A compact brushless motor

Abstract

The application 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 bolts, a rotating shaft is rotationally connected to the inner wall of the motor shell and penetrates through the end cover, a stator is fixedly connected to the inner wall of the motor shell, and 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 which are arranged on the outer walls of the rotating shaft on both sides, the number of the sliding grooves is four, the sliding grooves are communicated through communicating holes, sliding blocks are slidably connected to the inner walls of the sliding grooves, connecting rods are fixedly connected between the sliding blocks, and moving rings are fixedly connected to one ends of the outer sides of the sliding blocks; the application can adjust the air gap between the rotor and the stator, can optimize the transmission path of the magnetic field between the rotor and the stator, can reduce the magnetic resistance and energy loss, and can improve the efficiency of the motor.

Description

Technical Field

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

[0002] Brushless motors typically use a winding method that connects multiple coils in parallel to reduce losses caused by coil impedance. The winding coils wound on the stator core are connected together via a busbar, which consists of an injection-molded insulating bracket and multiple connecting conductive plates embedded in the bracket. The connecting conductive plates are equipped with multiple terminal blocks distributed along the circumference of the insulating bracket. The number of wire ends required to connect the coils wound on the motor's split core is twice the number of stator slots. The number of terminals on the busbar corresponds to the number of wire ends in the stator coils. The compact brushless motor is a brushless DC motor based on a new structural principle. It combines the technical features of brushless motors with a compact structural design. The compact design means that the motor maintains high performance while being smaller and lighter, making it easier to install and use in limited spaces.

[0003] Currently, existing technologies set the stator-rotor air gap to a fixed value, making it impossible to dynamically adjust the magnetic circuit layout. This limitation increases magnetic resistance, causing energy loss, and thus reduces the efficiency of the motor, making it difficult to adapt to diverse load requirements. In particular, in applications requiring high output, the motor often fails to achieve optimal operating conditions.

[0004] In addition, attempts to adjust the stator-rotor air gap may cause additional heat generation, exacerbating the heat loss of the motor and further affecting the motor efficiency. At the same time, excessive heat will also cause increased thermal stress between the stator and rotor, accelerating component fatigue and wear, and shortening 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 objectives, the present invention adopts the following technical solution: a compact brushless motor, comprising a motor housing, one end of the motor housing being fixedly connected to an end cap by bolts, an inner wall of the motor housing being rotatably connected to a rotating shaft that passes through the end cap, a stator being fixedly connected to the inner wall of the motor housing, and an adjustment mechanism, a limit mechanism, and a cooling mechanism being provided on the motor housing and the rotating shaft;

[0007] The adjusting mechanism comprises a sliding groove opened on both sides of the rotating shaft outer wall, the number of the sliding groove is four groups, each group of the sliding grooves is communicated through the communication hole, each group of the sliding groove inner wall is slidably connected with a sliding block, each group of the sliding blocks is fixedly connected with a connecting rod, one end of the sliding block outer side is fixedly connected with a moving ring, the outer wall of the two moving rings is rotatably connected with a connecting plate, one end of each group of the connecting plates is rotatably connected with a rotor, one end of each group of the rotor inner side is symmetrically provided with a circular groove one, the inner wall of each group of the circular groove one is provided with a fixed cylinder, each group of the fixed cylinder is fixedly connected with the rotating shaft, the moving ring, the sliding block and the connecting rod move to change the inclination angle of the connecting plate, so that the rotor moves outward, and the distance between the rotor and the stator is changed.

[0008] Preferably, the limiting mechanism comprises a fixed column fixedly connected to one end of the motor shell, the outer wall of the fixed column is provided with an adjusting ring, the inner wall of the adjusting ring is symmetrically provided with a groove, the inner wall of the two grooves is threaded through a threaded rod, and one end of the two threaded rods away from each other is fixedly connected with a fixed cone.

[0009] Preferably, the adjusting ring is fixedly connected with a plurality of connecting columns at one end close to the motor shell and penetrates the motor shell, a plurality of the other end of the motor shell is fixedly connected with a push ring, the push ring is rotatably connected with one of the moving rings, and the fixed cone is tightly abutted on the outer wall of the fixed column for limiting and fixing the moving ring to prevent loosening.

[0010] Preferably, the limiting mechanism further comprises a fixed ring fixedly connected to one end of the adjusting ring away from the motor shell, the outer wall of the fixed ring is symmetrically fixedly connected with a fixed sleeve, the inner wall of the two fixed sleeves is provided with a square column, and the two groups of square columns and the fixed sleeve are fixedly connected with a tension spring.

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

[0012] Preferably, the cooling mechanism comprises a first cavity, a second cavity and a third cavity opened in the rotating shaft, the rotating shaft outer wall is provided with a circular groove two on the inner side corresponding to the fixed cylinder, and each circular groove two is communicated with the first cavity, the second cavity and the third cavity through the through hole respectively.

[0013] Preferably, the inner wall of the motor shell is fixedly connected with a hollow disc, the outer wall of the rotating shaft is provided with a plurality of output holes corresponding to the inner side of the hollow disc and communicated with the first cavity.

[0014] Preferably, a plurality of cooling flow channels are arranged on the motor housing and the connecting plate and communicated with the hollow disc, and a storage shell is fixedly connected to the outer wall of the motor housing, and a storage space is formed between the storage shell and the motor housing and communicated with the cooling flow 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 through a pipeline, the water pump and the third cavity are communicated through the pipeline and penetrate the fixed column and the motor housing, and a plurality of semiconductor refrigerating fins are fixedly connected to the outer wall of the storage shell.

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

[0017] 1. By arranging the adjusting mechanism, the air gap between the rotor and the stator can be adjusted, the transmission path of the magnetic field between the rotor and the stator can be optimized, the magnetic resistance and energy loss can be reduced, the efficiency of the motor can be improved, the motor can adapt to different load requirements, the motor can achieve optimal performance when high output is required, and mechanical vibration and noise can be reduced.

[0018] 2. By arranging the limiting mechanism, the gap after adjustment can be limited, the rotor can be prevented from loosening during use, the gap after adjustment can be avoided, and the stability can be improved.

[0019] 3. By arranging the cooling mechanism, the stator and the rotor can be cooled synchronously, the heat generated by the stator and the rotor during operation can be directly absorbed and removed, the working temperature of the stator and the rotor can be significantly reduced, the heat loss of the motor can be reduced, the efficiency of the motor can be improved, the thermal stress of the stator and the rotor due to temperature change can be reduced, the fatigue and wear degree of the components can be reduced, and the service life of the motor can be prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a whole schematic view of the compact brushless motor of the present application.

[0021] Figure 2 It is another perspective view of the compact brushless motor of the present application.

[0022] Figure 3 It is a sectional view of the storage shell of the compact brushless motor of the present application.

[0023] Figure 4 It is a sectional view of the storage shell and the motor housing of the compact brushless motor of the present application.

[0024] Figure 5 It is a sectional view of the hollow disc and the rotor of the compact brushless motor of the present application.

[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 according to 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] Figure 9 A cross-sectional view of an adjustment ring of a compact brushless motor according to the present invention;

[0029] Figure 10 This is a cross-sectional view of a fixing sleeve of a compact brushless motor according to 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. limit 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 1; 22. fixing cylinder; 23. slide groove; 24. second cavity; 25. connecting rod; 26. third cavity; 27. slider; 28. connecting hole; 29. ​​circular groove 2; 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 intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0032] like Figures 1-10The illustrated one kind is compact brushless motor, including motor shell 6, one end of motor shell 6 is fixedly connected with end cover 2 by bolt, the inner wall of motor shell 6 is rotatably connected with the shaft 3 and penetrates end cover 2, the inner wall of motor shell 6 is fixedly connected with stator 13, motor shell 6 and shaft 3 are provided with adjusting mechanism, limiting mechanism and cooling mechanism, the distance between stator 13 and rotor 15 can be adjusted by the adjusting mechanism, so that the efficiency of the motor can be improved, and it is suitable for different load requirements, so that the motor can achieve optimal performance when high output is required, and mechanical vibration and noise can also be reduced, the limiting mechanism can be positioned to the adjusting mechanism, to ensure the stability after adjustment, the cooling mechanism can reduce the heat generated by rotor 15 and stator 13 during operation, reduce the heat loss of the motor;

[0033] As Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 The adjusting mechanism includes the sliding groove 23 opened on the outer wall of the shaft 3, the number of the sliding groove 23 is set to four groups, each group of sliding groove 23 is communicated through the communication hole 28, each group of sliding groove 23 is slidably connected with the sliding block 27, each group of sliding block 27 is fixedly connected with the connecting rod 25, one end of the sliding block 27 is fixedly connected with the moving ring 17, the outer wall of the two moving rings 17 is rotatably connected with the connecting plate 16, one end of each connecting plate 16 is rotatably connected with the rotor 15, one end of each rotor 15 is symmetrically provided with a circular groove 21, each circular groove 21 is provided with a fixed cylinder 22, each fixed cylinder 22 is fixedly connected with the shaft 3, the moving ring 17, the sliding block 27 and the connecting rod 25 change the inclination angle of the connecting plate 16, so that the rotor 15 moves outward, and the distance between the rotor 15 and the stator 13 is changed, the connecting rod 25 can make the sliding block 27 on both sides move synchronously, and the fixed cylinder 22 limits the rotor 15, so that it can only move outward.

[0034] As Figure 4 、 Figure 9 The limiting mechanism includes the fixed column 12 fixedly connected to one end of the motor shell 6, the fixed column 12 is provided with an adjusting ring 10, the adjusting ring 10 is symmetrically provided with a groove 33 in the inner wall, the two grooves 33 are threaded through the threaded rod 32 in the inner wall, and the two threaded rods 32 are fixedly connected with the fixed cone 31 at the 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 tightly abuts on 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 known.

[0035] As Figure 5 、 Figure 6As shown, the end of the adjustment ring 10 near the motor housing 6 is fixedly connected to multiple connecting posts 8 and extends through 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 movable rings 17. The fixed cone 31 tightly abuts the outer wall of the fixed post 12 to limit and fix the movable ring 17 to prevent loosening. By pushing the connecting post 8 and moving it, the adjustment ring 10 moves the push ring 18, which in turn moves the movable ring 17 on one side, thereby adjusting the gap between the rotor 15 and the stator 13.

[0036] like Figure 2 、 Figure 4 、 Figure 10 As shown, the limiting mechanism also includes a fixing ring 11 fixedly connected to the end of the adjustment ring 10 away from the motor housing 6. The outer wall of the fixing ring 11 is symmetrically fixedly connected to the fixing sleeves 35. The inner walls of the two fixing sleeves 35 are each provided with square columns 37. Tension springs 36 are fixedly connected between the two sets of square columns 37 and the fixing sleeves 35. The elastic action of the tension springs 36 can move the square columns 37 within the fixing sleeves 35. The fixing ring 11 is provided with the outer wall of the fixing columns 12.

[0037] like Figure 10 As shown, the two square posts 37 are fixedly connected to the limit plate 9 at their ends facing away from each other. The two limit plates 9 are each provided with a polygonal groove 38 on one side of the ends facing each other. The inner walls of the two polygonal grooves 38 are provided with polygonal posts 34. The two polygonal posts 34 are respectively fixedly connected to the two threaded rods 32. The polygonal grooves 38 and the polygonal posts 34 cooperate with each other to limit the threaded rods 32, thereby preventing the threaded rods 32 from loosening and ensuring 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 defined within the rotating shaft 3. A second circular groove 29 is defined on the outer wall of the rotating shaft 3, corresponding to the inner side of the fixed cylinder 22. Each second circular groove 29 is connected to the first cavity 20, the second cavity 24, and the third cavity 26 via a through hole 30. The first circular groove 21 on each set of rotors 15 is interconnected, forming a connecting channel between the first cavity 20, the second cavity 24, the third cavity 26, and the second circular groove 29, ensuring the flow of coolant.

[0039] like Figure 4 、 Figure 5As shown, a hollow disk 14 is fixedly connected to the inner wall of the motor housing 6. A plurality of output holes 19 are formed on the outer wall of the rotating shaft 3, corresponding to the inner side of the hollow disk 14, and are connected to the first cavity 20. A plurality of cooling channels 7 are formed on the motor housing 6 and the connecting plate 16 and are connected to the hollow disk 14. A storage shell 1 is fixedly connected to the outer wall of the motor housing 6, and a storage space is formed between the storage shell 1 and the motor housing 6 and is connected to the cooling channels 7. Coolant on the rotating shaft 3 can be guided into the cooling channels 7 through the hollow disk 14, thereby cooling the stator 13. Coolant can also be stored in the storage space between the storage shell 1 and the motor housing 6, thereby cooling the interior of the motor housing 6, ensuring that the entire interior of the brushless motor is always cooled, keeping the interior of the brushless motor at a low temperature, and reducing heat generation.

[0040] like Figure 1 、 Figure 2 、 Figure 3 As shown, a water pump 5 is fixedly connected to the outer wall of the storage housing 1. The water pump 5 and the storage housing 1 are connected by a pipe. The water pump 5 and the third cavity 26 are connected by a pipe that passes through the fixing column 12 and the motor housing 6. A plurality of semiconductor cooling fins 4 are fixedly connected to the outer wall of the storage housing 1. The water pump 5 keeps the coolant in a flowing state, and the semiconductor cooling fins 4 cool the coolant, ensuring that the coolant is always at a low temperature, thereby achieving better cooling.

[0041] Working principle: First, the fixed ring 11 is pushed to move the connecting column 8, thereby moving the pushing ring 18. Due to the rotation of the pushing ring 18 and the movable ring 17 on one side, and with the cooperation of the connecting rod 25 and the slider 27, the movable rings 17 on both sides can move synchronously, thereby squeezing the connecting plate 16 to change its tilt angle, thereby moving the rotor 15 outward, and further changing the gap between the rotor 15 and the stator 13. The transmission path of the magnetic field between the stator 13 and the rotor 15 can be optimized, reducing magnetic resistance and energy loss, thereby improving the efficiency of the motor, making it adaptable to different load requirements, and enabling the motor to achieve optimal 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 tightly fitted on the outer wall of the fixing column 12. Then, the restoring action of the tension spring 36 can move the limiting plate 9 toward the adjustment ring 10, and the polygonal groove 38 is stuck on the outer wall of the polygonal column 34, completing the position limitation of the polygonal column 34, thereby preventing the adjustment ring 10 from loosening, thereby ensuring the gap after adjustment and improving stability.

[0043] Further, the water pump 5 can draw the cooling liquid between the storage shell 1 and the motor shell 6, and deliver it into the third cavity 26 through the pipe, and then into the circular groove two 29 on one side through the through hole 30 in the third cavity 26, and into the inside of the one-side rotor 15 through the fixed cylinder 22. Since the circular groove one 21 in the rotor 15 is connected, the cooling liquid can flow into the second cavity 24, and also flow through the inside of the other-side rotor 15, and finally into the first cavity 20, and then flow into the inside of the hollow disc 14 through the output hole 19, and then flow into the cooling flow channel 7 and cool the stator 13, and then flow back into the storage shell 1 and the motor shell 6, so that the cooling liquid circulates, and is cooled by the semiconductor refrigeration sheet 4, so as to ensure the low temperature of the cooling liquid, reduce the working temperature, reduce the heat loss of the motor, and reduce the thermal stress of the stator 13 and the rotor 15 due to temperature change.

[0044] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only the principles of the present application. Various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the claimed present application. The scope of protection required by the present application is defined by the appended 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 passing through the end cover (2), and a stator (13) being fixedly connected to the inner wall of the motor housing (6), characterized in that: The motor housing (6) and the rotating shaft (3) are provided with an adjusting mechanism, a limiting mechanism and a cooling mechanism; 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 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 connecting plates (16) is rotatably connected to a rotor (15), and one end of the inner side of each group of rotors (15) is symmetrically provided with a circular groove (21). The inner wall of each group of circular grooves (21) is provided with a fixed cylinder (22), and each group of fixed cylinders (22) is fixedly connected to the rotating shaft (3). The movable 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 provided 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 passed through the inner walls of the two grooves (33); and the two threaded rods (32) are fixedly connected to a fixing cone (31) at one end close to each other.

3. A compact brushless motor according to claim 2, characterized in that: One end of the adjusting ring (10) close to the motor housing (6) is fixedly connected to a plurality of connecting columns (8) and passes through the motor housing (6); the other end of the plurality of motor housings (6) is fixedly connected to a pushing ring (18); the pushing ring (18) is rotatably connected to one of the moving rings (17); the fixing cone (31) is tightly abutted against the outer wall of the fixing 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 one 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 provided 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 limiting plate (9) at one end away from each other, and the two limiting 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. The 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. The compact brushless motor according to claim 7, characterized in that: A plurality of cooling channels (7) are provided on the motor housing (6) and the connecting plate (16) and are in communication with the hollow disk (14). A storage shell (1) is fixedly connected to the outer wall of the motor housing (6). 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 pass through the fixed column (12) and the motor housing (6); and a plurality of semiconductor refrigeration plates (4) are fixedly connected to the outer wall of the storage shell (1).

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