Motor with PCB coil structure

Abstract

The invention discloses a motor with a PCB (printed circuit board) coil structure, and relates to the technical field of motors. A rotating shaft as the rotor assembly; the first induction magnet unit and the second induction magnet unit are disc-shaped; a gap is formed between the first induction magnet unit and the second induction magnet unit, and the first induction magnet unit and the second induction magnet unit are coaxially connected and fixed with the rotating shaft to form a rotor; the PCB coil is connected with the front end cover and the rear end cover to form a stator; the PCB coil is arranged in a gap between the first induction magnet unit and the second induction magnet unit; the PCB coil is electrified to generate a magnetic field which interacts with the magnetic field of the induction magnet unit to drive the rotating shaft to rotate; the application of the PCB coil enables the stator and rotor structures of the motor to be simplified, breaks through the complex structure of a traditional motor, enables the manufacturing cost of the motor to be reduced, and solves the problems that the structure of an existing motor is too complex, and the manufacturing cost of the motor 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 such as industrial automation and new energy vehicles, the performance and cost of motors, as core components of power devices, have become the focus of industry attention. Reducing the overall cost of motors while improving or maintaining motor performance is a complex issue, but at the current level of technology, the stator and rotor structures of traditional motors have become mature, and the space for cost optimization has approached saturation.

[0003] In the construction of the stator or rotor, the coil is the most expensive part because it is made of copper wire. The number of turns and thickness of the coil directly affect the speed and torque of the motor, 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) Optimize coil structure to reduce losses: By changing the conductor spacing of the coil structure, the proximity effect loss caused by ripple current generated by the cyclic frequency can be reduced, which is particularly effective in high-frequency applications. This optimization can reduce the reliance 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 frame design: The block coil frame 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 accurately manufactured and tested before assembly, reducing the amount of adjustment and correction work during the assembly process.

[0009] (5) Improve the structure of the coil component: By improving the structure of the coil component, 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] Although existing technologies have made many auxiliary improvements to motor coils, since the main structures of traditional motors in stator, coil and rotor design are relatively fixed and close to the upper limit of optimization, it is difficult to achieve significant breakthroughs in motor cost and performance simply by optimizing traditional coil design. The motor industry urgently needs to explore new structures starting from coil structure, stator structure and rotor structure to break the bottleneck of traditional motor structure design. It is necessary to achieve the goals of simplifying structure, reducing weight, improving performance and reducing cost without affecting motor performance.

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

[0012] The existing motor has an overly complex structure and the motor manufacturing cost cannot be further reduced. Summary of the invention

[0013] The purpose 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 disc-shaped first induction magnet unit and a second induction magnet unit; magnets are arranged on the facing sides of the first magnet component and the second magnet component, and a gap is arranged between the first induction magnet unit and the second induction magnet unit, and they are coaxially connected and fixed with the rotating shaft; and a PCB board coil; the PCB board coil is provided with a W phase, U phase, V phase, and are provided with corresponding connecting 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 abutted 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 the two side surfaces of the PCB board coil are provided with coils; when the W phase, U phase, and V phase of the PCB board coil are energized, the PCB board coil generates a magnetic field, and 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 of the embodiments, 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 circle of the annular groove is sleeved outside a circle of the mounting holes; the outer circle inner circumferential wall and the inner circle outer circumferential wall of the annular groove are respectively provided with uniformly arranged first arc convex points and second arc convex points, and the first arc convex points are larger than the second arc convex points, the first arc convex points and the second arc convex points arranged oppositely and aligned form a group of blocking points, and the two adjacent groups of the 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 of the embodiments, 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 with the mounting holes on the other side; the head and tail of the connecting screws respectively protrude in 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 sealingly abutted 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 sealingly abutted against the rotating shaft.

[0020] In one of the embodiments, two middle sealing rings are installed on the joint surface of the front end cover and the rear end 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 end cover that contacts the side of the PCB board coil.

[0021] In one of the embodiments, 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 and abutted 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 of the embodiments, 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 the accumulation of internal fluid and causing the PCB board coil to short-circuit; the outflow hole and the inflow hole are both arranged 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 of the embodiments, two circles of mounting grooves are provided on the circumferential surface of the rotating shaft, and the two mounting grooves are respectively adjacent to the rotating assembly of the front end cover and the rotating assembly of the rear end 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 installed 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 installed 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 penetrates into the axial hole of the second rotating member; the first rotating member and the second rotating member are respectively composed of a retaining plate, a bearing and at least two pressure sensors; the retaining plate is provided with an axial hole, and a retaining groove is provided on one side of the retaining plate, and the bearing is installed in the retaining groove; the outer ring of the retaining plate is provided with detection holes penetrating through the two side surfaces, and a plurality of detection holes are evenly arranged on the circumference of the retaining plate; the pressure sensor is installed in the detection hole, and the probe end of the pressure sensor extends out of the detection hole and contacts with the axial retaining ring, so as to detect the axial displacement of the rotating shaft when it rotates; when the first rotating member and the second rotating member are installed, the two bearings face the inner end surface of the stepped hole of the front end cover and the inner end surface of the stepped hole of the rear end cover respectively.

[0025] In one of the embodiments, 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 at positions of the front end cover and the rear end cover corresponding to the arc holes, and 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.

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

[0027] The present invention optimizes the structure and cost of traditional motors from multiple aspects by introducing a PCB coil structure, and provides a new technology for motor design. Specifically, the traditional winding coil is transformed into a PCB coil, and the coil is integrated on the PCB substrate. This design scheme:

[0028] Firstly, the application of PCB board coils greatly simplifies the internal structure of the motor; traditional motor coils are usually wound with copper wires, 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 positions; the technical solution of the present invention, by integrating the coils on the PCB substrate, 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 coils and based on mature semiconductor production equipment and processes, the production process of the PCB board coils has good repeatability and consistency, so that the automated production line can easily 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 accurately arranged on the PCB board, thereby replacing the heavy coil windings in traditional motors, and 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; 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 more miniaturized and lightweight as a whole. Compared with traditional motors, it also saves components such as stator cores, 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 new products.

[0030] In addition, the rotor assembly formed by the combination of the first induction magnet unit, the second induction magnet unit and the rotating shaft, and the PCB board coil, further solve the energy conversion efficiency problem in the traditional motor design. Based on the design of the W phase, U phase and V phase independently distributed on the plane on the PCB board coil, and directly connected to the coils of the three phases through the external wire of the connection hole, more precise phase control of the PCB board coil can be achieved; after the motor is powered on, the PCB board coil can generate a continuously changing and stable magnetic field, and efficiently interact with the magnetic fields of the first induction magnet unit and the second induction magnet unit in the rotor assembly, thereby achieving efficient rotation of the motor shaft. Due to the position of the PCB board coil arranged between the first induction magnet unit and the second induction magnet unit, and the phase structure of the coil, the current of the PCB board coil can be more accurately controlled, the electromagnetic energy loss is reduced, and the energy conversion efficiency of the motor is significantly improved, especially in the motor application environment with low power and high precision requirements.

[0031] The motor power structure consisting only of the first induction magnet unit, the second induction magnet unit and the PCB coil also greatly improves the convenience of motor installation and maintenance; the PCB board coil is directly integrated into the motor stator assembly consisting of the front cover and the rear cover, making the motor structure more compact and reducing the stator core components in the traditional motor. The front cover and the rear cover are combined with the rotating shaft through a detachable design, making the motor more convenient during disassembly and assembly, and helping to simplify the maintenance process. Especially in automation equipment that requires frequent maintenance or replacement of parts, this design effectively reduces the maintenance cost of traditional motor applications.

[0032] In summary, the present invention simplifies the structure of the motor, reduces the material, assembly and maintenance costs, and has significant effects in improving energy efficiency and convenience through the stator assembly composed of the PCB board coil, 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; it not only meets the needs of reducing costs and increasing efficiency of traditional motors, but also provides a new choice 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 suitable for multiple application fields such as consumer electronics, automobiles, and industrial automation, and can achieve efficient operation in multiple scenarios. Finally, 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 drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

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

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

[0037] Figure 4 It is a cross-sectional structural schematic diagram of the combination of the base plate and the sector magnet of the first embodiment of the present invention;

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

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

[0040] Figure 7 is a schematic assembly diagram of a stator assembly according to a 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] Fig. 9 is a cross-sectional view of a secondary dynamic sealing structure according to a second embodiment of the present invention;

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

[0044] The reference numerals are as follows:

[0045] 1. Stator assembly;

[0046] 2. front end 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. a first induction magnet unit; 72. a second induction magnet unit;

[0052] 81, base plate; 811, disc groove; 812, convex block; 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. Plate; 931. Shaft hole; 932. Slot; 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 in conjunction with 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 the existing motor is too complicated and the motor manufacturing cost cannot be further reduced.

[0057] In addition, all the contents of the configurations shown in the following embodiments are not necessarily limited to the solutions of 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 phases, 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 penetrated on the PCB substrate 41, and the coils protrude from the two sides of the PCB substrate 41. Insulating paint is sprayed or dipped on the surface of the PCB substrate 41 and the coil. The connecting holes 43 are penetrated by conductive sleeves on the PCB substrate 41. The three connecting holes 43 are electrically connected to the coils of the W phase, U phase and V phase respectively, and the end faces of both sides of the connecting holes 43 are not provided with insulating paint.

[0060] The present invention optimizes the structure and cost of the traditional motor from multiple aspects by introducing the PCB coil 4 structure, and provides a new technology for the design of the motor. Specifically, the traditional winding coil is transformed into a PCB coil 4, and the coil is integrated on the PCB substrate 41. This design scheme:

[0061] Firstly, the application of the PCB board coil 4 greatly simplifies the internal structure of the motor; traditional motor coils are usually wound with copper wires, requiring multi-layer windings and complex coil arrangements, which not only leads to numerous process steps, but also requires complex assembly techniques to ensure the uniformity of the windings and the accuracy of the positions; 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 arranged on the PCB board, thereby replacing the heavy coil windings in traditional motors, and 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; 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 more miniaturized and lightweight as a whole. Compared with traditional motors, it also saves components such as stator cores, 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 new products.

[0063] In addition, 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 board coil 4, further solve the energy conversion efficiency problem in the traditional motor design. Based on the design of the W phase, U phase and V phase independently distributed on the plane on the PCB board coil 4, and the external wires are directly connected to the coils of the three phases through the connection hole 43, the PCB board coil 4 can achieve more accurate phase control; after the motor is powered on, the PCB board coil 4 can generate a continuously changing and stable magnetic field, and efficiently interact with the magnetic fields of the first induction magnet unit 71 and the second induction magnet unit 72 in the rotor assembly 5, so as to achieve efficient rotation of the motor shaft 6. Due to the position of the PCB board coil 4 arranged between the first induction magnet unit 71 and the second induction magnet unit 72, and the phase structure of the coil, the current of the PCB board coil 4 can be more accurately controlled, the electromagnetic energy loss is reduced, and the energy conversion efficiency of the motor is significantly improved, especially in the motor application environment with low power and high precision requirements.

[0064] The motor power structure consisting only of the first induction magnet unit 71, the second induction magnet unit 72 and the PCB coil also greatly improves the convenience of motor installation and maintenance; the PCB board coil 4 is directly integrated into the motor stator assembly 1 consisting of the front cover 2 and the rear cover 3, making the motor structure more compact and reducing the stator core components in the traditional motor. The front cover 2 and the rear cover 3 are combined with the rotating shaft 6 through a detachable design, making the motor more convenient during assembly and disassembly, and helping to simplify the maintenance process. Especially in automation equipment that requires frequent maintenance or replacement of parts, this design effectively reduces the maintenance cost of traditional motor applications.

[0065] In summary, the present invention simplifies the structure of the motor, reduces the material, assembly and maintenance costs, and has significant effects in 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 choice 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 suitable for multiple application fields such as consumer electronics, automobiles, and industrial automation, and can achieve efficient operation in multiple scenarios. Finally, 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,

[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 circle of the annular groove 813 is sleeved outside the circle of mounting holes 814; the inner circumferential wall of the outer circle of the annular groove 813 and the outer circumferential wall of the inner circle are respectively A first arc protrusion 821 and a second arc protrusion 822 are evenly arranged, and the first arc protrusion 821 is larger than the second arc protrusion 822. The first arc protrusion 821 and the second arc protrusion 822 that are aligned opposite to each other form a group of blocking points 82, and two adjacent groups of blocking points 82 form a magnet accommodating cavity 83; a 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 that are alternately arranged.

[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 connecting through holes 611 aligned with each other are provided on the two connecting blocks 61; the two base plates 81 pass through the connecting through holes 611 through the mounting holes 814 on one side through the connecting screws, and reach and are threadedly connected with the mounting holes 814 on the other side; the head and tail of the connecting screws respectively protrude in the disc groove 811 of the base plate 81.

[0070] Regarding the installation 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, and the PCB board coil 4 is connected and fixed by screws passing through the first through hole 24 and the arc hole 44 in sequence to reach the first screw hole 33.

[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] When in use, 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 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. Fig. 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 arranged 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 the internal fluid accumulation and causing the PCB board coil 4 to short-circuit; 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 member 91 and the second rotating member 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 fan-shaped 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] A third embodiment of a motor with a PCB coil structure is as follows Fig.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 the motor has been used for a long time, its rotating shaft 6, the bearing 94 of the rotating component or the axial retaining ring 621 used to prevent the axial position of the rotating shaft 6 will wear during rotation, which will increase the axial displacement of the rotating shaft 6, thereby affecting the distance between the PCB board coil 4 and the base disks 81 on both sides. When the axial displacement is greater than the distance between the PCB board coil 4 and the base disks 81 on both sides, there is a problem that the insulating layer of the PCB board coil 4 is worn away by the base disk 81, and even the PCB board coil 4 is damaged by the base disk 81, thereby accelerating the progress of the 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 penetrating through the two side surfaces are provided on the outer ring of the bearing plate 93, 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 with the axial retaining ring 621, so as to detect the axial displacement of the rotating shaft 6 when the rotating shaft 6 rotates; when the first rotating member 91 and the second rotating member 92 are installed, the two bearings 94 face the inner end faces of the stepped hole of the front end cover 2 and the inner end faces of the stepped hole of the rear end cover 3 respectively.

[0081] During application, according to the pressure of the axial retaining ring 621 contacted by the pressure sensor 95, the axial displacement of the reaction diaphragm deformation is calculated by reverse calculation through 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 cover 2 and the rear cover 3 are provided with pressure sensors 95. By providing pressure feedback to the pressure sensors 95 on the front cover 2 or the rear cover 3 through the two axial retaining rings 621, the axial displacement direction of the rotating shaft 6 can be detected. 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, resulting in wear of the surface insulation layer of the PCB board coil 4, 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 the pressure sensor 95 from being damaged 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 make the description concise, 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 front end cover and the rear end cover are used as the stator assembly; the rotating shaft is used as the rotor assembly; The front end cover and the rear end cover are detachable and combined, the rotating shaft is rotatably mounted in the rotating assembly shaft holes of the front end cover and the rear end cover, and one end of the rotating shaft passes through the front end cover; and a disc-shaped first induction magnet unit and a second induction magnet unit; magnets are provided on the facing sides of the first magnet assembly and the second magnet assembly, and a gap is provided between the first induction magnet unit and the second induction magnet unit, and the first induction magnet unit and the second induction magnet unit are coaxially connected and fixed to the rotating shaft; and a PCB board coil; the PCB board coil is provided with a W phase, a U phase, and a V phase, and is 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 shaft 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 the two sides of the PCB board coil are provided with coils; When the W phase, U phase and V phase of the PCB board coil are energized, the PCB board coil generates a magnetic field, and interacts with the magnetic fields of the first induction magnet unit and the second induction magnet unit to drive the rotating shaft to rotate.

2. The motor with a PCB coil structure according to claim 1, characterized in that: The first induction magnet unit and the second induction magnet unit are both composed of a base plate and a plurality of sector-shaped 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 outside the circumference of the shaft hole of the base plate; a plurality of symmetrically distributed protrusions are provided on the circumference of the disc groove; The inner ring of the annular groove is sleeved outside 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 uniformly 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 oppositely and aligned form a group of blocking points, and two adjacent groups of the 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.

3. The motor with a PCB coil structure according to claim 2, characterized in that: 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 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 through 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 in the disc groove of the base plate.

4. The motor with a PCB coil structure according to claim 1, characterized in that: 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.

5. The motor with a PCB coil structure according to claim 4, characterized in that: Two middle sealing rings are installed on the joint surface of the front end cover and the rear end 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 end cover that contacts the side surface of the PCB board coil.

6. The motor with a PCB coil structure according to claim 5, characterized in that: 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 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 cover and the rear cover are combined, which is used to prevent external oil from entering the interior of the front cover and the rear cover, and to prevent the first induction magnet unit, the second induction magnet unit and the PCB board coil from being stuck with grease.

7. The motor with a PCB coil structure according to claim 6, characterized in that: It also includes a solenoid valve and a flow guide tube; 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 the fluid in the content space of the front cover and the rear cover, and controlling the internal pressure to avoid the accumulation of internal fluid and causing the PCB board coil to short-circuit; The outflow hole and the inflow hole are both arranged 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 to control the opening and closing of the outflow hole and the inflow hole to form a secondary dynamic seal.

8. The motor with a PCB coil structure according to claim 1, characterized in that: Two circles of mounting grooves are arranged on the circumference of the rotating shaft, and the two mounting grooves are respectively adjacent to the rotating assembly of the front end cover and the rotating assembly of the rear end cover; An axial retaining ring is installed in the installation groove.

9. The motor with a PCB coil structure according to claim 8, characterized in that: The rotating assembly includes a first rotating member and a second rotating member; The first rotating member is installed 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 installed in the stepped hole of the rear end cover and is coaxial with the shaft hole of the rear end cover; the other end of the rotating shaft penetrates into the shaft hole of the second rotating member; The first rotating member and the second rotating member are respectively composed of a retaining plate, a bearing and at least two pressure sensors; the retaining plate is provided with an axial hole, and a bearing groove is provided on one side of the retaining plate, and the bearing is installed in the bearing groove; the outer ring of the retaining plate is provided with detection holes penetrating the two side surfaces, and the plurality of detection holes are evenly arranged on the circumference of the retaining plate; The pressure sensor is installed in the detection hole, and the probe end of the pressure sensor extends out of the detection hole and contacts the axial retaining ring, so as to detect the axial displacement of the rotating shaft when the rotating shaft rotates; When the first rotating member and the second rotating member are installed, the two bearings face the inner end surface of the stepped hole of the front end cover and the inner end surface of the stepped hole of the rear end cover respectively.

10. The motor with a PCB coil structure according to claim 1, characterized in that: A plurality of arc holes are arranged on the outer circumference of the PCB board coil, and a first through hole and a first screw hole are respectively arranged at positions of the front end cover and the rear end cover corresponding to the arc holes, and 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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