Brushless motor
By designing dustproof components and cooling fan blades in the brushless motor, the problem of dust entering the heat dissipation holes is solved, achieving stable operation and efficient heat dissipation of the motor.
Patent Information
- Application Number
- CN202422902477.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-11-27
AI Technical Summary
Existing brushless motors are prone to dust entering through the heat dissipation holes, leading to motor failure. It is difficult to find a balance between heat dissipation and dust prevention.
The dustproof components are designed, including a sleeve and a dustproof plate. The sleeve has a dust-collecting layer inside, which, combined with the heat dissipation fan blades and air vents, achieves a combination of effective heat dissipation and dust prevention.
This ensures efficient heat dissipation for the motor while preventing dust from entering, thus improving the motor's stable operation and dust prevention effect.
Smart Images
Figure CN223527896U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a brushless motor technical field especially relates to a brushless motor. BACKGROUND
[0002] The brushless DC motor is composed of a motor main body and a driver, and is a typical mechatronic product. Since the brushless DC motor operates in a self-control mode, it does not need to add a starting winding to the rotor like a synchronous motor under heavy load starting of frequency conversion speed regulation, and it also does not produce oscillation and out-of-step when the load suddenly changes. The permanent magnet of the small and medium capacity brushless DC motor is now mostly made of high magnetic energy level rare earth neodymium iron boron (Nd-Fe-B) material.
[0003] The existing brushless motor is generally used for unmanned aerial vehicles, and the unmanned aerial vehicles have certain requirements for the weight and heat dissipation of the motor. Therefore, a large heat dissipation hole must be formed in the top of the motor. During the use, assembly processing and maintenance of the unmanned aerial vehicle, for example, during the flight on the sand beach, sand is easy to fall into the heat dissipation hole and then enter the inside of the motor, resulting in the failure of the motor rotation. UTILITY MODEL CONTENTS
[0004] The utility model aims at solving the shortcomings in the prior art and provides a brushless motor.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a brushless motor, comprising a rotor shell, an intermediate shell, a motor main shaft, a bottom shell and a magnet assembly.
[0006] The motor main shaft penetrates the rotor shell in the axial direction and is rotationally connected with the rotor shell. The rotor shell is fixedly connected with the intermediate shell, and the magnet assembly is fixedly arranged along the inner wall surface of the intermediate shell in the circumferential direction.
[0007] The end of the intermediate shell away from the rotor shell is fixedly connected with the bottom shell. At least one heat dissipation hole is formed in the rotor shell.
[0008] A dustproof assembly is arranged on the heat dissipation hole, and the dustproof assembly is used for blocking the dust from entering the inside of the intermediate shell.
[0009] Preferably, the dustproof assembly comprises a sleeve arranged on the heat dissipation hole, the end of the sleeve is fixedly connected with a dustproof plate, the dustproof plate is provided with a ventilation hole, and a dust absorption layer is fixedly connected in the sleeve, and the dust absorption layer is spirally arranged on the inner wall of the sleeve.
[0010] Preferably, the dust absorption layer is made of high-hygroscopic non-woven fabric.
[0011] Preferably, the bottom shell is provided with an air outlet hole.
[0012] Preferably, the brushless motor further comprises a stator assembly arranged inside the intermediate housing, the stator assembly comprising a bearing assembly, a stator fixing base and a coil piece, an outer ring of the bearing assembly is fixedly connected with the stator fixing base, an inner ring of the bearing assembly is fixedly connected with the motor spindle, and the coil piece is fixed on the stator fixing base, and the stator fixing base is fixedly connected with the intermediate housing.
[0013] Preferably, one end of the motor spindle is rotatably connected with the bottom shell, and a plurality of heat dissipation fan blades are fixedly connected with an outer surface of the motor spindle.
[0014] The utility model has the advantages of the following beneficial effects:
[0015] In the utility model, the brushless motor has a reasonable structure, the connection and cooperation between the components meet the working principle and performance requirements of the motor, the dustproof assembly is arranged to effectively solve the contradiction between heat dissipation and dust prevention of the motor, and ensure that the motor can work efficiently and avoid dust entering the motor.
[0016] In the utility model, the heat dissipation fan blades arranged on the motor spindle further improve the heat dissipation efficiency and ensure stable operation of the motor. DRAWINGS
[0017] Figure 1 Fig. 1 is a schematic view of the overall structure of the brushless motor in the utility model;
[0018] Figure 2 Fig. 2 is a schematic view of the bottom structure of the brushless motor in the utility model;
[0019] Figure 3 Fig. 3 is a schematic view of the internal structure of the brushless motor in the utility model;
[0020] Figure 4 Fig. 4 is a schematic view of the internal structure of the sleeve in the utility model;
[0021] Figure 5 Fig. 5 is a schematic view of the structure of the dustproof plate in the utility model.
[0022] LEGEND:
[0023] 10-rotor housing, 20-intermediate housing, 30-motor spindle, 40-bottom shell, 50-heat dissipation hole, 60-dustproof assembly, 61-sleeve, 62-dustproof plate, 63-dust absorption layer, 70-heat dissipation fan blade, 80-air outlet, 90-stator assembly, 91-stator fixing piece, 92-coil piece, 93-bearing assembly. DETAILED DESCRIPTION
[0024] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.
[0025] Please refer to Figures 1 to 4 The present application provides a technical scheme:
[0026] A brushless motor, comprising a rotor shell 10, an intermediate shell 20, a motor spindle 30, a bottom shell 40 and a magnet assembly. Among them, the motor spindle 30 penetrates the rotor shell 10 in the axial direction and is rotatably connected with the rotor shell 10; the rotor shell 10 is fixedly connected with the intermediate shell 20, and the magnet assembly is fixedly arranged along the inner wall surface of the intermediate shell 20, and the end of the intermediate shell 20 away from the rotor shell 10 is fixedly connected with the bottom shell 40. At least one cooling hole 50 is formed in the rotor shell 10, and a dustproof assembly 60 is arranged on the cooling hole 50, which is used to prevent dust from entering the inside of the intermediate shell 20, so as to avoid the dust from entering the inside of the brushless motor and causing high temperature in the inside of the brushless motor.
[0027] As a further embodiment of the above technical scheme: the dustproof assembly 60 comprises a sleeve 61 arranged on the cooling hole 50, the end of the sleeve 61 is fixedly connected with a dustproof plate 62, the dustproof plate 62 is provided with a ventilation hole, and the inside of the sleeve 61 is fixedly connected with a dust absorption layer 63, the dust absorption layer 63 is spirally arranged on the inner wall of the sleeve 61, and the dust absorption layer 63 is made of high-hygroscopic non-woven fabric. When the air enters the inside of the sleeve 51 through the cooling hole 50, the dustproof plate 62 can block the larger impurities, and at the same time, the air enters the spiral dust absorption layer 63, the dust absorption layer 63 can adsorb the dust, and the spiral dust absorption layer 63 can increase the air circulation distance, thereby further improving the dustproof efficiency.
[0028] As a further embodiment of the above technical scheme: the bottom shell 40 is provided with an air outlet hole 80, so that the air can be discharged through the air outlet hole 80, thereby realizing air circulation.
[0029] As a further embodiment of the above technical scheme: the brushless motor further comprises a stator assembly 90, which is arranged in the inside of the intermediate shell 20, the stator assembly 90 comprises a bearing assembly 93, a stator fixed seat 91 and a coil 92, the outer ring of the bearing assembly 93 is fixedly connected with the stator fixed seat 91; the inner ring of the bearing assembly 93 is fixedly connected with the motor spindle 30; the coil 92 is fixed on the stator fixed seat 91; the stator fixed seat 91 is fixedly connected with the intermediate shell 20.
[0030] As a further implementation of the above technical solutions: one end of the motor spindle 30 is rotatably connected with the bottom shell 40, and the outer surface of the motor spindle 30 is fixedly connected with a heat dissipation fan blade 70, when the motor spindle 30 rotates, the air circulation is driven by the heat dissipation fan blade 70, thereby increasing the heat dissipation efficiency.
[0031] Working principle:
[0032] When the motor operates, the motor spindle 30 rotates, simultaneously driving the heat dissipation fan blade 70 to rotate, air flow is generated to achieve heat dissipation, the air enters the motor interior through the heat dissipation holes 50 on the rotor shell 10, and is filtered and adsorbed by the dustproof assembly 60, so that most of the dust and impurities are removed, the sleeve 61, the dustproof plate 62 and the spiral dustproof layer 63 in the dustproof assembly 60 jointly act to achieve effective blocking and adsorption of the dust, the clean air exchanges heat with the heat generated by the coil 92 through the gap around the stator assembly 90, and then is discharged through the air outlet 80 on the bottom shell 40, so that air circulation and heat dissipation are achieved.
[0033] In the description of the present application, it should be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance, in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment.
[0034] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A brushless electric motor characterized by: It includes rotor shell (10), intermediate shell (20), motor spindle (30), bottom shell (40) and magnet assembly; Wherein, the motor spindle (30) penetrates the rotor shell (10) in the axial direction, and is rotatably connected with the rotor shell (10); the rotor shell (10) is fixedly connected with the intermediate shell (20), and the magnet assembly is fixedly arranged along the inner wall surface of the intermediate shell (20) in the circumferential direction; The end of the intermediate shell (20) away from the rotor shell (10) is fixedly connected with the bottom shell (40); at least one heat dissipation hole (50) is formed in the rotor shell (10). The dustproof assembly (60) is arranged on the heat dissipation hole (50), and the dustproof assembly (60) is used for blocking dust from entering the inside of the intermediate shell (20).
2. A brushless motor according to claim 1, characterized in that: The dustproof assembly (60) includes a sleeve (61) arranged on the heat dissipation hole (50), and the end of the sleeve (61) is fixedly connected with a dustproof plate (62), the dustproof plate (62) is provided with a ventilation hole, and the inside of the sleeve (61) is fixedly connected with a dust absorption layer (63), and the dust absorption layer (63) is spirally arranged on the inner wall of the sleeve (61).
3. A brushless motor according to claim 2, characterized in that: The dust absorption layer (63) is made of high-hygroscopic non-woven fabric.
4. A brushless motor according to claim 1, characterized in that: The bottom shell (40) is provided with an air outlet (80).
5. A brushless motor according to claim 1, characterized in that: It also includes a stator assembly (90), which is arranged inside the intermediate shell (20) and includes a bearing assembly (93), a stator fixed seat (91) and a coil (92), the outer ring of the bearing assembly (93) is fixedly connected with the stator fixed seat (91), the inner ring of the bearing assembly (93) is fixedly connected with the motor spindle (30), the coil (92) is fixed on the stator fixed seat (91), and the stator fixed seat (91) is fixedly connected with the intermediate shell (20).
6. A brushless motor according to claim 1, characterized in that: One end of the motor spindle (30) is rotatably connected with the bottom shell (40), and the outer surface of the motor spindle (30) is fixedly connected with a heat dissipation fan blade (70).