LED car lamp cooling fan

Abstract

The LED car lamp cooling fan comprises a hollow outer frame, a supporting plate is arranged at the bottom of the outer frame, a fixing column is arranged on the supporting plate, a driving shaft is rotationally installed in the fixing column, one end of the driving shaft is inserted into the fixing column in a penetrating mode, and a wind wheel is fixedly installed at the other end of the driving shaft. A fixing hole is formed in the fixing column, the fixing hole is a blind hole, a fluid dynamic bearing is fixedly installed in the fixing hole, and the driving shaft is fixedly installed on the fluid dynamic bearing; lubricating oil is arranged in the fixing hole so that the fluid dynamic bearing can be soaked in the lubricating oil. Due to the fact that lubricating oil in the fixing hole can be concentrated in the bearing in the using process of the fluid dynamic bearing, leakage is not prone to occurring. Therefore, lubricating oil is arranged in the fixing hole, and supply of the lubricating oil is guaranteed constantly. The service life of the fan is further prolonged, the noise reduction effect of the fan in the operation process can be further enhanced, and the fan is more quiet.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted lamp heat dissipation equipment, in particular to a LED vehicle lamp heat dissipation fan. Background Art

[0002] Existing cooling fans are divided into two types: ball fans and hydraulic fans. Since ball fans are more efficient than hydraulic fans and rotate more smoothly, they are used in a wider range. When installing ball bearings, lubricating oil is added to the balls in the ball bearings so that the ball bearings are saturated with lubricating oil in the initial state. However, during the long-term use of ball bearings, the steel balls in the ball bearings and the inner and outer rings of the ball bearings are made of metal. When the lubricating oil in the ball bearings is gradually consumed, friction sounds will be emitted between the steel balls and the inner and outer rings, and the friction loss between the steel balls and the inner and outer rings will also be accelerated. This will cause the rotation stability of the cooling fan to decrease. Utility Model Content

[0003] The utility model aims to provide a cooling fan for an LED vehicle lamp, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an LED car light cooling fan, comprising a hollow outer frame, a support plate is arranged at the bottom of the outer frame, a fixing column is arranged on the support plate, a driving shaft is rotatably installed in the fixing column, one end of the driving shaft is inserted in the fixing column, and a wind wheel is fixedly installed on the other end of the driving shaft; a fixing hole is arranged on the fixing column, the fixing hole is a blind hole, a fluid dynamic bearing is fixedly installed in the fixing hole, and the driving shaft is fixedly installed on the fluid dynamic bearing; lubricating oil is arranged in the fixing hole so that the fluid dynamic bearing is immersed in the lubricating oil.

[0005] Compared with the prior art, since the fluid dynamic bearing can concentrate the lubricating oil in the fixed hole inside the bearing, it is not easy to leak; therefore, lubricating oil is arranged in the fixed hole to ensure the supply of lubricating oil at all times; the service life of the fan is further improved, and the noise reduction effect of the fan during operation can be further enhanced, making the fan quieter.

[0006] As an improvement of the LED car light cooling fan of the utility model, a sealing ring is fixedly installed on the driving shaft, a fixing ring is fixedly installed at the opening of the fixing hole, the fixing ring is sleeved on the driving shaft, a V-shaped groove is provided between the bottom of the fixing ring and the sealing ring; an adaptable sealing ring is provided in the V-shaped groove; the sealing ring is elastically connected in the fixing ring; under normal conditions, the sealing ring is clamped in the V-shaped groove to seal the lubricating oil in the fixing hole.

[0007] Compared with the prior art, since the fluid dynamic bearing can concentrate the lubricating oil inside the bearing during use, when the fluid dynamic bearing stops working, the lubricating oil inside the bearing will be retained in the fixing hole. Therefore, a fixing ring is arranged in the fixing hole, and a sealing ring is fixed on the driving shaft at the same time. The lubricating oil is sealed by the cooperation of the fixing ring and the sealing ring, so that the lubricating oil flowing out of the fluid dynamic bearing flows out from the opening of the fixing part, thereby avoiding the phenomenon of oil leakage.

[0008] As an improvement of the LED car light cooling fan of the utility model, the fixing ring includes a cylindrical connecting section 15 fixedly connected to the side wall of the fixing hole, an upper retaining ring is provided at one end of the connecting section 15, and a lower retaining ring is provided at the other end. The upper retaining ring is provided with a through hole adapted to the drive shaft, and a V-shaped groove is located between the lower retaining ring and the sealing ring.

[0009] As an improvement of the LED car light cooling fan of the utility model, a plurality of connecting columns extending upward toward the baffle ring are evenly distributed on the surface of the sealing ring, and mounting columns corresponding to the connecting columns are arranged on the baffle plate, and the mounting columns are elastically connected to the connecting columns; under normal conditions, the sealing ring is clamped in the V-shaped groove to seal the lubricating oil in the fixing hole.

[0010] As an improvement of the LED car light cooling fan of the utility model, a resist column is arranged on the top of the connecting column; a connecting hole adapted to the resist column and a sliding hole adapted to the connecting column are arranged on the mounting column; a resist plate is fixedly installed at the opening of the connecting hole; a spring is arranged between the resist plate and the resist column, one end of the spring abuts against the connecting column, and the other end abuts against the resist plate.

[0011] As an improvement of the LED headlight cooling fan of the utility model, an inner sealing surface is obliquely provided on the outer edge of the sealing ring; an outer sealing surface is obliquely provided on the edge of the lower retaining ring 17, and the inner sealing surface and the outer sealing surface form the above-mentioned V-shaped groove.

[0012] As an improvement of the LED car light cooling fan of the utility model, a left bevel and a right bevel are symmetrically arranged on the sealing ring; during use, the left bevel abuts against the outer sealing surface; the right bevel abuts against the inner sealing surface.

[0013] As an improvement of the LED car lamp cooling fan of the utility model, a ceramic layer is sleeved on the surfaces of the inner sealing surface, the outer sealing surface, the left inclined surface and the right inclined surface.

[0014] As an improvement of the LED car light cooling fan of the utility model, a plurality of connecting rods are evenly distributed between the support plate and the outer frame, one end of the connecting rod is integrally formed and fixedly connected to the outer frame; the other end of the connecting rod is integrally formed and fixedly connected to the support plate.

[0015] As an improvement of the LED car light cooling fan of the utility model, a permanent magnet ring is arranged inside the wind wheel; a stator winding is fixedly installed on the fixing column; the permanent magnet ring is sleeved on the stator winding; the cooperation of the stator winding and the permanent magnet ring drives the wind wheel to rotate.

[0016] In addition to the technical problems solved by the present invention, the technical features that constitute the technical solution, and the advantages brought by the technical features of the technical solution described above, other technical problems that can be solved by the present invention, other technical features included in the technical solution, and the advantages brought by these technical features will be further described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an exploded sectional view of the utility model.

[0018] Figure 2 It is an enlarged view of point A of the first installation method of the utility model.

[0019] Explanation of the accompanying drawings: 01. Outer frame, 02. Support plate, 03. Connecting rod, 04. Fixed column, 05. Driving shaft, 06. Wind wheel, 07. Fan blade, 08. Fixed hole, 09. Fluid dynamic bearing, 10. Sealing ring, 11. Fixed ring, 12. V-shaped groove, 13. Connecting column, 14. Baffle column, 15. Connecting section, 16. Upper baffle ring, 17. Lower baffle ring, 18. Extension column, 19. Mounting column, 20. Baffle plate, 21. Spring, 22. Connecting ring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] like Figure 1-2 As shown, a cooling fan for an LED headlight of the utility model comprises a hollow outer frame 01, the outer circumference of which is adapted to the mounting position on the LED roof. A support plate 02 is provided at the bottom of the outer frame 01, and the axis of the support plate 02 is coaxially arranged with the axis of the outer frame 01. The support plate 02 and the outer frame 01 are fixedly connected by a plurality of connecting rods 03. The plurality of connecting rods 03 are evenly distributed between the support plate 02 and the outer frame 01. A card slot is provided on one of the connecting rods 03, and the card slot is used to place a wire for realizing electrical connection of the cooling fan.

[0022] One end of the connecting rod 03 is integrally formed and fixedly connected to the outer frame 01. The other end of the connecting rod 03 is integrally formed and fixedly connected to the support plate 02. A ventilation hole that is connected to the installation chamber is provided between two adjacent connecting rods 03.

[0023] A fixed column 04 is integrally formed on the support plate 02, and a driving shaft 05 is rotatably installed in the fixed column 04. One end of the driving shaft 05 is inserted into the fixed column 04 and rotatably connected to the fixed column 04, and the other end of the driving shaft 05 is located outside the fixed column 04 and fixedly installed with a wind wheel 06.

[0024] The fixing column 04 is provided with a fixing hole 08, which is a blind hole. A fluid dynamic bearing 09 is fixedly installed in the fixing hole 08, and the drive shaft 05 is fixedly installed on the fluid dynamic bearing 09. Lubricating oil is provided in the fixing hole 08 so that the fluid dynamic bearing 09 is immersed in the lubricating oil. The fluid dynamic bearing 09 is a standard part purchased from outside. Since the fluid dynamic bearing 09 is provided with micro grooves, the fluid mechanics characteristics of the micro grooves are used to fill the gap between the shaft and the bearing with lubricant. The surface of the bearing is engraved with a herringbone groove. When the main shaft rotates, the fluid pressure increases, and the lubricant can be concentrated inside the bearing, which is not easy to leak. At the same time, a certain amount of lubricating oil is sealed in the fixing hole 08, so as to ensure the supply of lubricating oil at all times. This further improves the service life of the fan, and can further enhance the noise reduction effect of the fan during operation, making the fan quieter.

[0025] A sealing ring 10 is fixedly installed on the driving shaft 05, and a fixing ring 11 is fixedly installed at the opening of the fixing hole 08. The fixing ring 11 is sleeved on the driving shaft 05, and a V-shaped groove 12 is provided between the bottom of the fixing ring 11 and the sealing ring 10. An adapted sealing ring 10 is provided in the V-shaped groove 12. The sealing ring 10 is elastically connected in the fixing ring 11.

[0026] During the assembly process, the fluid dynamic bearing 09 is first fixed on the drive shaft 05, and then the combination of the fluid dynamic bearing 09 and the drive shaft 05 is installed in the fixing hole 08. Lubricating oil is added to the fixing hole 08, and then the sealing ring 10 is fixed on the drive shaft 05. During the installation of the fixing ring 11, it is necessary to ensure that the lower end surface of the fixing ring 11 is flush with the lower end surface of the sealing ring 10 and is on the same plane. Then the fixing ring 11 is installed at the opening of the fixing hole 08 and sleeved on the drive shaft 05. Under normal conditions, the sealing ring 10 is clamped in the V-shaped groove 12 to seal the lubricating oil in the fixing hole 08.

[0027] The fixing ring 11 includes a cylindrical connecting section 15 fixedly connected to the side wall of the fixing hole 08, an upper retaining ring 16 is provided at one end of the connecting section 15, and a lower retaining ring 17 is provided at the other end. The upper retaining ring 16 is provided with a through hole adapted to the drive shaft 05, so that the upper retaining ring 16 is sleeved on the drive shaft 05. When the drive shaft 05 can rotate freely in the through hole. The V-shaped groove 12 is located between the lower retaining ring 17 and the sealing ring 10.

[0028] The surface of the sealing ring 10 is evenly distributed with a number of connecting columns 13 extending toward the upper retaining ring 16. The connecting columns 13 and the sealing ring 10 can be fixedly connected by fasteners or by integral molding. A retaining column 14 is provided on the top of the connecting column 13. The retaining column 14 and the connecting column 13 are fixedly connected by fasteners or by integral molding. The upper retaining ring 16 is provided with a mounting column 19 corresponding to the connecting column 13, and the mounting column 19 extends toward the lower retaining ring 17. The mounting column 19 and the upper retaining ring 16 are fixedly connected by integral molding. The mounting column 19 is provided with a connecting hole adapted to the retaining column 14 and a sliding hole adapted to the connecting column 13. The retaining column 14 is located in the connecting hole, and the connecting column 13 is located in the sliding hole. The connecting column 13 can slide up and down along the sliding hole on the fixing column. A retaining plate 20 is fixedly installed at the opening of the connecting hole by fasteners. A spring 21 is provided between the retaining plate 20 and the retaining column 14, one end of the spring 21 abuts against the connecting column 13, and the other end abuts against the retaining plate 20. The design of the spring 21 enables the sealing ring 10 to be located at the distal end of the upper retaining ring 16 in a normal state.

[0029] When the fixing ring 11 is fixed in the fixing hole 08 and the sealing ring 10 is fixed on the driving shaft 05, the sealing ring 10 is always clamped in the V-shaped groove 12 under the action of the spring 21 to seal the lubricating oil in the fixing hole 08.

[0030] An inner sealing surface is obliquely arranged on the outer edge of the sealing ring 10. An outer sealing surface is obliquely arranged on the edge of the lower retaining ring 17, and the inner sealing surface and the outer sealing surface form the V-shaped groove 12.

[0031] The sealing ring 10 is symmetrically provided with a left bevel and a right bevel. During use, the left bevel abuts against the outer sealing surface, and the right bevel abuts against the inner sealing surface.

[0032] It should be noted that the inner sealing surface, the outer sealing surface, the left inclined surface and the right inclined surface are all covered with a ceramic layer. The ceramic layer has good wear resistance and can withstand high-speed rotation. At the same time, the design of the spring 21 makes the sealing ring 10 and the V-shaped groove 12 tightly connected together to form a good sealing effect.

[0033] like Figure 1As shown, the wind wheel 06 includes a circular connecting plate 16 and a connecting ring 22 integrally formed with the connecting plate 16, and a plurality of blades 07 are integrally formed on the outer surface of the wind wheel 06. The blades 07 are located between the connecting ring 22 and the outer frame 01. An extension column 18 coaxially arranged with the connecting ring 22 is arranged at the center of the connecting plate 16, and the drive shaft 05 is fixedly connected to the extension column 18, and a fixed chamber is arranged between the connecting ring 22 and the extension column 18. A permanent magnet ring is arranged in the fixed chamber. The permanent magnet ring and the fixed chamber are fixedly connected in a matching manner. A stator winding is fixedly mounted on the fixed column 04. The permanent magnet ring is sleeved on the stator winding. The wind wheel 06 rotates by the cooperation of the stator winding and the permanent magnet ring.

[0034] It should be noted that, for the sake of clarity of description, the fasteners described in this application are any one of screws, bolts, and screws.

[0035] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0036] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. An LED headlight cooling fan, comprising a hollow outer frame, a support plate is provided at the bottom of the outer frame, a fixing column is provided on the support plate, a driving shaft is rotatably installed in the fixing column, one end of the driving shaft is inserted in the fixing column, and a wind wheel is fixedly installed at the other end of the driving shaft, characterized in that: The fixing column is provided with a fixing hole which is a blind hole, in which a fluid dynamic bearing is fixedly installed, and the driving shaft is fixedly installed on the fluid dynamic bearing; lubricating oil is provided in the fixing hole so that the fluid dynamic bearing is immersed in the lubricating oil.

2. The LED car light cooling fan according to claim 1, characterized in that: A sealing ring is fixedly installed on the driving shaft, a fixing ring is fixedly installed at the opening of the fixing hole, the fixing ring is sleeved on the driving shaft, a V-shaped groove is arranged between the bottom of the fixing ring and the sealing ring; an adaptable sealing ring is arranged in the V-shaped groove; the sealing ring is elastically connected in the fixing ring; under normal conditions, the sealing ring is clamped in the V-shaped groove to seal the lubricating oil in the fixing hole.

3. The LED car light cooling fan according to claim 2, characterized in that: The fixing ring includes a cylindrical connecting section fixedly connected to the side wall of the fixing hole, an upper retaining ring is arranged at one end of the connecting section, and a lower retaining ring is arranged at the other end. The upper retaining ring is provided with a through hole adapted to the drive shaft, and a V-shaped groove is located between the lower retaining ring and the sealing ring.

4. The LED car light cooling fan according to claim 3, characterized in that: There are several connecting columns evenly distributed on the surface of the sealing ring, extending upward toward the baffle ring. Mounting columns corresponding to the connecting columns are arranged on the baffle plate, and the mounting columns are elastically connected to the connecting columns. Under normal conditions, the sealing ring is clamped in the V-shaped groove to seal the lubricating oil in the fixing hole.

5. The LED car light cooling fan according to claim 4, characterized in that: A stop column is arranged on the top of the connecting column; a connecting hole adapted to the stop column and a sliding hole adapted to the connecting column are arranged on the mounting column; a stop plate is fixedly installed at the opening of the connecting hole; a spring is arranged between the stop plate and the stop column, one end of the spring abuts against the connecting column, and the other end abuts against the stop plate.

6. The LED car light cooling fan according to claim 5, characterized in that: An inner sealing surface is obliquely arranged on the outer edge of the sealing ring; an outer sealing surface is obliquely arranged on the edge of the lower retaining ring, and the inner sealing surface and the outer sealing surface form the above-mentioned V-shaped groove.

7. The LED car light cooling fan according to claim 6, characterized in that: The sealing ring is symmetrically provided with a left bevel and a right bevel; during use, the left bevel abuts against the outer sealing surface; and the right bevel abuts against the inner sealing surface.

8. The LED car light cooling fan according to claim 7, characterized in that: The surfaces of the inner sealing surface, the outer sealing surface, the left inclined surface and the right inclined surface are all sleeved with a ceramic layer.

9. The LED car light cooling fan according to claim 1, characterized in that: A plurality of connecting rods are evenly distributed between the support plate and the outer frame, one end of the connecting rod is integrally formed and fixedly connected with the outer frame; the other end of the connecting rod is integrally formed and fixedly connected with the support plate.

10. The LED car light cooling fan according to claim 2, characterized in that: A permanent magnet ring is arranged inside the wind wheel; a stator winding is fixedly installed on the fixing column; the permanent magnet ring is sleeved on the stator winding; the cooperation between the stator winding and the permanent magnet ring drives the wind wheel to rotate.

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