Rear-mounted LED automobile and motorcycle headlamp

Abstract

The utility model belongs to the technical field of illuminating lamps for vehicles, and discloses a rear-mounted LED automobile and motorcycle headlamp which comprises a main body shell, a fixing structure and lamp beads are arranged in the main body shell, an active heat dissipation device is arranged on one side of the main body shell, and a passive heat dissipation aluminum radiator is arranged on the rear side of the main body shell. The side, away from the body shell, of the aluminum radiator is provided with a plug, the body shell comprises a plastic lamp shell A and a plastic lamp shell B, the active heat dissipation device is a cake-shaped heat dissipation fan, a shell of the heat dissipation fan is clamped in the body shell, the output direction of the heat dissipation fan faces the interior of the body shell, and the fixing structure comprises a copper plate. The automobile halogen lamp is compact and reasonable in structural design, the size of the automobile halogen lamp is 1: 1 with that of an original automobile halogen lamp, the automobile halogen lamp is easy to use and install, the automobile halogen lamp does not internally contain a power supply wire, the wire can be prevented from falling off due to vibration, and the automobile halogen lamp is very good in heat dissipation performance and long in service life.

Description

Technical Field

[0001] This utility model relates to the field of vehicle lighting technology, specifically to a retrofit LED headlight for cars and motorcycles. Background Technology

[0002] With the rapid development of the automotive and motorcycle industries, consumers have increasingly higher requirements for vehicle lighting systems. They not only expect brighter and more stable lighting effects, but also hope that the lamps have a longer service life and higher reliability.

[0003] Existing automotive and motorcycle headlights suffer from significant deficiencies in heat dissipation. During operation, especially over extended periods, the LED chips continuously generate substantial heat. Taking traditional halogen lamps as an example, their luminous efficiency is relatively low, with most electrical energy being converted into heat rather than light, causing a rapid increase in internal temperature. While early LED headlights offered improved luminous efficiency, their heat dissipation designs were often inadequate. Many LED headlights relied solely on simple metal casings for natural heat dissipation, a passive method severely insufficient for high-intensity lighting demands. As the headlights age, internal heat accumulates, leading to excessively high LED chip temperatures. When these temperatures exceed their normal operating range, a series of problems arise. First, luminous efficiency drops drastically, gradually reducing light brightness and failing to provide clear, bright illumination, severely impacting driving safety at night or in adverse weather conditions. Second, high temperatures accelerate the aging process of the LED chips, shortening their lifespan and forcing drivers to frequently replace the lights, increasing operating costs and inconvenience.

[0004] During vehicle operation, continuous and complex vibrations are inevitable. This vibrational environment poses a significant threat to the wiring inside the headlights. Traditional headlights extensively use power cables for electrical transmission, and under prolonged vibration, these cables are prone to loosening. Loose cables increase contact resistance at connection points, leading to localized heating and further accelerating cable aging. More seriously, vibration can cause the cables to detach from their solder joints, interrupting the power transmission path and causing the headlights to suddenly go out. This not only causes significant inconvenience to the driver but can also lead to serious traffic accidents in certain emergencies. Furthermore, aging cables not only affect the stability of power transmission but can also cause short circuits and other malfunctions, damaging the vehicle's electrical system and resulting in high repair costs. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides an aftermarket LED car and motorcycle headlight that solves the problems mentioned in the background section, such as poor heat dissipation performance of existing headlights and the tendency for internal wiring to detach due to vehicle vibration.

[0007] (II) Technical Solution

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a retrofit LED car and motorcycle headlight, comprising a main body shell, a fixing structure and an LED bead are provided inside the main body shell, an active heat dissipation device is provided on one side of the main body shell, a passive heat dissipation aluminum heat sink is provided at the rear of the main body shell, and a plug is provided on the side of the aluminum heat sink away from the LED bead.

[0009] Preferably, the main body shell includes a plastic lamp housing A and a plastic lamp housing B. Both plastic lamp housing A and plastic lamp housing B are semi-circular strip structures. Plastic lamp housing A and plastic lamp housing B are spliced ​​together to form a cylindrical main body shell. Plastic lamp housing B is provided with multiple sets of internally threaded posts. Plastic lamp housing A is provided with fixing holes corresponding to the internally threaded posts. Plastic lamp housing A and plastic lamp housing B are fixedly connected by multiple sets of fixing screws.

[0010] Preferably, the active cooling device is a disc-shaped cooling fan, with the fan housing snapped into the main body housing and the fan output direction facing inwards from the main body housing.

[0011] Preferably, the fixing structure includes a copper plate with through holes corresponding to the internal threaded posts. The copper plate is fixed between the plastic lamp housing A and the plastic lamp housing B by multiple sets of internal threaded posts. Multiple sets of lamp beads are fixedly installed on the copper plate. A connector is provided on the side of the copper plate away from the heat dissipation fan. Heat pipes are provided on both sides of the copper plate near the connector.

[0012] Preferably, the aluminum heat sink is processed with multiple sets of heat dissipation fins, the center of the aluminum heat sink is provided with a plug interface corresponding to the plug connector, and the two sides of the plug interface are provided with circular plug holes corresponding to the heat pipes. The aluminum heat sink is sleeved on the side of the copper plate away from the cooling fan, and the plug connector is inserted into the plug interface, and the two sets of heat pipes are inserted into the circular plug holes.

[0013] Preferably, a PCB board is provided between the aluminum heat sink and the plug, the PCB board is provided with a driving circuit, the PCB board is provided with three sets of electrical plug holes, the plug is provided with three sets of electrical pins, and the plug and the PCB board are electrically connected through the electrical pins.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a retrofit LED headlight for automobiles and motorcycles, which has the following advantages:

[0016] 1. This aftermarket LED car and motorcycle headlight features a main housing, cooling fan, copper plate, LED beads, heat pipe, and aluminum heat sink. It is 1:1 in size with the original halogen headlight, making it easy to use and install. It does not include power wires, which prevents vibration from causing the wires to come loose. The device has excellent heat dissipation performance and a long service life.

[0017] 2. Equipped with a high-speed cooling fan, the fan's rotation enables high-speed airflow, and the fan's output end faces the inside of the main casing. The cool air flows sequentially through the copper plate to the aluminum heat sink, where it comes into contact with multiple sets of heat dissipation fins for heat exchange. The excellent airflow design prevents heat accumulation and results in very good heat dissipation.

[0018] 3. A copper plate is used as a fixing structure, and heat pipes are installed on both sides of the copper plate to conduct heat to the aluminum heat sink. The aluminum heat sink fins increase the air contact area, increase the heat exchange efficiency, and have high heat dissipation efficiency.

[0019] 4. It is equipped with a PCB board with multiple sets of electrical plug holes. One side is electrically connected to the plug and the other side is electrically connected to the copper plate. By using the PCB board as a power transmission relay station, the device can be made without power cords. The cordless design can greatly increase the stability of the vehicle lights, prevent the wires from aging or loosening and desoldering due to vibration, and greatly improve the service life of the product. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is an exploded view of the structure of this utility model.

[0022] In the diagram: 1. Cooling fan; 2. Plastic lamp housing A; 3. Plastic lamp housing B; 4. Copper plate; 5. LED beads; 6. Heat pipe; 7. Aluminum heat sink; 8. PCB board; 9. Plug; 10. Fixing screws. Detailed Implementation

[0023] 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 protection scope of the present utility model.

[0024] Please see Figure 1-2 This utility model provides a technical solution:

[0025] An aftermarket LED car and motorcycle headlight includes a main housing, within which a fixing structure and LED beads 5 are installed. An active heat dissipation device is located on one side of the main housing, and a passive heat dissipation aluminum heat sink 7 is located at the rear of the main housing. A plug 9 is located on the side of the aluminum heat sink 7 facing away from the LED beads 5. The product is small in size, 1:1 in size with the original vehicle's halogen headlight, does not affect other vehicle components, and is easy to install and remove.

[0026] Furthermore, the main outer shell comprises plastic lamp housing A2 and plastic lamp housing B3, both of which are semi-circular strip structures. Plastic lamp housings A2 and B3 are assembled to form a cylindrical main outer shell. Plastic lamp housing B3 has multiple sets of internally threaded posts, and plastic lamp housing A2 has corresponding fixing holes. Plastic lamp housings A2 and B3 are fixedly connected by multiple sets of fixing screws 10. Both plastic lamp housings A2 and B3 are made of high-temperature resistant plastic material (PBT+30%GF) on both sides, exhibiting good high-temperature resistance. Post-processing of the parts is simple and convenient. Compared to all-metal materials, they are cheaper and do not require complex processes such as polishing, drilling, and grinding, significantly reducing costs.

[0027] Furthermore, the active cooling device is a disc-shaped cooling fan 1. The housing of the cooling fan 1 is snapped into the main housing, and the output direction of the cooling fan 1 faces inward towards the main housing. The output direction of the cooling fan 1 is crucial. If the direction is reversed, negative pressure will be generated on the front side of the main housing, and the airflow will be opposite to the designed airflow. The air that has undergone heat exchange at the aluminum heat sink 7 will flow back to the copper plate 4, increasing the temperature of the LED 5 and affecting its performance. The correct airflow ensures that the air first passes through the LED 5, and then flows to the aluminum heat sink 7 for heat exchange. After partial heat exchange between the air and the LED 5 and the copper plate 4, the slightly warmer air exchanges heat with the aluminum heat sink 7. This process will not affect the LED 5 and can prevent heat accumulation. In simple terms, the LED 5 will not consume the exhaust gas from the aluminum heat sink 7.

[0028] Furthermore, the fixing structure includes a copper plate 4, which has through holes corresponding to the internally threaded posts. The copper plate 4 is fixed between the plastic lamp housing A2 and the plastic lamp housing B3 by multiple sets of internally threaded posts. Multiple sets of LED beads 5 are fixedly installed on the copper plate 4. A connector is provided on the side of the copper plate 4 away from the cooling fan 1, and heat pipes 6 are provided on both sides of the copper plate 4 near the connector. The connector on the copper plate 4 also has an electrical interface that mates with the PCB board 8. The copper plate 4 passes through the aluminum heat sink 7 and is electrically connected to the PCB board 8.

[0029] Furthermore, the aluminum heat sink 7 is machined with multiple sets of heat dissipation fins. The center of the aluminum heat sink 7 has a connector corresponding to the plug, and circular insertion holes corresponding to the heat pipes 6 are located on both sides of the connector. The aluminum heat sink 7 is fitted onto the side of the copper plate 4 facing away from the cooling fan 1, with the connector inserted into the connector and the two sets of heat pipes 6 inserted into the circular insertion holes. The multiple sets of heat dissipation fins increase the contact area between the aluminum heat sink 7 and the air, improving heat exchange efficiency.

[0030] Furthermore, a PCB board 8 is installed between the aluminum heat sink 7 and the plug 9. The PCB board 8 contains a drive circuit and three sets of electrical connectors. The plug 9 has three sets of electrical pins, and the plug 9 and PCB board 8 are electrically connected via these pins. The plug 9 is 1:1 the size of the original vehicle part, allowing for plug-and-play functionality. The copper plate 4 passes through the aluminum heat sink 7 and is electrically connected to the PCB board 8. No power cord is required during the connection process; this wireless design significantly increases structural stability and extends service life.

[0031] Structural Description:

[0032] Cooling fan 1: It is disc-shaped, with the outer shell snapped into the main body shell. The output direction is towards the inside of the main body shell. When it runs, it promotes airflow to achieve active heat dissipation and ensure that the heat inside the lamp is dissipated in time.

[0033] Plastic lamp housing A2: It is a semi-circular strip structure, which is spliced ​​with plastic lamp housing B3 to form a cylindrical main body shell. It has fixing holes on the top that correspond to the internal threaded posts of plastic lamp housing B3. It is connected to plastic lamp housing B3 by fixing screws 10, which serves to protect and fix the internal components.

[0034] Plastic lamp housing B3: It also has a semi-circular strip structure with multiple sets of internal threaded columns. It is spliced ​​with plastic lamp housing A2 to form the main outer shell. It is fastened with fixing screws 10 to provide protection for the lamp and support the internal structure.

[0035] Copper plate 4: It has a through hole corresponding to the internal thread post and is fixed between the plastic lamp housing A2 and the plastic lamp housing B3. Multiple sets of lamp beads 5 are installed on it. There is a connector on the side away from the cooling fan 1. Heat pipes 6 are provided on both sides for fixing the lamp beads 5 and conducting electricity and heat.

[0036] LED 5: Fixed on copper plate 4, it emits light after receiving electrical energy, providing a light source for vehicle operation;

[0037] Heat pipe 6: Located on both sides of the copper plate 4 near the connector, it is inserted into the round socket of the aluminum heat sink 7 and can quickly conduct the heat of the copper plate 4 to the aluminum heat sink 7, thereby enhancing the heat dissipation efficiency.

[0038] Aluminum radiator 7: Located at the rear of the main body shell, with multiple sets of heat dissipation fins processed on the surface, a plug interface corresponding to the plug connector in the center, and circular plug holes corresponding to the heat pipe 6 on both sides. By cooperating with the heat pipe 6 and increasing the heat dissipation area, passive heat dissipation is achieved.

[0039] PCB board 8: placed between aluminum heat sink 7 and plug 9. The board integrates the drive circuit and has three sets of electrical connectors. It is connected to plug 9 through electrical pins to convert and regulate the vehicle's electrical energy to power the LED 5.

[0040] Plug 9: On the side of the aluminum radiator 7 away from the lamp bead 5, it is 1:1 in size with the original vehicle interface and has three sets of electrical pins for connecting to the vehicle power supply to deliver power to the lamp.

[0041] Fixing screw 10: used to pass through the fixing hole of plastic lamp housing A2 and engage with the internal thread post of plastic lamp housing B3, to firmly connect plastic lamp housing A2 and plastic lamp housing B3, making the main body shell structure stable.

[0042] Working Principle: The main housing of this aftermarket LED car and motorcycle headlight is composed of plastic lamp housing A2 and plastic lamp housing B3. Both plastic lamp housing A2 and plastic lamp housing B3 are semi-circular strip structures, which are spliced ​​together to form a cylindrical main housing. This structure not only provides a stable installation space for internal components such as the fixing structure, LED beads 5, active heat dissipation device, and passive heat dissipation aluminum heat sink 7, but also protects the internal components, preventing external dust, moisture, and other impurities from entering the lamp and affecting its normal operation. Plastic lamp housing A2 and plastic lamp housing B3 are made of high-temperature resistant plastic material on both sides, which has good high-temperature resistance and can withstand the heat generated during lamp operation. The parts are also easy to process afterward. Compared to all-metal materials, it is more affordable and avoids complex processes such as polishing, drilling, and grinding that are required in metal processing, greatly reducing production costs. Power transmission begins at plug 9. The plug 9 is designed to be 1:1 size with the original vehicle interface, enabling plug-and-play functionality and convenient and quick power access from the vehicle's power source. Plug 9 features three sets of electrical pins that precisely align with three sets of electrical connectors on the PCB board 8, achieving electrical connection. The PCB board 8 integrates a driver circuit, which is crucial for converting and regulating the electrical energy input from the vehicle, ensuring that the output power parameters meet the operating requirements of the LED chip 5 and providing suitable power for stable illumination. Power output from the PCB board 8 is transmitted to the copper plate 4 via a unique connection method. The copper plate 4 passes through the aluminum heat sink 7 and is electrically connected to the PCB board 8, eliminating the need for traditional power wires. The copper plate 4 has an electrical interface that mates with the PCB board 8, enabling efficient power transmission between the two. This wire-free design avoids issues such as wire aging and loosening due to vibration, significantly improving the stability of the entire lamp's power transmission structure and thus significantly extending the product's lifespan. The LED chip 5 is fixedly mounted on the copper plate 4. When the copper plate 4 receives electrical energy from the PCB board 8 after being regulated by the driving circuit, the semiconductor material inside the LED chip 5 undergoes recombination of electrons and holes under the influence of the electric field, thereby generating photons and realizing the conversion of electrical energy into light energy, emitting bright light to provide illumination for the vehicle. The active cooling device is mainly supported by a disc-shaped cooling fan 1. The housing of the cooling fan 1 is tightly fitted into the main housing, and its output direction is precisely directed towards the inside of the main housing. When the cooling fan 1 starts running, a powerful airflow is sent into the main housing. This cold air first blows directly onto the area where the LED chip 5 is located. The LED chip 5 generates a lot of heat during the light emission process, and the cold air can promptly remove some of the heat from the surface of the LED chip 5, providing an initial cooling effect. Then, the cold air continues to flow to the copper plate 4, further absorbing the heat energy accumulated on the copper plate 4 due to the conduction of heat from the LED chip 5. This orderly airflow path design ensures that the cold air can preferentially dissipate heat from the heat source LED chip 5, preventing the LED chip 5 from being affected by overheating, thus reducing its luminous efficiency and lifespan.After initial cooling via active heat dissipation, the slightly warm air continues to flow to the aluminum radiator 7. The aluminum radiator 7 is equipped with multiple sets of heat dissipation fins, which greatly increase the contact area between the radiator 7 and the air. When the hot air flows through the aluminum radiator 7, heat is transferred from the air to the radiator 7 via thermal conduction, and then dissipated into the surrounding environment via thermal convection, achieving efficient heat exchange between the air and the radiator 7. Furthermore, heat pipes 6 are located on both sides of the copper plate 4 near the connector, and heat from the copper plate 4 is conducted to the heat pipes 6. The heat pipes 6 have high thermal conductivity, quickly transferring heat to the aluminum radiator 7. The aluminum radiator 7 has a connector in the center corresponding to the connector, and circular insertion holes on both sides of the connector corresponding to the heat pipes 6. The heat pipes 6 are inserted into these circular insertion holes, ensuring smooth heat transfer from the copper plate 4 to the aluminum radiator 7. Throughout the heat dissipation process, the aluminum heat sink 7, working in conjunction with the active heat dissipation device, further reduces the internal temperature of the lamp, effectively preventing heat accumulation inside the lamp and ensuring that the lamp beads 5 and other components can operate stably in a suitable temperature environment.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A retrofit LED headlight for automobiles and motorcycles, characterized in that: It includes a main shell, a fixing structure and an LED bead (5) are provided inside the main shell, an active heat dissipation device is provided on one side of the main shell, and a passive heat dissipation aluminum radiator (7) is provided at the rear of the main shell. A plug (9) is provided on the side of the aluminum radiator (7) away from the LED bead (5).

2. The aftermarket LED headlight for automobiles and motorcycles according to claim 1, characterized in that: The main body shell includes a plastic lamp shell A (2) and a plastic lamp shell B (3). Both plastic lamp shell A (2) and plastic lamp shell B (3) are semi-circular strip structures. Plastic lamp shell A (2) and plastic lamp shell B (3) are spliced ​​together to form a cylindrical main body shell. Plastic lamp shell B (3) is provided with multiple sets of internal threaded posts. Plastic lamp shell A (2) is provided with fixing holes corresponding to the internal threaded posts. Plastic lamp shell A (2) and plastic lamp shell B (3) are fixedly connected by multiple sets of fixing screws (10).

3. The aftermarket LED headlight for automobiles and motorcycles according to claim 1, characterized in that: The active heat dissipation device is a disc-shaped cooling fan (1), the outer shell of the cooling fan (1) is snapped into the main body shell, and the output direction of the cooling fan (1) is towards the inside of the main body shell.

4. The aftermarket LED headlight for automobiles and motorcycles according to claim 3, characterized in that: The fixing structure includes a copper plate (4), which has through holes corresponding to the internal threaded posts. The copper plate (4) is fixed between the plastic lamp housing A (2) and the plastic lamp housing B (3) by multiple sets of internal threaded posts. Multiple sets of lamp beads (5) are fixedly installed on the copper plate (4). A connector is provided on the side of the copper plate (4) away from the heat dissipation fan (1). Heat pipes (6) are provided on both sides of the copper plate (4) near the connector.

5. The aftermarket LED headlight for automobiles and motorcycles according to claim 4, characterized in that: The aluminum radiator (7) is processed with multiple sets of heat dissipation fins. The aluminum radiator (7) has a plug interface corresponding to the plug connector in the center. The plug interface has circular plug holes corresponding to the heat pipes (6) on both sides. The aluminum radiator (7) is sleeved on the side of the copper plate (4) away from the cooling fan (1), and the plug connector is inserted into the plug interface. The two sets of heat pipes (6) are inserted into the circular plug holes.

6. The aftermarket LED headlight for automobiles and motorcycles according to claim 5, characterized in that: A PCB board (8) is provided between the aluminum heat sink (7) and the plug (9). A driving circuit is provided on the PCB board (8). Three sets of electrical plug holes are provided on the PCB board (8). Three sets of electrical pins are provided on the plug (9). The plug (9) and the PCB board (8) are electrically connected through the electrical pins.

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