High-speed scanning motor

Abstract

The utility model relates to the technical field of motors, and discloses a high-speed scanning motor, which is characterized in that a shell is provided with a first cavity, a rotating shaft hole and a second cavity which are sequentially communicated, a motor shaft respectively extends into the first cavity and the second cavity through the rotating shaft hole and is rotatably connected to the shell, and a magnet assembly is fixed in the first cavity; the circuit board winding is rotationally installed in the first cavity and coaxially connected to the motor shaft, and the magnet assembly is in transmission fit with the circuit board winding; the signal circuit assembly comprises a photoelectric receiving module, a grating disc, a light source piece, a first circuit board and a second circuit board used for being externally connected with a driving circuit, the grating disc is connected to the motor shaft, the photoelectric receiving module is electrically connected with the first circuit board, the first circuit board is electrically connected with the second circuit board, and the first circuit board is provided with a circuit board connecting hole; the circuit board winding is connected with a connecting line, and the connecting line passes through the rotating shaft hole and the circuit board connecting hole and is electrically connected with the second circuit board. According to the high-speed scanning motor provided by the utility model, the wiring of the circuit board winding is simple and reliable, and the dynamic response performance of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a high-speed scanning motor. Background Art

[0002] In modern industry and automation, the performance and reliability of high-speed scanning motors are directly linked to production efficiency and equipment stability. With technological advancements, demands for motor dynamic response are increasing, especially in applications such as high-speed scanning, precision positioning, and rapid response. Motor response speed and stability have become key technical indicators. However, traditional high-speed scanning motors often face challenges such as complex circuit board winding wiring, prone to errors, and poor reliability. These issues directly limit the motor's dynamic response performance and service life. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. The utility model provides a high-speed scanning motor with simpler and more reliable circuit board winding connection, which improves the dynamic response performance of the motor and achieves higher precision.

[0004] To achieve the above-mentioned objectives, the present invention provides a high-speed scanning motor, comprising a housing, a motor shaft, a circuit board winding, a magnet assembly, and a signal circuit assembly. The housing is axially provided with a first cavity, a rotating shaft hole, and a second cavity that are sequentially connected. The motor shaft extends into the first cavity and the second cavity respectively through the rotating shaft hole and is rotatably connected to the housing. The magnet assembly is fixed to the first cavity. The circuit board winding is rotatably mounted in the first cavity and coaxially connected to the motor shaft. The magnet assembly and the circuit board winding are transmission-coordinated.

[0005] The signal circuit assembly is located in the second cavity, and the signal circuit assembly includes a photoelectric receiving module, a grating disk, a light source, a first circuit board and a second circuit board for an external drive circuit arranged in sequence along the axial direction. The grating disk is connected to the motor shaft, the photoelectric receiving module is electrically connected to the first circuit board, the first circuit board is electrically connected to the second circuit board, the first circuit board is provided with a circuit board connecting hole, the circuit board winding is connected to a connecting wire, and the connecting wire passes through the shaft hole and the circuit board connecting hole in sequence and is electrically connected to the second circuit board.

[0006] As a preferred solution, the connecting line extends along the axial direction of the motor shaft.

[0007] As a preferred embodiment, the motor shaft is provided with a side wire passing hole and an axial hole, the side wire passing hole is located on the circumferential side of the motor shaft, the side wire passing hole is connected to the axial hole, the axial hole extends to one end of the motor shaft facing the first circuit board, and the connecting wire enters the axial hole from the side wire passing hole and extends out.

[0008] As a preferred solution, the motor shaft protrudes radially to form a mounting step, the circuit board winding includes a circuit board body and a winding circuit, the winding circuit is connected to the circuit board body, the circuit board body is provided with a central through hole, the circuit board body is installed on the motor shaft through the central through hole, the motor shaft is connected with a shaft sleeve, the shaft sleeve is provided with a sleeve hole, the shaft sleeve is installed on the motor shaft through the sleeve hole, the circuit board body is located between the mounting step and the shaft sleeve, and the shaft sleeve is connected to the mounting step through the circuit board body.

[0009] As a preferred solution, the motor shaft is connected to a preload elastic part, the housing is provided with an elastic mounting groove with an opening toward the first cavity, one end of the preload elastic part is connected to the elastic mounting groove, the end of the sleeve facing the preload elastic part is connected to the second bearing, and the other end of the preload elastic part abuts against the second bearing.

[0010] As a preferred embodiment, the signal circuit assembly also includes a connecting column connected to the shell, and the photoelectric receiving module, the first circuit board and the second circuit board are connected through the connecting column. The photoelectric receiving module is provided with a photoelectric detection device, the light-emitting surface of the light source part faces the photoelectric detection device, and the light source part is connected to the first circuit board.

[0011] As a preferred solution, a tray is connected to one end of the motor shaft facing the signal circuit assembly, a tray groove is provided at one end of the tray facing the motor shaft, one end of the motor shaft is connected to the tray groove, a limiting boss is provided at one end of the tray facing the signal circuit assembly, the grating disk is provided with a grating through hole, the grating through hole is coaxially connected to the limiting boss, and the grating disk is provided with a light-transmitting hole for the light source component to transmit light.

[0012] As a preferred solution, the shell is provided with a shell opening communicated with the first cavity, and the motor shaft is connected to the vibrating lens through the shell opening.

[0013] As a preferred solution, the housing is connected to an end cover, the end cover is provided with a limiting groove, the motor shaft is connected to a limiting pin extending radially, and the limiting pin is installed in the limiting groove.

[0014] As a preferred embodiment, the shell includes an upper shell, a middle shell, a lower shell and a cover shell which are connected in sequence along the axial direction through the shaft hole, and the first cavity is formed between the upper shell, the middle shell and the lower shell, the upper shell is provided with a first mounting groove on the side facing the lower shell, and the middle shell is provided with a second mounting groove which is positioned corresponding to the first mounting groove, the magnet assembly includes a first magnet and a second magnet, the upper end of the first magnet is connected to the first mounting groove, the second magnet is installed in the second mounting groove and connected to the upper end of the lower shell, the upper end of one of the second magnets is arranged corresponding to the lower end of one of the first magnets, and the second cavity is formed between the lower shell and the cover shell.

[0015] Compared with the prior art, the present invention provides a high-speed scanning motor having the following advantages: a housing is provided with a first cavity, a second cavity, and a rotating shaft hole; the first cavity communicates with the second cavity through the rotating shaft hole; a circuit board winding is connected to the motor shaft; a magnet assembly and the circuit board winding are mounted in the first cavity; the magnet assembly and the circuit board winding are in transmission engagement; when the circuit board winding is energized, the circuit board winding can rotate relative to the magnet assembly, thereby driving the motor shaft to rotate; a signal circuit assembly is located in the second cavity; the signal circuit assembly includes a photoelectric receiving module, a grating disk, a light source, a first circuit board, and a second circuit board arranged in sequence along the axial direction; the grating disk is connected to the motor shaft; when the grating disk rotates with the motor shaft, light emitted by the light source passes through the slits of the grating disk and irradiates a photoelectric detection device on the photoelectric receiving module; the photoelectric detection device converts the received light signal into an electrical signal; the electrical signal is processed by a conversion circuit to obtain information about the rotation angle or speed of the motor shaft, thereby forming a feedback signal fed back to the drive circuit. The connecting wire of the circuit board winding passes through the shaft hole and the circuit board connecting hole in sequence and is electrically connected to the second circuit board, thereby realizing electrical connection between the circuit board winding, the second circuit board, the first circuit board, and the photoelectric receiving module. The wiring of the circuit board winding is simple and reliable, which improves the dynamic response performance of the motor while achieving higher precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0017] Figure 2 It is a schematic diagram of the overall internal structure of an embodiment of the present utility model.

[0018] Figure 3 It is a schematic diagram of the disassembled structure of the components of an embodiment of the utility model.

[0019] Figure 4 It is a structural schematic diagram of the magnet assembly of an embodiment of the present utility model.

[0020] Figure 5It is a schematic diagram of the assembly structure of the motor shaft, circuit board winding, shaft sleeve, tray and grating disk in an embodiment of the present utility model.

[0021] Figure 6 It is a front view schematic diagram of a wiring method of the circuit board winding in an embodiment of the present utility model.

[0022] Figure 7 This is a reverse schematic diagram of a wiring method for the circuit board winding according to an embodiment of the present utility model.

[0023] In the picture:

[0024] 10. Housing; 11. First cavity; 12. Shaft hole; 13. Second cavity; 14. Elastic mounting slot; 15. Housing opening; 16. Vibration lens; 17. End cap; 18. Limiting slot; 19. Upper housing; 20. First mounting slot; 21. Middle housing; 22. Second mounting slot; 23. Lower housing; 24. Cover housing;

[0025] 30. Motor shaft; 31. Side wire hole; 32. Shaft hole; 33. Mounting step; 34. Shaft sleeve; 35. Sleeve hole; 36. Preload elastic member; 37. Tray; 38. Tray slot; 39. Limiting boss; 40. Limiting pin; 41. Second bearing; 42. First bearing;

[0026] 50. Circuit board winding; 51. Connecting wire; 52. Circuit board body; 53. Middle through hole; 54. Winding circuit; 55. First circuit board winding; 56. First surface; 57. First winding connection end; 58. First terminal; 59. Second circuit board winding; 60. Second surface; 61. Second winding connection end; 62. Second terminal; 63. Output arm;

[0027] 70. Magnet assembly; 71. First magnet; 72. Second magnet; 73. Magnetic field air gap;

[0028] 80. Signal circuit assembly; 81. Photoelectric receiving module; 82. Grating disk; 83. Light source; 84. First circuit board; 85. Second circuit board; 86. Connecting column; 87. Circuit board connecting hole. DETAILED DESCRIPTION

[0029] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present invention, it should be understood that the terms "connected," "connected," "fixed," etc. used in the present invention should be interpreted broadly. For example, the terms may refer to fixed connection, detachable connection, or integration; mechanical connection, welding connection; direct connection, indirect connection through an intermediate medium, internal communication between two elements, or interaction between two elements, unless otherwise explicitly defined. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] like Figures 1 to 7 As shown, a high-speed scanning motor according to a preferred embodiment of the present utility model includes a housing 10, a motor shaft 30, a circuit board winding 50, a magnet assembly 70, and a signal circuit assembly 80. The housing 10 is provided with a first cavity 11, a shaft hole 12, and a second cavity 13 that are sequentially connected along the axial direction. The motor shaft 30 extends into the first cavity 11 and the second cavity 13 respectively through the shaft hole 12 and is rotatably connected to the housing 10. The magnet assembly 70 is fixed to the first cavity 11. The circuit board winding 50 is rotatably mounted in the first cavity 11 and coaxially connected to the motor shaft 30. The magnet assembly 70 and the circuit board winding 50 are transmission-coordinated.

[0033] The signal circuit assembly 80 is located in the second cavity 13. The signal circuit assembly 80 includes a photoelectric receiving module 81, a grating disk 82, a light source 83, a first circuit board 84 and a second circuit board 85 for an external drive circuit arranged in sequence along the axial direction. The grating disk 82 is connected to the motor shaft 30. The photoelectric receiving module 81 is electrically connected to the first circuit board 84. The first circuit board 84 is electrically connected to the second circuit board 85. The first circuit board 84 is provided with a circuit board connecting hole 87. The circuit board winding 50 is connected to a connecting wire 51. The connecting wire 51 passes through the rotating shaft hole 12 and the circuit board connecting hole 87 in sequence and is electrically connected to the second circuit board 85.

[0034] The high-speed scanning motor of the present invention has a first cavity 11, a second cavity 13 and a shaft hole 12 provided in the shell 10. The first cavity 11 is connected to the second cavity 13 through the shaft hole 12. The circuit board winding 50 is connected to the motor shaft 30. The magnet assembly 70 and the circuit board winding 50 are installed in the first cavity 11. The magnet assembly 70 and the circuit board winding 50 are matched in transmission. After the circuit board winding 50 is energized, the circuit board winding 50 can rotate relative to the magnet assembly 70 and drive the motor shaft 30 to rotate. The signal circuit assembly 80 is located in the second cavity 13 and includes a photoelectric receiving module 81, a grating disk 82, a light source 83, a first circuit board 84, and a second circuit board 85, arranged in axial order. The grating disk 82 is connected to the motor shaft 30. When the grating disk 82 rotates with the motor shaft 30, light emitted by the light source 83 passes through the gaps in the grating disk 82 and illuminates the photoelectric detection device on the photoelectric receiving module 81. The photoelectric detection device converts the received light signal into an electrical signal. The electrical signal is processed by the conversion circuit to obtain information about the rotation angle or speed of the motor shaft 30, thereby forming a feedback signal that is fed back to the drive circuit. The connecting wire 51 of the circuit board winding 50 passes through the shaft hole 12 and the circuit board connection hole 87 and is electrically connected to the second circuit board 85, thereby electrically connecting the circuit board winding 50, the second circuit board 85, the first circuit board 84, and the photoelectric receiving module 81. This makes the wiring of the circuit board winding 50 simpler and more reliable, improving the dynamic response performance of the motor while achieving higher precision.

[0035] Further, such as Figures 2 to 3 as well as Figure 5 As shown, the connecting wire 51 extends axially along the motor shaft 30. The connecting wire 51 extends along the motor shaft 30, which provides a routing carrier for the connecting wire 51 and provides preliminary positioning for the routing of the connecting wire 51. The layout of the connecting wire 51 extending along the motor shaft 30 makes the wiring of the connecting wire 51 neater and more orderly, reducing the risk of mechanical interference and electrical failure caused by messy wiring.

[0036] Further, such as Figure 5 As shown, the motor shaft 30 is provided with a side wire hole 31 and a shaft hole 32. The side wire hole 31 is located on the peripheral side of the motor shaft 30. The side wire hole 31 is connected to the shaft hole 32. The shaft hole 32 extends to the end of the motor shaft 30 facing the first circuit board 84. The connecting wire 51 enters the shaft hole 32 from the side wire hole 31 and extends out. By allowing the connecting wire 51 to enter the shaft hole 32 from the side wire hole 31 and extend out, the space inside the motor shaft 30 is effectively utilized and the external space occupied is reduced. The connecting wire 51 extends along the motor shaft 30, and the structural strength of the motor shaft 30 provides certain protection and support for the connecting wire 51. The risk of the connecting wire 51 being damaged by external forces (such as pulling and bending) is reduced, thereby improving the reliability and durability of the entire motor system.

[0037] As one embodiment, Figure 2 as well as Figure 5 As shown, the position of the side wire hole 31 is set corresponding to the position of the circuit board winding 50 to shorten the distance for the connecting wire 51 of the circuit board winding 50 to enter the side wire hole 31 and improve the orderliness of the routing.

[0038] Further, such as Figures 2 to 3 as well as Figure 5 As shown, the motor shaft 30 protrudes radially to form a mounting step 33. The circuit board winding 50 includes a circuit board body 52 and a winding circuit 54. The winding circuit 54 is connected to the circuit board body 52. ​​The circuit board body 52 is provided with a central through hole 53. The circuit board body 52 is mounted on the motor shaft 30 through the central through hole 53. The motor shaft 30 is connected to a shaft sleeve 34. The shaft sleeve 34 is provided with a sleeve hole 35. The shaft sleeve 34 is mounted on the motor shaft 30 through the sleeve hole 35. The circuit board body 52 is located between the mounting step 33 and the shaft sleeve 34. The shaft sleeve 34 is connected to the mounting step 33 through the circuit board body 52. ​​The circuit board body 52 is located between the mounting step 33 and the shaft sleeve 34, thereby limiting the axial installation position of the circuit board body 52, so that the circuit board winding 50 and the magnet assembly 70 can be stably driven and matched.

[0039] As one embodiment, Figure 5 As shown, the circuit board body 52 is provided with a circuit board connecting hole 87, the mounting step 33 is provided with a step connecting hole on the side facing the circuit board body 52, and the shaft sleeve 34 is provided with a sleeve connecting hole. The screws are threadedly connected through the sleeve connecting hole, the circuit board connecting hole 87 and the step connecting hole respectively, thereby realizing the connection between the mounting step 33, the circuit board winding 50 and the shaft sleeve 34.

[0040] As one embodiment, Figure 5 As shown, the outer circumference of the motor shaft 30 is provided with a first limiting surface, and the inner wall of the through hole 53 is provided with a second limiting surface having a shape corresponding to the first limiting surface. The first limiting surface and the second limiting surface are connected, so that when the motor shaft 30 rotates, the circuit board body 52 rotates synchronously, limiting the circumferential rotation of the motor shaft 30 and the circuit board body 52, while also improving assembly accuracy. As one embodiment, the first limiting surface and the second limiting surface are respectively linear surfaces. Of course, the shapes of the first limiting surface and the second limiting surface are not limited, as long as the circuit board body 52 and the motor shaft 30 do not rotate relative to each other.

[0041] Further, such as Figures 2 to 3As shown, the motor shaft 30 is connected to a preload elastic member 36. The housing 10 is provided with an elastic mounting groove 14 with an opening toward the first cavity 11. One end of the preload elastic member 36 is connected to the elastic mounting groove 14. The end of the sleeve 34 facing the preload elastic member 36 is connected to a second bearing 41. The other end of the preload elastic member 36 abuts the second bearing 41. The elastic mounting groove 14 provides installation space for the preload elastic member 36 and provides preliminary positioning for the preload elastic member 36. The preload elastic member 36 and the motor shaft 30 can move relative to each other in the axial direction. The preload elastic member 36 provides axial preload to the motor shaft 30 and the circuit board winding assembly, thereby improving the relative rotational stability of the circuit board winding 50 and the magnet assembly 70. The preload elastic member 36 abuts the second bearing 41, improving the smoothness of the rotation of the motor shaft 30.

[0042] As one embodiment, the preload elastic member 36 is a spring.

[0043] As one embodiment, Figures 2 to 3 As shown, the motor shaft 30 is rotatably connected to the housing 10 via a bearing, thereby improving the relative rotation smoothness between the motor shaft 30 and the housing 10 .

[0044] As one embodiment, Figure 2 As shown, the motor shaft 30 is provided with a first bearing 42. The inner ring of the first bearing 42 is connected to one end of the motor shaft 30, and the outer ring of the first bearing 42 is connected to the housing 10. The first bearing 42 is located in the first cavity 11. The other end of the motor shaft 30 is connected to the inner ring of the second bearing 41. The outer ring of the second bearing 41 abuts against the preload elastic member 36. The second bearing is located in the second cavity 13. The two independent first bearings 42 and second bearings 41 are connected to the motor shaft 30, respectively, to improve the stability of the motor shaft 30 during operation. Distributing the load between the two bearings can significantly reduce the load on a single bearing, reduce wear and fatigue, and thus extend the service life of the bearings and the entire motor system.

[0045] As one embodiment, the outer ring of the first bearing 42 is connected to the upper shell 19 to fix the first bearing 42 .

[0046] Further, such as Figures 2 to 3As shown, the signal circuit assembly 80 also includes a connecting post 86 connected to the housing 10. The photoelectric receiving module 81, the first circuit board 84, and the second circuit board 85 are connected via the connecting post 86. The photoelectric receiving module 81 is provided with a photoelectric detection device. The light emitting surface of the light source 83 faces the photoelectric detection device, and the light source 83 is connected to the first circuit board 84. The photoelectric receiving module 81, the first circuit board 84, and the second circuit board 85 are connected to each other via the connecting post 86 to form a whole. The photoelectric receiving module 81, the first circuit board 84, and the second circuit board 85 are spaced apart along the axial direction. The grating disk 82 can be assembled between the photoelectric receiving module 81 and the light source 83 via the motor shaft 30. The light source 83 is connected to the first circuit board 84 for fixation. The light source 83 can have its own power supply or be electrically connected to the first circuit board 84. The photoelectric receiving module 81, the first circuit board 84, and the second circuit board 85 are connected to each other via the connecting post 86 to form a whole, which facilitates installation in the second cavity 13 and improves the overall structural stability of the signal circuit assembly 80.

[0047] Further, such as Figures 2 to 3 as well as Figure 5 As shown, the end of the motor shaft 30 facing the signal circuit assembly 80 is connected to a tray 37. The end of the tray 37 facing the motor shaft 30 is provided with a tray slot 38. One end of the motor shaft 30 is connected to the tray slot 38. The end of the tray 37 facing the signal circuit assembly 80 is provided with a limiting boss 39. The grating disk 82 is provided with a grating through-hole. The grating through-hole is coaxially connected to the limiting boss 39. The grating disk 82 is provided with a light-transmitting hole for light transmission of the light source 83. By connecting one end of the motor shaft 30 to the tray slot 38, the motor shaft 30 and the tray 37 are coaxially connected. The end shape of the tray slot 38 corresponds to the end shape of the motor shaft 30, and the motor shaft 30 is limited by the tray slot 38. The grating disk 82 is connected to the motor shaft 30 via the tray 37. The limiting boss 39 is assembled with the grating through-hole to position and install the grating disk 82, improving assembly efficiency and accuracy.

[0048] Further, such as Figures 2 to 3 As shown, the housing 10 is provided with a shell opening 15 communicating with the first cavity 11, and the motor shaft 30 is connected to the vibrating lens 16 through the shell opening 15. The motor shaft 30 is connected to the vibrating lens 16 through the shell opening 15, and the rotation of the motor shaft 30 drives the rotation of the vibrating lens 16.

[0049] Further, such as Figures 2 to 3 As shown, the housing 10 is connected to an end cover 17, which is provided with a limiting groove 18. The motor shaft 30 is connected to a radially extending limiting pin 40, which is installed in the limiting groove 18. The maximum rotation angle of the motor shaft 30 is limited by the cooperation between the limiting pin 40 and the limiting groove 18.

[0050] Further, such as Figures 2 to 5 As shown, the shell 10 includes an upper shell 19, a middle shell 21, a lower shell 23 and a cover shell 24 which are connected in sequence along the axial direction through the shaft hole 12. A first cavity 11 is formed between the upper shell 19, the middle shell 21 and the lower shell 23. A first mounting groove 20 is provided on the side of the upper shell 19 facing the lower shell 23. The middle shell 21 is provided with a second mounting groove 22 which is positioned corresponding to the first mounting groove 20. The magnet assembly 70 includes a first magnet 71 and a second magnet 72. The upper end of the first magnet 71 is connected to the first mounting groove 20, and the second magnet 72 is installed in the second mounting groove 22 and connected to the upper end of the lower shell 23. The upper end of a second magnet 72 is arranged corresponding to the lower end of a first magnet 71. A second cavity 13 is formed between the lower shell 23 and the cover shell 24. The first magnet 71 is connected to the first mounting slot 20 and exposed toward the magnetic field air gap 73. The first mounting slot 20 provides a mounting space for the first magnet 71. The second magnet 72 is connected to the second mounting slot 22 and exposed toward the magnetic field air gap 73. The second mounting slot 22 provides a mounting space for the second magnet 72. The magnetic field air gap 73 is located between the first and second mounting slots 20, 22. The upper shell 19, middle shell 21, lower shell 23, and cover shell 24 are designed as separate parts, facilitating assembly and improving efficiency.

[0051] As one embodiment, Figures 2 to 5 As shown, the number of first mounting slots 20 is the same as the number of first sub-magnets, and the number of second mounting slots 22 is the same as the number of second sub-magnets. One first mounting slot 20 is corresponding to one second mounting slot 22. One first mounting slot 20 is connected to one first sub-magnet. By providing multiple first mounting slots 20, a spacing limit setting of multiple first sub-magnets is achieved, thereby improving the assembly position accuracy of the first sub-magnets. One second mounting slot 22 is connected to one second sub-magnet. By providing multiple second mounting slots 22, a spacing limit setting of multiple second sub-magnets is achieved, thereby improving the assembly position accuracy of the second sub-magnets.

[0052] As one embodiment, Figures 2 to 5 As shown, the upper shell 19 and the lower shell 23 are respectively made of soft magnetic materials with high magnetic permeability.

[0053] As one embodiment, Figures 2 to 5 As shown, the lower end of the second magnet 72 is connected to the lower shell 23, the upper shell 19 and the lower shell 23 have a magnetic conductivity, and the middle shell 21 only serves to limit and install the second magnet 72 and is not magnetic.

[0054] As one embodiment, Figure 4 as well as Figures 6 and 7As shown, the circuit board winding 50 includes a circuit board body 52 and a winding circuit 54. The winding circuit 54 includes a first circuit board winding 55 and a second circuit board winding 59. A through hole 53 is provided on the circuit board body 52. ​​The motor shaft 30 passes through the through hole 53. The circuit board body 52 is tightly connected to the motor shaft 30. The first circuit board winding 55 is connected to the first surface 56 of the circuit board body 52, and the second circuit board winding 59 is connected to the second surface 60 of the circuit board body 52. ​​The first circuit board winding 55 and the second circuit board winding 59 are made of high conductivity materials, such as copper. The first circuit board winding 55 is provided with a first winding connecting end 57 and a first terminal 58. The second circuit board winding 59 is provided with a second winding connecting end 61 and a second terminal 62. The first winding connecting end 57 and the second winding connecting end 61 is connected, thereby realizing the series connection of the first circuit board winding 55 and the second circuit board winding 59; the first terminal 58 and the second terminal 62 are respectively electrically connected to the second circuit board 85, realizing the electrical connection between the circuit board winding 50 and the second circuit board 85; a plurality of circumferentially spaced output areas are provided on the circuit board winding 50, and the output area is provided between the first magnet 71 and the second magnet 72 in the axial direction of the motor shaft 30, and the magnetic lines of force generated by the first magnet 71 and the second magnet 72 pass through the output area; the conductors of the first circuit board winding 55 and the second circuit board winding 59 extend in the radial direction of the motor shaft 30 in the output area to form an output arm 63; when the circuit board winding 50 is energized, the output arm 63 is subjected to the Ampere force in the circumferential direction under the action of the axial magnetic field, thereby generating a torque that rotates the motor shaft 30.

[0055] In summary, an embodiment of the present invention provides a high-speed scanning motor, in which a first cavity 11, a second cavity 13 and a rotating shaft hole 12 are provided in a shell 10. The first cavity 11 is connected to the second cavity 13 through the rotating shaft hole 12. The circuit board winding 50 is connected to the motor shaft 30. The magnet assembly 70 and the circuit board winding 50 are installed in the first cavity 11. The magnet assembly 70 and the circuit board winding 50 are matched in transmission. After the circuit board winding 50 is energized, the circuit board winding 50 can rotate relative to the magnet assembly 70 and drive the motor shaft 30 to rotate. The signal circuit assembly 80 is located in the second cavity 13 and includes a photoelectric receiving module 81, a grating disk 82, a light source 83, a first circuit board 84, and a second circuit board 85, arranged in axial order. The grating disk 82 is connected to the motor shaft 30. When the grating disk 82 rotates with the motor shaft 30, light emitted by the light source 83 passes through the gaps in the grating disk 82 and illuminates the photoelectric detection device on the photoelectric receiving module 81. The photoelectric detection device converts the received light signal into an electrical signal. The electrical signal is processed by the conversion circuit to obtain information about the rotation angle or speed of the motor shaft 30, thereby forming a feedback signal that is fed back to the drive circuit. The connecting wire 51 of the circuit board winding 50 passes through the shaft hole 12 and the circuit board connection hole 87 and is electrically connected to the second circuit board 85, thereby electrically connecting the circuit board winding 50, the second circuit board 85, the first circuit board 84, and the photoelectric receiving module 81. This makes the wiring of the circuit board winding 50 simpler and more reliable, improving the dynamic response performance of the motor while achieving higher precision.

[0056] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A high-speed scanning motor, characterized in that: The motor comprises a housing, a motor shaft, a circuit board winding, a magnet assembly, and a signal circuit assembly. The housing is axially provided with a first cavity, a shaft hole, and a second cavity that are sequentially connected. The motor shaft extends into the first cavity and the second cavity respectively through the shaft hole and is rotatably connected to the housing. The magnet assembly is fixed to the first cavity. The circuit board winding is rotatably mounted in the first cavity and coaxially connected to the motor shaft. The magnet assembly and the circuit board winding are transmission-coordinated. The signal circuit assembly is located in the second cavity, and the signal circuit assembly includes a photoelectric receiving module, a grating disk, a light source, a first circuit board and a second circuit board for an external drive circuit arranged in sequence along the axial direction. The grating disk is connected to the motor shaft, the photoelectric receiving module is electrically connected to the first circuit board, the first circuit board is electrically connected to the second circuit board, the first circuit board is provided with a circuit board connecting hole, the circuit board winding is connected to a connecting wire, and the connecting wire passes through the shaft hole and the circuit board connecting hole in sequence and is electrically connected to the second circuit board.

2. The high-speed scanning motor according to claim 1, wherein: The connecting line extends along the axial direction of the motor shaft.

3. The high-speed scanning motor according to claim 2, wherein: The motor shaft is provided with a side wire passing hole and an axial hole. The side wire passing hole is located on the circumferential side of the motor shaft. The side wire passing hole is connected to the axial hole. The axial hole extends to one end of the motor shaft facing the first circuit board. The connecting wire enters the axial hole from the side wire passing hole and extends out.

4. The high-speed scanning motor according to claim 3, wherein: The motor shaft protrudes radially to form a mounting step. The circuit board winding includes a circuit board body and a winding circuit. The winding circuit is connected to the circuit board body. The circuit board body is provided with a central through hole. The circuit board body is installed on the motor shaft through the central through hole. The motor shaft is connected to a shaft sleeve. The shaft sleeve is provided with a sleeve hole. The shaft sleeve is installed on the motor shaft through the sleeve hole. The circuit board body is located between the mounting step and the shaft sleeve. The shaft sleeve is connected to the mounting step through the circuit board body.

5. The high-speed scanning motor according to claim 4, characterized in that: The motor shaft is connected to a preload elastic member, the housing is provided with an elastic mounting groove opening toward the first cavity, one end of the sleeve facing the preload elastic member is connected to a second bearing, one end of the preload elastic member is connected to the elastic mounting groove, and the other end of the preload elastic member abuts against the second bearing.

6. The high-speed scanning motor according to claim 1, wherein: The signal circuit assembly also includes a connecting column connected to the shell, and the photoelectric receiving module, the first circuit board and the second circuit board are connected through the connecting column. The photoelectric receiving module is provided with a photoelectric detection device, and the light-emitting surface of the light source component faces the photoelectric detection device. The light source component is connected to the first circuit board.

7. The high-speed scanning motor according to claim 1, wherein: A tray is connected to one end of the motor shaft facing the signal circuit assembly, a tray slot is provided at one end of the tray facing the motor shaft, one end of the motor shaft is connected to the tray slot, a limiting boss is provided at one end of the tray facing the signal circuit assembly, the grating disk is provided with a grating through hole, the grating through hole is coaxially connected to the limiting boss, and the grating disk is provided with a light-transmitting hole for the light source component to transmit light.

8. The high-speed scanning motor according to claim 1, wherein: The shell is provided with a shell opening communicated with the first cavity, and the motor shaft is connected to the vibrating lens through the shell opening.

9. The high-speed scanning motor according to claim 1, wherein: The housing is connected to an end cover, the end cover is provided with a limiting groove, the motor shaft is connected to a limiting pin extending in the radial direction, and the limiting pin is installed in the limiting groove.

10. The high-speed scanning motor according to claim 1, wherein: The shell includes an upper shell, a middle shell, a lower shell and a cover shell which are connected in sequence along the axial direction through the rotating shaft hole, and the first cavity is formed between the upper shell, the middle shell and the lower shell, the upper shell is provided with a first mounting groove on the side facing the lower shell, and the middle shell is provided with a second mounting groove which is positioned corresponding to the first mounting groove, the magnet assembly includes a first magnet and a second magnet, the upper end of the first magnet is connected to the first mounting groove, the second magnet is installed in the second mounting groove and connected to the upper end of the lower shell, the upper end of one of the second magnets is arranged corresponding to the lower end of one of the first magnets, and the second cavity is formed between the lower shell and the cover shell.

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