Compact brushless motor

Abstract

The invention relates to the technical field of brushless motors, in particular to a compact brushless motor which comprises a motor shell, one end of the motor shell is fixedly connected with an end cover through a bolt, the inner wall of the motor shell is rotatably connected with a rotating shaft and penetrates through the end cover, and the inner wall of the motor shell is fixedly connected with a stator. An adjusting mechanism, a limiting mechanism and a cooling mechanism are arranged on the motor shell and the rotating shaft; the adjusting mechanism comprises sliding grooves formed in the two sides of the outer wall of the rotating shaft, the number of the sliding grooves is four, the sliding grooves in each set communicate through communicating holes, sliding blocks are slidably connected to the inner walls of the sliding grooves in each set, and connecting rods are fixedly connected between the sliding blocks in each set. Moving rings are fixedly connected to one ends of the outer sides of the two groups of sliding blocks; the air gap between the rotor and the stator can be adjusted, the transmission path of a magnetic field between the stator and the rotor can be optimized, magnetic resistance and energy loss are reduced, and therefore the efficiency of the motor is improved.

Description

Technical Field

[0001] The invention relates to the technical field of brushless motors, and in particular to a compact brushless motor. Background Art

[0002] Brushless motors generally use a winding form that connects multiple winding coils in parallel to reduce the loss caused by coil impedance. The winding coils wound on the stator core need to be connected through a busbar. The busbar is composed of an injection-molded insulating bracket and multiple connecting conductive sheets embedded in the insulating bracket. The connecting conductive sheets are provided with multiple terminals and distributed along the circumferential direction of the insulating bracket. The number of wire ends that need to be connected to the coils wound on the motor split core is twice the number of slots in the motor stator. The number of terminals on the busbar corresponds to the number of wire ends of the coils on the stator. The compact brushless motor is a brushless DC motor with a new structural principle. It combines the technical characteristics of brushless motors with a compact structural design. The compact design means that the motor is smaller and lighter while maintaining high performance, making it easier to install and use in limited space.

[0003] At present, in the existing technology, the stator-rotor air gap is set to a fixed value, which makes it impossible to dynamically adjust the magnetic circuit layout. This limitation increases the magnetic resistance, causes energy loss, and thus reduces the efficiency of the motor, making it difficult to adapt to diverse load requirements. Especially in situations where high output is required, the motor often cannot reach the optimal working state;

[0004] In addition, attempts to adjust the stator-rotor air gap may cause additional heat generation, aggravating the heat loss of the motor and further affecting the motor efficiency. At the same time, excessive heat will also increase the thermal stress between the stator and rotor, accelerate component fatigue and wear, and shorten the service life of the motor. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a compact brushless motor.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: a compact brushless motor, comprising a motor housing, one end of the motor housing is fixedly connected to an end cover by bolts, the inner wall of the motor housing is rotatably connected to a rotating shaft and passes through the end cover, the inner wall of the motor housing is fixedly connected to a stator, and the motor housing and the rotating shaft are provided with an adjustment mechanism, a limit mechanism and a cooling mechanism;

[0007] The adjusting mechanism comprises slide grooves provided on both sides of the outer wall of the rotating shaft, the number of the slide grooves is set to four groups, the slide grooves in each group are connected by connecting holes, the inner wall of each group of the slide grooves is slidably connected with a slider, a connecting rod is fixedly connected between each group of the sliders, a moving ring is fixedly connected to the outer ends of the two groups of sliders, connecting plates are rotatably connected to the four sides of the outer walls of the two moving rings, a rotor is rotatably connected to one end of each group of connecting plates, a circular groove one is symmetrically provided at one end of the inner side of each group of the rotors, a fixed cylinder is provided on the inner wall of each group of the circular groove one, and each group of the fixed cylinders is fixedly connected to the rotating shaft, the moving ring, the slider and the connecting rod move to change the inclination angle of the connecting plate, thereby moving the rotor outward and changing the distance between the rotor and the stator.

[0008] Preferably, the limiting mechanism includes a fixing column fixedly connected to one end of the motor housing, an adjusting ring is provided on the outer wall of the fixing column, grooves are symmetrically provided on the inner wall of the adjusting ring, threaded rods are threaded through the inner walls of the two grooves, and a fixing cone is fixedly connected to one end of the two threaded rods close to each other.

[0009] Preferably, one end of the adjustment ring close to the motor housing is fixedly connected with a plurality of connecting columns and passes through the motor housing, and the other end of the motor housing is fixedly connected with a pushing ring. The pushing ring is rotatably connected to one of the movable rings, and the fixed cone is tightly abutted against the outer wall of the fixed column to limit and fix the movable ring to prevent loosening.

[0010] Preferably, the limiting mechanism also includes a fixing ring fixedly connected to the end of the adjusting ring away from the motor housing, the outer wall of the fixing ring is symmetrically fixedly connected with a fixing sleeve, the inner walls of the two fixing sleeves are both provided with square columns, and tension springs are fixedly connected between the two groups of square columns and the fixing sleeves.

[0011] Preferably, the two square columns are fixedly connected to a limiting plate at one end away from each other, and the two limiting plates are provided with a polygonal groove on one side of one end close to each other, and the inner walls of the two polygonal grooves are provided with polygonal columns, and the two polygonal columns and two threaded rods are fixedly connected respectively.

[0012] Preferably, the cooling mechanism includes a first cavity, a second cavity and a third cavity opened inside the rotating shaft, and a circular groove 2 is opened on the inner side of the outer wall of the rotating shaft corresponding to the fixed cylinder, and each of the circular grooves 2 is respectively connected to the first cavity, the second cavity and the third cavity through a through hole.

[0013] Preferably, a hollow disk is fixedly connected to the inner wall of the motor housing, and a plurality of output holes are formed on the inner side of the outer wall of the rotating shaft corresponding to the hollow disk and are connected to the first cavity.

[0014] Preferably, the motor housing and the connecting plate are provided with a plurality of cooling channels which are connected to the hollow disk, the outer wall of the motor housing is fixedly connected to a storage shell, a storage space is formed between the storage shell and the motor housing and is connected to the cooling channels.

[0015] Preferably, a water pump is fixedly connected to the outer wall of the storage shell, the water pump and the storage shell are connected by a pipeline, the water pump and the third cavity are connected by a pipeline and penetrate the fixed column and the motor housing, and a plurality of semiconductor refrigeration plates are fixedly connected to the outer wall of the storage shell.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Through the setting adjustment mechanism, the air gap between the rotor and the stator can be adjusted, which can optimize the transfer path of the magnetic field between the stator and the rotor, reduce magnetic resistance and energy loss, thereby improving the efficiency of the motor, adapting it to different load requirements, and enabling the motor to achieve optimal performance when high output is required, and can reduce mechanical vibration and noise;

[0018] 2. The limit mechanism can be used to limit the gap after adjustment to prevent the rotor from loosening during use, thereby avoiding affecting the gap after adjustment and improving stability;

[0019] 3. Through the cooling mechanism, the stator and rotor can be cooled synchronously, so as to directly absorb and take away the heat generated by the stator and rotor during operation, significantly reduce their operating temperature, and help reduce the heat loss of the motor, thereby improving the efficiency of the motor, and can reduce the thermal stress of the stator and rotor caused by temperature changes, thereby reducing the fatigue and wear of the components and extending the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall schematic diagram of a compact brushless motor of the present invention;

[0021] Figure 2 A top view from another perspective of a compact brushless motor of the present invention;

[0022] Figure 3 A cross-sectional view of a storage housing of a compact brushless motor of the present invention;

[0023] Figure 4 A cross-sectional view of a storage case and a motor housing of a compact brushless motor of the present invention;

[0024] Figure 5 A cross-sectional view of a hollow disk and a rotor of a compact brushless motor of the present invention;

[0025] Figure 6A compact brushless motor of the present invention Figure 5 Enlarged view of point A in the middle;

[0026] Figure 7 A cross-sectional view of a rotating shaft of a compact brushless motor of the present invention;

[0027] Figure 8 A compact brushless motor of the present invention Figure 7 Enlarged view of point B in the middle;

[0028] Fig. 9 A cross-sectional view of an adjustment ring of a compact brushless motor of the present invention;

[0029] Fig.10 The figure is a cross-sectional view of a fixing sleeve of a compact brushless motor of the present invention.

[0030] In the figure: 1. storage shell; 2. end cover; 3. rotating shaft; 4. semiconductor refrigeration plate; 5. water pump; 6. motor housing; 7. cooling channel; 8. connecting column; 9. limiting plate; 10. adjusting ring; 11. fixing ring; 12. fixing column; 13. stator; 14. hollow disk; 15. rotor; 16. connecting plate; 17. moving ring; 18. pushing ring; 19. output hole; 20. first cavity; 21. circular groove one; 22. fixing cylinder; 23. sliding groove; 24. second cavity; 25. connecting rod; 26. third cavity; 27. sliding block; 28. connecting hole; 29. ​​circular groove two; 30. through hole; 31. fixing cone; 32. threaded rod; 33. groove; 34. polygonal column; 35. fixing sleeve; 36. tension spring; 37. square column; 38. polygonal groove. DETAILED DESCRIPTION

[0031] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0032] like Figure 1-Figure 10A compact brushless motor shown in the figure comprises a motor housing 6, one end of the motor housing 6 is fixedly connected to an end cover 2 by bolts, the inner wall of the motor housing 6 is rotatably connected to a rotating shaft 3 and penetrates the end cover 2, the inner wall of the motor housing 6 is fixedly connected to a stator 13, and the motor housing 6 and the rotating shaft 3 are provided with an adjusting mechanism, a limiting mechanism and a cooling mechanism. The distance between the stator 13 and the rotor 15 can be adjusted by the provided adjusting mechanism, so as to improve the efficiency of the motor, and to be suitable for different load requirements, so that the motor can achieve the best performance when high output is required, and can also reduce mechanical vibration and noise, the provided limiting mechanism can limit the adjusting mechanism to ensure stability after adjustment, and the provided cooling mechanism can reduce the heat generated by the rotor 15 and the stator 13 during operation, thereby reducing the heat loss of the motor;

[0033] like Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the adjustment mechanism includes slide grooves 23 provided on both sides of the outer wall of the rotating shaft 3, the number of the slide grooves 23 is set to four groups, each group of slide grooves 23 is connected through a connecting hole 28, the inner wall of each group of slide grooves 23 is slidably connected with a slider 27, each group of sliders 27 is fixedly connected with a connecting rod 25, one end of the outer side of the two groups of sliders 27 is fixedly connected with a moving ring 17, the four sides of the outer wall of the two moving rings 17 are rotatably connected with a connecting plate 16, one end of each group of connecting plates 16 is rotatably connected with a rotor 15, and each group of rotors 1 5, circular grooves 21 are symmetrically opened at one end of the inner side, and a fixing cylinder 22 is arranged on the inner wall of each group of circular grooves 21. Each group of fixing cylinders 22 is fixedly connected to the rotating shaft 3. The moving ring 17, the slider 27 and the connecting rod 25 move to change the inclination angle of the connecting plate 16, so that the rotor 15 moves outward and changes the distance between the rotor 15 and the stator 13. The sliders 27 on both sides can be moved synchronously through the connecting rod 25, and the rotor 15 is limited by the fixing cylinder 22 so that it can only move outward.

[0034] like Figure 4 , Fig. 9 As shown, the limiting mechanism includes a fixed column 12 fixedly connected to one end of the motor housing 6, an adjusting ring 10 is provided on the outer wall of the fixed column 12, and grooves 33 are symmetrically opened on the inner wall of the adjusting ring 10. The inner walls of the two grooves 33 are threaded with threaded rods 32, and the two threaded rods 32 are fixedly connected to a fixed cone 31 at one end close to each other. The threaded rod 32 on the adjusting ring 10 can rotate with the fixed cone 31, so that the fixed cone 31 can be closely abutted against the outer wall of the fixed column 12, and the scale line on the fixed column 12 can display the moving distance, so that the moving distance of the rotor 15 can be understood.

[0035] like Figure 5 , Figure 6As shown, one end of the adjusting ring 10 close to the motor housing 6 is fixedly connected with a plurality of connecting columns 8 and penetrates the motor housing 6, and the other end of the plurality of motor housings 6 is fixedly connected with a pushing ring 18, and the pushing ring 18 is rotatably connected with one of the moving rings 17, and the fixing cone 31 is tightly against the outer wall of the fixing column 12 for limiting and fixing the moving ring 17 to prevent loosening. The adjusting ring 10 pushes the connecting column 8 to move, thereby moving the pushing ring 18, and then moving the moving ring 17 on one side, and adjusting the gap between the rotor 15 and the stator 13.

[0036] like Figure 2 , Figure 4 , Fig.10 As shown, the limiting mechanism also includes a fixing ring 11 fixedly connected to the end of the adjusting ring 10 away from the motor housing 6, and the outer wall of the fixing ring 11 is symmetrically fixedly connected with a fixing sleeve 35, and the inner walls of the two fixing sleeves 35 are both provided with square columns 37, and tension springs 36 are fixedly connected between the two groups of square columns 37 and the fixing sleeves 35. The square columns 37 can be moved in the fixing sleeves 35 by the elastic action of the tension springs 36, and the outer wall of the fixing ring 11 is provided with fixing columns 12.

[0037] like Fig.10 As shown, two square columns 37 are fixedly connected to the limiting plate 9 at one end away from each other, and two limiting plates 9 are provided with polygonal grooves 38 on one side of the end close to each other. The inner walls of the two polygonal grooves 38 are provided with polygonal columns 34, and the two polygonal columns 34 are fixedly connected to the two threaded rods 32. The threaded rods 32 can be limited by the cooperation of the polygonal grooves 38 and the polygonal columns 34, so as to prevent the threaded rods 32 from loosening and ensure the stability of the limit.

[0038] like Figure 5 , Figure 7 , Figure 8 As shown, the cooling mechanism includes a first cavity 20, a second cavity 24 and a third cavity 26 opened inside the rotating shaft 3, and a circular groove 29 is opened on the inner side of the outer wall of the rotating shaft 3 corresponding to the fixed cylinder 22, and each circular groove 29 is respectively connected with the first cavity 20, the second cavity 24 and the third cavity 26 through a through hole 30. The circular grooves 1 21 on each group of rotors 15 are connected, and a connecting channel is formed between the first cavity 20, the second cavity 24, the third cavity 26 and the circular grooves 29 to ensure the flow of the coolant.

[0039] like Figure 4 , Figure 5As shown, the inner wall of the motor housing 6 is fixedly connected with a hollow disk 14, the outer wall of the rotating shaft 3 is provided with a plurality of output holes 19 on the inner side corresponding to the hollow disk 14 and is in communication with the first cavity 20, the motor housing 6 and the connecting plate 16 are provided with a plurality of cooling channels 7 in communication with the hollow disk 14, the outer wall of the motor housing 6 is fixedly connected with a storage shell 1, a storage space is formed between the storage shell 1 and the motor housing 6 and is in communication with the cooling channel 7. The coolant on the rotating shaft 3 can be guided into the cooling channel 7 through the hollow disk 14, so that the stator 13 can be cooled, and the coolant can be stored through the storage space between the storage shell 1 and the motor housing 6, so that the inside of the motor housing 6 can be cooled, so as to ensure that the inside of the brushless motor is always in a cooling state, and the inside of the brushless motor is in a low temperature state, thereby reducing the generation of heat.

[0040] like Figure 1 , Figure 2 , Figure 3 As shown, a water pump 5 is fixedly connected to the outer wall of the storage shell 1, the water pump 5 and the storage shell 1 are connected by a pipeline, the water pump 5 and the third cavity 26 are connected by a pipeline and penetrate the fixed column 12 and the motor housing 6, and a plurality of semiconductor cooling sheets 4 are fixedly connected to the outer wall of the storage shell 1. The coolant can be kept in a flowing state by the water pump 5, and then the coolant is cooled by the semiconductor cooling sheets 4 to ensure that the coolant is always in a low temperature state, so that the cooling process can be better performed.

[0041] Working principle: First, the fixed ring 11 is pushed to move with the connecting column 8, so that the pushing ring 18 can be moved. Due to the rotation of the pushing ring 18 and the moving ring 17 on one side, and with the cooperation of the connecting rod 25 and the slider 27, the moving rings 17 on both sides can be moved synchronously, so that the connecting plate 16 can be squeezed to change its inclination angle, so that the rotor 15 can be moved outward, and then the gap between the rotor 15 and the stator 13 can be changed, and the transmission path of the magnetic field between the stator 13 and the rotor 15 can be optimized, and the magnetic resistance and energy loss can be reduced, so as to improve the efficiency of the motor, adapt it to different load requirements, and make the motor reach the best performance when high output is required;

[0042] Furthermore, the rotating polygonal column 34 simultaneously rotates the threaded rod 32, and the fixing cone 31 is closely fitted on the outer wall of the fixing column 12. Then, the limit plate 9 can be moved toward the direction close to the adjustment ring 10 through the reset action of the tension spring 36, and the polygonal groove 38 is stuck on the outer wall of the polygonal column 34, so as to limit the polygonal column 34, thereby preventing the adjustment ring 10 from loosening, and then ensuring the gap after adjustment, and improving stability.

[0043] Furthermore, starting the water pump 5 can extract the coolant between the storage shell 1 and the motor housing 6, and transport it into the third cavity 26 through the pipeline, and then transport it into the circular groove 29 on one side through the through hole 30 in the third cavity 26 and flow into the inside of the rotor 15 on one side through the fixed tube 22. Since the circular groove 1 21 in the rotor 15 is connected, the coolant can flow into the second cavity 24, and can also flow through the inside of the rotor 15 on the other side, and finally enter the first cavity 20, and through the output hole 19, the coolant flows into the inside of the hollow disk 14, and then flows into the cooling channel 7 and cools the stator 13, and then flows back into the storage shell 1 and the motor housing 6, so that the coolant circulates, and at the same time, the coolant is cooled by the semiconductor refrigeration plate 4 to ensure the low temperature state of the coolant, which is beneficial to reduce their operating temperature, and helps to reduce the heat loss of the motor, and can reduce the thermal stress of the stator 13 and the rotor 15 caused by temperature changes.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A compact brushless motor, comprising a motor housing (6), one end of the motor housing (6) being fixedly connected to an end cover (2) by means of bolts, an inner wall of the motor housing (6) being rotatably connected to a rotating shaft (3) and penetrating the end cover (2), and an inner wall of the motor housing (6) being fixedly connected to a stator (13), characterized in that: The motor housing (6) and the rotating shaft (3) are provided with an adjustment mechanism, a limit mechanism and a cooling mechanism; The adjustment mechanism comprises slide grooves (23) provided on both sides of the outer wall of the rotating shaft (3), the number of the slide grooves (23) is set to four groups, each group of the slide grooves (23) is connected through a connecting hole (28), the inner wall of each group of the slide grooves (23) is slidably connected with a slider (27), each group of the sliders (27) is fixedly connected with a connecting rod (25), one end of the outer side of the two groups of sliders (27) is fixedly connected with a moving ring (17), and the four sides of the outer wall of the two moving rings (17) are rotatably connected with a connecting plate (16), One end of each group of the connecting plates (16) is rotatably connected to a rotor (15), one end of the inner side of each group of the rotors (15) is symmetrically provided with a circular groove (21), the inner wall of each group of the circular groove (21) is provided with a fixed cylinder (22), and each group of the fixed cylinder (22) is fixedly connected to the rotating shaft (3). The moving ring (17), the slider (27) and the connecting rod (25) move to change the inclination angle of the connecting plate (16), thereby moving the rotor (15) outward and changing the distance between the rotor (15) and the stator (13).

2. A compact brushless motor according to claim 1, characterized in that: The limiting mechanism comprises a fixing column (12) fixedly connected to one end of the motor housing (6); an adjusting ring (10) is arranged on the outer wall of the fixing column (12); grooves (33) are symmetrically provided on the inner wall of the adjusting ring (10); threaded rods (32) are threadedly penetrated through the inner walls of two grooves (33); and a fixing cone (31) is fixedly connected to one end of the two threaded rods (32) close to each other.

3. A compact brushless motor according to claim 2, characterized in that: One end of the adjustment ring (10) close to the motor housing (6) is fixedly connected to a plurality of connection columns (8) and penetrates the motor housing (6); the other end of the motor housing (6) is fixedly connected to a push ring (18); the push ring (18) is rotatably connected to one of the moving rings (17); the fixed cone (31) is tightly abutted against the outer wall of the fixed column (12) to limit and fix the moving ring (17) to prevent loosening.

4. A compact brushless motor according to claim 3, characterized in that: The limiting mechanism further comprises a fixing ring (11) fixedly connected to an end of the adjusting ring (10) away from the motor housing (6); a fixing sleeve (35) is symmetrically fixedly connected to the outer wall of the fixing ring (11); square columns (37) are arranged on the inner walls of the two fixing sleeves (35); and tension springs (36) are fixedly connected between the two groups of square columns (37) and the fixing sleeves (35).

5. A compact brushless motor according to claim 4, characterized in that: The two square columns (37) are fixedly connected to a limit plate (9) at one end away from each other, and the two limit plates (9) are provided with a polygonal groove (38) on one side of the end close to each other. The inner walls of the two polygonal grooves (38) are provided with polygonal columns (34), and the two polygonal columns (34) are fixedly connected to the two threaded rods (32) respectively.

6. A compact brushless motor according to claim 1, characterized in that: The cooling mechanism comprises a first cavity (20), a second cavity (24) and a third cavity (26) which are opened inside the rotating shaft (3); a circular groove (29) is opened on the inner side of the outer wall of the rotating shaft (3) corresponding to the fixed cylinder (22); each of the circular grooves (29) is respectively connected to the first cavity (20), the second cavity (24) and the third cavity (26) through a through hole (30).

7. A compact brushless motor according to claim 6, characterized in that: The inner wall of the motor housing (6) is fixedly connected to a hollow disk (14), and the outer wall of the rotating shaft (3) is provided with a plurality of output holes (19) on the inner side corresponding to the hollow disk (14) and is in communication with the first cavity (20).

8. A compact brushless motor according to claim 7, characterized in that: The motor housing (6) and the connecting plate (16) are provided with a plurality of cooling channels (7) which are in communication with the hollow disk (14); the outer wall of the motor housing (6) is fixedly connected with a storage shell (1); a storage space is formed between the storage shell (1) and the motor housing (6) and is in communication with the cooling channels (7).

9. A compact brushless motor according to claim 8, characterized in that: A water pump (5) is fixedly connected to the outer wall of the storage shell (1); the water pump (5) and the storage shell (1) are connected via a pipeline; the water pump (5) and the third cavity (26) are connected via a pipeline and penetrate the fixed column (12) and the motor housing (6); and a plurality of semiconductor cooling plates (4) are fixedly connected to the outer wall of the storage shell (1).

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