Circuit board assembly suitable for motor and motor using same

Abstract

The utility model discloses a circuit board assembly suitable for a motor and a motor using the circuit board assembly, and the circuit board assembly comprises an insulating support plate which comprises a plate-shaped body which is fixed on an end cover of the motor and is made of an insulating material, and a through hole which is arranged on the plate-shaped body and is suitable for a rotating shaft of the motor to pass through, the positioning bosses are convexly arranged on the side end surface, opposite to the end cover, of the plate-shaped body and are distributed around the hole edge of the through hole; positioning holes suitable for being arranged on the positioning bosses in a sleeving manner are pre-formed in the PCB; the PCB is also provided with a connecting hole which is suitable for an electric terminal penetrating through the end cover in the motor to penetrate through; and the connecting holes are welded with the electric terminals. According to the utility model, on the basis of satisfying the effective cooperation among the PCB, the Hall sensor, the magnetic ring, the motor end cover and the rotating shaft, the installation process is simplified, and the stability of each part in the long-term use process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to a circuit board component suitable for a motor and a motor using the same. Background Art

[0002] A motor is an electromagnetic device that converts or transmits electrical energy according to the law of electromagnetic induction. Its main function is to generate driving torque as a power source for electrical appliances or various machines. In the prior art, existing motors are generally provided with a Hall sensor at the end to detect the position of the motor's shaft or the speed of the motor.

[0003] In this regard, the Hall sensor is usually fixed on the PCB circuit board, and then the induction magnetic ring that matches the Hall sensor is generally fixed on the motor shaft. The induction magnetic ring is radially magnetized. Through the radial matching of the magnetizing surface of the induction magnetic ring and the sensing surface of the Hall, when the motor shaft drives the induction magnetic ring to rotate, the Hall can recognize the magnetic field of the induction magnetic ring to the maximum extent and output a voltage signal.

[0004] In the above process, firstly, the stability of the PCB board in the internal structure of the motor directly affects the working state of the Hall sensor. Therefore, the patent with the announcement number CN 106411057 B discloses a Hall sensor fixing structure and a motor, in which the PCB board and the motor end cover are fixed by a first fixing part, and the first fixing part includes a fixing column protruding on the end cover, and the PCB board is provided with a fixing hole corresponding to the fixing column, and the PCB board is sleeved on the fixing column through the fixing hole. Although this structure realizes the fixation of the PCB board, it is found through actual use that although the PCB board itself is preset with insulating paint, as the use time increases, the insulating effect of the insulating paint will weaken or even cause insulation failure. Therefore, it is still difficult to effectively ensure the reliability of the PCB board under long-term use by directly fixing the PCB board and the end cover.

[0005] In addition, the Hall sensor generally used in the prior art is provided with three long pins in the same direction, and the three long pins are respectively welded to the positive pole of the VCC power supply, the negative pole of the GND power supply, and the output signal end on the PCB board, and the Hall sensing surface is in a vertical state with the PCB board, and the Hall sensing surface faces the direction of the shaft hole. In order to cooperate with the magnetizing surface of the induction magnetic ring, the Hall is installed in the direction away from the central axis of the PCB board. Specifically, the PCB board is installed with electronic components on one side, and at the position where the Hall is installed, three openings are provided for the Hall pins to be inserted, and the other side of the opening is in a closed state. After the bottom end of the Hall pin is inserted into the opening of the PCB board, solder is injected for spot welding. Therefore, there is a certain gap between the Hall sensing part and the PCB board to enable the spot welding pen to be inserted into the opening of the PCB board for spot welding. Therefore, it is necessary to select a Hall with long pins to realize this installation method. In addition, this welding method of the Hall increases the spatial height of the entire motor, and the Hall pin is too long, easy to break and not easy to weld.

[0006] Therefore, based on the problems existing in the production and use of PCB boards and Hall sensors on PCB boards in the prior art, it is necessary to further optimize the specific fixing structure of the PCB boards and the Hall sensors on the PCB boards. Utility Model Content

[0007] The first purpose of the utility model is to provide a circuit board assembly suitable for a motor to solve the technical problem of extending the service life of the motor.

[0008] The second purpose of the utility model is to provide a motor to solve the technical problem of optimizing its overall structure.

[0009] The circuit board assembly suitable for the motor of the utility model is realized as follows:

[0010] A circuit board assembly suitable for a motor, comprising:

[0011] An insulating support plate, comprising a plate-shaped body made of insulating material for fixing on the end cover of the motor, a through hole provided on the plate-shaped body for the motor shaft to pass through, and a positioning boss convexly provided on the side end surface of the plate-shaped body facing away from the end cover and distributed around the edge of the through hole;

[0012] A PCB board is provided with a positioning hole which is suitable for being mounted on the positioning boss; and the PCB board is also provided with a connecting hole which is suitable for an electric terminal passing through the end cover of the motor; and the connecting hole is connected to the electric terminal by welding.

[0013] In an optional implementation of the present invention, the plate-like body is fixed to the end cover by screws.

[0014] In an optional implementation of the present invention, the positioning boss is in the form of a circular ring, and at least one section of a flat surface is integrally formed on the outer side wall of the circular ring.

[0015] In an optional implementation of the present invention, a circumferential outer side wall of the insulating support plate is also preset with a yielding portion corresponding to the electrical terminal.

[0016] The motor of the utility model is realized as follows:

[0017] A motor comprises: a motor assembly, a circuit board assembly suitable for the motor used in conjunction with the motor assembly, at least one Hall sensor fixed on a PCB board, and a magnetic ring sleeved on a rotating shaft and suitable for being opposite to the Hall sensor.

[0018] In an optional implementation of the utility model, a Hall sensor is provided on the PCB board;

[0019] The Hall sensors are all patch type sensors; and the magnetic sensing surfaces of the Hall sensors face the magnetic ring.

[0020] In an optional implementation of the present invention, the end surface of the magnetic ring facing the Hall sensor adopts a planar magnetization structure.

[0021] In an optional implementation of the present invention, there is a gap between the magnetic sensing surface of the Hall sensor and the magnetizing surface of the magnetic ring, and the length of the gap along the axial direction of the rotating shaft is 0.2 to 1.2 mm.

[0022] In an optional implementation of the present invention, each of the Hall sensors has three pins for being welded to the PCB board; and each pin is provided with a welding portion.

[0023] In an optional implementation of the present invention, the welding portions of the three pins are suitable for being attached to the side end surface of the PCB board facing away from the insulating support plate and connected by welding.

[0024] By adopting the above technical scheme, the utility model has the following beneficial effects: the circuit board assembly suitable for the motor and the motor using the same of the utility model can achieve the insulation isolation effect between the end cover and the PCB board through the insulating support plate designed between the PCB board and the motor end cover, and can also achieve the rapid installation and positioning of the PCB board through the insulating support plate. On this basis, through the welding between the electrical terminal and the PCB board, on the basis of meeting the use requirements of the electrical terminal, the PCB board can also be fixed, thereby simplifying the fixing processing procedure of the PCB board.

[0025] Furthermore, for the Hall sensor used in this application, the three pins of the Hall sensor and the PCB board are all welded in a bonding manner, so that the pins themselves only need to use short pins to meet the use requirements, preventing the long pins from being easily broken and causing the problem of increasing the spatial height of the motor. In addition, for the Hall sensor itself and the magnetic ring to be distributed opposite each other, the accuracy of the Hall sensor's recognition of changes in magnetic field strength and direction can be improved by accurately controlling the distance between the magnetic sensing surface of the Hall sensor and the magnetizing surface of the magnetic ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a circuit board assembly applicable to a motor according to an embodiment of the present application being applied in the motor;

[0027] Figure 2 is a schematic structural diagram of a circuit board assembly applicable to a motor according to an embodiment of the present application;

[0028] Figure 3 is a schematic diagram of the exploded structure of a circuit board assembly applicable to a motor according to an embodiment of the present application;

[0029] Figure 4 It is an exploded schematic diagram of a PCB board and an insulating support board of a circuit board assembly applicable to a motor according to an embodiment of the present application;

[0030] Figure 5 It is a schematic diagram of the structure of the Hall sensor of the motor according to an embodiment of the present application.

[0031] In the figure: motor assembly 1, end cover 2, electrical terminal 3, PCB board 4, positioning hole 41, Hall sensor 5, magnetic sensing surface 51, pin one 52, pin two 53, pin three 54, welding part 55, magnetic ring 6, rotating shaft 7, connecting hole 8, insulating support plate 9, through hole 91, positioning boss 92, flat surface 921, yielding part 93, screw 100. DETAILED DESCRIPTION

[0032] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0033] Embodiment 1:

[0034] See also Figures 1 to 4 As shown, this embodiment provides a circuit board assembly suitable for a motor, comprising: an insulating support plate 9 for fixing on the end cover 2 of the motor, and a PCB board 4 fixed on the side of the insulating support plate 9 facing away from the end cover 2 .

[0035] Specifically, first, the insulating support plate 9 includes a plate-shaped body made of insulating material, a through hole 91 provided on the plate-shaped body for the motor shaft 7 to pass through, and a positioning boss 92 convexly provided on the side end surface of the plate-shaped body facing away from the end cover 2 and distributed around the edge of the through hole 91. The plate-shaped body here can be fixed to the end cover 2 by, for example, but not limited to, screws 100, and its shape can be selected to be roughly consistent with the shape of the end cover 2, such as a circle.

[0036] Next is the PCB board 4, which is preset with a positioning hole 41 suitable for being mounted on the positioning boss 92; the positioning hole 41 here only needs to be clearance-matched with the positioning boss 92, which is used to achieve preliminary positioning of the PCB board 4 during the assembly process. The entire PCB board 4 is mainly mounted on the insulating support plate 9, so that there is no direct contact between the PCB board 4 and the end cover 2.

[0037] On the basis of the above structure, further, a connection hole 8 suitable for the electric terminal 3 passing through the end cover 2 in the motor is further provided on the PCB board 4; the connection hole 8 is welded and connected to the electric terminal 3 to ensure the stability of the electrical connection. After the electric terminal 3 and the connection hole 8 are welded in place, combined with the bottom support of the PCB board 4 by the insulating support plate 9, the PCB board 4 cannot move. Generally, there are two electric terminals 3 passing through the end cover 2 on the motor, and these two are distributed on both sides of the rotating shaft 7 with the rotating shaft 7 as the symmetry axis. Therefore, the welding between the two electric terminals 3 and the connection hole 8 of the PCB board 4 can play a fixing effect on the PCB board 4. In other words, the application in this case reasonably utilizes the welding cooperation between the electric terminal 3 and the connection hole 8 to achieve the fixation of the PCB board 4, achieving the effect of killing two birds with one stone.

[0038] On the basis of the above structure, taking the insulating support plate 9 of a circular structure as an example, in order to prevent interference with the matching between the electric terminal 3 and the PCB board 4, a clearance portion 93 corresponding to the electric terminal 3 is preset on the circumferential outer wall of the insulating support plate 9. Specifically, two clearance portions 93 are required to adapt two electric terminals 3, and the clearance portions 93 here can be directly cut on the circumferential outer wall of the insulating support plate 9 to form a straight wall.

[0039] Based on the above situation, it is also necessary to explain that, in order to improve the alignment effect of the positioning boss 92 and the positioning hole 41 during the positioning process, so that the electrical terminal 3 can quickly and accurately enter the connection hole 8 on the PCB board 4, the positioning boss 92 and the positioning hole 41 adopt an irregular circular structure, such as a rectangle or a triangle. Here, as an example of an optional embodiment in conjunction with the accompanying drawings, the positioning boss 92 adopts a circular ring body, and at least one section of a flat surface 921 is integrally formed on the outer wall of the circular ring body.

[0040] In summary, for the circuit board assembly suitable for the motor of this embodiment, the insulating support plate 9 designed between the PCB board 4 and the motor end cover 2 can achieve the insulation isolation effect between the end cover 2 and the PCB board 4, and prevent the problem of insulation failure of the PCB board 4 after long-term use; the insulating support plate 9 can also be used to achieve rapid installation and positioning of the PCB board 4. On this basis, through the welding between the electrical terminal 3 and the PCB board 4, on the basis of meeting the use requirements of the electrical terminal 3, the PCB board 4 can also be fixed, effectively ensuring that the PCB board 4 will not rotate during use, and at the same time simplifying the fixing processing procedure of the PCB board 4.

[0041] Embodiment 2:

[0042] See also Figures 1 to 5 As shown, based on the circuit board assembly applicable to the motor of embodiment 1, this embodiment provides a motor, including: a motor assembly 1, a circuit board assembly applicable to the motor of embodiment 1 used in conjunction with the motor assembly 1, at least one Hall sensor 5 fixed on a PCB board 4, and a magnetic ring 6 sleeved on a rotating shaft 7 and suitable for being opposite to the Hall sensor 5. Specifically, the magnetic ring 6 here is fixed on the end of the rotating shaft 7 extending out of the side of the PCB board 4 facing away from the end cover 2. For the motor assembly 1 here, any mature means in the prior art can be selected, and this embodiment does not make any improvements to this, so its specific structure is not repeated here.

[0043] It should be noted that, in this embodiment, only one Hall sensor 5 can be designed, or two Hall sensors 5 can be designed. When two Hall sensors 5 are used, the two Hall sensors 5 are used to sense and generate a potential difference signal with the magnetic ring 6 when the magnetic ring 6 rotates, so as to detect the rotation angle of the motor. Compared with one Hall sensor 5, two Hall sensors 5 can double the resolution of the Hall encoder. Whether a specific motor uses one Hall sensor 5 or two Hall sensors 5 can be selected according to the actual needs of the application scenario, and this embodiment does not make an absolute limitation on this. The following description only takes the case of using one Hall sensor 5 as an example in conjunction with the accompanying drawings.

[0044] The magnetic ring 6 used in this embodiment can be fixed to the rotating shaft 7 by interference fit so that it can rotate synchronously with the rotating shaft 7. The thickness of the magnetic ring 6 can be 2-3 mm, which can meet the use requirements of this embodiment.

[0045] Next, an optional implementation example is given in conjunction with the accompanying drawings, where the Hall sensor 5 is a patch sensor; and the magnetic sensing surface 51 of the Hall sensor 5 faces the magnetic ring 6. The use of a patch sensor can shorten the axial distance between the magnetic ring 6 and the PCB board 4, reduce the space occupied by the motor in the axial direction, thereby improving the overall utilization rate, helping to achieve a more compact motor design, and adapting to more application scenarios.

[0046] It should be noted that the end surface of the magnetic ring 6 facing the Hall sensor 5 adopts a planar magnetization structure. The induction magnetic ring 6 is made of magnetic material and can be magnetized by 3 pairs of 6 poles, 4 pairs of 8 poles, or 12 pairs of 24 poles.

[0047] Based on the above situation, when the magnetic field of the induction magnetic ring 6 facing the PCB board 4 acts on the magnetic sensing surface 51 of the Hall sensor 5 on the PCB board 4, the Hall sensor 5 will generate corresponding electrical signals according to the changes in the magnetic field strength and direction, and output voltage signals.

[0048] On the basis of the above structure, it is also necessary to further explain that, in the present embodiment, there is a gap between the magnetic sensing surface 51 of the Hall sensor 5 and the magnetizing surface of the magnetic ring 6, and the length of the gap along the axial direction of the rotating shaft 7 is 0.2 to 1.2 mm. The design of the size of this gap can not only enable the Hall sensor 5 to more accurately identify the changes in the magnetic field strength and direction of the magnetic ring 6, but also improve the compactness of the overall motor. Furthermore, with respect to the magnetic ring 6, it is also necessary to explain that, in an optional implementation, the axial surface of the magnetic ring 6 facing the Hall sensor 5 can completely cover the magnetic sensing surface 51 of the Hall sensor 5 in the radial dimension, or the axial surface of the magnetic ring 6 facing the Hall sensor 5 can cover at least half of the magnetic sensing surface 51 of the Hall sensor 5 in the radial dimension, but will not completely cover the magnetic sensing surface 51 of the Hall sensor 5. The above situations all meet the use requirements of the present embodiment, and the present embodiment does not make an absolute limitation on this.

[0049] In addition, regarding the assembly and fixing method between the Hall sensor 5 and the PCB board 4 of this embodiment, this embodiment has the following design:

[0050] First, the Hall sensor 5 has three pins for welding to the PCB board 4; each pin is provided with a welding portion 55. The three pins used in this embodiment can all be short pins.

[0051] Secondly, the soldering parts 55 of the three pins are all suitable for being welded to the side end surface of the PCB board 4 facing away from the insulating support plate 9. Here, the soldering parts 55 of the pins are welded to the PCB board 4 in a fitting manner, which not only reduces the difficulty of the welding operation, but also improves the reliability of the formed welding structure and the stability of long-term use, reduces the probability of false solder joints and leaked solder joints, and reduces the deformation or damage that may occur during the welding process, which helps to improve production efficiency and product quality.

[0052] In conjunction with the optional implementation example shown in the accompanying drawings, pin 1 52 and pin 2 53 are installed on the same side of the body of the Hall sensor 5, while pin 3 54 is installed on the other side of the body of the Hall sensor 5, and pin 3 54 is located on the opposite side of pin 1 52 and pin 2 53. Under this structure, both the reliable welding between the Hall sensor 5 and the PCB board 4 can be satisfied, and the three pins can be arranged reasonably, which is convenient for the pins to be connected with other electronic components on the PCB board 4. For example, pin 1 52 is connected to +H (positive pole of power supply); pin 2 53 is connected to -H (negative pole of power supply); pin 3 54 is connected to OUT (Hall output); through the connection of the pins with other electronic components of the PCB board 4, when the motor and the Hall sensor 5 are powered on, the Hall sensor 5 outputs a voltage signal and a frequency signal.

[0053] In summary, for the motor of this embodiment, the three pins of the Hall sensor 5 are welded to the PCB board 4, so that the pins themselves only need to be short pins to meet the usage requirements, preventing the long pins from breaking easily and causing the problem of increased spatial height of the motor.

[0054] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0055] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0058] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0059] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A circuit board assembly suitable for a motor, characterized in that: include: An insulating support plate, comprising a plate-shaped body made of insulating material for fixing on the end cover of the motor, a through hole provided on the plate-shaped body for the motor shaft to pass through, and a positioning boss convexly provided on the side end surface of the plate-shaped body facing away from the end cover and distributed around the edge of the through hole; A PCB board is provided with a positioning hole which is suitable for being mounted on the positioning boss; and the PCB board is also provided with a connecting hole which is suitable for an electric terminal passing through the end cover of the motor; and the connecting hole is connected to the electric terminal by welding.

2. The circuit board assembly suitable for a motor according to claim 1, characterized in that: The plate-shaped body is fixed on the end cover by screws.

3. The circuit board assembly suitable for a motor according to claim 1 or 2, characterized in that: The positioning boss is a circular ring, and at least one flat surface is integrally formed on the outer wall of the circular ring.

4. The circuit board assembly suitable for a motor according to claim 1 or 2, characterized in that: The circumferential outer side wall of the insulating support plate is also preset with a yielding portion corresponding to the electrical terminal.

5. A motor, characterized in that: include: A motor assembly, a circuit board assembly suitable for the motor as described in any one of claims 1 to 4 used in conjunction with the motor assembly, at least one Hall sensor fixed on the PCB board, and a magnetic ring sleeved on the rotating shaft and suitable for being opposite to the Hall sensor.

6. The motor according to claim 5, characterized in that A Hall sensor is provided on the PCB board; The Hall sensors are all patch type sensors; and the magnetic sensing surfaces of the Hall sensors face the magnetic ring.

7. The motor according to claim 6, characterized in that The end surface of the magnetic ring facing the Hall sensor adopts a planar magnetization structure.

8. The motor according to claim 7, characterized in that There is a gap between the magnetic sensing surface of the Hall sensor and the magnetizing surface of the magnetic ring, and the length of the gap along the axial direction of the rotating shaft is 0.2-1.2 mm.

9. The motor according to claim 5, characterized in that Each of the Hall sensors has three pins for being connected to the PCB board by welding; each pin is provided with a welding portion.

10. The motor according to claim 9, characterized in that The welding parts of the three pins are suitable for being attached to the side end surface of the PCB board facing away from the insulating support plate and connected by welding.

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