Hollow cup motor

Abstract

This invention provides a coreless motor, comprising a stator and a mover; the stator includes a housing, a bottom cover, a top cover, a winding assembly, and a flexible circuit board; the mover includes a shaft and a magnet; the winding assembly includes a coil fixed to the housing; the flexible circuit board is arranged perpendicular to the axial direction of the shaft; the bottom cover includes a bottom cover body, a first shaft hole, a first clearance groove, and a through hole; one end of the coil near the bottom cover is received in the first clearance groove, and the lead ends of the coil pass through the through hole and extend to the flexible circuit board, and are fixedly electrically connected to fixed solder points on the flexible circuit board. The coreless motor of this invention can shorten the overall length of the coreless motor, or improve the magnetic circuit performance of the coreless motor with the same overall length. Furthermore, it can increase the axial length of the coil along the shaft, resulting in better driving performance.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more particularly to a hollow cup motor. Background Technology

[0002] Coreless motors have been widely used in the fields of electric motors, generators, and intelligent devices due to their high efficiency and energy-saving advantages.

[0003] The hollow cup motor in related technologies mainly includes a stator and a mover. The stator includes a housing, a bottom cover and a top cover fixed to both ends of the housing, a winding fixed to the inner circumference of the housing, and a flexible circuit board fixed to the housing. The mover includes a shaft that passes through the bottom cover and extends through the top cover, and a magnet fixed to the outer circumference of the shaft. The winding includes coils spaced apart from the magnet, and the shaft is rotatably connected to the bottom cover and the top cover, respectively.

[0004] Although the hollow cup motor in the related technology can rotate, due to the limitations of the internal wiring of the hollow cup motor, its flexible circuit board needs to be arranged along the axial direction of the hollow cup motor. This will increase the overall length of the hollow cup motor and make it impossible to miniaturize. In addition, the bottom cover also needs to be fixed to one end of the housing, which will limit the length of the coil along the axial direction of the hollow cup motor.

[0005] Therefore, it is necessary to provide a new hollow cup motor to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a new type of hollow cup motor to solve the problems of excessive overall length and limited coil arrangement length in related technologies.

[0007] To achieve the above objectives, the present invention provides a hollow cup motor, comprising a stator and a mover, the stator being used to drive the mover to rotate; the stator comprising a hollow housing with openings at both ends, a bottom cover and a top cover fixed to opposite ends of the housing, a winding assembly fixed to the inner circumference of the housing, and a flexible circuit board fixed to the bottom cover on the side away from the top cover; the mover comprising a rotating shaft extending from the housing and rotatably supported at both ends by the bottom cover and the top cover respectively, and a magnet fixed to the outer circumference of the rotating shaft; the winding assembly comprising a coil fixed to the inner circumference of the housing, the coil surrounding the outer circumference of the magnet and spaced apart from the magnet, and the flexible circuit board being arranged perpendicular to the axial direction of the rotating shaft;

[0008] The bottom cover includes a bottom cover body that covers and is fixed to one end of the housing and partially extends into the housing; a first pivot hole that penetrates the bottom cover body along the axial direction of the pivot; a first relief groove that is recessed and annular from the side of the bottom cover body near the top cover towards the side away from the top cover; and a through hole that penetrates from the bottom side of the first relief groove to the side of the bottom cover body away from the top cover. The first relief groove is arranged around the first pivot hole. One end of the pivot is inserted into the first pivot hole and forms a rotatable connection with the bottom cover body. The end of the coil near the bottom cover is received in the first relief groove. The lead ends of the coil pass through the through hole and extend to the flexible circuit board and are fixedly electrically connected to the fixed solder joints on the flexible circuit board.

[0009] Preferably, the mover further includes a ring-shaped Hall magnet, which is sleeved and fixed to one end of the rotating shaft near the bottom cover; the stator further includes a magnetic angle position sensor fixed to the flexible circuit board, which is directly opposite to and spaced apart from the Hall magnet along the axial direction of the rotating shaft, and is used to detect the rotation angle of the Hall magnet.

[0010] Preferably, the bottom cover further includes a receiving groove recessed from the side of the bottom cover body away from the top cover toward the top cover; the end of the rotating shaft away from the top cover passes through the first rotating shaft hole and extends into the receiving groove, and the Hall magnet is received in the receiving groove; the flexible circuit board includes a first plate and a second plate arranged parallel to each other and spaced apart, and a third plate connecting the first plate and the second plate and perpendicular to the first plate, the first plate being closer to the top cover than the second plate, and the fixing solder point being located on the side of the first plate away from the top cover; the first plate is annular and fixed to the bottom wall of the receiving groove, the first plate is arranged around the Hall magnet and spaced apart from each other, the second plate is fixed to the side of the bottom cover body away from the top cover and extends outward from the bottom cover body, the third plate is received in the receiving groove, and the magnetic angle position sensor is fixed to the side of the second plate near the first plate.

[0011] Preferably, the bottom cover further includes a recessed groove formed by the side of the bottom cover body away from the top cover and inward toward the top cover and surrounding the receiving groove, and a fixing notch formed through a portion of the sidewall of the recessed groove, the recessed groove being in communication with the receiving groove; the side of the second plate body near the first plate body is fixed to the bottom of the recessed groove, and the second plate body extends outward toward the bottom cover body through the fixing notch.

[0012] Preferably, the hollow cup motor further includes a reinforcing plate fixed to the bottom cover body on the side away from the top cover; the side of the reinforcing plate near the top cover is fixed to the side of the second plate body away from the first plate body.

[0013] Preferably, the winding assembly includes a plurality of coils arranged at circumferential intervals along the housing, the plurality of coils collectively surrounding the magnet; the number of through holes is the same as the number of coils; the periphery of the first plate is provided with a plurality of clearance notches that pass through it and are the same number as the number of through holes, the plurality of clearance notches being arranged in a one-to-one correspondence with the plurality of through holes; the two leads of each coil sequentially pass through one of the through holes and the clearance notch corresponding to the through hole and are welded to the fixed solder joint.

[0014] Preferably, the top cover includes a top cover body fixed to the other end of the housing and partially extending into the housing, a second pivot hole penetrating the top cover body along the axial direction of the pivot, and a second relief groove recessed from the side of the top cover body near the bottom cover in a direction away from the bottom cover and in an annular shape; the second relief groove is arranged around the second pivot hole, the other end of the pivot is inserted into the second pivot hole and forms a rotatable connection with the top cover body, and the end of the coil near the top cover is received in the second relief groove.

[0015] Preferably, the stator further includes a first iron core and a second iron core that are fixed to the inner side of the housing and are hollow. The first iron core and the second iron core are coaxially arranged with the rotating shaft and are arranged along the axial direction of the rotating shaft and fixed to each other. The end of the first iron core away from the second iron core is fixed to the side of the bottom cover body near the top cover, and the end of the second iron core away from the first iron core is fixed to the side of the top cover body near the bottom cover. The coil is fixed to the inner circumference of both the first iron core and the second iron core.

[0016] Preferably, the hollow cup motor further includes a first bearing fixed in the first shaft hole, a first sealing ring arranged around the first bearing and fixed in the bottom cover body, a second bearing fixed in the second shaft hole, and a second sealing ring arranged around the second bearing and fixed in the top cover body; the shaft is rotatably connected to the bottom cover body through the first bearing, and the shaft is rotatably connected to the top cover body through the second bearing.

[0017] Preferably, the hollow cup motor further includes a helical spring and a bushing respectively sleeved on the rotating shaft; the two ends of the helical spring abut against the side of the first bearing near the top cover and the side of the magnet near the bottom cover respectively, and the two ends of the bushing are respectively fixed to the side of the second bearing near the bottom cover and the side of the magnet near the top cover.

[0018] Compared with related technologies, the hollow cup motor of this invention defines the flexible circuit board as being axially perpendicular to the rotating shaft. The bottom cover includes a bottom cover body that covers and is fixed to one end of the housing and partially extends into the housing, a first rotating shaft hole that penetrates the bottom cover body along the rotating shaft, a first annular relief groove that is recessed from the side of the bottom cover body near the top cover and moves away from the top cover, and a through hole that extends from the bottom side of the first relief groove to the side of the bottom cover body away from the top cover. The lead ends of the coil pass through the through hole and extend to the flexible circuit board and are fixedly electrically connected to the fixed solder points on the flexible circuit board. This allows the flexible circuit board to be arranged axially perpendicular to the rotating shaft and is not restricted by the internal wiring of the hollow cup motor, thereby shortening the overall length of the hollow cup motor to achieve miniaturization, or increasing the magnetic circuit arrangement space within the same overall length to improve magnetic circuit performance. In addition, the hollow cup motor of this invention also accommodates the end of the coil near the bottom cover in the first relief groove, which increases the arrangement length of the coil along the rotating shaft and improves its driving performance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0020] Figure 1 A three-dimensional structural schematic diagram of a hollow cup motor provided in an embodiment of the present invention;

[0021] Figure 2 This is a partial exploded view of the hollow cup motor provided in an embodiment of the present invention;

[0022] Figure 3 For along Figure 1 Sectional view of line AA in the middle;

[0023] Figure 4 This is a first-view perspective three-dimensional structural diagram of the bottom cover of the hollow cup motor provided in an embodiment of the present invention;

[0024] Figure 5 This is a second-view perspective three-dimensional structural diagram of the bottom cover of the hollow cup motor provided in an embodiment of the present invention.

[0025] Wherein: 100, Hollow cup motor; 1, Stator; 11, Housing; 12, Bottom cover; 121, Bottom cover body; 122, First clearance groove; 1221, Groove bottom side; 123, Perforation; 124, Receiving groove; 1241, Groove bottom wall; 125, Settling groove; 1251, Groove bottom; 126, Fixing notch; 127, First shaft hole; 13, Top cover; 131, Top cover body; 132, Second clearance groove; 133, Second shaft hole; 14, Winding assembly; 141, Wire 15. Flexible circuit board; 151. Fixed solder joint; 152. First plate; 1521. Clearance notch; 153. Second plate; 154. Third plate; 16. Magnetic angle position sensor; 17. First iron core; 18. Second iron core; 2. Mover; 21. Rotating shaft; 22. Magnet; 23. Hall magnet; 231. Through hole; 3. Reinforcing plate; 4. First bearing; 5. First sealing ring; 6. Second bearing; 7. Second sealing ring; 8. Helical spring; 9. Bushing. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] This invention provides a hollow cup motor 100, combined with... Figures 1 to 5 As shown, it includes a stator 1 and a mover 2. The stator 1 is used to drive the mover 2 to rotate. The stator 1 includes a hollow housing 11 with openings at both ends, a bottom cover 12 and a top cover 13 fixed to opposite ends of the housing 11, a winding assembly 14 fixed to the inner circumference of the housing 11, and a flexible circuit board 15 fixed to the side of the bottom cover 12 away from the top cover 13. The mover 2 includes a rotating shaft 21 extending from the housing 11 and rotatably supported at both ends by the bottom cover 12 and the top cover 13, and a magnet 22 fixed to the outer circumference of the rotating shaft 21.

[0028] The flexible circuit board 15 is arranged perpendicular to the axial direction of the rotating shaft 21; the winding assembly 14 includes a coil 141 fixed to the inner circumference of the housing 11, the coil 141 surrounds the outer circumference of the magnet 22 and is spaced apart from the magnet 22.

[0029] The bottom cover 12 includes a bottom cover body 121 that is fixed to one end of the housing 11 and partially extends into the housing 11, a first pivot hole 127 that passes through the bottom cover body 121 along the axial direction of the pivot 21, a first relief groove 122 that is recessed and annular from the side of the bottom cover body 121 near the top cover 13 toward the side away from the top cover 13, and a through hole 123 that passes through the bottom side 1221 of the first relief groove 122 to the side of the bottom cover body 121 away from the top cover 13.

[0030] The first clearance groove 122 is arranged around the first rotating shaft hole 127. One end of the rotating shaft 21 is inserted into the first rotating shaft hole 127 and forms a rotatable connection with the bottom cover body 121. The end of the coil 141 near the bottom cover 12 is received in the first clearance groove 122. The lead end of the coil 141 passes through the through hole 123 and extends to the flexible circuit board 15 and is fixedly electrically connected to the fixed solder joint 151 of the flexible circuit board 15.

[0031] In this embodiment, by setting the flexible circuit board 15 perpendicular to the axis of the rotating shaft 21 and providing a through hole 123 on the bottom cover body 121, the flexible circuit board 15 can be arranged in the axis perpendicular to the rotating shaft 21, and it is not restricted by the internal wiring of the hollow cup motor 100. This is equivalent to allowing the lead ends of the coil 141 to pass through the through hole 123 and be electrically connected to the flexible circuit board 15. This can shorten the overall length of the hollow cup motor 100 to achieve miniaturization, or increase the arrangement space of the magnetic circuit within the same overall length of the hollow cup motor 100, thereby improving the performance of the magnetic circuit. Furthermore, a first clearance groove 122 is provided on the bottom cover body 121, and the end of the coil 141 near the bottom cover 12 is housed in the first clearance groove 122. This can increase the arrangement length of the coil 141 along the axis of the rotating shaft 21, resulting in better driving performance.

[0032] The mover 2 also includes a ring-shaped Hall magnet 23, which is sleeved and fixed to one end of the rotating shaft 21 near the bottom cover 12. The Hall magnet 23 has a through hole 231 to make it ring-shaped. The stator 1 also includes a magnetic angle position sensor 16 fixed to the flexible circuit board 15. The magnetic angle position sensor 16 is directly opposite and spaced apart from the Hall magnet 23 along the axial direction of the rotating shaft 21, and is used to detect the rotation angle of the Hall magnet 23. By designing the Hall magnet 23 as a ring and sleeved and fixed to one end of the rotating shaft 21 near the bottom cover 12, the length space occupied by the Hall magnet 23 can be reduced. The length direction of the hollow cup motor 100 is parallel to the axial direction of the rotating shaft 21.

[0033] The bottom cover 12 also includes a receiving groove 124 recessed from the side of the bottom cover body 121 away from the top cover 13 toward the top cover 13; the end of the rotating shaft 21 away from the top cover 13 passes through the first rotating shaft hole 127 and extends into the receiving groove 124, and the Hall magnet 23 is received in the receiving groove 124.

[0034] The flexible circuit board 15 includes a first plate 152 and a second plate 153 arranged parallel to each other and spaced apart, and a third plate 154 connecting the first plate 152 and the second plate 153 and perpendicular to the first plate 152. The first plate 152 is closer to the top cover 13 than the second plate 153. The fixing solder joint 151 is located on the side of the first plate 152 away from the top cover 13. The first plate 152 is annular and fixed to the bottom wall 1241 of the receiving groove 124. The first plate 152 is arranged around the Hall magnet 23 and spaced apart from each other. The side of the first plate 152 away from the top cover 13 and the side of the Hall magnet 23 near the top cover 13 are on the same plane. The second plate 153 is fixed to the side of the bottom cover body 121 away from the top cover 13 and extends outward from the bottom cover body 121. The third plate 154 is received in the receiving groove 124. The magnetic angle position sensor 16 is fixed to the side of the second plate 153 near the first plate 152.

[0035] In this embodiment, by providing a receiving groove 124 on the bottom cover body 121 and housing the first plate 152 and the third plate 154 of the flexible circuit board 15 within the receiving groove 124, this design not only facilitates the connection of the lead end of the coil 141 to the flexible circuit board 15, but also reduces the space occupied by the flexible circuit board 15. In addition, by arranging the first plate 152 around the Hall magnet 23, and arranging the side of the first plate 152 away from the top cover 13 and the side of the Hall magnet 23 near the top cover 13 on the same plane, it is convenient to arrange the first plate 152, and also reduces the length space occupied by the Hall magnet 23, thereby improving the arrangement space of the magnetic circuit system, and also facilitating the magnetic angle position sensor 16 to be arranged opposite to the Hall magnet 23 at intervals.

[0036] The bottom cover 12 also includes a recessed groove 125 formed by the bottom cover body 121 from the side away from the top cover 13 toward the top cover 13 and surrounding the receiving groove 124, and a fixing notch 126 formed through part of the sidewall of the recessed groove 125. The recessed groove 125 communicates with the receiving groove 124. The side of the second plate 153 near the first plate 152 is fixed to the bottom 1251 of the groove 125, and the second plate 153 extends outward from the bottom cover body 121 through the fixing notch 126. This design can further reduce the length space occupied by the flexible circuit board 15.

[0037] The hollow cup motor 100 also includes a reinforcing plate 3 fixed to the bottom cover body 121 on the side away from the top cover 13; the side of the reinforcing plate 3 near the top cover 13 is fixed to the side of the second plate 153 away from the first plate 152. This design can improve the structural strength of the flexible circuit board 15 and improve its positioning accuracy with the chip.

[0038] The top cover 13 includes a top cover body 131 fixed to the other end of the housing 11 and partially extending into the housing 11, a second pivot hole 133 penetrating the top cover body 131 along the axial direction of the pivot 21, and a second relief groove 132 recessed from the side of the top cover body 131 near the bottom cover 12 and extending away from the bottom cover 12 in an annular shape. The second relief groove 132 is arranged around the second pivot hole 133, and the other end of the pivot 21 is inserted into the second pivot hole 133 and forms a rotatable connection with the top cover body 131. The end of the coil 141 near the top cover 13 is received in the second relief groove 132. This design can increase the length of the coil 141 along the axial direction of the pivot 21, thereby improving its driving performance.

[0039] The winding assembly 14 includes a plurality of coils 141 arranged circumferentially around the housing 11, with the coils 141 collectively surrounding the magnet 22; the number of through holes 123 is the same as the number of coils 141; the periphery of the first plate 152 is provided with a plurality of clearance notches 1521 passing through it, the number of which is the same as the number of through holes 123, and the plurality of clearance notches 1521 are arranged in a one-to-one correspondence with the plurality of through holes 123; the two leads of each coil 141 pass through one of the through holes 123 and the clearance notch 1521 corresponding to the through hole 123 in sequence and are soldered to a fixed solder joint 151. In this embodiment, there are three coils 141, three through holes 123, three fixed solder joints 151, and three clearance notches 1521, and the two leads of each coil 141 are soldered to the same fixed solder joint 151 having a positive connection point and a negative connection point. The fixed solder joint 151 can also be designed as two, one of which is a positive connection point for electrical connection with the positive lead of the multiple coils 141, and the other is a negative connection point for electrical connection with the negative lead of the multiple coils 141.

[0040] In this embodiment, by setting multiple coils 141, the driving performance can be improved. By setting an avoidance notch 1521 on the first plate 152, it is convenient for the two ends of the coil 141 to pass around the side of the first plate 152 near the top cover 13 to be soldered to the fixed solder point 151 located on the side of the first plate 152 away from the top cover 13.

[0041] The stator 1 also includes a first iron core 17 and a second iron core 18 that are fixed to the inner side of the housing 11 and are hollow. The first iron core 17 and the second iron core 18 are coaxially arranged with the rotating shaft 21 and arranged along the axial direction of the rotating shaft 21 and fixed to each other. The end of the first iron core 17 away from the second iron core 18 is fixed to the side of the bottom cover body 121 near the top cover 13, and the end of the second iron core 18 away from the first iron core 17 is fixed to the side of the top cover body 131 near the bottom cover 12. The coil 141 is fixed to the inner circumference of the first iron core 17 and the inner circumference of the second iron core 18.

[0042] The hollow cup motor 100 also includes a first bearing 4 fixed in the first shaft hole 127, a first sealing ring 5 arranged around the first bearing 4 and fixed in the bottom cover body 121, a second bearing 6 fixed in the second shaft hole 133, and a second sealing ring 7 arranged around the second bearing 6 and fixed in the top cover body 131; the shaft 21 is rotatably connected to the bottom cover body 121 through the first bearing 4, and the shaft 21 is rotatably connected to the top cover body 131 through the second bearing 6.

[0043] In this embodiment, the function of the first bearing 4 and the second bearing 6 is to facilitate the rotational connection between the rotating shaft 21 and the bottom cover body 121 and the top cover body 131, respectively, while the function of the first sealing ring 5 and the second sealing ring 7 is to achieve dustproof sealing.

[0044] The hollow cup motor 100 also includes a helical spring 8 and a bushing 9 spaced apart and sleeved on the rotating shaft 21. The two ends of the helical spring 8 abut against the side of the first bearing 4 near the top cover 13 and the side of the magnet 22 near the bottom cover 12, respectively. The two ends of the bushing 9 are fixed to the side of the second bearing 6 near the bottom cover 12 and the side of the magnet 22 near the top cover 13, respectively. This design provides a shock absorption effect for the axial movement of the rotating shaft 21 through the helical spring 8 and the bushing 9.

[0045] The helical spring 8 is spaced apart from the rotating shaft 21 to avoid the helical spring 8 affecting the rotation of the rotating shaft 21; the bushing 9 can be spaced apart from the rotating shaft 21 to avoid the bushing 9 affecting the rotation of the rotating shaft 21. Of course, the bushing 9 can also be fixed to the rotating shaft 21 and rotate coaxially with the rotating shaft 21.

[0046] Compared with related technologies, the hollow cup motor 100 in this embodiment is configured such that the flexible circuit board 15 is perpendicular to the axial direction of the rotating shaft 21. The bottom cover 12 includes a bottom cover body 121 that covers and is fixed to one end of the housing 11 and extends partially into the housing 11, a first rotating shaft hole 127 that passes through the bottom cover body 121 along the axial direction of the rotating shaft 21, a first relief groove 122 that is recessed and annular from the side of the bottom cover body 121 near the top cover 13 toward the side away from the top cover 13, and a through hole 123 that passes through the bottom side 1221 of the first relief groove 122 to the side of the bottom cover body 121 away from the top cover 13, and the lead ends of the coil 141 pass through the through hole 123 and extend to the flexible circuit. The plate 15 is fixedly electrically connected to the fixed solder joint 151 of the flexible circuit board 15. This allows the flexible circuit board 15 to be arranged in an axial direction perpendicular to the rotating shaft 21, and it is not restricted by the internal wiring of the hollow cup motor 100. This shortens the overall length of the hollow cup motor 100 to achieve miniaturization, or allows the hollow cup motor 100 to increase the arrangement space of the magnetic circuit with the same overall length, thereby improving the magnetic circuit performance. In addition, the hollow cup motor 100 of the present invention also accommodates the end of the coil 141 near the bottom cover 12 in the first clearance groove 122. This increases the arrangement length of the coil 141 along the axial direction of the rotating shaft 21, making its driving performance better.

[0047] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A hollow cup motor, comprising a stator and a mover, the stator being used to drive the mover to rotate; the stator comprising a hollow housing with openings at both ends, a bottom cover and a top cover fixed to opposite ends of the housing, a winding assembly fixed to the inner periphery of the housing, and a flexible circuit board fixed to the bottom cover on the side away from the top cover; the mover comprising a rotating shaft extending from the housing and rotatably supported at both ends by the bottom cover and the top cover respectively, and a magnet fixed to the outer periphery of the rotating shaft; characterized in that, The winding assembly includes a coil fixed to the inner circumference of the housing, the coil surrounding the outer circumference of the magnet and spaced apart from the magnet, and the flexible circuit board being arranged perpendicular to the axial direction of the rotating shaft; The bottom cover includes a bottom cover body that covers and is fixed to one end of the housing and partially extends into the housing; a first pivot hole that penetrates the bottom cover body along the axial direction of the pivot; a first relief groove that is recessed and annular from the side of the bottom cover body near the top cover towards the side away from the top cover; and a through hole that penetrates from the bottom side of the first relief groove to the side of the bottom cover body away from the top cover. The first relief groove is arranged around the first pivot hole. One end of the pivot is inserted into the first pivot hole and forms a rotatable connection with the bottom cover body. The end of the coil near the bottom cover is received in the first relief groove. The lead ends of the coil pass through the through hole and extend to the flexible circuit board and are fixedly electrically connected to the fixed solder joints on the flexible circuit board.

2. The hollow cup motor as described in claim 1, characterized in that, The mover also includes a ring-shaped Hall magnet, which is sleeved and fixed to one end of the rotating shaft near the bottom cover; the stator also includes a magnetic angle position sensor fixed to the flexible circuit board, which is directly opposite to and spaced apart from the Hall magnet along the axial direction of the rotating shaft, and is used to detect the rotation angle of the Hall magnet.

3. The hollow cup motor as described in claim 2, characterized in that, The bottom cover also includes a receiving groove recessed from the side of the bottom cover body away from the top cover toward the top cover; the end of the rotating shaft away from the top cover passes through the first rotating shaft hole and extends into the receiving groove, and the Hall magnet is received in the receiving groove; the flexible circuit board includes a first plate and a second plate arranged parallel to each other and spaced apart, and a third plate connecting the first plate and the second plate and perpendicular to the first plate, the first plate being closer to the top cover than the second plate, and the fixing solder joint being located on the side of the first plate away from the top cover; the first plate is annular and fixed to the bottom wall of the receiving groove, the first plate is arranged around the Hall magnet and spaced apart from each other, the second plate is fixed to the side of the bottom cover body away from the top cover and extends outward from the bottom cover body, the third plate is received in the receiving groove, and the magnetic angle position sensor is fixed to the side of the second plate near the first plate.

4. The hollow cup motor as described in claim 3, characterized in that, The bottom cover also includes a recessed groove formed by the side of the bottom cover body away from the top cover and towards the top cover and surrounding the receiving groove, and a fixing notch formed through part of the side wall of the recessed groove, the recessed groove being in communication with the receiving groove; the side of the second plate body near the first plate body is fixed to the bottom of the recessed groove, and the second plate body extends outward from the bottom cover body through the fixing notch.

5. The hollow cup motor as described in claim 4, characterized in that, The hollow cup motor also includes a reinforcing plate fixed to the bottom cover body on the side away from the top cover; the side of the reinforcing plate near the top cover is fixed to the side of the second plate body away from the first plate body.

6. The hollow cup motor as described in claim 3, characterized in that, The winding assembly includes a plurality of coils arranged circumferentially around the housing, the plurality of coils together surrounding the magnet; the number of through holes is the same as the number of coils; the periphery of the first plate is provided with a plurality of clearance notches that pass through it and the number of clearance notches is the same as the number of through holes, the plurality of clearance notches are arranged in a one-to-one correspondence with the plurality of through holes; the two leads of each coil pass through one of the through holes and the clearance notch corresponding to the through hole in sequence and are welded to the fixed solder point.

7. The hollow cup motor as described in claim 1, characterized in that, The top cover includes a top cover body fixed to the other end of the housing and partially extending into the housing, a second pivot hole penetrating the top cover body along the axial direction of the pivot, and a second relief groove recessed from the side of the top cover body near the bottom cover and in an annular shape away from the bottom cover; the second relief groove is arranged around the second pivot hole, the other end of the pivot is inserted into the second pivot hole and forms a rotatable connection with the top cover body, and the end of the coil near the top cover is received in the second relief groove.

8. The hollow cup motor as described in claim 7, characterized in that, The stator further includes a first iron core and a second iron core that are fixed to the inner side of the housing and are hollow. The first iron core and the second iron core are coaxially arranged with the rotating shaft and are arranged along the axial direction of the rotating shaft and fixed to each other. The end of the first iron core away from the second iron core is fixed to the side of the bottom cover body near the top cover, and the end of the second iron core away from the first iron core is fixed to the side of the top cover body near the bottom cover. The coil is fixed to the inner circumference of both the first iron core and the second iron core.

9. The hollow cup motor as described in claim 7, characterized in that, The hollow cup motor further includes a first bearing fixed in the first shaft hole, a first sealing ring arranged around the first bearing and fixed in the bottom cover body, a second bearing fixed in the second shaft hole, and a second sealing ring arranged around the second bearing and fixed in the top cover body; the shaft is rotatably connected to the bottom cover body through the first bearing, and the shaft is rotatably connected to the top cover body through the second bearing.

10. The hollow cup motor as described in claim 9, characterized in that, The hollow cup motor also includes a helical spring and a bushing respectively fitted onto the rotating shaft; the two ends of the helical spring abut against the side of the first bearing near the top cover and the side of the magnet near the bottom cover respectively, and the two ends of the bushing are respectively fixed to the side of the second bearing near the bottom cover and the side of the magnet near the top cover.

Images