions without substantial changes are still within the scope of protection.

Claims

1. A fixture for airtightness testing of a high-mounted brake light, comprising a base plate, wherein a clamp for fixing the high-mounted brake light is provided on the base plate, characterized in that, The fixture has a groove that conforms to the upper side of the high-mounted brake light base shell. A first through hole is provided in the groove to avoid the structure of the high-mounted brake light base shell. An inflation component that can move up and down is provided on the lower side of the first through hole. The inflation hole of the inflation component corresponds to the vent hole on the high-mounted brake light base shell. A first clamping block and a second clamping block are also provided opposite to each other on the edge of the first through hole. The first clamping block is connected to a driving device. The driving device drives the first clamping block to move closer to or away from the first through hole.

2. The airtightness testing fixture for the high-position brake light as described in claim 1, characterized in that, The fixture is also provided with a second through hole, which passes through the groove and intersects with the first through hole.

3. The airtightness testing fixture for the high-position brake light as described in claim 2, characterized in that, The second clamping block is fixedly connected to the clamp.

4. The airtightness testing fixture for the high-position brake light as described in claim 3, characterized in that, A notch is provided at the edge of the first through hole, and the first clamping block and the second clamping block are disposed in the notch, and the shapes of the first clamping block and the second clamping block are continuous with the edge of the first through hole.

5. The airtightness testing fixture for the high-position brake light as described in claim 4, characterized in that, There are two of each of the first clamping block and the second clamping block. The two first clamping blocks are respectively disposed on both sides of the second through hole, and the two second clamping blocks are respectively disposed on both sides of the second through hole.

6. The airtightness testing fixture for a high-position brake light as described in claim 1 or 5, characterized in that, The driving device includes a cylinder and a push plate. The cylinder is fixed on the base plate, and the push plate is fixedly connected to the telescopic rod of the cylinder. The first clamping block is provided with a connecting arm, and one end of the connecting arm is fixedly connected to the push plate.

7. The airtightness testing fixture for the high-position brake light as described in claim 6, characterized in that, The driving device also includes a directional block, and a clamping block channel is provided on the clamp, with the directional block fixedly connected in the clamping block channel; a through-hole is provided on the directional block, and the connecting arm passes through the through-hole to connect with the push plate.

8. The airtightness testing fixture for a high-position brake light as described in claim 1 or 7, characterized in that, The inflation assembly includes an inflation head and a pneumatic finger. The pneumatic finger is fixed to the base plate, and the inflation head is connected to the telescopic rod of the pneumatic finger. An air inlet is provided on the outer wall of the inflation head to connect with an external airtightness detection device, and the air inlet is located on the upper side of the inflation head.

9. The airtightness testing fixture for the high-position brake light as described in claim 8, characterized in that, A rubber plug is provided in the middle of the inflation head, and the inflation hole is located on the rubber plug, and the inflation hole is sealed and connected to the air inlet; the rubber plug protrudes from the outer side wall of the inflation head.

10. The airtightness testing fixture for the high-position brake light as described in claim 1, characterized in that, The base plate is also equipped with a handle; start switches are provided on both sides of the clamp.

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