A direct-current brushless motor with a fan blade
Patent Information
- Application Number
- CN202522300986.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-30
- Publication Date
- 2026-09-08
- Estimated Expiration
- 2035-10-30
AI Technical Summary
[0002]直流无刷电机是指无电刷和换向器(或集电环)的电机，其具有传统直流电机的优点，同时又取消了碳刷、滑环结构，因此被广泛应用在汽车、工具、工业工控、自动化以及航空航天等领域；现有的直流无刷电机为了增加散热性，直流无刷电机内具有风叶，在风叶进行工作时可对直流无刷电机内部吹动，从而带走直流无刷电机内部的热量，直流无刷电机在长期使用下，风叶会将外界的灰尘吸入并吹入直流无刷电机内，使得直流无刷电机会受到灰尘的影响，当直流无刷电机内部灰尘较多时，让直流无刷电机不能进行正常运作
当直流无刷电机工作时，转轴带动扇叶转动，随后外界的空气会从进风口进入，在通过第一滤板、吸水层与第二滤板，可将空气中灰尘和水分进行吸收，之后处理好的空气通过通风口进入风罩内，从而可对直流无刷电机内部进行散热处理，使得直流无刷电机在长期使用下，外界的灰尘不会进入直流无刷电机内部，使得直流无刷电机可进行长期运作，提高了直流无刷电机的使用寿命。
Smart Images
Figure CN224733542U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of brushless DC motor technology, and in particular to a brushless DC motor with fan blades. Background Technology
[0002] A brushless DC motor is a motor without brushes and a commutator (or slip rings). It retains the advantages of a traditional DC motor while eliminating the need for carbon brushes and slip rings, making it widely used in automobiles, tools, industrial control, automation, and aerospace. To improve heat dissipation, existing brushless DC motors incorporate fan blades. These blades blow air through the motor's interior to remove heat. However, over time, the fan blades can draw in and blow dust into the motor, causing it to become dusty. Excessive dust buildup can prevent the motor from operating properly. Utility Model Content
[0003] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a brushless DC motor with fan blades.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: The device includes a housing, a front cover, a rear cover, a rotating shaft, and fan blades. The front cover and the rear cover are respectively fixed to both ends of the housing. The rotating shaft rotatably connects the front cover and the rear cover. The fan blades are sleeved and fixed to one end of the rotating shaft and are located on one side of the rear cover. A wind shroud is provided on the outer side of the rear cover, and the fan blades are located inside the wind shroud. A ventilation opening is provided on the side wall of the wind shroud. A fixing cover is provided at one end of the wind shroud. An air inlet is provided on the side wall of the fixing cover. The air inlet and the ventilation opening are arranged correspondingly. A filter layer is provided inside the fixing cover.
[0005] Preferably, the filter layer includes a first filter plate and a second filter plate, the first filter plate and the second filter plate being placed from the outside to the inside, and the filter pores of the second filter plate being larger than the filter pores of the first filter plate.
[0006] Preferably, an absorbent layer is provided between the first filter plate and the second filter plate.
[0007] Preferably, one end of the fixed cover is provided with a plurality of fixing buckles evenly distributed around its circumference, the side wall of the wind cover is provided with a plurality of through holes evenly distributed, the fixing buckles pass through the through holes, the inside of the wind cover is provided with a fixing ring, the side wall of the fixing ring is provided with a plurality of fixing holes evenly distributed around its circumference, and the fixing buckles are fastened and fixed in the fixing holes.
[0008] Preferably, the side wall of the fixing buckle is provided with a limiting block, and the side wall of the fixing ring is provided with a limiting groove, and the limiting block is snapped and fixed in the limiting groove.
[0009] Preferably, one end of the shroud is provided with a locking ring, and one end of the housing is provided with an abutment ring on its peripheral sidewall, and the locking ring and the abutment ring are engaged with each other.
[0010] Preferably, the wind shield includes a first outer cover and a second outer cover, with one end of the first outer cover and the second outer cover being spliced and fixed together.
[0011] In summary, the beneficial technical effects of this application are as follows: When the brushless DC motor is working, the shaft drives the fan blades to rotate, and then outside air enters through the air inlet. After passing through the first filter plate, the water absorption layer, and the second filter plate, dust and moisture in the air are absorbed. The treated air then enters the fan shroud through the ventilation port, which dissipates heat from the inside of the brushless DC motor. This prevents external dust from entering the brushless DC motor during long-term use, allowing it to operate for extended periods and improving its lifespan. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of the brushless DC motor of this utility model; Figure 2 This is a cross-sectional schematic diagram of the brushless DC motor of this utility model; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 This is an exploded view of the wind shield and fixed cover of this utility model; Figure 5 This is an exploded view of the wind shield and fixed cover of this utility model from another perspective.
[0013] In the diagram: 1. Housing; 2. Front cover; 3. Rear cover; 4. Shaft; 5. Fan cover; 6. Fan blade; 7. Locking ring; 8. Abutment ring; 9. First outer cover; 10. Second outer cover; 11. Fixing cover; 12. Ventilation opening; 13. Air inlet; 14. Filter layer; 15. First filter plate; 16. Second filter plate; 17. Water-absorbing layer; 18. Fixing buckle; 19. Perforation; 20. Fixing ring; 21. Fixing hole; 22. Sliding hole; 23. Locking hole; 24. Limiting block; 25. Limiting groove. Detailed Implementation
[0014] The present invention will be further described below with reference to the accompanying drawings.
[0015] This application discloses a brushless DC motor with fan blades.
[0016] Reference Figure 1 and Figure 2 It includes a housing 1, a front cover 2, a rear cover 3, a rotating shaft 4, a fan cover 5, and a fan blade 6. The front cover 2 and the rear cover 3 are respectively fixed to the two ends of the housing 1 by bolts. The rotating shaft 4 is rotatably connected between the front cover 2 and the rear cover 3. The two ends of the rotating shaft 4 pass through the outer end faces of the front cover 2 and the rear cover 3, respectively. One end of the fan cover 5 is fitted onto the end of the housing 1 near the rear cover 3. The fan blade 6 is fitted and fixed to one end of the rotating shaft 4. The fan blade 6 is located inside the fan cover 5.
[0017] A locking ring 7 is integrally provided on the inner circumference of one end of the fan cover 5, and an abutment ring 8 is integrally provided on the outer circumference of the housing 1 near the rear cover 3. The side wall of the locking ring 7 abuts against the side wall of the abutment ring 8. Under the interaction of the locking ring 7 and the abutment ring 8, the fan cover 5 is fixed to the housing 1.
[0018] The wind cover 5 includes a first outer cover 9 and a second outer cover 10, which are vertically symmetrically placed and fixed with bolts. When it is necessary to disassemble the wind cover 5, the bolts between the first outer cover 9 and the second outer cover 10 can be easily removed, so that the first outer cover 9 and the second outer cover 10 can be removed from the housing 1.
[0019] Reference Figure 3 A fixed cover 11 is placed at the outer end of the fan shroud 5. Multiple ventilation openings 12 are provided on the outer end face of the fan shroud 5, and multiple air inlets 13 are provided on the outer end face of the fixed cover 11. The air inlets 13 correspond to the ventilation openings 12. A filter layer 14 is placed inside the fixed cover 11. The filter layer 14 includes a first filter plate 15 and a second filter plate 16, which are arranged from the outside to the inside relative to the fan shroud 5. The filter holes of the second filter plate 16 are larger than those of the first filter plate 15. A water-absorbing layer 17 is placed between the first filter plate 15 and the second filter plate 16. Outside air enters through the air inlets 13 and passes through the first filter plate 15, the water-absorbing layer 17, and the second filter plate 16, absorbing dust and moisture from the air. The treated air then enters the fan shroud 5 through the ventilation openings 12, thereby dissipating heat from the inside of the brushless DC motor and preventing external dust from entering the motor during long-term use.
[0020] Reference Figure 4 and Figure 5The fixed cover 11 has six fixed buckles 18 uniformly and integrally provided at one end. The longitudinal section of the fixed buckle 18 is "L" shaped. The outer end face of the wind cover 5 has a through hole 19 for the fixed buckle 18 to pass through. The wind cover 5 has a fixed ring 20 inside. The side wall of the fixed ring 20 has six fixed holes 21 uniformly provided around its circumference. The fixed hole 21 includes a sliding hole 22 and a locking hole 23. The sliding hole 22 and the locking hole 23 are interconnected. When the fixed cover 11 is installed on the wind cover 5, one end of the fixed buckle 18 can be inserted into the sliding hole 22. Then, the fixed ring 20 is rotated, and the fixed buckle 18 is embedded in the locking hole 23.
[0021] The side wall of the fixing buckle 18 is integrally provided with a limiting block 24, which is hemispherical. The side wall of the fixing ring 20 is provided with a limiting groove 25. When the fixing buckle 18 slides into the locking hole 23, the limiting block 24 is snapped and fixed in the limiting groove 25.
[0022] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.
Claims
1. A brushless DC motor with fan blades, comprising a housing (1), a front cover (2), a rear cover (3), a rotating shaft (4), and fan blades (6), wherein the front cover (2) and the rear cover (3) are respectively fixed to both ends of the housing (1), the rotating shaft (4) is rotatably connected between the front cover (2) and the rear cover (3), the fan blades (6) are sleeved and fixed to one end of the rotating shaft (4), and the fan blades (6) are located on one side of the rear cover (3), characterized in that: The back cover (3) is provided with a wind cover (5) on the outside. The fan blade (6) is located inside the wind cover (5). The side wall of the wind cover (5) is provided with a ventilation opening (12). One end of the wind cover (5) is provided with a fixed cover (11). The side wall of the fixed cover (11) is provided with an air inlet (13). The air inlet (13) and the ventilation opening (12) are arranged in a corresponding manner. The fixed cover (11) is provided with a filter layer (14).
2. The brushless DC motor with fan blades according to claim 1, characterized in that, The filter layer (14) includes a first filter plate (15) and a second filter plate (16), which are placed from the outside to the inside. The filter holes of the second filter plate (16) are larger than those of the first filter plate (15).
3. A brushless DC motor with fan blades according to claim 2, characterized in that, A water-absorbing layer (17) is provided between the first filter plate (15) and the second filter plate (16).
4. A brushless DC motor with fan blades according to claim 1, characterized in that, One end of the fixed cover (11) is provided with a plurality of fixed buckles (18) evenly distributed around its circumference. The side wall of the wind cover (5) is provided with a plurality of through holes (19) evenly distributed. The fixed buckles (18) pass through the through holes (19). The inside of the wind cover (5) is provided with a fixed ring (20). The side wall of the fixed ring (20) is provided with a plurality of fixed holes (21) evenly distributed around its circumference. The fixed buckles (18) are fastened and fixed in the fixed holes (21).
5. A brushless DC motor with fan blades according to claim 4, characterized in that, The side wall of the fixing buckle (18) is provided with a limiting block (24), and the side wall of the fixing ring (20) is provided with a limiting groove (25). The limiting block (24) is snapped and fixed in the limiting groove (25).
6. A brushless DC motor with fan blades according to claim 1, characterized in that, One end of the hood (5) is provided with a locking ring (7), and one end of the housing (1) is provided with an abutment ring (8). The locking ring (7) and the abutment ring (8) are engaged with each other.
7. A brushless DC motor with fan blades according to claim 1, characterized in that... The wind shield (5) includes a first outer cover (9) and a second outer cover (10), with one end of the first outer cover (9) and the second outer cover (10) being spliced and fixed together.