Novel side-mounted brushless direct current motor

Abstract

The invention relates to the technical field of motors, in particular to a novel side-mounted brushless direct current motor. The brushless direct current motor comprises an outer shell, a stator assembly, a rotor assembly, a positioning sleeve, an elastic piece, an interface piece and a motor interface board. The outer shell comprises a first shell and a second shell, the two ends of the first shell are provided with axial through bearing mounting holes, the side face of the first shell is provided with an opening, and the second shell is detachably installed on the opening in the side edge of the first shell to form the outer shell of the motor; the stator assembly is located in the outer shell, the rotor assembly penetrates through the stator assembly and is located in the outer shell, and the rotor assembly is sleeved with the positioning sleeve and the elastic piece. And the interface piece is arranged on the motor interface board and is used for plugging and supplying power to an external power supply. The end face, away from the interface piece, of the motor interface board is fixed to one end of the outer shell. According to the invention, high concentricity of the two bearings can be ensured, and motor noise and influence on the service life caused by deflection of the bearings are avoided.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a novel side-mounted brushless DC motor. Background Art

[0002] At present, brushless DC motors have higher requirements for bearing installation accuracy when running at high speeds. Existing brushless DC motors are usually designed for axial installation, with two bearings separately fixed on different parts and then assembled together, resulting in the concentricity of the two bearings being unable to be guaranteed. The bearings are skewed, causing the motor to generate high-frequency and harsh mechanical noise during high-speed operation, and also affecting the inherent service life of the bearings.

[0003] Therefore, how to design a brushless DC motor that can ensure that the two bearings maintain a high degree of concentricity and avoid motor noise and life-span reduction caused by bearing skew is an important technical problem that technicians in this field need to solve. Summary of the invention

[0004] In order to overcome some of the defects and shortcomings in the prior art, the present application provides a new side-mounted brushless DC motor, which can ensure that the two bearings maintain a high degree of concentricity and avoid motor noise and life-span impact caused by bearing skew.

[0005] Specifically, an embodiment of the present invention provides a novel side-mounted brushless DC motor, which adopts the following technical solution: A new type of side-mounted brushless DC motor comprises: an outer shell, comprising a first shell and a second shell, the second shell is detachably mounted at the side opening of the first shell, and the first shell is provided with a first axial mounting hole and a second axial mounting hole at both ends and passes through the inner cavity; a stator assembly is radially mounted in the inner cavity of the outer shell through the opening, the stator assembly is provided with a stator through hole passing through the first axial mounting hole and the second axial mounting hole; a rotor assembly passes through the stator through hole, with its two ends respectively exposed to the first axial mounting hole and the second axial mounting hole, and comprises: a magnetic ring, a shaft core member, a first bearing sleeve member, a second bearing sleeve member and a fan blade member, the magnetic ring is sleeved on the shaft core member and located in the stator through hole, the first bearing sleeve member and the second bearing sleeve member are sleeved on both ends of the shaft core member and are respectively fixed in the first axial mounting hole and the second axial mounting hole, and the fan blade member is sleeved on the shaft core member, close to the second axial mounting hole.

[0006] By adopting the above technical solution, the first bearing sleeve and the second bearing sleeve are respectively sleeved on the two ends of the shaft core member, and are located in the first axial mounting hole and the second axial mounting hole, which can ensure that the two bearings maintain a high concentricity and effectively prevent the increase of motor noise and shortened service life caused by the skewness of the bearings. In addition, the second shell can be detachably installed on the side of the first shell, and the stator assembly is axially located in the inner cavity of the outer shell, which can facilitate the assembly and maintenance of the motor as a whole; the rotor assembly passes through the stator through hole, and the first bearing sleeve and the second bearing sleeve are sleeved and fixed in the first axial mounting hole and the second axial mounting hole respectively, which can ensure the stability of the motor during operation; the magnetic ring is sleeved on the shaft core member, which can enhance the magnetic field strength and improve the motor efficiency; the fan blade member is sleeved on the end of the second bearing sleeve member away from the magnetic ring, and when the shaft core member drives the fan blade to rotate at high speed, a very high-speed airflow can be generated to flow through the ventilation channel of the outer shell.

[0007] Optionally, it also includes: a positioning sleeve, which is sleeved and fixed on the shaft core member and located between the first bearing sleeve member and the magnetic ring; an elastic member, which is sleeved on the shaft core member, one end of which abuts against the inner ring of the first bearing sleeve member and the other end of which abuts against the positioning sleeve.

[0008] By adopting the above technical solution, the arrangement of the positioning sleeve and the elastic member can effectively improve the stability and reliability of the rotor assembly. Specifically, the positioning sleeve is fixed on the shaft core member and is located between the first bearing sleeve member and the magnetic ring, which can ensure the precise positional relationship between the shaft core member and each component and reduce vibration and noise during operation. At the same time, the elastic member is sleeved on the shaft core member, with one end abutting against the inner ring of the first bearing sleeve member and the other end abutting against the positioning sleeve, giving a certain pre-pressure to the first bearing sleeve member and the second bearing sleeve member, so that they are in a high degree of freedom state, further improving the operating stability of the motor.

[0009] Optionally, the outer shell includes: an outer side surface and an inner side surface, and a ventilation channel relative to the fan blade member is arranged between the outer side surface and the inner side surface.

[0010] By adopting the above technical solution, the ventilation channel between the outer side and the inner side of the outer shell can effectively guide the airflow generated by the fan blades, improve the heat dissipation efficiency, ensure the stability of motor operation and extend the service life.

[0011] Optionally, fixing holes are provided at one end of the first shell and the second shell for fixing parts to be inserted and fixed in sequence; a plug-in hole is provided at the inner bottom end of the first shell, and a plug-in part is provided at the other end of the second shell relative to the plug-in hole.

[0012] By adopting the above technical solution, fixing holes are relatively arranged at one end of the first shell and the second shell, so that the fixing parts can be inserted and fixed in sequence, and then a plug-in hole is arranged at the inner bottom end of the first shell, and a plug-in part is arranged at the other end of the second shell relative to the plug-in hole, which can further enhance the connection stability between the two shells, simplify the assembly process, and improve the assembly efficiency.

[0013] Optionally, it also includes an interface component and a motor interface board, wherein the interface component is arranged at one end of the motor interface board away from the outer shell, and the motor interface board cover is arranged on the upper end of the first axial mounting hole; a PIN pin is arranged on one end of the stator assembly for welding and fixing it to the motor interface board.

[0014] By adopting the above technical solution, the motor interface board cover is arranged at the upper end of the first axial mounting hole, and is welded and fixed to the motor interface board in cooperation with the PIN pin arranged on the stator assembly, so that a quick and reliable connection can be formed between the two. The PIN pin arranged at one end of the stator assembly is welded and fixed to the motor interface board, which ensures the stability and reliability of the electrical connection and reduces the failure rate caused by poor contact. In addition, the interface part is arranged at one end of the motor interface board away from the outer shell, which facilitates the connection and maintenance of the external circuit, simplifies the assembly process, and reduces the production cost.

[0015] Optionally, a positioning column is provided on one end of the first shell close to the motor interface board, and a positioning hole is provided on the motor interface board corresponding to the positioning column, wherein the motor interface board is sleeved on the positioning column through the positioning hole for positioning and fixing.

[0016] By adopting the above technical solution, the design of the positioning column and the positioning hole can achieve precise positioning and firm fixation between the motor interface board and the first shell, ensuring that the motor interface board will not shift or loosen during operation, thereby improving the overall stability and reliability of the motor.

[0017] Optionally, the inner cavity of the stator assembly is provided with a plurality of winding slots for winding the stator coils.

[0018] By adopting the above technical solution, a plurality of winding slots are provided in the inner cavity of the stator assembly, so that the stator coils can be distributed more evenly, thereby improving the electromagnetic performance and operating efficiency of the motor.

[0019] Optionally, one end of the first shell is provided with a plurality of grooves for the PIN needles to pass through.

[0020] By adopting the above technical solution, a plurality of grooves are provided at one end of the first shell for the PIN pins to pass through, thereby ensuring a sufficient creepage distance between the PIN pins and the outer shell and facilitating assembly operations during the manufacturing process.

[0021] Optionally, a receiving groove penetrating the first axial mounting hole, the second axial mounting hole and the ventilation channel is provided at one end of the outer shell away from the motor interface board, and the fan blade member is located in the receiving groove.

[0022] By adopting the above technical solution, the outer housing of the brushless DC motor is provided with a receiving groove that passes through the first axial mounting hole, the second axial mounting hole and the ventilation channel at one end away from the motor interface board, and the fan blade is located in the receiving groove. This design allows the high-speed airflow generated by the fan blade to flow effectively, improves the heat dissipation effect, and at the same time reduces the space occupied by the motor and improves the compactness of the structure.

[0023] Optionally, the plug holes and the plug connectors are arranged in a one-to-one correspondence.

[0024] By adopting the above technical solution, the plug holes and the connectors are set to a plurality of corresponding ones, which improves the stability and reliability of the outer shell connection and ensures that the motor will not loosen or fall off during operation, thereby ensuring the smoothness and safety of the motor operation.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: By detachably mounting the second housing on the side of the first housing, the stator assembly and the rotor assembly can be assembled and maintained more conveniently, thereby improving the assembly efficiency and maintenance convenience of the motor; The first bearing sleeve and the second bearing sleeve in the rotor assembly are sleeved at both ends of the shaft core and are respectively located in the first axial mounting hole and the second axial mounting hole, ensuring high concentricity of the two bearings and effectively avoiding the problems of motor noise and shortened bearing life caused by bearing skew; The fan blade assembly is arranged at the end of the second bearing assembly away from the magnetic ring. The fan blade is driven to rotate at high speed by the shaft core to generate high-speed airflow flowing through the ventilation channel of the shell, thereby achieving effective heat dissipation function and improving the stability and reliability of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the three-dimensional structure of a novel side-mounted brushless DC motor disclosed in an embodiment of the present application; Figure 2 for Figure 1 A cross-sectional schematic diagram of a novel side-mounted brushless DC motor is shown; Figure 3 for Figure 1 An exploded schematic diagram of a novel side-mounted brushless DC motor is shown; Figure 4 for Figure 1 An exploded schematic diagram of a novel side-mounted brushless DC motor is shown; Figure 5 for Figure 1 A schematic structural diagram of a second housing of a novel side-mounted brushless DC motor is shown; Figure 6 for Figure 1 An exploded structural diagram of a stator assembly and a rotor assembly of a novel side-mounted brushless DC motor is shown; Figure 7 for Figure 1 A schematic diagram of the three-dimensional structure of a novel side-mounted brushless DC motor is shown from another angle.

[0027] Description of reference numerals: 10. Outer shell; 101. Outer side; 102. Inner side; 103. Ventilation channel; 11. First shell; 111. Opening; 112. First axial mounting hole; 113. Second axial mounting hole; 114. Plug-in hole; 115. Positioning column; 116. Recess; 117. Accommodating groove; 12. Second shell; 121. Plug-in component; 13. Fixing hole; 14. Fixing component; 20. Stator assembly; 21. Stator through hole; 22. PIN needle; 23. Winding groove; 30. Rotor assembly; 31. Magnetic ring; 32. Shaft core component; 33. First bearing sleeve component; 34. Second bearing sleeve component; 35. Fan blade component; 40. Positioning sleeve; 50. Elastic component; 60. Interface component; 70. Motor interface board; 71. Positioning hole. DETAILED DESCRIPTION

[0028] The terms used in the following embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to be used as limitations to the present application. As used in the specification and appended claims of the present application, the singular expressions "one", "a kind of", "above", "the" and "this" are intended to also include plural expressions, unless there is a clear indication to the contrary in the context. It should also be understood that the term "and / or" used in the present application refers to and includes any or all possible combinations of one or more listed items.

[0029] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features, and in the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

[0030] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0031] See also Figure 1 and Figure 2The embodiment of the present application discloses a novel side-mounted brushless DC motor, including: an outer shell 10, a stator assembly 20, a rotor assembly 30, a positioning sleeve 40, an elastic member 50, an interface member 60 and a motor interface board 70.

[0032] The stator assembly 20 is located in the outer shell 10, the rotor assembly 30 passes through the stator assembly 20 and is located in the outer shell 10, and the positioning sleeve 40 and the elastic member 50 are sleeved on the rotor assembly 30. The interface member 60 is arranged on the motor interface board 70 for plugging in an external power supply. The end face of the motor interface board 70 away from the interface member 60 is fixed to one end of the outer shell 10.

[0033] Specifically, the outer shell 10 includes a first shell 11 and a second shell 12. Figure 3 As shown, an opening 111 is provided on the side of the first housing 11 , and the second housing 12 is detachably mounted on the opening 111 on the side of the first housing 11 to form an outer housing 10 of the motor.

[0034] For further information, see Figure 4 In this embodiment, in order to facilitate the fixing of the first shell 11 and the second shell 12, fixing holes 13 are arranged at one end of the first shell 11 and the second shell 12, for fixing members 14 such as screws to be inserted in sequence for fixing, and a plurality of plug holes 114 are arranged at the inner bottom end of the first shell 11, and a plurality of plug connectors 121 are arranged at the other end of the second shell 12 relative to the plurality of plug holes 114, such as Figure 5 shown.

[0035] During assembly, the plug connector 121 of the second housing 12 is first inserted into the plug hole 114, and the fixing holes 13 of the first housing 11 and the second housing 12 are correspondingly connected, and then screwed and fixed. In this way, the connection stability between the two housings can be enhanced, and at the same time, the assembly process is simplified and the assembly efficiency is improved.

[0036] For further information, see Figure 3 and Figure 4 The stator assembly 20 is radially installed in the inner cavity of the outer shell 10 through the opening 111 on the side of the first shell 11 during installation.

[0037] Among them, in the overall structure of the brushless DC motor, the stator assembly 20 is axially located in the inner cavity. The stator assembly 20 is provided with a stator through hole 21 that penetrates the first axial mounting hole 112 and the second axial mounting hole 113, and the rotor assembly 30 penetrates the stator through hole 21, and the two ends are exposed in the first axial mounting hole 112 and the second axial mounting hole 113 respectively.

[0038] For details, see Figure 6The rotor assembly 30 includes a magnetic ring 31, a shaft core member 32, a first bearing sleeve member 33, a second bearing sleeve member 34 and a fan blade member 35. The magnetic ring 31 is sleeved on the shaft core member 32 and located in the stator through hole 21 to enhance the magnetic field strength and improve the motor efficiency.

[0039] The first bearing sleeve 33 and the second bearing sleeve 34 are sleeved at both ends of the shaft core 32, and are fixed in the first axial mounting hole 112 and the second axial mounting hole 113 by gluing, for example, so as to ensure that the two bearings (i.e., the first bearing sleeve 33 and the second bearing sleeve 34) maintain a high concentricity, so as to effectively prevent the increase of motor noise and shortening of service life caused by the skewness of the bearings. The fan blade 35 is sleeved at one end of the second bearing sleeve 34 away from the magnetic ring 31, so as to rotate with the rotation of the shaft core 32.

[0040] For further information, see Figure 2 and Figure 5 The outer shell 10 includes an outer side surface 101 and an inner side surface 102 , and a ventilation channel 103 relative to the wind blade member 35 is provided between the outer side surface 101 and the inner side surface 102 .

[0041] The motor interface board 70 is fixed to one end of the outer shell 10, and the other end of the outer shell 10, i.e., the end away from the motor interface board 70, is provided with a receiving groove 117 that passes through the first axial mounting hole 112, the second axial mounting hole 113 and the ventilation channel 103, and the fan blade 35 is located in the receiving groove 117 (such as Figure 7 As shown), the fan blade member 35 can better utilize the airflow and improve the heat dissipation effect, while reducing the internal space occupied by the motor and improving the compactness of the structure.

[0042] For further information, see Figure 2 and Figure 6 The positioning sleeve 40 is sleeved and fixed on the shaft core member 32 and is located between the first bearing sleeve member 33 and the magnetic ring 31. The elastic member 50, that is, the spring, is sleeved on the shaft core member 32, one end of which abuts against the inner ring of the first bearing sleeve member 33, and the other end abuts against the positioning sleeve 40.

[0043] Among them, the positioning sleeve 40 is fixed on the shaft core 32 and is located between the first bearing sleeve 33 and the magnetic ring 31, which can ensure the precise position relationship between the shaft core 32 and each component, and reduce vibration and noise during operation. At the same time, the elastic member 50 is sleeved on the shaft core 32, with one end abutting against the inner ring of the first bearing sleeve 33, and the other end abutting against the positioning sleeve 40, giving a certain pre-pressure to the first bearing sleeve 33 and the second bearing sleeve 34, so that they are in a high degree of freedom state, further improving the running stability of the motor. In this way, the setting of the positioning sleeve 40 and the elastic member 50 can effectively improve the stability and reliability of the rotor assembly 30.

[0044] For further information, see Figure 4 and Figure 6 The interface member 60 is disposed at one end of the motor interface board 70 away from the outer shell 10, and the motor interface board 70 is covered at the upper end of the first axial mounting hole 112. A PIN pin 22 is disposed on one end of the stator assembly 20 for being fixed to the motor interface board 70 by welding.

[0045] The motor interface board 70 is covered at the upper end of the first axial mounting hole 112, and is welded and fixed to the motor interface board 70 in cooperation with the PIN pin 22 provided on the stator assembly 20, so that a quick and reliable connection can be formed between the two. The PIN pin 22 provided at one end of the stator assembly 20 is welded and fixed to the motor interface board 70, which ensures the stability and reliability of the electrical connection and reduces the failure rate caused by poor contact. In addition, the interface part 60 is provided at one end of the motor interface board 70 away from the outer shell 10, which facilitates the connection and maintenance of the external circuit, simplifies the assembly process, and reduces the production cost.

[0046] For further information, see Figure 4 , a plurality of PIN pins 22 are provided on the stator assembly 20 to facilitate the welding and fixing of the motor interface board 70. A positioning column 115 is provided on one end of the first housing 11 close to the motor interface board 70, and a positioning hole 71 is provided on the motor interface board 70 corresponding to the positioning column 115. The motor interface board 70 is sleeved on the positioning column 115 through the positioning hole 71 for positioning and fixing, thereby ensuring that the motor interface board 70 will not deviate or loosen during operation, thereby improving the overall stability and reliability of the motor.

[0047] In order to facilitate assembly operations during the manufacturing process, a plurality of grooves 116 are provided at one end of the first shell 11 for the PIN pins 22 to pass through, thereby ensuring sufficient creepage distance between the PIN pins 22 and the outer shell 10 and facilitating assembly operations during the manufacturing process.

[0048] In addition, a plurality of winding slots 23 are provided in the inner cavity of the stator assembly 20 for winding the stator coils.

[0049] The provision of a plurality of winding slots 23 facilitates the winding of the coil and enables the stator coil to be more evenly distributed, thereby effectively improving the electromagnetic performance and operating efficiency of the motor.

[0050] In summary, a new type of side-mounted brushless DC motor disclosed in an embodiment of the present application, by detachably mounting the second shell 12 on the side of the first shell 11, allows the stator assembly 20 and the rotor assembly 30 to be more conveniently assembled and maintained, thereby significantly improving the assembly efficiency and maintenance convenience of the motor; the first bearing sleeve 33 and the second bearing sleeve 34 are respectively sleeved on the two ends of the shaft core member 32, and are respectively located in the first axial mounting hole 112 and the second axial mounting hole 113, thereby ensuring the high concentricity of the two bearings and effectively avoiding the problems of high-frequency mechanical noise and shortened bearing life caused by bearing skew; the ventilation flow channel 103 arranged inside the stator assembly 20 cooperates with the fan blade member 35 to achieve efficient heat dissipation function, enhance the stability and reliability of the motor, and extend the service life of the motor.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A novel side-mounted brushless DC motor, characterized in that: include: The outer shell (10) comprises a first shell (11) and a second shell (12), wherein the second shell (12) is detachably mounted at a side opening (111) of the first shell (11), and the first shell (11) is provided with a first axial mounting hole (112) and a second axial mounting hole (113) at both ends thereof and passes through the inner cavity; A stator assembly (20) is radially mounted in the inner cavity of the outer shell (10) through the opening (111), the stator assembly (20) being provided with a stator through hole (21) penetrating the first axial mounting hole (112) and the second axial mounting hole (113); The rotor assembly (30) passes through the stator through-hole (21), with its two ends respectively exposed in the first axial mounting hole (112) and the second axial mounting hole (113), and comprises: a magnetic ring (31), a shaft core (32), a first bearing sleeve (33), a second bearing sleeve (34) and a fan blade (35); the magnetic ring (31) is sleeved on the shaft core (32) and located in the stator through-hole (21); the first bearing sleeve (33) and the second bearing sleeve (34) are sleeved on the two ends of the shaft core (32) and fixed in the first axial mounting hole (112) and the second axial mounting hole (113); and the fan blade (35) is sleeved on the shaft core (32) and close to the second axial mounting hole (113).

2. A new side-mounted brushless DC motor according to claim 1, characterized in that: Also includes: A positioning sleeve (40) is sleeved and fixed on the shaft core component (32) and is located between the first bearing sleeve component (33) and the magnetic ring (31); An elastic member (50) is sleeved on the shaft core member (32), one end of which abuts against the inner ring of the first bearing sleeve member (33), and the other end of which abuts against the positioning sleeve (40).

3. A new side-mounted brushless DC motor according to claim 1, characterized in that: The outer shell (10) comprises an outer side surface (101) and an inner side surface (102), and a ventilation flow channel (103) relative to the fan blade (35) is provided between the outer side surface (101) and the inner side surface (102).

4. A new side-mounted brushless DC motor according to claim 1, characterized in that: Fixing holes (13) are arranged at one end of the first shell (11) and the second shell (12) opposite to each other, and are used for fixing members (14) to be inserted and fixed in sequence; The inner bottom end of the first shell (11) is provided with a plug hole (114), and the other end of the second shell (12) is provided with a plug connector (121) opposite to the plug hole (114).

5. A new side-mounted brushless DC motor according to claim 3, characterized in that: It also includes an interface component (60) and a motor interface plate (70), wherein the interface component (60) is arranged at one end of the motor interface plate (70) away from the outer shell (10), and the motor interface plate (70) is covered on the upper end of the first axial mounting hole (112); A PIN pin (22) is provided on one end of the stator assembly (20) for being welded and fixed to the motor interface board (70).

6. A new side-mounted brushless DC motor according to claim 5, characterized in that: A positioning column (115) is provided on one end of the first shell (11) close to the motor interface board (70), and a positioning hole (71) is provided on the motor interface board (70) corresponding to the positioning column (115), wherein the motor interface board (70) is sleeved on the positioning column (115) through the positioning hole (71) for positioning and fixing.

7. A new side-mounted brushless DC motor according to claim 5, characterized in that: The inner cavity of the stator assembly (20) is provided with a plurality of winding slots (23) for winding the stator coil.

8. A new side-mounted brushless DC motor according to claim 5, characterized in that: One end of the first housing (11) is provided with a plurality of grooves (116) for the PIN needles (22) to pass through.

9. A new side-mounted brushless DC motor according to claim 5, characterized in that: An accommodating groove (117) penetrating the first axial mounting hole (112), the second axial mounting hole (113) and the ventilation channel (103) is provided at one end of the outer shell (10) away from the motor interface plate (70), and the fan blade member (35) is located in the accommodating groove (117).

10. A new side-mounted brushless DC motor according to claim 4, characterized in that: The plug holes (114) and the plug connectors (121) are arranged in a one-to-one correspondence in a plurality.

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