High-speed brushless motor capable of efficiently dissipating heat

Abstract

The invention discloses a high-speed brushless motor capable of efficiently dissipating heat. The high-speed brushless motor comprises a rotor seat, a rotor winding, a stator seat, a stator winding, a motor shaft, a bearing assembly, a first fan and a second fan, a plurality of first air holes are formed in the front side of the rotor seat; the stator base is located on the rear side of the rotor base and provided with a shaft groove penetrating front and back. The rear side of the stator base is provided with a plurality of second air holes. A first rotating cavity located on the front side of the stator winding and a second rotating cavity located on the rear side of the stator winding are formed between the stator base and the rotor base. The motor shaft penetrates through the shaft groove and is connected with the stator seat through a bearing assembly; the first fan is located in the first rotating cavity and connected with the rotor base, and the second fan is located in the second rotating cavity and connected with the rotor base; by means of the structure, good heat dissipation can be provided when the motor rotates forwards or reversely, the power upper limit of the motor is effectively improved, the service life of the motor is effectively prolonged, and use requirements are met.

Description

Technical Field

[0001] This invention relates to the field of electric motors, and in particular to a high-speed brushless motor with efficient heat dissipation. Background Technology

[0002] A brushless motor consists of a motor body and a driver, and is a typical mechatronic product. A brushless motor relies on changing the alternating frequency and waveform of the current input to its stator coils to create a magnetic field rotating around the motor's geometric axis. This magnetic field drives the permanent magnets on the rotor to rotate, thus making the motor rotate. Because brushless motors operate at high speeds, they generate a corresponding amount of heat. Typically, a fan is designed on the rotor to dissipate this heat. However, current brushless motors only have one fan. When rotating forward, the fan blows the heat outwards, and when rotating in reverse, it draws in external air and blows it into the motor. This results in slightly poor heat dissipation. Therefore, there is an urgent need to improve the motor's heat dissipation structure. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a high-speed brushless motor with efficient heat dissipation.

[0004] One embodiment of the present invention provides a technical solution to solve its technical problem: a high-speed brushless motor with efficient heat dissipation, comprising a rotor base, rotor windings, a stator base, stator windings, a motor shaft, a bearing assembly, a first fan, and a second fan; Several first air holes are provided on the front side of the rotor base; The rotor windings are mounted on the inner wall of the rotor housing; The stator base is located behind the rotor base and has a shaft groove that runs through it from front to back. Several second air holes are provided on the rear side of the stator base. The stator winding is mounted on the stator base, and the rotor winding is arranged around the outside of the stator winding. A first rotating cavity located in front of the stator winding and a second rotating cavity located behind the stator winding are constructed between the stator base and the rotor base. The motor shaft passes through a shaft groove and is connected to the stator housing via a bearing assembly; The first fan is located in the first rotating cavity and connected to the rotor base, and the second fan is located in the second rotating cavity and connected to the rotor base.

[0005] As one of the preferred embodiments of the present invention, a first plug-in sleeve extending into the first rotating cavity is provided on the rotor seat, a first fan is inserted into the first plug-in sleeve and is engaged with the first plug-in sleeve by a first spline, and a motor shaft passes through the first plug-in sleeve.

[0006] As one of the preferred embodiments of the present invention, the end of the first plug sleeve has an outward first flange, which abuts against the rear end of the first fan.

[0007] As one of the preferred embodiments of the present invention, the rotor base includes a first rotor base body and a second rotor base body installed on the rear side of the first rotor base body through a first bolt connection structure. The first rotor base body and the second rotor base body form a first rotating cavity. The first fan and the stator winding are located in the first rotating cavity and connected to the first rotor base body. The second rotor base body and the stator base form a second rotating cavity. The second fan is located in the second rotating cavity and connected to the second rotor base body.

[0008] As one of the preferred embodiments of the present invention, the second rotor base is provided with a second plug sleeve extending into the second rotating cavity, the second fan is inserted into the second plug sleeve and is engaged with the second plug sleeve by a second spline, and the motor shaft passes through the second plug sleeve.

[0009] As one of the preferred embodiments of the present invention, the end of the second plug sleeve has an outward second flange, which abuts against the rear end of the second fan.

[0010] As one of the preferred embodiments of the present invention, the stator base includes a first stator base body and a second stator base body installed on the rear side of the first stator base body through a second bolt connection structure. The first stator base body is located in a first rotating cavity, the stator winding is assembled on the first stator base body, and the second stator base body and the second rotor base body form a second rotating cavity.

[0011] As one of the preferred embodiments of the present invention, a rearwardly extending and through-hole outlet slot is constructed on the stator base, and the lead wires of the stator winding pass through the outlet slot and are connected to the external driver.

[0012] As one of the preferred embodiments of the present invention, a first mounting groove is formed on the front side of the stator base and a second mounting groove is formed on the rear side. The first mounting groove and the second mounting groove are connected to the shaft groove. The bearing assembly includes a first bearing and a second bearing. The outer ring of the first bearing is mounted on the inner wall of the first mounting groove, and the outer ring of the second bearing is mounted on the inner wall of the second mounting groove. The inner rings of the first bearing and the inner rings of the second bearing are connected to the motor shaft.

[0013] In one of the preferred embodiments of the present invention, the blades of the first fan are tilted in the opposite direction to the blades of the second fan.

[0014] The beneficial effects of this invention are as follows: A high-speed brushless motor with efficient heat dissipation includes a rotor base, rotor windings, a stator base, stator windings, a motor shaft, a bearing assembly, a first fan, and a second fan. The rotor base has several first air vents on its front side. The rotor windings are disposed on the inner wall of the rotor base. The stator base is located on the rear side of the rotor base and has a through-groove. Several second air vents are also provided on the rear side of the stator base. The stator windings are mounted on the stator base, and the rotor windings surround the outer side of the stator windings. A first rotating cavity located on the front side of the stator windings and a second rotating cavity located on the rear side of the stator windings are constructed between the stator base and the rotor base. The motor shaft passes through the shaft groove and is connected to the stator base via the bearing assembly. The first fan is located in the first rotating cavity and connected to the rotor base, and the second fan is located in the second rotating cavity and connected to the rotor base. This structure provides excellent heat dissipation during both forward and reverse rotation of the motor, effectively increasing the motor's power limit and service life, and meeting usage requirements. Attached Figure Description

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 A schematic diagram of the first structure of a high-speed brushless motor with efficient heat dissipation; Figure 2 This is a schematic diagram of the second structure of a high-speed brushless motor with efficient heat dissipation. Figure 3 An exploded view of a high-speed brushless motor with efficient heat dissipation. Figure 4 This is a cross-sectional view of a high-speed brushless motor with efficient heat dissipation. Detailed Implementation

[0016] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0017] In the description of this invention, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0018] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0019] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integrally formed connection; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0020] Reference Figures 1 to 4 A high-speed brushless motor with efficient heat dissipation includes a rotor base 10, a rotor winding 20, a stator base 30, a stator winding 40, a motor shaft 50, a bearing assembly 60, a first fan 71, and a second fan 72. Several first air holes 81 are provided on the front side of the rotor base 10; The rotor winding 20 is disposed on the inner side wall of the rotor seat 10; The stator base 30 is located behind the rotor base 10 and has a shaft groove 83 that runs through the front and rear. Several second air holes 82 are provided on the rear side of the stator base 30. The stator winding 40 is mounted on the stator base 30, and the rotor winding 20 surrounds the outside of the stator winding 40. A first rotating cavity 84 located in front of the stator winding 40 and a second rotating cavity 85 located behind the stator winding 40 are constructed between the stator base 30 and the rotor base 10. The motor shaft 50 passes through the shaft groove 83 and is connected to the stator seat 30 through the bearing assembly 60; The first fan 71 is located in the first rotating cavity 84 and is connected to the rotor base 10, and the second fan 72 is located in the second rotating cavity 85 and is connected to the rotor base 10.

[0021] In this invention, the lead wire of the stator winding 40 is connected to an external driver to receive control signals from the driver, thereby changing the alternating frequency and waveform of the current wave input to the stator winding 40, forming a magnetic field rotating around the geometric axis of the motor around the stator winding 40, thereby driving the rotor winding 20 and the rotor base 10 to rotate, and finally driving the motor shaft 50 to rotate. When the direction of the current is changed, the rotation direction of the motor shaft 50 will be reversed. Specifically, the first fan 71 is located in the first rotating cavity 84 and connected to the rotor base 10, and the second fan 72 is located in the second rotating cavity 85 and connected to the rotor base 10, which will cause the first fan 71 and the second fan 72 to rotate synchronously with the rotor base 10, thereby dissipating the heat generated during the operation of the motor from the first vent 81 and / or the second vent 82 to the outside.

[0022] When the blades of the first fan 71 are tilted in the opposite direction to the blades of the second fan 72, and the first fan 71 blows air outward when rotating clockwise, and the second fan 72 blows air outward when rotating clockwise, if the motor is rotating clockwise, the first fan 71 will extract the heat generated during operation and discharge it through the first air hole 81, and the second fan 72 will extract the heat generated during operation and discharge it through the second air hole 81. If the motor is rotating counterclockwise, the first fan 71 will blow cold air from the outside into the motor through the first air hole 81, and the second fan 72 will blow cold air from the outside into the motor through the second air hole 82, thus cooling the motor.

[0023] When the blades of the first fan 71 are tilted in the opposite direction to the blades of the second fan 72, and the first fan 71 blows air inward when rotating clockwise, and the second fan 72 blows air inward when rotating clockwise, if the motor is rotating clockwise, the first fan 71 blows cold air from the outside into the motor through the first air hole 81, and the second fan 72 blows cold air from the outside into the motor through the second air hole 82, thus cooling the motor. If the motor is rotating counterclockwise, the first fan 71 extracts the heat generated during operation and discharges it through the first air hole 81, and the second fan 72 extracts the heat generated during operation and discharges it through the second air hole 81.

[0024] When the blades of the first fan 71 are tilted in the same direction as the blades of the second fan 72, and the first fan 71 blows air outward when rotating clockwise and the second fan 72 blows air inward when rotating clockwise, if the motor is rotating clockwise, the first fan 71 will extract the heat generated during operation and discharge it through the first air hole 81, while the second fan 72 will blow cold air from the outside into the motor through the second air hole 82 to achieve air cooling. If the motor is rotating counterclockwise, the first fan 71 will blow cold air from the outside into the motor through the first air hole 81 to achieve air cooling, while the second fan 72 will extract the heat generated during operation and discharge it through the second air hole 82.

[0025] When the blades of the first fan 71 are tilted in the same direction as the blades of the second fan 72, and the first fan 71 blows air inward when rotating clockwise and the second fan 72 blows air outward when rotating clockwise, if the motor is rotating clockwise, the first fan 71 blows cold air from the outside into the motor through the first air hole 81 to achieve air cooling, and the second fan 72 extracts the heat generated during operation and discharges it through the second air hole 82; if the motor is rotating counterclockwise, the first fan 71 extracts the heat generated during operation and discharges it through the first air hole 81, and the second fan 72 blows cold air from the outside into the motor through the second air hole 82 to achieve air cooling.

[0026] Reference Figures 3-4 In some embodiments, a first insertion sleeve 14 extending into a first rotating cavity 84 is provided on the rotor base 10. The first fan 71 is inserted into the first insertion sleeve 14 and is engaged with the first insertion sleeve 14 through a first spline 15. The motor shaft 50 passes through the first insertion sleeve 14. In a further embodiment, the end of the first insertion sleeve 14 has an outward first flange 16, which abuts against the rear end of the first fan 71. Specifically, during assembly, the first fan 71 is inserted into the first insertion sleeve 14, and the two are engaged through the first spline 15, thereby restricting the relative rotation between the first fan 71 and the rotor base 10. Then, the first fan 71 and the rotor base 10 are placed on a fixture, and the end of the first insertion sleeve 14 is flanged and riveted using a riveting process, so that the end of the first insertion sleeve 14 forms the first flange 16. The first flange 16 abuts against the rear end of the first fan 71, so that the first fan 71 and the rotor base 10 are assembled together.

[0027] Reference Figures 1-4 In some embodiments, the rotor base 10 includes a first rotor base body 11 and a second rotor base body 12 mounted on the rear side of the first rotor base body 11 via a first bolt connection structure 13. The first rotor base body 11 and the second rotor base body 12 form a first rotating cavity 84. The first fan 71 and the stator winding 40 are located in the first rotating cavity 84 and connected to the first rotor base body 11. The second rotor base body 12 and the stator base 30 form a second rotating cavity 85. The second fan 72 is located in the second rotating cavity 85 and connected to the second rotor base body 12. Specifically, the first plug sleeve 14 is located on the first rotor base body 11. During assembly, the first fan 71 is first assembled onto the first plug sleeve 14 according to the above process, and then the second rotor base body 12 is mated to the rear end of the first rotor base body 11. The two are assembled together via the first bolt connection structure 13. Furthermore, the threaded hole on the second rotor base body 12 is a countersunk threaded hole, which can hide the bolt and will not interfere with the stator base 30.

[0028] Reference Figures 1-4In some embodiments, the second rotor base 12 is provided with a second insertion sleeve 17 extending into the second rotating cavity 85. The second fan 72 is inserted into the second insertion sleeve 17 and is engaged with the second insertion sleeve 17 through a second spline 18. The motor shaft 50 passes through the second insertion sleeve 17. In a further embodiment, the end of the second insertion sleeve 17 has an outward second flange 19, which abuts against the rear end of the second fan 72. Specifically, during assembly, the second fan 72 is inserted into the second insertion sleeve 17, and the two are engaged through the second spline 18, thereby restricting the relative rotation between the second fan 72 and the second rotor base 12. Then, the second fan 72 and the second rotor base 12 are placed on a fixture, and the end of the second insertion sleeve 17 is flanged and riveted using a riveting process, so that the end of the second insertion sleeve 17 forms the second flange 19. The second flange 19 abuts against the rear end of the second fan 72, so that the second fan 72 and the second rotor base 12 are assembled together.

[0029] Reference Figures 1-4 In some embodiments, the stator base 30 includes a first stator base body 31 and a second stator base body 32 mounted on the rear side of the first stator base body 31 via a second bolt connection structure 33. The first stator base body 31 is located within a first rotating cavity 84, and the stator winding 40 is mounted on the first stator base body 31. The second stator base body 32 and the second rotor base body 12 form a second rotating cavity 85. Specifically, at least a portion of the first stator base body 31 extends into a through slot on the second rotor base body 12, and the second stator base body 32 is provided with... A through hole corresponding to the through groove is provided, and a third flange 96 extending into the through groove is provided on the inner wall of the through hole. The second bolt connection structure 33 includes a bolt, a first threaded hole provided on the third flange 96, and a second threaded hole provided on the through groove. The bolt is threaded into both the first threaded hole and the second threaded hole at the same time, thereby assembling the first stator base 31 and the second stator base 32 together. Furthermore, a third threaded hole 94 is provided on the second stator base 32 for connecting and installing the motor with external connectors.

[0030] Reference Figures 3-4 In some embodiments, a rearwardly extending and through-type lead-out groove 91 is constructed on the stator base 30, and the lead-out wires of the stator winding 40 pass through the lead-out groove 91 and are connected to an external driver; further, the lead-out groove 91 is constructed on the first stator base 31, and the second stator base 32 is provided with a clearance hole 95 opposite to the lead-out groove 91, and the lead-out wires of the stator winding 40 are connected to the external driver through the lead-out groove 91 and the clearance hole 95; further, the lead-out groove 91 is filled with sealant covering the lead-out wires of the stator winding 40, which can prevent the lead-out wires of the stator winding 40 from loosening in the lead-out groove 91 and rubbing against the second rotor base 12, causing damage.

[0031] Reference Figures 3-4 In some embodiments, the stator base 30 has a first mounting groove 92 on its front side and a second mounting groove 93 on its rear side. The first mounting groove 92 and the second mounting groove 93 communicate with the shaft groove 83. The bearing assembly 60 includes a first bearing 61 and a second bearing 62. The outer ring of the first bearing 61 is mounted on the inner wall of the first mounting groove 92, and the outer ring of the second bearing 62 is mounted on the inner wall of the second mounting groove 93. The inner rings of the first bearing 61 and the second bearing 62 are connected to the motor shaft 50. The cooperation of the first bearing 61 and the second bearing 62 can improve the smoothness and stability of the rotation of the motor shaft 50.

[0032] The advantages of this invention are that the above structure can provide good heat dissipation when the motor rotates forward or in reverse, effectively improving the upper limit of the motor's power and service life, and meeting the usage requirements.

[0033] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A high-speed brushless motor with efficient heat dissipation, characterized in that: It includes a rotor housing (10), a rotor winding (20), a stator housing (30), a stator winding (40), a motor shaft (50), a bearing assembly (60), a first fan (71), and a second fan (72); The front side of the rotor seat (10) is provided with a number of first air holes (81). The rotor winding (20) is disposed on the inner side wall of the rotor seat (10); The stator seat (30) is located on the rear side of the rotor seat (10) and has a through shaft groove (83) on it. The rear side of the stator seat (30) is provided with a number of second air holes (82). The stator winding (40) is mounted on the stator base (30), and the rotor winding (20) surrounds the outside of the stator winding (40). A first rotating cavity (84) located in front of the stator winding (40) and a second rotating cavity (85) located behind the stator winding (40) are constructed between the stator base (30) and the rotor base (10). The motor shaft (50) passes through the shaft groove (83) and is connected to the stator seat (30) through the bearing assembly (60); The first fan (71) is located in the first rotating cavity (84) and connected to the rotor seat (10), and the second fan (72) is located in the second rotating cavity (85) and connected to the rotor seat (10).

2. The high-speed brushless motor with efficient heat dissipation according to claim 1, characterized in that: The rotor seat (10) is provided with a first plug sleeve (14) extending into the first rotating cavity (84). The first fan (71) is inserted into the first plug sleeve (14) and is engaged with the first plug sleeve (14) by a first spline (15). The motor shaft (50) passes through the first plug sleeve (14).

3. The high-speed brushless motor with efficient heat dissipation according to claim 2, characterized in that: The end of the first plug sleeve (14) has an outward first flange (16), which abuts against the rear end of the first fan (71).

4. The high-speed brushless motor with efficient heat dissipation according to claim 1, characterized in that: The rotor base (10) includes a first rotor base body (11) and a second rotor base body (12) mounted on the rear side of the first rotor base body (11) via a first bolt connection structure (13). The first rotor base body (11) and the second rotor base body (12) form the first rotating cavity (84). The first fan (71) and the stator winding (40) are located in the first rotating cavity (84) and connected to the first rotor base body (11). The second rotor base body (12) and the stator base (30) form the second rotating cavity (85). The second fan (72) is located in the second rotating cavity (85) and connected to the second rotor base body (12).

5. A high-speed brushless motor with efficient heat dissipation according to claim 4, characterized in that: The second rotor base (12) is provided with a second plug sleeve (17) extending into the second rotating cavity (85). The second fan (72) is inserted into the second plug sleeve (17) and is engaged with the second plug sleeve (17) by a second spline (18). The motor shaft (50) passes through the second plug sleeve (17).

6. A high-speed brushless motor with efficient heat dissipation according to claim 5, characterized in that: The end of the second plug sleeve (17) has an outward second flange (19), which abuts against the rear end of the second fan (72).

7. A high-speed brushless motor with efficient heat dissipation according to claim 4, characterized in that: The stator base (30) includes a first stator base body (31) and a second stator base body (32) mounted on the rear side of the first stator base body (31) via a second bolt connection structure (33). The first stator base body (31) is located in the first rotating cavity (84). The stator winding (40) is mounted on the first stator base body (31). The second stator base body (32) and the second rotor base body (12) enclose the second rotating cavity (85).

8. A high-speed brushless motor with efficient heat dissipation according to claim 1, characterized in that: A rearwardly extending and through-hole outlet groove (91) is constructed on the stator base (30), and the lead wire of the stator winding (40) passes through the outlet groove (91) and is connected to the external driver.

9. A high-speed brushless motor with efficient heat dissipation according to claim 1, characterized in that: The stator base (30) has a first mounting groove (92) on its front side and a second mounting groove (93) on its rear side. The first mounting groove (92) and the second mounting groove (93) are connected to the shaft groove (83). The bearing assembly (60) includes a first bearing (61) and a second bearing (62). The outer ring of the first bearing (61) is mounted on the inner wall of the first mounting groove (92), and the outer ring of the second bearing (62) is mounted on the inner wall of the second mounting groove (93). The inner rings of the first bearing (61) and the second bearing (62) are connected to the motor shaft (50).

10. A high-speed brushless motor with efficient heat dissipation according to claim 1, characterized in that: The blades of the first fan (71) are tilted in the opposite direction to the blades of the second fan (72).

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