Motor

Abstract

The invention belongs to the technical field of motors, and particularly discloses a motor which comprises a rear cover shell, a machine shell, a rotor assembly and a stator assembly, the stator assembly and the rotor assembly are both installed in the machine shell, the rear cover shell is connected with the machine shell, the motor further comprises a PCBA board and a connector, the PCBA board is fixed in the rear cover shell, and the connector is connected with the PCBA board. The connector is fixed on the outer side of the rear cover shell, a connector terminal is installed on the connector, and one end of the connector terminal is pressed on the PCBA board. The integration level of the motor can be improved, and the structure is simplified.

Description

Technical Field

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

[0002] Currently, the motor's rear cover and housing require a seal during assembly. Existing techniques typically use a sealing ring or sealant combined with a fastening structure to achieve this seal. This approach has poor reliability, a more complex overall structure, and higher costs. Furthermore, since the seal between the motor's rear cover and housing often relies on a sealing ring or sealant, this solution is susceptible to material aging and high-temperature deformation. This poses a risk of leakage over long periods of use, requires frequent maintenance, and struggles to meet lightweight requirements.

[0003] In the prior art, the mounting flange of the motor is generally formed integrally with the housing of the motor, resulting in fixed dimensions of the mounting flange and the inability to flexibly adjust the flange according to the different needs of different customers.

[0004] In addition, the integration between the motor back cover and the housing in the prior art is poor, resulting in a larger volume after the motor back cover and the housing are assembled, which is not conducive to reducing customer costs and space layout requirements. Summary of the Invention

[0005] The present invention provides a motor, aiming to improve the integration of the motor and simplify the structure.

[0006] The present invention is achieved through the following technical solution: a motor includes a rear cover shell, a casing, a rotor assembly and a stator assembly, wherein the stator assembly and the rotor assembly are both installed in the casing, the rear cover shell is connected to the casing, and further includes a PCBA board and a connector, wherein the PCBA board is fixed in the rear cover shell, the connector is fixed on the outside of the rear cover shell, a connector terminal is installed on the connector, and one end of the connector terminal is press-fitted on the PCBA board.

[0007] Compared with the prior art, the present invention has the following advantages and beneficial effects: the PCBA board and connector in the present invention are integrated on the rear cover shell of the motor, which can effectively improve the integration of the motor, simplify the structure, and enable the motor to have communication interaction and control functions. It can be connected to an external control drive system (such as a controller) through the connector, thereby facilitating the control of the operation of the motor. After the PCBA board in the present invention is integrated inside the rear cover shell, it effectively improves the integration level, reduces the space occupied, and enables a more compact fit between the motor and the PCBA board, which is more conducive to reducing customers' costs and meeting space layout requirements.

[0008] Furthermore, an injection molded body and a mounting plate are fixedly connected inside the rear cover shell, a heat rivet column is provided on the injection molded body, the PCBA board is located between the injection molded body and the mounting plate, one end of the heat rivet column passes through the PCBA board and is fixed to the PCBA board by heat rivets, and the mounting plate is pressed into the rear cover shell.

[0009] The injection molding and mounting plate in this solution enable PCBA installation. Thermal rivets secure the PCBA in place, and the mounting plate and studs provide stable support and heat dissipation for the PCBA's installation position, ensuring stability. Vibration generated during motor operation prevents the PCBA from shifting, while ensuring proper heat dissipation during operation. In this solution, the mounting plate is also integrated into the motor's rear housing, effectively increasing the motor's integration and simplifying its structure.

[0010] Furthermore, a clearance hole is opened on the placement plate, and the clearance hole is arranged opposite to the thermal rivet column. One end of the thermal rivet column passes through the PCBA board and is located in the clearance hole. The aperture of the clearance hole is larger than the outer diameter of the thermal rivet column.

[0011] In this solution, the clearance holes opened on the mounting plate provide space to avoid hard contact between the PCBA board and the mounting plate, and can also prevent the mounting plate from interfering with the thermal rivet column and affecting the assembly accuracy when the mounting plate is pressed later.

[0012] Furthermore, a plurality of electronic components are connected to the PCBA board, and heat sinks are provided on the surfaces of the electronic components.

[0013] In this solution, a heat sink is set on the surface of the electronic components on the PCBA board. The setting of the heat sink can dissipate heat from the electronic components on the PCBA board that have heat dissipation requirements to the back cover, ensuring the stable performance of the electronic components on the PCBA board.

[0014] Furthermore, the stator assembly includes stator silicon steel laminations, coil windings, three-phase terminals, a bobbin and a bobbin. The coil windings are wound and fixed on the bobbin. The bobbin is press-fitted on the end of the bobbin. One end of the three-phase terminal is press-fitted onto the bobbin, and the other end of the three-phase terminal is press-fitted onto the PCBA board. The bobbin is fixed on the stator silicon steel laminations.

[0015] The three-phase terminals in this solution adopt a solderless terminal connection structure. The three-phase terminals are press-fitted with the wire rack and PCBA board, making the manufacturing process simpler and significantly reducing the amount of raw materials used, which is conducive to cost reduction.

[0016] Furthermore, the rotor assembly includes a rotor core and a rotor shaft, the upper and lower parts of the rotor shaft are fixedly connected with a rear end bearing and a front end bearing respectively, the upper part of the rotor shaft is rotatably engaged with the mounting plate through the rear end bearing, and the lower part of the rotor shaft is rotatably connected to the casing through the front end bearing.

[0017] In this solution, the rotor shaft is rotatably connected to the mounting plate and the casing via the rear end bearing and the front end bearing, respectively, thereby ensuring the free rotation of the rotor assembly.

[0018] Furthermore, a signal magnetic ring is provided at one end of the rotor shaft facing the PCBA board, a Hall sensor is arranged at the center of one end of the PCBA board, a through hole is opened at the center of the placement plate, the signal magnetic ring is located in the through hole and directly opposite to the Hall sensor.

[0019] In this solution, the signal magnetic ring is usually composed of a ring-shaped permanent magnet. The Hall sensor detects the continuous change of the magnetic field strength when the magnetic ring rotates, outputs a voltage signal proportional to the magnetic field strength, and realizes the sensory control function of the motor.

[0020] Furthermore, a rear end bearing chamber is provided in the center of the mounting plate, a front end bearing chamber and an oil seal chamber are provided at one end of the casing, and a rear cover matching chamber is provided at the other end of the casing. The rear end bearing and the front end bearing of the rotor shaft are respectively connected to the rear end bearing chamber and the front end bearing chamber. A skeleton oil seal is provided in the oil seal chamber for sealing, and the rear cover matching chamber is connected and matched with the rear cover shell.

[0021] In this solution, the front end bearing chamber and the rear end bearing chamber can provide installation chambers for the front end bearing and the rear end bearing respectively, and the bearing chamber is convenient for installing the skeleton oil seal to form a sealing function, which can prevent the drive system oil from entering the motor and affecting the motor function.

[0022] Furthermore, the rear cover shell is fixed to the casing by welding.

[0023] In this solution, the back cover shell and the casing can be structurally connected and sealed by welding, without the need to add parts such as sealing rings / sealants to meet the sealing requirements. The overall structure is simpler and meets the functional requirements at the same time.

[0024] Furthermore, it also includes a mounting flange, the material of the mounting flange is the same as the material of the casing, and the mounting flange and the casing are set separately.

[0025] In this solution, the mounting flange and the casing are separate. By designing with the same material, in practice, different customers can choose mounting flanges with different mounting flange holes, sizes, and positions according to their different needs. The selected mounting flanges are then connected to the casing through welding or other methods to form a whole, thereby achieving the installation and fixation of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings: Figure 1 This is a schematic diagram of the three-dimensional structure of a motor embodiment of the present invention; Figure 2 A longitudinal cross-sectional view of an embodiment of a motor of the present invention; Figure 3 A longitudinal cross-sectional view of a rear cover housing in an embodiment of a motor of the present invention; Figure 4 A perspective view of a stator assembly in an embodiment of a motor according to the present invention; Figure 5 A perspective view of a rotor assembly in an embodiment of a motor according to the present invention; Figure 6 This is a longitudinal cross-sectional view of a casing in an embodiment of a motor of the present invention.

[0027] Markings and corresponding parts names in the accompanying drawings: Rear cover shell 1, housing 2, front end bearing chamber 201, oil seal chamber 202, rear cover mating chamber 203, connector 3, connector terminal 301, mounting flange 4, stator assembly 5, stator silicon steel lamination 500, three-phase terminal 501, coil winding 502, wire rack 503, wire rack 504, rotor assembly 6, rear end bearing 601, front end bearing 602, signal magnetic ring 603, rotor core 604, rotor shaft 605, PCBA board 7, Hall sensor 701, electronic components 702, injection molded body 8, hot rivet column 801, placement plate 9, and clearance hole 901. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0029] like Figure 1-Figure 2 As shown, as an embodiment of the present application, a motor is provided, including a rear cover shell 1, a casing 2, a rotor assembly 6 and a stator assembly 5. The stator assembly 5 and the rotor assembly 6 are both installed in the casing 2, and the rear cover shell 1 is connected to the casing 2. In this embodiment, the rear cover shell 1 and the casing 2 of the motor are designed with the same material, and the rear cover shell 1 and the casing 2 are welded and fixed. The rear cover shell 1 and the casing 2 form a structural connection and seal by welding, and there is no need to add parts such as sealing rings / sealants to meet the sealing requirements. The overall structure is simpler and meets the functional requirements at the same time.

[0030] Combine Figure 3 As shown, a motor in this embodiment also includes a PCBA board 7 and a connector 3, a plurality of electronic components 702 are connected to the PCBA board 7, the PCBA board 7 is fixed in the rear cover shell 1, and the connector 3 is fixed on the outside of the rear cover shell 1, and a connector terminal 301 is installed on the connector 3, and the connector terminal 301 is a fisheye terminal. One end of the connector terminal 301 is pressed on the PCBA board 7 by interference fit and is connected to the PCBA board 7, and the other end of the connector terminal 301 is located at the external interface of the connector 3, which can be connected to the power supply, controller and other equipment in the prior art.

[0031] In this embodiment, the motor integrates a PCBA board 7 and a connector 3 on the rear cover housing 1, so that it has communication interaction and control functions.

[0032] In one embodiment, an injection molded body 8 and a mounting plate 9 are fixedly connected inside the back cover shell 1. The mounting plate 9 is a metal mounting plate made of metal material. The mounting plate 9 is pressed into the inside of the back cover shell 1 by interference fitting to strengthen the support and heat dissipation of the PCBA board 7. A heat rivet column 801 is provided on the injection molded body 8. The heat rivet column 801 is integrally formed with the injection molded body 8. When the injection molded body 8 is injection molded, the back cover shell 1 is pre-placed in the mold cavity for injecting the injection molded body 8, and the connector 3 and the injection molded body 8 are injection molded as one piece, so that the connector terminal 301 on the connector 3 is inserted into the injection molded body 8, and one end of the connector terminal 301 passes through the bottom of the injection molded body 8, so that the connector 3 and the injection molded body 8 form a whole and are fixed on the back cover shell 1.

[0033] The injection molding body 8 in this embodiment includes a flat plate and a column. The flat plate is attached to the top of the rear cover housing 1, and the column is used to provide support for the multiple connector terminals 301 on the connector 3. The multiple connector terminals 301 on the connector 3 all pass through the column. The injection molding body 8 is insulating, thereby ensuring the stable performance of the connector 3. There are multiple heat rivet studs 801 on the injection molding body 8, and the multiple heat rivet studs 801 are fixed to the flat plate. The PCBA board 7 is located between the injection molding body 8 and the mounting plate 9. The PCBA board 7 is also pressed into the rear cover housing 1 by press-fitting, and abuts against the limiting end face of the injection molding body 8 (i.e., abuts against the bottom end of the column of the injection molding body 8). One end of the heat rivet stud 801 penetrates the PCBA board and is heat-riveted to the PCBA board. Specifically, after the heat rivet stud 801 penetrates the PCBA board 7, the bottom end of the heat rivet stud 801 is softened by heating and then pressurized to deform, forming a mushroom-shaped structure that locks the PCBA board 7.

[0034] In one embodiment, Figure 2 and Figure 3As shown, a clearance hole 901 is provided on the placement plate 9. The number of the clearance holes 901 is the same as the number of the thermal rivet studs 801, and the clearance holes 901 are arranged opposite to the thermal rivet studs 801. One end of the thermal rivet stud 801 passes through the PCBA board 7 and is located in the clearance hole 901. The aperture of the clearance hole 901 is larger than the outer diameter of the thermal rivet stud 801. When the thermal rivet stud 901 is heated and pressurized to form a mushroom head shape to lock the PCBA board 7, the placement plate 9 is press-fitted. Due to the clearance hole 901 provided on the placement plate 9, when the placement plate 9 is press-fitted, the end of the thermal rivet stud 901 can be located in the clearance hole 901, avoiding interference with the press-fitting of the placement plate 9. The provision of the clearance hole 901 in this embodiment can avoid interference with the thermal rivet stud 901 during the press-fitting of the placement plate 9, thereby effectively ensuring assembly accuracy.

[0035] In one embodiment, a heat sink is provided on the surface of the electronic component 702 on the PCBA board 7. The heat sink can be a heat sink glue or a heat sink pad in the prior art. After the heat sink glue or the heat sink pad is arranged on the electronic component 702 on the PCBA board 7, the PCBA board 7 is pressed into the rear cover shell 1 and abutted against the bottom end of the column of the injection molded body 8. At the same time, the fisheye connector terminal 301 is also pressed onto the PCBA board 7 and is connected to the PCBA board 7.

[0036] After arranging heat dissipation glue or heat dissipation pads on the electronic components 702 on the back of the PCBA board 7, the metal placement plate 9 is press-fitted into place with the rear cover shell 1 by interference fit, thereby further enhancing the heat dissipation requirements of the electronic components 702 on the PCBA board 7. The above structure realizes information interaction between the motor and the drive system in the prior art, that is, the motor of the present invention is integrated with the PCBA board 7, and the control function of the motor is realized through the PCBA board 7. The PCBA board 7 is connected to the connector 3, and the connection with the external drive system is realized through the connector 3, thereby facilitating the control of the motor movement and ensuring the heat dissipation requirements of the PCBA board 7.

[0037] In one embodiment, Figure 4 As shown, the stator assembly 5 includes a stator silicon steel laminate 500, a coil winding 502, a three-phase terminal 501, a bobbin 503, and a bobbin 504. The coil winding 502 is wound and fixed on the bobbin 504. The bobbin 503 is press-fitted to the end of the bobbin 504. One end of the three-phase terminal 501 is interference-fitted onto the bobbin 503, and the other end of the three-phase terminal 501 is interference-fitted onto the PCBA board 7. The bobbin 504 is fixed to the stator silicon steel laminate 500. In this embodiment, the three-phase terminal 501 is a fisheye terminal. The motor is connected to the PCBA board through the three-phase terminal 501 of the stator assembly 5 (a solderless structure, i.e., an interference-fit structure) to realize the control function of the motor. At the same time, the solderless three-phase terminal 501 has a relatively simple structure and uses less material.

[0038] In one embodiment, Figure 2 and Figure 5 As shown, the rotor assembly 6 includes a rotor core 604 and a rotor shaft 605. The upper and lower parts of the rotor shaft 605 are fixedly connected with a rear end bearing 601 and a front end bearing 602 respectively. The upper part of the rotor shaft 605 is rotatably engaged with the mounting plate 9 through the rear end bearing 601, and the lower part of the rotor shaft 605 is rotatably connected to the casing 2 through the front end bearing 602.

[0039] Combine Figure 5 As shown, a signal magnetic ring 603 is provided at one end of the rotor shaft 605 facing the PCBA board 7. The signal magnetic ring 603 is fixed to the end face of the rotor shaft 605. Figure 3 As shown, a Hall sensor 701 is arranged at the center of one end of the PCBA board 7, a through hole is opened at the center of the placement board 9, and the signal magnetic ring 603 is located in the through hole and directly faces the Hall sensor 701.

[0040] The center of the placement plate 9 is provided with a chamber for the rear end bearing 601, combined with Figure 6 As shown, one end of the housing 2 is provided with a front bearing chamber 201 and an oil seal chamber 202, and the other end of the housing 2 is provided with a rear cover matching chamber 203. The rear end bearing 601 and the front end bearing 602 of the rotor shaft 605 are connected to the rear end bearing chamber 601 and the front end bearing chamber 201 respectively. Figure 2 As shown, a skeleton oil seal is provided in the oil seal chamber 202 for sealing, and the rear cover matching chamber 203 is connected and matched with the rear cover shell 1. Specifically: in this embodiment, the size of the rear cover matching chamber 203 matches the outer diameter of the rear cover shell 1, and the rear cover matching chamber 203 forms a stepped hole structure with the casing 2. After the rear cover shell 1 is embedded in the rear cover matching chamber 203 of the casing 2, the casing 2 and the rear cover shell 1 are welded and fixed.

[0041] In the present invention, the motor realizes the sensory control function of the motor by designing a signal magnetic ring 603 on the end face of the rotor shaft 605 and arranging a Hall sensor 701 in the center of the PCBA board 7. The PCBA board 7 feeds back the angle signal to the drive system through the connector terminal 301, and then feeds back the signal to the PCBA board 7 of the motor in combination with the drive system's requirements. After receiving the information, the motor performs corresponding actions, such as opening and closing or reversing. To support the free rotation of the rotor assembly 6, the rotor shaft 605 in the rotor assembly 6 is supported by two bearings. The rear end bearing 601 cooperates with the bearing chamber of the mounting plate 9, and the front end bearing 602 cooperates with the bearing chamber of the casing 2.

[0042] The entire motor is connected through the casing 2 and the rear cover shell 1 to integrate the various components to form a complete functional motor. The specific process is as follows: the stator assembly 5 is press-fitted with the casing 2, the rotor assembly 6 passes through the stator assembly 5, and the front end bearing 602 on the rotor assembly 6 is pressed into the front end bearing chamber 201 of the casing 2, and then the rotor assembly 6 is pressed into the rear cover shell 1 as a whole, and the rear end bearing 601 in the rotor assembly 6 is pressed into the rear end bearing 601 chamber of the rear cover shell 1, and the rear cover shell 1 is installed into the rear cover matching chamber 203 of the casing 2, and finally the skeleton oil seal is pressed into the oil seal chamber 202 to form a sealing function, which can prevent the drive system oil from entering the motor and affecting the motor function.

[0043] In one embodiment, Figure 1 As shown, a motor further includes a mounting flange 4. The mounting flange 4 is made of the same material as the housing 2 and is provided separately from the housing 2. In practice, the mounting flange 4 can be provided in a variety of different models according to different customer needs. The customer can then flexibly select the corresponding model of mounting flange 4 based on their actual needs. The selected mounting flange 4 is then connected to the housing 2 by welding or other means to form an integral whole, thereby enabling subsequent installation and fixation of the motor.

[0044] In this embodiment, the initial mounting flange 4 and the casing 2 are separately provided. In this way, after the casing 2 and the rear cover shell 1 are connected and matched to form a completed motor product, its internal structure and the connection position relationship between the casing 2 and the rear cover shell 1 remain unchanged. At this time, it is only necessary to select the corresponding model of mounting flange 4 according to customer needs, and fix the mounting flange 4 to the assembled motor product. Because the mounting flange 4 and the casing 2 are formed separately, the flange hole, size and position of the mounting flange 4 can be flexibly adjusted to adapt to the needs of different customers.

[0045] Compared with the prior art, the present invention has the following advantages: 1. Compared with other motors, the motor rear cover shell 1 and the housing 2 of the present invention are directly welded together to form a sealing function, avoiding the use of sealing rings / sealants and other structures, which is simpler and more cost-effective.

[0046] 2. Compared with the motors used in the market, the motor rear cover shell 1 of the present invention integrates the installation, heat dissipation and connector 3 structure of the PCBA board 7, and has a precise control function; it meets the heat dissipation requirements and does not require an external control box. At the same time, the connector 3 can be flexibly adjusted. During development, the corresponding model of connector 3 can be selected for assembly according to the needs of different customers, which is convenient for adapting to different customer needs, helping to reduce customer costs and arrange space.

[0047] 3. The mounting flange 4 and the housing 2 of the motor of the present invention are initially a separate structure, and the flange structure can be flexibly adjusted to adapt to different customer needs, which is conducive to the platform construction of the product and has cost advantages; 4. The motor of the present invention adopts a solder-free terminal connection structure, which makes the manufacturing process simpler and greatly reduces the amount of raw materials used, thereby reducing costs.

[0048] It should be noted that the above description of the disclosed embodiments is intended to enable those skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A motor comprising a rear cover housing, a casing, a rotor assembly and a stator assembly, wherein the stator assembly and the rotor assembly are both mounted in the casing, and the rear cover housing is connected to the casing, characterized in that: It also includes a PCBA board and a connector, the PCBA board is fixed in the rear cover shell, the connector is fixed outside the rear cover shell, a connector terminal is installed on the connector, and one end of the connector terminal is press-fitted on the PCBA board.

2. A motor according to claim 1, characterized in that: An injection molded body and a mounting plate are fixedly connected inside the rear cover shell. A heat rivet column is provided on the injection molded body. The PCBA board is located between the injection molded body and the mounting plate. One end of the heat rivet column passes through the PCBA board and is fixed to the PCBA board by heat rivets. The mounting plate is press-fitted into the rear cover shell.

3. The motor according to claim 2, characterized in that: A clearance hole is provided on the placement plate, and the clearance hole is arranged opposite to the thermal rivet column. One end of the thermal rivet column passes through the PCBA board and is located in the clearance hole. The aperture of the clearance hole is larger than the outer diameter of the thermal rivet column.

4. The motor according to claim 1, characterized in that: The surfaces of the electronic components on the PCBA board are provided with heat sinks.

5. The motor according to claim 1, characterized in that: The stator assembly includes stator silicon steel laminations, coil windings, three-phase terminals, a bobbin and a bobbin. The coil windings are wound and fixed on the bobbin. The bobbin is press-fitted onto the end of the bobbin. One end of the three-phase terminal is press-fitted onto the bobbin, and the other end of the three-phase terminal is press-fitted onto the PCBA board. The bobbin is fixed onto the stator silicon steel laminations.

6. The motor according to claim 2, characterized in that: The rotor assembly includes a rotor core and a rotor shaft. The upper and lower parts of the rotor shaft are fixedly connected with a rear end bearing and a front end bearing respectively. The upper part of the rotor shaft is rotatably engaged with the mounting plate through the rear end bearing, and the lower part of the rotor shaft is rotatably connected to the casing through the front end bearing.

7. The motor according to claim 6, characterized in that: A signal magnetic ring is provided at one end of the rotor shaft facing the PCBA board, a Hall sensor is arranged at the center of one end of the PCBA board, a through hole is opened at the center of the placement plate, the signal magnetic ring is located in the through hole and directly faces the Hall sensor.

8. The motor according to claim 6, characterized in that: A rear end bearing chamber is provided at the center of the mounting plate, a front end bearing chamber and an oil seal chamber are provided at one end of the casing, and a rear cover matching chamber is provided at the other end of the casing. The rear end bearing and the front end bearing of the rotor shaft are connected to the rear end bearing chamber and the front end bearing chamber respectively, a skeleton oil seal is provided in the oil seal chamber for sealing, and the rear cover matching chamber is connected and matched with the rear cover shell.

9. The motor according to claim 1, characterized in that: The rear cover shell is welded and fixed to the casing.

10. The motor according to claim 1, characterized in that: It also includes a mounting flange, the material of the mounting flange is the same as that of the casing, and the mounting flange and the casing are separately arranged.

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