A motor with a PCB coil structure

Abstract

The present invention discloses a motor with a PCB coil structure, which relates to the technical field of motors. The motor comprises a front cover and a rear cover serving as a stator component; a rotating shaft serving as a rotor component; and a first and a second disc-shaped induction magnet unit; the first and second induction magnet units are provided with a gap between them and are coaxially connected and fixed with the rotating shaft to form a rotor; and a PCB board coil, which is connected to the front cover and the rear cover to form a stator; the PCB board coil is arranged in the gap between the first and second induction magnet units; when the PCB board coil is energized, it generates a magnetic field, which interacts with the magnetic fields of the induction magnet units to drive the rotating shaft to rotate; the use of the PCB board coil simplifies the stator and rotor structures of the motor, breaks through the complex structure of traditional motors, reduces the manufacturing cost of the motor, and solves the problem that the existing motor structure is too complex and the motor manufacturing cost cannot be further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a motor with a PCB coil structure. Background Art

[0002] With the rapid development of industries like industrial automation and new energy vehicles, the performance and cost of motors, as core components of power systems, have become a focus of industry attention. Reducing overall motor costs while improving or maintaining performance is a complex issue. However, with current technology, the stator and rotor structures of traditional motors have matured, and the potential for cost optimization is nearing saturation.

[0003] In the construction of a stator or rotor, the coil is the most expensive component because it is made of copper wire. The number of turns and thickness of the coil directly affect the motor's speed and torque, which not only increases the weight and volume of the motor but also significantly increases the cost. Therefore, how to reduce the cost of the stator and coil in the motor has become an urgent problem to be solved.

[0004] The existing technology also mainly focuses on the improvement of the motor structure in the coil, such as:

[0005] (1) Optimizing coil structure to reduce losses: By changing the conductor spacing of the coil structure, the proximity effect losses caused by ripple current generated by the circulating frequency can be reduced. This effect is particularly significant in high-frequency applications. This optimization can reduce dependence on expensive high-frequency wires, thereby reducing costs.

[0006] (2) Potential control: Through specific coil structure design, parasitic capacitance and transient overvoltage can be controlled to avoid conductor insulation damage and coil short circuit, thereby improving the reliability of the motor.

[0007] (3) Improve current density: Flexible coil structure design can maximize the conductor heating surface and, combined with effective air cooling, achieve high current density and reduce motor size, weight and cost.

[0008] (4) Block Coil Bobbin Design: The block coil bobbin design simplifies the production process, improves production efficiency and quality, and reduces production costs. The block design allows each component of the motor to be precisely manufactured and tested before assembly, reducing the amount of adjustment and correction work during the assembly process.

[0009] (5) Improve the structure of coil components: By improving the structure of coil components, such as using spot welding to connect the lead-out piece and the coil tap, the firmness of the connection can be improved and the problem of disconnection during assembly can be avoided.

[0010] While existing technologies have made numerous improvements to motor coils, the primary structures of traditional motors, including stators, coils, and rotors, are relatively fixed and nearing their upper limits, making it difficult to achieve significant breakthroughs in motor cost and performance simply by optimizing traditional coil designs. The motor industry urgently needs to explore new structures, focusing on coil, stator, and rotor structures, to break through the bottlenecks of traditional motor design. The goal is to simplify the structure, reduce weight, improve performance, and lower costs without compromising motor performance.

[0011] In summary, it is found that the existing technology has at least the following technical problems:

[0012] The structure of existing motors is too complex and the cost of motor manufacturing cannot be further reduced. Summary of the Invention

[0013] The object of the present invention is to provide a motor with a PCB coil structure to solve the problem that the structure of the existing motor is too complicated and the manufacturing cost of the motor cannot be further reduced.

[0014] The various technical effects that can be produced by the preferred technical solutions among the various technical solutions provided by the present invention are described in detail below.

[0015] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0016] The present invention provides a motor with a PCB coil structure, which is composed of a front cover and a rear cover as a stator component; a rotating shaft as a rotor component; the front cover and the rear cover are detachable and combined, the rotating shaft is rotatably mounted in the rotating component shaft holes of the front cover and the rear cover, and one end of the rotating shaft passes through the front cover; and a first induction magnet unit and a second induction magnet unit in the shape of a disc; the first magnet component and the second magnet component are both provided with magnets on their facing sides, and a gap is provided between the first induction magnet unit and the second induction magnet unit, and they are coaxially connected and fixed to the rotating shaft; and a PCB board coil; the PCB board coil is provided with a W phase, U phase, and V phase of the PCB board coil, and are provided with corresponding connection holes; the outer periphery of the PCB board coil is connected and fixed to the front end cover and the rear end cover, and the two side surfaces of the PCB board coil are respectively in contact with the joint surfaces of the front end cover and the rear end cover; the rotating shaft passes through the axial hole of the PCB board coil, and the PCB board coil is arranged in the gap between the first induction magnet unit and the second induction magnet unit, and coils are provided on both sides of the PCB board coil; when the W phase, U phase, and V phase of the PCB board coil are energized, the PCB board coil generates a magnetic field, which interacts with the magnetic fields of the first induction magnet unit and the second induction magnet unit to drive the rotating shaft to rotate.

[0017] In one embodiment, the first induction magnet unit and the second induction magnet unit are both composed of a base plate and a plurality of sector magnets; a disc groove and an annular groove are respectively provided on both sides of the base plate, and a circle of mounting holes is provided on the outer side of the axial hole of the base plate; a plurality of symmetrically distributed protrusions are provided on the circumferential side of the disc groove; the inner ring of the annular groove is sleeved on the outside of a circle of the mounting holes; the outer ring inner circumferential wall and the inner ring outer circumferential wall of the annular groove are respectively provided with evenly arranged first arc protrusions and second arc protrusions, and the first arc protrusions are larger than the second arc protrusions, and the first arc protrusions and the second arc protrusions arranged opposite to each other form a group of blocking points, and the two adjacent groups of blocking points form a magnet accommodating cavity; the sector magnet is installed in the magnet accommodating cavity, and the magnetic poles of the sector magnet facing the outer side of the annular groove are N poles and S poles arranged alternately.

[0018] In one embodiment, the diameters of the first induction magnet unit and the second induction magnet group are smaller than the diameter of the PCB board coil; a connecting block is provided on the rotating shaft, and the two connecting blocks are provided with connecting through holes aligned with each other; the two base plates are passed through the connecting through holes through the mounting holes on one side by connecting screws, and reach and are threadedly connected to the mounting holes on the other side; the head and tail of the connecting screws respectively protrude into the disc groove of the base plate.

[0019] In one embodiment, a front sealing rubber ring is installed in the shaft hole of the front end cover, the outer ring of the front sealing rubber ring is sealed against the shaft hole of the front end cover, and the inner ring of the front sealing rubber ring is installed with a sealing ring that is sealed against the rotating shaft.

[0020] In one embodiment, two middle sealing rings are installed on the joint surface of the front cover and the rear cover, and the two middle sealing rings are respectively arranged on two joint surfaces that do not overlap on the axis; one of the middle sealing rings is arranged in the joint surface of the front cover that contacts the side of the PCB board coil.

[0021] In one embodiment, a rear sealing cover is installed in the shaft hole of the rear end cover, a sealing groove is provided on the outer side of the rear sealing cover, an O-shaped spring is installed in the sealing groove, and the outer ring of the sealing groove and the O-shaped spring are both sealed against the shaft hole of the rear end cover; the installation of the front sealing rubber ring, the middle sealing ring and the rear sealing cover forms a primary seal of the content space after the front end cover and the rear end cover are combined, which is used to prevent external oil from entering the interior of the front end cover and the rear end cover, and to prevent the first induction magnet unit, the second induction magnet unit and the PCB board coil from being stuck with grease.

[0022] In one embodiment, it also includes a solenoid valve and a guide tube; at least one outflow hole and at least one inflow hole are respectively provided on the peripheral walls of the front end cover and the rear end cover, for controlling the outflow of fluid in the content space of the front end cover and the rear end cover, and controlling the internal pressure to avoid internal fluid accumulation and causing a short circuit of the PCB board coil; the outflow hole and the inflow hole are both provided at the lower part of the front end cover and the rear end cover when they are placed horizontally; the guide tube is installed in the outflow hole and the inflow hole, and the guide tube is connected to the solenoid valve, for controlling the opening and closing of the outflow hole and the inflow hole, forming a secondary dynamic seal.

[0023] In one embodiment, two circles of mounting grooves are provided on the circumference of the rotating shaft, and the two mounting grooves are respectively adjacent to the rotating assembly of the front cover and the rotating assembly of the rear cover; an axial retaining ring is installed in the mounting groove.

[0024] In one embodiment, the rotating assembly includes a first rotating member and a second rotating member; the first rotating member is mounted in the stepped hole of the front end cover and is coaxial with the axial hole of the front end cover; one end of the rotating shaft passes through the axial hole of the first rotating member; the second rotating member is mounted in the stepped hole of the rear end cover and is coaxial with the axial hole of the rear end cover; the other end of the rotating shaft passes through the axial hole of the second rotating member; the first rotating member and the second rotating member each comprise a retaining plate, a bearing, and at least two pressure sensors; the retaining plate has an axial hole and a bearing groove on one side of the retaining plate, and the bearing is mounted in the bearing groove; the outer ring of the retaining plate has detection holes extending through both sides, and the plurality of detection holes are evenly arranged around the circumference of the retaining plate; the pressure sensor is mounted in the detection holes, and a probe end of the pressure sensor extends through the detection hole and contacts the axial retaining ring to detect axial displacement of the rotating shaft during rotation; when the first rotating member and the second rotating member are mounted, the two bearings face the inner end faces of the stepped hole of the front end cover and the inner end faces of the stepped hole of the rear end cover, respectively.

[0025] In one embodiment, a plurality of arc holes are provided on the outer circumference of the PCB board coil, and a first through hole and a first screw hole are respectively provided on the front end cover and the rear end cover corresponding to the arc holes. The PCB board coil is connected and fixed by screws passing through the first through hole and the arc hole in sequence to the first screw hole.

[0026] The beneficial effects of the present invention are as follows:

[0027] This invention optimizes the traditional motor structure and cost in many aspects by introducing a PCB coil structure, providing a new technology for motor design. Specifically, the traditional wound coil is transformed into a PCB coil and the coil is integrated on the PCB substrate. This design solution:

[0028] First, the application of PCB board coils greatly simplifies the internal structure of the motor. Traditional motor coils are usually made of copper wire, requiring multi-layer windings and complex coil arrangements, which not only leads to numerous process steps, but also requires complex assembly technology to ensure the uniformity of the windings and the accuracy of the position. The technical solution of the present invention, by integrating the coils on the PCB substrate, can eliminate the tedious steps of the traditional winding process, reduce the difficulty of the production process, and reduce the time and labor costs required for the process, thereby improving production efficiency. In addition, due to the simple structure of the PCB board coil and based on mature semiconductor production equipment and processes, the production process of the PCB board coil has good repeatability and consistency, making it easy for automated production lines to achieve high-precision and high-quality production of PCB board coil components, which helps to improve the quality stability of the motor.

[0029] Secondly, the structural design of the motor of the present invention further reduces the size of the motor and the material cost of manufacturing; the use of PCB board coils significantly reduces the demand for copper wire in traditional motors; the conductor pattern can be precisely laid out on the PCB board, thereby replacing the heavy coil windings in traditional motors. The precise wiring design can also reduce the impact of the quality of the coil components on the shape of the coil wire group, thereby optimizing the magnetic field distribution of the coil and reducing material costs at the same time; the PCB board coil has a light and thin structure, and its volume and weight are greatly reduced compared to traditional winding coils, making the motor as a whole more miniaturized and lightweight. Compared with traditional motors, it also saves components such as the stator core, winding coils, and cast aluminum rotors, thereby saving material costs from the perspective of simplifying the structure, which is conducive to meeting the market demand for miniaturized and high-efficiency motors and further highlights the cost advantage of the new product.

[0030] Furthermore, the rotor assembly, formed by the combination of the first and second induction magnet units and the rotating shaft, and the PCB coil, further address the energy conversion efficiency issues inherent in conventional motor designs. By designing the PCB coil with independently distributed W, U, and V phases on a plane, and connecting these three phases directly to the coils via external wires through connection holes, the PCB coil achieves more precise phase control. When the motor is energized, the PCB coil generates a continuously changing, stable magnetic field, interacting efficiently with the magnetic fields of the first and second induction magnet units in the rotor assembly, thereby achieving efficient rotation of the motor shaft. The PCB coil's placement between the first and second induction magnet units, along with the coil's phase structure, allows for more precise control of the PCB coil's current, reducing electromagnetic energy loss and significantly improving the motor's energy conversion efficiency. This is particularly impressive in low-power, high-precision motor applications.

[0031] The motor's power structure, consisting solely of a first induction magnet unit, a second induction magnet unit, and a PCB coil, significantly improves the motor's ease of installation and maintenance. The PCB coil is directly integrated into the motor's stator assembly, comprised of a front and rear cover, making the motor more compact and reducing the number of stator core components typically found in traditional motors. The front and rear covers are detachably connected to the rotating shaft, making assembly and disassembly more convenient and simplifying maintenance. This design significantly reduces maintenance costs associated with traditional motors, particularly in automated equipment requiring frequent maintenance or component replacement.

[0032] In summary, the present invention simplifies the structure of the motor, reduces the material, assembly and maintenance costs through the stator assembly composed of the PCB board coil and the front cover and the rear cover, and the rotor assembly composed of the first induction magnet unit, the second induction magnet unit and the rotating shaft, and has a significant effect in improving energy efficiency and convenience. It not only meets the needs of reducing costs and increasing efficiency of traditional motors, but also provides a new option in the field of high-performance and miniaturized motors, bringing a new technical path for the future development of the motor industry. This technology is applicable to multiple application fields such as consumer electronics, automobiles, and industrial automation, and can achieve efficient operation in multiple scenarios. Ultimately, the present invention can not only reduce the production and material costs of the motor, but also improve the market competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for use in the implementation. Obviously, the drawings described below are only some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 This is a schematic diagram of the motor assembly according to the first embodiment of the present invention;

[0035] Figure 2 1 is a schematic top view of the PCB coil according to the first embodiment of the present invention;

[0036] Figure 3 This is a schematic cross-sectional view of the motor structure according to the first embodiment of the present invention;

[0037] Figure 4 1 is a schematic cross-sectional view of a base plate and a sector magnet assembly according to a first embodiment of the present invention;

[0038] Figure 5 1 is a schematic structural diagram of a base plate and a magnetic pole surface of a sector magnet according to a first embodiment of the present invention;

[0039] Figure 6 This is a schematic structural diagram of the rotating shaft of the first embodiment of the present invention;

[0040] Figure 7 1 is a schematic diagram of the assembly of the stator assembly of the first embodiment of the present invention;

[0041] Figure 8 is a cross-sectional view of a primary sealing structure according to a second embodiment of the present invention;

[0042] Figure 9 is a cross-sectional view of a secondary dynamic sealing structure according to a second embodiment of the present invention;

[0043] Figure 10 It is a schematic cross-sectional structural diagram of the rotating assembly of the third embodiment of the present invention.

[0044] The accompanying drawings are numerals as follows:

[0045] 1. Stator assembly;

[0046] 2. Front cover; 21. Front sealing rubber ring; 211. Sealing ring; 22. Outflow hole; 23. Inflow hole; 24. First through hole;

[0047] 3. Rear end cover; 31. Middle sealing ring; 32. Rear sealing cover; 321. Sealing groove; 322. O-shaped spring; 33. First screw hole;

[0048] 4. PCB board coil; 41. PCB substrate; 42. Three-phase coil; 43. Connection hole; 44. Arc hole;

[0049] 5. Rotor assembly;

[0050] 6. Rotating shaft; 61. Connecting block; 611. Connecting through hole; 62. Mounting groove; 621. Axial retaining ring;

[0051] 71. First induction magnet unit; 72. Second induction magnet unit;

[0052] 81. Base plate; 811. Disc groove; 812. Bump; 813. Annular groove; 814. Mounting hole; 82. Blocking point; 821. First arc convex point; 822. Second arc convex point; 83. Magnet accommodating cavity; 84. Sector magnet;

[0053] 9. Rotating assembly; 91. First rotating member; 92. Second rotating member; 93. Bearing plate; 931. Shaft hole; 932. Bearing groove; 933. Detection hole; 94. Bearing; 95. Pressure sensor;

[0054] 10. Solenoid valve; 101. Flow guide tube. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0056] A specific embodiment provides a motor with a PCB coil structure, which effectively solves the problem that the structure of existing motors is too complex and the manufacturing cost of the motor cannot be further reduced.

[0057] In addition, all the contents of the configurations shown in the following embodiments are not necessarily essential as the solution to the invention described in the claims.

[0058] The first embodiment of a motor with a PCB coil structure is as follows Figures 1 to 3 As shown, it is composed of a front cover 2 and a rear cover 3 as a stator component 1; a rotating shaft 6 as a rotor component 5; the front cover 2 and the rear cover 3 are detachable and combined, and the rotating shaft 6 is rotatably mounted on the rotating component 9 shaft hole 931 of the front cover 2 and the rear cover 3, and one end of the rotating shaft 6 passes through the front cover 2; and a disc-shaped first induction magnet unit 71 and a second induction magnet unit 72; magnets are provided on the facing sides of the first magnet component and the second magnet component, and a gap is provided between the first induction magnet unit 71 and the second induction magnet unit 72, and they are coaxially connected and fixed with the rotating shaft 6; and a PCB board coil 4; the PCB board coil 4 is provided with W phase and U phase , V phase, and are provided with corresponding connecting holes 43; the outer periphery of the PCB board coil 4 is connected and fixed to the front end cover 2 and the rear end cover 3, and the two side surfaces of the PCB board coil 4 are respectively abutted against the joint surfaces of the front end cover 2 and the rear end cover 3; the rotating shaft 6 passes through the axial hole 931 of the PCB board coil 4, and the PCB board coil 4 is arranged in the gap between the first induction magnet unit 71 and the second induction magnet unit 72, and there are coils on both sides of the PCB board coil 4; when the W phase, U phase, and V phase of the PCB board coil 4 are energized, the PCB board coil 4 generates a magnetic field, and interacts with the magnetic fields of the first induction magnet unit 71 and the second induction magnet unit 72, driving the rotating shaft 6 to rotate.

[0059] Among them, the specific structure of the PCB board coil 4 is that the PCB board coil 4 includes two parts: a PCB substrate 41 and a three-phase coil 42. The three-phase coils 42 are provided on both sides of the PCB substrate 41. The same group of coils are arranged on the PCB substrate 41, and the coils protrude from the two sides of the PCB substrate 41. Insulating varnish is sprayed or dipped on the surface of the PCB substrate 41 and the coils. The connecting holes 43 are passed through the PCB substrate 41 by a conductive sleeve. The three connecting holes 43 are electrically connected to the coils of the W phase, U phase, and V phase respectively. The end faces of both sides of the connecting holes 43 are not provided with insulating varnish.

[0060] The present invention optimizes the structure and cost of traditional motors in many aspects by introducing a PCB coil 4 structure, providing a new technology for motor design. Specifically, the traditional wound coil is transformed into a PCB coil 4, and the coil is integrated on the PCB substrate 41. This design solution:

[0061] First, the application of the PCB board coil 4 greatly simplifies the internal structure of the motor; traditional motor coils are usually wound with copper wire, requiring multi-layer windings and complex coil arrangements, which not only leads to numerous process steps, but also requires complex assembly technology to ensure the uniformity of the winding and the accuracy of the position; the technical solution of the present invention, by integrating the coil on the PCB substrate 41, can eliminate the cumbersome steps of the traditional winding process, reduce the difficulty of the production process, reduce the time and labor costs required for the process, and thus improve production efficiency; in addition, due to the simple structure of the PCB board coil 4 and based on mature semiconductor production equipment and processes, the production process of the PCB board coil 4 has good repeatability and consistency, so that the automated production line can easily achieve high-precision and high-quality production of the PCB board coil 4 components, which helps to improve the quality stability of the motor.

[0062] Secondly, the structural design of the motor of the present invention further reduces the size of the motor and the material cost of manufacturing; the use of the PCB board coil 4 significantly reduces the demand for copper wire in traditional motors; the conductor pattern can be accurately laid out on the PCB board, thereby replacing the heavy coil windings in traditional motors. The precise wiring design can also reduce the impact of the quality of the coil components on the shape of the coil wire group, thereby optimizing the magnetic field distribution of the coil and reducing material costs at the same time; the PCB board coil 4 has a light and thin structure, and its volume and weight are greatly reduced compared to traditional winding coils, making the motor as a whole more miniaturized and lightweight. Compared with traditional motors, it also saves components such as the stator core, winding coil, and cast aluminum rotor, thereby saving material costs from the perspective of simplifying the structure, which is conducive to meeting the market demand for miniaturized and high-efficiency motors, and further highlights the cost advantage of the new product.

[0063] Furthermore, the rotor assembly 5, formed by the combination of the first induction magnet unit 71, the second induction magnet unit 72, and the rotating shaft 6, and the PCB coil 4, further address the energy conversion efficiency issues inherent in conventional motor designs. By designing the PCB coil 4 with independently distributed W, U, and V phases, and connecting these three phases directly to the coils via external wires through connection holes 43, more precise phase control of the PCB coil 4 is achieved. When the motor is energized, the PCB coil 4 generates a continuously varying and stable magnetic field, which efficiently interacts with the magnetic fields of the first and second induction magnet units 71, 72 in the rotor assembly 5, thereby achieving efficient rotation of the motor shaft 6. The placement of the PCB coil 4 between the first and second induction magnet units 71, 72, and the phase structure of the coils enable more precise control of the current flowing through the PCB coil 4, reducing electromagnetic energy loss and significantly improving the motor's energy conversion efficiency. This is particularly effective in low-power, high-precision motor applications.

[0064] The motor's power structure, consisting solely of the first induction magnet unit 71, the second induction magnet unit 72, and the PCB coil, significantly improves the ease of installation and maintenance. The PCB coil 4 is directly integrated into the motor stator assembly 1, consisting of the front cover 2 and rear cover 3. This makes the motor structure more compact and reduces the number of stator core components found in traditional motors. The front cover 2 and rear cover 3 are detachably coupled to the rotating shaft 6, making assembly and disassembly of the motor more convenient and simplifying maintenance. This design effectively reduces the maintenance costs associated with traditional motors, particularly in automated equipment requiring frequent maintenance or component replacement.

[0065] In summary, the present invention simplifies the structure of the motor, reduces the material, assembly and maintenance costs, and has significant effects on improving energy efficiency and convenience through the stator assembly 1 composed of the PCB board coil 4, the front cover 2, and the rear cover 3, and the rotor assembly 5 composed of the first induction magnet unit 71, the second induction magnet unit 72, and the rotating shaft 6. It not only meets the needs of reducing costs and increasing efficiency of traditional motors, but also provides a new option in the field of high-performance and miniaturized motors, bringing a new technical path for the future development of the motor industry. This technology is applicable to multiple application fields such as consumer electronics, automobiles, and industrial automation, and can achieve efficient operation in multiple scenarios. Ultimately, the present invention can not only reduce the production and material costs of the motor, but also improve the market competitiveness of the product.

[0066] As one optional implementation method,

[0067] Regarding the structure of the rotating assembly 9 and the matching structure with the rotating shaft 6, the front cover 2 and the rear cover 3, this embodiment is as follows. Figure 1 and Figure 3 As shown, the rotating assembly 9 includes a first rotating member 91 and a second rotating member 92; the first rotating member 91 is installed in the stepped hole of the front end cover 2 and is coaxial with the axial hole 931 of the front end cover 2; one end of the rotating shaft 6 passes through the axial hole 931 of the first rotating member 91; the second rotating member 92 is installed in the stepped hole of the rear end cover 3 and is coaxial with the axial hole 931 of the rear end cover 3; the other end of the rotating shaft 6 passes through the axial hole 931 of the second rotating member 92.

[0068] Regarding the specific structures of the first induction magnet unit 71 and the second induction magnet unit 72, this embodiment Figures 3 to 5As shown, the first induction magnet unit 71 and the second induction magnet unit 72 are both composed of a base plate 81 and a plurality of sector magnets 84; a disc groove 811 and an annular groove 813 are respectively provided on both sides of the base plate 81, and a circle of mounting holes 814 is provided on the outer side of the axial hole 931 of the base plate 81; a plurality of symmetrically distributed protrusions 812 are provided on the circumference of the disc groove 811; the inner ring of the annular groove 813 is sleeved on the outer side of the circle of mounting holes 814; the inner circumferential wall of the outer ring of the annular groove 813 and the outer circumferential wall of the inner ring are respectively There are provided with evenly arranged first arc protrusions 821 and second arc protrusions 822, and the first arc protrusions 821 are larger than the second arc protrusions 822. The first arc protrusions 821 and the second arc protrusions 822 arranged in alignment with each other form a group of blocking points 82, and the two adjacent groups of blocking points 82 form a magnet accommodating cavity 83; the sector magnet 84 is installed in the magnet accommodating cavity 83, and the magnetic poles of the sector magnet 84 facing the outside of the annular groove 813 are N poles and S poles arranged alternately at intervals.

[0069] Regarding the matching structure of the first induction magnet unit 71, the second induction magnet unit 72, the PCB board coil 4, and the rotating shaft 6, this embodiment is as follows: Figures 3 to 6 As shown, the diameters of the first induction magnet unit 71 and the second induction magnet group are smaller than the diameter of the PCB board coil 4; a connecting block 61 is provided on the rotating shaft 6, and the two connecting blocks 61 are provided with connecting through holes 611 aligned with each other; the two base plates 81 pass through the connecting through holes 611 through the mounting holes 814 on one side through the connecting screws, reach and are threadedly connected to the mounting holes 814 on the other side; the head and tail of the connecting screws respectively protrude into the disc groove 811 of the base plate 81.

[0070] Regarding the mounting structure of the PCB coil 4 and the front cover 2 and the rear cover 3, this embodiment is as follows. Figure 7 As shown, a plurality of arc holes 44 are provided on the outer circumference of the PCB board coil 4, and a first through hole 24 and a first screw hole 33 are respectively provided at the front end cover 2 and the rear end cover 3 corresponding to the arc holes 44. The screws are sequentially passed through the first through hole 24 and the arc hole 44 to reach the first screw hole 33 to connect and fix the PCB board coil 4.

[0071] The second embodiment of the motor with PCB coil structure is as follows Figure 8 As shown, the difference between this embodiment and the first embodiment is that a front sealing rubber ring 21 is installed in the shaft hole 931 of the front end cover 2, the outer ring of the front sealing rubber ring 21 is sealed against the shaft hole 931 of the front end cover 2, and the inner ring of the front sealing rubber ring 21 is installed with a sealing ring 211 which is sealed against the rotating shaft 6.

[0072] Two middle sealing rings 31 are installed on the joint surface of the front cover 2 and the rear cover 3. The two middle sealing rings 31 are respectively arranged on two joint surfaces that do not overlap on the axis; one of the middle sealing rings 31 is arranged in the joint surface of the front cover 2 that contacts the side of the PCB board coil 4.

[0073] A rear sealing cover 32 is installed in the shaft hole 931 of the rear end cover 3. A sealing groove 321 is provided on the outer side of the rear sealing cover 32. An O-shaped spring 322 is installed in the sealing groove 321. The outer ring of the sealing groove 321 and the O-shaped spring 322 are both sealed against the shaft hole 931 of the rear end cover 3.

[0074] During application, the installation of the front sealing rubber ring 21, the middle sealing ring 31 and the rear sealing cover 32 forms a primary seal of the content space after the front cover 2 and the rear cover 3 are combined, which is used to prevent external oil from entering the interior of the front cover 2 and the rear cover 3, and to prevent the first induction magnet unit 71, the second induction magnet unit 72 and the PCB board coil 4 from being stuck with grease.

[0075] The above-mentioned primary sealing structure forms a seal inside the electrode, which can prevent grease from affecting the magnetic field of the sector magnet 84 in a physical barrier manner; at the same time, it also avoids affecting the insulation performance of the PCB board coil 4, prevents current leakage from causing circuit failure, and reduces the loss of electrical signal transmission.

[0076] Although the primary sealing mechanism can effectively prevent the liquid outside the motor from entering the motor, the components inside the motor also need to be lubricated regularly and quantitatively to solve this problem. Figure 9 As shown, the arrangement includes a solenoid valve 10 and a flow guide tube 101; at least one outflow hole 22 and at least one inflow hole 23 are respectively provided on the peripheral walls of the front end cover 2 and the rear end cover 3, for controlling the outflow of the fluid in the content space of the front end cover 2 and the rear end cover 3, and controlling the internal pressure to avoid internal fluid accumulation and causing a short circuit of the PCB board coil 4; the outflow hole 22 and the inflow hole 23 are both arranged at the lower part of the front end cover 2 and the rear end cover 3 when they are placed horizontally; the flow guide tube 101 is installed in the outflow hole 22 and the inflow hole 23, and the flow guide tube 101 is connected to the solenoid valve 10, for controlling the opening and closing of the outflow hole 22 and the inflow hole 23, forming a secondary dynamic seal.

[0077] During application, magnetic liquid is introduced into the outlet hole 22 and the inlet hole 23 through the solenoid valve 10 and the guide tube 101, and then filtered clean air with constant pressure is introduced when the motor is started, so as to realize oil and gas lubrication of the internal rotating elements of the motor, such as the bearings 94 and the rotating shaft 6 of the first rotating part 91 and the second rotating part 92, reduce the friction of the rotating elements and reduce wear. The selection of magnetic liquid can achieve lubrication while preventing the liquid from covering the surface of the PCB board coil 4 and the sector magnet 84 to form a physical barrier; after completing the regular lubrication, the outlet hole 22 and the inlet hole 23 can be opened, and air can be introduced from the inlet hole 23 to blow out the internal liquid or dust generated by component wear from the outlet hole 22.

[0078] The third embodiment of the motor with PCB coil structure is as follows Figure 10As shown, the difference between this embodiment and the first embodiment is that two circles of mounting grooves 62 are provided on the circumference of the rotating shaft 6, and the two mounting grooves 62 are respectively adjacent to the rotating assembly 9 of the front cover 2 and the rotating assembly 9 of the rear cover 3; an axial retaining ring 621 is installed in the mounting groove 62.

[0079] After long-term use of the motor, its rotating shaft 6, the bearing 94 of the rotating component, or the axial retaining ring 621 used to prevent the rotating shaft 6 from axially positioning will wear during rotation, causing the axial displacement of the rotating shaft 6 to increase, thereby affecting the distance between the PCB board coil 4 and the base plates 81 on both sides. When the axial displacement is greater than the distance between the PCB board coil 4 and the base plates 81 on both sides, there is a problem that the insulation layer of the PCB board coil 4 is worn off by the base plates 81, or even the PCB board coil 4 is damaged by the base plates 81, thereby accelerating the progress of motor failure.

[0080] Furthermore, the first rotating member 91 and the second rotating member 92 are respectively composed of a bearing plate 93, a bearing 94 and at least two pressure sensors 95; the bearing plate 93 is provided with an axial hole 931, and a bearing groove 932 is provided on one side of the bearing plate 93, and the bearing 94 is installed in the bearing groove 932; detection holes 933 are provided on the outer ring of the bearing plate 93, which pass through the two side surfaces, and multiple detection holes 933 are evenly arranged on the circumference of the bearing plate 93; the pressure sensor 95 is installed in the detection hole 933, and the probe end of the pressure sensor 95 extends out of the detection hole 933 and contacts the axial retaining ring 621, which is used to detect the axial displacement of the rotating shaft 6 during rotation; when the first rotating member 91 and the second rotating member 92 are installed, the two bearings 94 face the inner end face of the stepped hole of the front end cover 2 and the inner end face of the stepped hole of the rear end cover 3, respectively.

[0081] During application, the axial displacement of the reaction diaphragm deformation is calculated based on the pressure of the axial retaining ring 621 contacted by the pressure sensor 95 and the pressure deformation coefficient of the reaction diaphragm in the pressure sensor 95, thereby obtaining the axial displacement of the rotating shaft 6. Both the front end cover 2 and the rear end cover 3 are provided with pressure sensors 95. The pressure feedback from the two axial retaining rings 621 to the pressure sensor 95 on the front end cover 2 or the rear end cover 3 can detect the axial displacement direction of the rotating shaft 6. After obtaining the axial displacement amount and direction of the rotating shaft 6, the axial displacement amount and displacement direction of the rotating shaft 6 can be adjusted by controlling the frequency of increasing or decreasing the rotation speed of the rotating shaft 6 or controlling the acceleration of the rotating shaft 6, thereby avoiding the first induction magnet unit 71 and the second induction magnet unit 72 from contacting the PCB board coil 4 during rotation, which causes the insulation layer on the surface of the PCB board coil 4 to wear, thereby extending the life of the motor.

[0082] The fourth embodiment of the motor with a PCB coil structure is different from the first embodiment in that a raceway is provided on the axial retaining ring 621; a ball is provided at the end of the probe end of the pressure sensor 95, and the ball is in contact with the raceway. When the rotating shaft 6 rotates and the axial retaining ring 621 also rotates, the circumferential stress on the pressure sensor 95 can be reduced, thereby preventing damage to the pressure sensor 95 and reducing the wear of the probe end of the pressure sensor 95 and the axial retaining ring 621.

[0083] The technical features of the above embodiments may be combined arbitrarily. To simplify the description, not all possible combinations of the technical features in the above embodiments are described.

Claims

1. A motor with a PCB coil structure, characterized in that: The invention comprises a front cover and a rear cover as a stator assembly; a rotating shaft as a rotor assembly; the front cover and the rear cover are detachable and combined, the rotating shaft is rotatably mounted in the rotating assembly shaft hole of the front cover and the rear cover, and one end of the rotating shaft passes through the front cover; and a first disc-shaped induction magnet unit and a second induction magnet unit; the first induction magnet unit and the second induction magnet unit are both provided with magnets on the facing sides, and a gap is provided between the first induction magnet unit and the second induction magnet unit, and are coaxially connected and fixed with the rotating shaft; and a PCB board coil; the PCB board coil is provided with W phase, U phase, V phase, and provided with corresponding connection holes; the outer periphery of the PCB board coil is connected and fixed to the front end cover and the rear end cover, and the two side surfaces of the PCB board coil respectively abut against the joint surfaces of the front end cover and the rear end cover; the rotating shaft passes through the axial hole of the PCB board coil, the PCB board coil is arranged in the gap between the first induction magnet unit and the second induction magnet unit, and coils are provided on both sides of the PCB board coil; when the W phase, U phase, and V phase of the PCB board coil are energized, the PCB board coil generates a magnetic field, which interacts with the magnetic fields of the first induction magnet unit and the second induction magnet unit to drive the rotating shaft to rotate; The first induction magnet unit and the second induction magnet unit are both composed of a base plate and a plurality of sector magnets; a disc groove and an annular groove are respectively provided on both sides of the base plate, and a circle of mounting holes is provided on the outer side of the axial hole of the base plate; a plurality of symmetrically distributed protrusions are provided on the circumferential side of the disc groove; the inner ring of the annular groove is sleeved on the outside of a circle of the mounting holes; the outer ring inner circumferential wall and the inner ring outer circumferential wall of the annular groove are respectively provided with evenly arranged first arc convex points and second arc convex points, and the first arc convex points are larger than the second arc convex points, and the first arc convex points and the second arc convex points arranged opposite to each other are a group of blocking points, and the two adjacent groups of blocking points form a magnet accommodating cavity; the sector magnet is installed in the magnet accommodating cavity, and the magnetic poles of the sector magnet facing the outer side of the annular groove are N poles and S poles arranged alternately at intervals; A front sealing rubber ring is installed in the shaft hole of the front end cover, the outer ring of the front sealing rubber ring is in sealing contact with the shaft hole of the front end cover, and a sealing ring is installed in the inner ring of the front sealing rubber ring in sealing contact with the rotating shaft; Two middle sealing rings are installed on the joint surface of the front cover and the rear cover, and the two middle sealing rings are respectively arranged on two joint surfaces that do not overlap on the axis; one of the middle sealing rings is arranged in the joint surface of the front cover that contacts the side surface of the PCB board coil; A rear sealing cover is installed in the shaft hole of the rear end cover, and a sealing groove is provided on the outer side of the rear sealing cover. An O-shaped spring is installed in the sealing groove. The outer ring of the sealing groove and the O-shaped spring are both in sealing contact with the shaft hole of the rear end cover; the installation of the front sealing rubber ring, the middle sealing ring and the rear sealing cover forms a primary seal of the content space after the front end cover and the rear end cover are combined, which is used to prevent external oil from entering the interior of the front end cover and the rear end cover, and to prevent the first induction magnet unit, the second induction magnet unit and the PCB board coil from being stuck with grease; It also includes a solenoid valve and a flow guide pipe; at least one outflow hole and at least one inflow hole are respectively provided on the peripheral walls of the front cover and the rear cover, for controlling the outflow of fluid in the content space of the front cover and the rear cover, and controlling the internal pressure to prevent internal fluid accumulation from causing a short circuit of the PCB board coil; the outflow hole and the inflow hole are both provided at the lower part of the front cover and the rear cover when they are placed horizontally; the flow guide pipe is installed in the outflow hole and the inflow hole, and the flow guide pipe is connected to the solenoid valve, for controlling the opening and closing of the outflow hole and the inflow hole to form a secondary dynamic seal; Two mounting grooves are provided on the circumference of the rotating shaft, and the two mounting grooves are respectively adjacent to the rotating assembly of the front cover and the rotating assembly of the rear cover; an axial retaining ring is installed in the mounting groove; The rotating assembly includes a first rotating member and a second rotating member. The first rotating member is mounted in the stepped hole of the front end cover and is coaxial with the axial hole of the front end cover. One end of the rotating shaft passes through the axial hole of the first rotating member. The second rotating member is mounted in the stepped hole of the rear end cover and is coaxial with the axial hole of the rear end cover. The other end of the rotating shaft passes through the axial hole of the second rotating member. The first rotating member and the second rotating member each comprise a retaining plate, a bearing, and at least two pressure sensors. The retaining plate has an axial hole and a bearing groove on one side of the retaining plate, and the bearing is mounted in the bearing groove. The outer ring of the retaining plate is provided with detection holes extending through both sides, and a plurality of detection holes are evenly arranged around the circumference of the retaining plate. The pressure sensor is mounted in the detection hole, and the probe end of the pressure sensor extends through the detection hole and contacts the axial retaining ring to detect axial displacement of the rotating shaft during rotation. When the first rotating member and the second rotating member are mounted, the two bearings face the inner end faces of the stepped hole of the front end cover and the inner end faces of the stepped hole of the rear end cover, respectively.

2. The motor with a PCB coil structure according to claim 1, characterized in that: The diameters of the first induction magnet unit and the second induction magnet unit are smaller than the diameter of the PCB coil; a connecting block is provided on the rotating shaft, and connecting through holes aligned with each other are provided on the two connecting blocks; The two base plates are connected by connecting screws through the mounting hole on one side and the connecting through hole to reach and be threadedly connected with the mounting hole on the other side; the head and tail of the connecting screws respectively protrude into the disc groove of the base plate.

3. The motor with a PCB coil structure according to claim 1, characterized in that: A plurality of arc holes are provided on the outer circumference of the PCB board coil, and a first through hole and a first screw hole are respectively provided on the front end cover and the rear end cover corresponding to the arc holes. The PCB board coil is connected and fixed by screws passing through the first through hole and the arc hole in sequence and reaching the first screw hole.

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