A dimmer motor for vehicle light adjustment

Abstract

The application relates to the technical field of automobile accessories, in particular to a dimmer motor for adjusting a vehicle lamp, which comprises a lower shell and an upper shell installed above the lower shell, a pin mechanism for being connected with a vehicle circuit is connected to the upper left side of the upper shell, a sealing limiting cover is sealingly fixed to the upper right side of the upper shell, a micro motor is installed to the upper left side of the lower shell, a protective shell is installed to the upper right side of the lower shell, a threaded sleeve is installed to pass through the inside of the protective shell, a transmission deceleration mechanism is connected to the outside of the threaded sleeve, a dimmer rod is threadedly connected to pass through the inside of the threaded sleeve, and a sealing bellows is installed between the upper outside of the dimmer rod and the sealing limiting cover. The dimmer motor for adjusting the vehicle lamp prolongs the service life of the sealing bellows, improves the sealing performance, avoids dust or water vapor from entering the inside of the upper shell to cause corrosion of a circuit board or rusting of the micro motor, and then does not affect the use of the whole dimmer motor.

Description

Technical Field

[0001] This invention relates to the technical field of automotive parts, specifically to a dimming motor for adjusting vehicle lights. Background Technology

[0002] The dimming motor is installed inside the car's headlight. It uses an internal motor to drive a screw, converting rotational motion into linear displacement to adjust the vertical beam height of the headlight. This prevents the light from shining too high and dazzling oncoming drivers, and also prevents the light from being too low and affecting forward visibility. It precisely adjusts the vertical beam angle, preventing the headlights from tilting upwards and causing glare or insufficient illumination of the ground. It is an important guarantee for nighttime driving safety. Therefore, the dimming motor is one of the core components of the electric vehicle lighting system. For example, the patent disclosed in the prior art with publication number "CN213322849U" is entitled "A Dimming Motor for Vehicles". It discloses that the dimming shaft includes a detachably connected ball head and shaft body. The ball head and shaft body can be connected by a snap-fit ​​method. The ball head is provided with multiple reinforcing ribs. The shaft body has a circumferentially extending limit ring on the side away from the ball head. Multiple heat-conducting plates are also arranged in a circumferential array between the limit ring and the ball head. The heat-conducting plates include straight plates and arc-shaped plates, and multiple straight plates and arc-shaped plates are intermittently arranged. Each heat-conducting plate is provided with multiple heat-conducting holes. The reinforcing ribs increase the structural strength of the ball head. The ball head and shaft body are detachably connected. Different ball heads can be selected according to the headlight model to increase the compatibility of the dimming motor. The limit ring prevents the dimming shaft from over-meshing with the transmission structure. The heat-conducting plates dissipate heat at the dimming shaft. A sealing structure is provided at the snap-fit ​​point between the dimming shaft and the upper and lower housings. The dimming shaft extends and compresses the sealing ring to ensure a tight seal at this point. The snap-fit ​​between the upper and lower housings achieves the purpose of sealing and protecting the dimming motor body.

[0003] In the existing dimming motors described above, the dimming shaft extends and contracts, squeezing the sealing ring to ensure a seal at the point where the dimming shaft passes through the upper housing. However, since only the sealing ring is used, the sealing structure is simple, and the long-term extension and contraction of the dimming shaft will cause wear on the sealing ring, making it prone to damage. This allows dust or moisture to enter the interior, leading to circuit board corrosion or motor rust, which in turn affects the use of the entire dimming motor. Therefore, we propose a dimming motor for vehicle headlight adjustment to solve the problems mentioned above. Summary of the Invention

[0004] The purpose of this invention is to provide a dimming motor for vehicle headlight adjustment, in order to solve the problem mentioned in the background art. In the current dimming motor, the existing dimming motor ensures the seal at the penetration point between the dimming shaft and the upper housing by extending and compressing the sealing ring. However, since only the sealing ring is used for sealing, the sealing structure is simple, and the long-term extension and contraction of the dimming shaft will cause wear to the sealing ring, which will easily lead to the sealing ring being damaged. This will allow dust or moisture to enter the interior, causing circuit board corrosion or motor rust, and thus affecting the use of the entire dimming motor.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a dimming motor for adjusting vehicle lights, comprising a lower housing and an upper housing mounted thereon, wherein a pin mechanism for connecting to the vehicle circuit is connected to the upper left side of the upper housing, a circuit board is mounted on the upper rear side of the lower housing, a potentiometer is mounted on the front side of the circuit board, a sealing limit cover is sealed and fixed to the upper right side of the upper housing, a micro motor is mounted on the upper left side of the lower housing, and a protective shell is mounted on the upper right side of the lower housing, a threaded sleeve is installed through the interior of the protective shell, a transmission reduction mechanism is connected to the outer side of the threaded sleeve, a dimming rod is threadedly connected through the interior of the threaded sleeve, and a sealing bellows is installed between the upper outer side of the dimming rod and the sealing limit cover.

[0006] Preferably, the transmission reduction mechanism includes a first transmission gear installed on the outside of the threaded sleeve inside the protective shell, and a transmission shaft rotatably installed inside the left side of the protective shell. A second transmission gear and a worm gear are installed sequentially from top to bottom on the outside of the transmission shaft. A worm is meshed with the front side of the worm gear. The left end of the worm passes through the left side of the protective shell and is connected to the output end of the micro motor through a coupling. The left end of the worm is rotatably sealed to the left side of the protective shell. The right side of the second transmission gear is meshed with the first transmission gear.

[0007] Preferably, the upper surface of the sealing limit cover and the upper surface of the corresponding upper housing below the sealing limit cover are both provided with through holes for the dimming rod to pass through. The top end of the dimming rod is threaded with a ball head, and a fixing plate is integrally installed on the outer side of the dimming rod below the ball head. A sealing bellows is sealed and fixedly installed on the bottom surface of the fixing plate. The bottom end of the sealing bellows is sealed and fixedly installed with the upper surface of the sealing limit cover through a flange and a sealing gasket.

[0008] Preferably, there is a gap between the inner side of the sealing bellows and the outer side of the dimming rod, and the maximum displacement of the sealing bellows when stretched is greater than the maximum displacement of the dimming rod when raised.

[0009] Preferably, the outer surface of the dimming rod is provided with a thread, and symmetrical limit grooves are formed on the outer surface of the dimming rod.

[0010] Preferably, limit blocks are symmetrically installed inside the sealing limit cover, the limit blocks are engaged and slidably connected with the limit groove, and the shortest distance between the two limit blocks is less than the maximum diameter of the dimming rod.

[0011] Preferably, both the potentiometer and the micro motor are electrically connected to the circuit board.

[0012] Preferably, a sleeve is fitted and connected to the lower outer side of the threaded sleeve, and the bottom end of the sleeve is fixedly installed inside the bottom surface of the protective shell. A temporary storage groove in the shape of a ring is opened inside the upper part of the sleeve. The inner sides of the sleeve above and below the temporary storage groove are connected to the outer side of the threaded sleeve through sealed bearings. A liquid outlet groove in the shape of a "Z" is opened at equal intervals inside the threaded sleeve. The lower end of the liquid outlet groove is connected to the space inside the temporary storage groove, and the upper end of the liquid outlet groove is connected to the hollow area inside the threaded sleeve.

[0013] Preferably, the lower inner diameter of the threaded sleeve is larger than the upper inner diameter of the threaded sleeve.

[0014] Preferably, an inlet pipe is installed through the right side of the sleeve, and the right end of the inlet pipe penetrates the right side of the protective shell and the upper shell. A first outlet pipe and a second outlet pipe are installed inside the left side of the sleeve. The right ends of the first outlet pipe and the second outlet pipe are connected to the space inside the temporary storage tank. The upper end of the first outlet pipe is located directly above the meshing point of the second transmission gear and the first transmission gear, and the second outlet pipe is located directly above the meshing point of the worm gear and the worm.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the dimming motor for vehicle headlight adjustment improves the service life of the sealed bellows and also improves the sealing performance, preventing dust or moisture from entering the interior of the upper housing and causing circuit board corrosion or micro motor rusting, thus not affecting the use of the entire dimming motor. The specific details are as follows: (1) The upper end of the sealing bellows is sealed and fixedly connected to the fixed plate, and the lower end of the sealing bellows is sealed and fixedly connected to the upper surface of the sealing limit cover. This not only seals the connection between the dimming rod and the upper housing, but also prevents friction damage to the sealing bellows. This improves the service life of the sealing bellows and the sealing performance, preventing dust or moisture from entering the interior of the upper housing and causing corrosion of the circuit board or rust of the micro motor, thus not affecting the use of the entire dimming motor. (2) The protective shell can be used to integrate and install the drive shaft, the second drive gear, the worm gear and the worm. At the same time, it can also protect the second drive gear, the worm gear and the worm, preventing external dust and moisture from entering the protective shell and affecting the use of the second drive gear, the worm gear and the worm. (3) The temporary storage tank opened in the sleeve can deliver lubricating oil to the first liquid outlet pipe, the second liquid outlet pipe and the liquid outlet tank, thereby facilitating the simultaneous lubrication of the meshing parts of the first transmission gear and the second transmission gear, the meshing parts of the worm gear and the worm, and the connection between the threaded sleeve and the dimming rod. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the main cross-sectional structure of the present invention; Figure 3 This is a schematic cross-sectional view of the sealed bellows structure of the present invention; Figure 4 This is a top sectional view of the connection between the sealing limit cover and the dimming rod of the present invention; Figure 5 This is a schematic cross-sectional view of the protective shell structure of the present invention; Figure 6 This is a schematic diagram of the rear view of the threaded sleeve structure of the present invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the sleeve of the present invention; Figure 8 This is a schematic cross-sectional view of the threaded sleeve structure of the present invention.

[0017] In the diagram: 1. Lower housing; 2. Upper housing; 3. Pin insertion mechanism; 4. Sealing limit cover; 41. Limiting block; 5. Dimming rod; 51. Fixing plate; 52. Ball head; 53. Limiting groove; 6. Sealing bellows; 7. Circuit board; 8. Potentiometer; 9. Micro motor; 10. Protective shell; 11. Threaded sleeve; 111. First transmission gear; 112. Liquid outlet tank; 12. Transmission shaft; 121. Second transmission gear; 122. Worm gear; 13. Worm; 14. Sleeve; 141. Liquid inlet pipe; 142. First liquid outlet pipe; 143. Second liquid outlet pipe; 144. Temporary storage tank. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-8 The present invention provides the following technical solution: Example 1: The dimming motor for vehicle headlight adjustment in this example not only improves sealing performance but also extends the service life of the sealing bellows 6. See attached diagram for the specific structure. Figures 1-6As shown, there is a lower housing 1 and an upper housing 2 mounted on top of it. A pin mechanism 3 for connecting to the vehicle circuit is connected to the upper left side of the upper housing 2. A circuit board 7 is mounted on the upper rear side of the lower housing 1. A potentiometer 8 is mounted on the front side of the circuit board 7. A sealing limit cover 4 is sealed and fixed to the upper right side of the upper housing 2. A micro motor 9 is mounted on the upper left side of the lower housing 1. A protective shell 10 is mounted on the upper right side of the lower housing 1. A threaded sleeve 11 is installed through the inside of the protective shell 10. A transmission reduction mechanism is connected to the outside of the threaded sleeve 11. A dimming rod 5 is threaded through the inside of the threaded sleeve 11. A sealing bellows 6 is installed between the upper outer side of the dimming rod 5 and the sealing limit cover 4.

[0020] The transmission reduction mechanism includes a first transmission gear 111 installed on the outside of the threaded sleeve 11 inside the protective housing 10, and a transmission shaft 12 rotatably installed inside the left side of the protective housing 10. A second transmission gear 121 and a worm gear 122 are installed sequentially from top to bottom on the outside of the transmission shaft 12. A worm 13 is meshed with the front side of the worm gear 122. The left end of the worm 13 passes through the left side of the protective housing 10 and is connected to the output end of the micro motor 9 through a coupling. The left end of the worm 13 is sealed and rotatably installed with the left side of the protective housing 10. The right side of the second transmission gear 121 is meshed with the first transmission gear 111.

[0021] Both the upper surface of the sealing limit cover 4 and the upper surface of the corresponding upper housing 2 below the sealing limit cover 4 have through holes for the dimmer rod 5 to pass through. The top of the dimmer rod 5 is threaded with a ball head 52. A fixing plate 51 is integrally installed on the outer side of the dimmer rod 5 below the ball head 52. A sealing bellows 6 is sealed and fixedly installed on the bottom surface of the fixing plate 51. The bottom end of the sealing bellows 6 is sealed and fixedly installed to the upper surface of the sealing limit cover 4 via a flange and a sealing gasket. The inner side of the sealing bellows 6... There is a gap between the dimming rod 5 and the outside of the dimming rod 5. The maximum displacement of the sealed bellows 6 when stretched is greater than the maximum displacement of the dimming rod 5 when raised. The outer side of the dimming rod 5 is provided with a thread, and the outer side of the dimming rod 5 is symmetrically provided with limit grooves 53. Limit blocks 41 are symmetrically installed inside the sealed limit cover 4. The limit blocks 41 are engaged and slidably connected with the limit grooves 53. The shortest distance between the two limit blocks 41 is less than the maximum diameter of the dimming rod 5. The potentiometer 8 and the micro motor 9 are both electrically connected to the circuit board 7.

[0022] First, the ball joint 52 is connected to the headlight reflector or lamp holder bracket, and then the entire dimming motor can be used. When the trunk is full, the vehicle travels over bumpy roads, or experiences prolonged vibration, the vehicle's posture changes, causing the headlight's originally adjusted angle to shift. Either the light shines too close, obscuring the road, or it shines too far, blinding oncoming drivers. At this point, the driver sends an adjustment signal to the electronic control unit (ECU) by operating buttons on the steering wheel or dashboard. The ECU is the core control component of the dimming motor, responsible for receiving operation signals from sensors and the driver, calculating the optimal dimming angle, and outputting a control signal to the micro motor 9. The micro motor 9 then rotates forward or backward. The output of the micro motor 9 is connected via... The coupling drives the worm gear 13 to rotate, which in turn drives the worm wheel 122, the drive shaft 12, and the second drive gear 121 to rotate. The second drive gear 121 drives the first drive gear 111 and the threaded sleeve 11 to rotate at a reduced speed. Since the limiting block 41 is engaged and slidably connected to the limiting groove 53, the rotation of the threaded sleeve 11 drives the internally threaded dimming rod 5 to rise or fall. The dimming rod 5 drives the ball head 52 to rise or fall, thereby allowing the ball head 52 to push or pull the headlight reflector or lamp holder bracket, facilitating the adjustment of the angle of the headlight reflector or lamp holder bracket, so that the headlight can meet different illumination needs. Since this part is existing technology, it will not be described in detail here.

[0023] When the dimmer lever 5 rises, the fixing plate 51 on the outside of the dimmer lever 5 pulls the upper end of the sealing bellows 6, causing the sealing bellows 6 to be stretched. Therefore, the sealing bellows 6, which is fitted on the outside of the dimmer lever 5, replaces the traditional sealing ring, allowing the sealing bellows 6 to seal the outside of the dimmer lever 5. This prevents dust or moisture from entering the interior of the upper housing 2, which could cause corrosion of the circuit board 7 or rust of the micro motor 9, and thus will not affect the use of the entire dimmer motor. Moreover, during use, the sealing bellows 6 is stretched or compressed within a reasonable range, and the sealing bellows 6 does not come into contact with the dimmer lever 5 to generate friction, thus preventing friction damage to the sealing bellows 6, improving the service life of the sealing bellows 6, and also improving the sealing performance.

[0024] Meanwhile, the protective housing 10 allows for the integrated installation of the drive shaft 12, the second drive gear 121, the worm gear 122, and the worm 13, improving installation efficiency. It also protects the second drive gear 121, the worm gear 122, and the worm 13 from external dust and moisture entering the protective housing 10 and affecting their service life.

[0025] Example 2: The dimming motor for vehicle headlight adjustment in this example, based on Example 1, facilitates simultaneous lubrication of the meshing points of the first transmission gear 111 and the second transmission gear 121, the meshing points of the worm gear 122 and the worm 13, and the connection point between the threaded sleeve 11 and the dimming rod 5. For the specific structure, please refer to the attached diagram. Figures 5-8 As shown, a sleeve 14 is fitted and connected to the lower outer side of the threaded sleeve 11, and the bottom end of the sleeve 14 is fixedly installed inside the bottom surface of the protective shell 10. A temporary storage groove 144 in the shape of a ring is opened inside the upper part of the sleeve 14. The inner sides of the sleeve 14 above and below the temporary storage groove 144 are connected to the outer side of the threaded sleeve 11 through sealed bearings. The threaded sleeve 11 has liquid outlet grooves 112 in a "Z" shape structure opened at equal intervals inside. The lower end of the liquid outlet groove 112 is connected to the space inside the temporary storage groove 144, and the upper end of the liquid outlet groove 112 is connected to the hollow area inside the threaded sleeve 11. The lower inner diameter of sleeve 1 is larger than the upper inner diameter of sleeve 11. A liquid inlet pipe 141 is installed through the right side of sleeve 14, and the right end of liquid inlet pipe 141 penetrates the right side of protective shell 10 and upper shell 2. A first liquid outlet pipe 142 and a second liquid outlet pipe 143 are installed inside the left side of sleeve 14. The right ends of the first liquid outlet pipe 142 and the second liquid outlet pipe 143 are connected to the space inside the temporary storage tank 144. The upper end of the first liquid outlet pipe 142 is located directly above the meshing point of the second transmission gear 121 and the first transmission gear 111, and the second liquid outlet pipe 143 is located directly above the meshing point of the worm gear 122 and the worm 13.

[0026] When regular lubrication is required, the external conveying mechanism is activated, which delivers lubricating oil through the inlet pipe 141 to the annular temporary storage tank 144. At this time, the lubricating oil in the temporary storage tank 144 flows into the first outlet pipe 142, the second outlet pipe 143, and the outlet groove 112. The first outlet pipe 142 sprays lubricating oil onto the meshing point of the worm gear 122 and the worm 13, and the second outlet pipe 143 sprays lubricating oil onto the meshing point of the first transmission gear 111 and the second transmission gear 121. The Z-shaped outlet groove 112 delivers lubricating oil to the connection point of the threaded sleeve 11 and the dimming rod 5. This facilitates simultaneous lubrication of the meshing points of the first transmission gear 111 and the second transmission gear 121, the meshing point of the worm gear 122 and the worm 13, and the connection point of the threaded sleeve 11 and the dimming rod 5, ensuring the proper functioning of the transmission structure within the dimming motor.

[0027] Example 3: In this example, the dimming motor for adjusting vehicle lights can be designed as a double-layer or multi-layer composite structure based on Example 1. Even if one layer of the sealing bellows 6 is damaged, the other layer of the sealing bellows 6 can still perform the sealing operation. This avoids the single-layer sealing bellows 6 from developing fatigue cracks locally due to long-term high-frequency expansion and contraction, which would affect the sealing operation.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dimming motor for adjusting vehicle lights, comprising a lower housing (1) and an upper housing (2) mounted thereon, wherein a pin mechanism (3) for connecting to a vehicle electrical circuit is connected to the upper left side of the upper housing (2), a circuit board (7) is mounted on the upper rear side of the lower housing (1), and a potentiometer (8) is mounted on the front side of the circuit board (7), characterized in that: A sealing limit cover (4) is sealed and fixed on the upper right side of the upper housing (2). A micro motor (9) is installed on the upper left side of the lower housing (1). A protective shell (10) is installed on the upper right side of the lower housing (1). A threaded sleeve (11) is installed through the inside of the protective shell (10). A transmission reduction mechanism is connected to the outside of the threaded sleeve (11). A dimming rod (5) is threaded through the inside of the threaded sleeve (11). A sealing bellows (6) is installed between the upper outer side of the dimming rod (5) and the sealing limit cover (4).

2. A dimming motor for vehicle headlight adjustment according to claim 1, characterized in that: The transmission reduction mechanism includes a first transmission gear (111) installed on the outside of the threaded sleeve (11) inside the protective shell (10), and a transmission shaft (12) is rotatably installed inside the left side of the protective shell (10). A second transmission gear (121) and a worm gear (122) are installed sequentially from top to bottom on the outside of the transmission shaft (12). A worm (13) is meshed with the front side of the worm gear (122). The left end of the worm (13) passes through the left side of the protective shell (10) and is connected to the output end of the micro motor (9) through a coupling. The left end of the worm (13) is sealed and rotatably installed with the left side of the protective shell (10). The right side of the second transmission gear (121) is meshed with the first transmission gear (111).

3. A dimming motor for vehicle headlight adjustment according to claim 1, characterized in that: The upper surface of the sealing limit cover (4) and the upper surface of the corresponding upper shell (2) below the sealing limit cover (4) are both provided with through holes for the dimming rod (5) to pass through. The top end of the dimming rod (5) is threaded with a ball head (52). A fixing plate (51) is integrally installed on the outer side of the dimming rod (5) below the ball head (52). A sealing bellows (6) is sealed and fixedly installed on the bottom surface of the fixing plate (51). The bottom end of the sealing bellows (6) is sealed and fixedly installed with the upper surface of the sealing limit cover (4) through a flange and a sealing gasket.

4. A dimming motor for vehicle headlight adjustment according to claim 1, characterized in that: There is a gap between the inner side of the sealed bellows (6) and the outer side of the dimming rod (5), and the maximum displacement of the sealed bellows (6) being stretched is greater than the maximum displacement of the dimming rod (5) rising.

5. A dimming motor for vehicle headlight adjustment according to claim 1, characterized in that: The outer side of the dimming rod (5) is provided with a thread, and the outer side of the dimming rod (5) is symmetrically provided with limit grooves (53).

6. A dimming motor for vehicle headlight adjustment according to claim 5, characterized in that: The sealing limit cover (4) is symmetrically equipped with limit blocks (41), the limit blocks (41) are engaged and slidably connected with the limit groove (53), and the shortest distance between the two limit blocks (41) is less than the maximum diameter of the dimming rod (5).

7. A dimming motor for vehicle headlight adjustment according to claim 1, characterized in that: The potentiometer (8) and the micro motor (9) are both electrically connected to the circuit board (7).

8. A dimming motor for vehicle headlight adjustment according to claim 1, characterized in that: A sleeve (14) is fitted and connected to the lower outer side of the threaded sleeve (11), and the bottom end of the sleeve (14) is fixedly installed inside the bottom surface of the protective shell (10). A temporary storage groove (144) in the shape of a ring is opened inside the upper part of the sleeve (14). The inner sides of the sleeve (14) above and below the temporary storage groove (144) are connected to the outer side of the threaded sleeve (11) through a sealed bearing. A liquid outlet groove (112) in the shape of a "Z" is opened at equal intervals inside the threaded sleeve (11). The lower end of the liquid outlet groove (112) is connected to the space inside the temporary storage groove (144), and the upper end of the liquid outlet groove (112) is connected to the hollow area inside the threaded sleeve (11).

9. A dimming motor for vehicle headlight adjustment according to claim 8, characterized in that: The lower inner diameter of the threaded sleeve (11) is larger than the upper inner diameter of the threaded sleeve (11).

10. A dimming motor for vehicle headlight adjustment according to claim 8, characterized in that: The right side of the sleeve (14) is provided with an inlet pipe (141), and the right end of the inlet pipe (141) passes through the right side of the protective shell (10) and the upper shell (2). The left side of the sleeve (14) is provided with a first outlet pipe (142) and a second outlet pipe (143). The right ends of the first outlet pipe (142) and the second outlet pipe (143) are connected to the space inside the temporary storage tank (144). The upper end of the first outlet pipe (142) is located directly above the meshing point of the second transmission gear (121) and the first transmission gear (111), and the second outlet pipe (143) is located directly above the meshing point of the worm gear (122) and the worm (13).

Images