CN219535740U - Stator assembly and air door actuator using same - Google Patents

Abstract

The utility model discloses a stator assembly and a throttle actuator using the stator assembly, comprising: the coil framework is provided with a terminal block and a supporting and connecting assembly, wherein the terminal block is arranged on the same axial side end of the coil framework, and the supporting and connecting assembly is used for being matched with a PCB circuit board; the support connecting assembly comprises at least three support blocks which are arranged on the coil framework at intervals, and the at least three support blocks are suitable for jointly supporting the end face of the PCB towards the coil framework; the terminal block is arranged at the circumferential edge of the axial side end of the coil framework and extends in the radial direction of the coil framework; and the support connecting assembly further comprises at least two positioning columns which are arranged on the coil framework at intervals and are used for being matched with the PCB in a clamping manner. The utility model can simplify the integral structure of the air door actuator so as to facilitate assembly and reduce production cost.

Description

Stator assembly and air door actuator using same

Technical Field

The utility model relates to the technical field of air door actuators, in particular to a stator assembly and an air door actuator using the stator assembly.

Background

The air door actuator of the automobile air conditioner generally comprises an outer shell, a motor arranged in the outer shell, a reduction gear set connected with the motor and a PCB circuit board to realize torque output. The control of the motor operation state is generally realized by a PCB circuit board connected with the motor operation state, and the speed reduction gear set is used for realizing the speed reduction effect of the output power generated by the motor. The motor thus needs to meet both the mating with the PCB board and the reduction gear set.

For example, CN204354764U discloses an air door actuator of an automotive air conditioner, which comprises a housing, wherein an air door rod driving gear and a driving motor capable of driving the air door rod driving gear to rotate are arranged in the housing, and the air door rod driving gear is connected with the driving motor through a gear reduction mechanism. And a contact spring and a circuit board electrically connected with the contact spring are arranged on the throttle lever driving gear. The circuit board is fixed on the air door rod driving gear, and meanwhile, the circuit board is matched with the motor, so that the whole circuit board is large in size, and for the circuit board with large size, the cost of the circuit board is increased, and the problem of the whole size increase of the actuator cannot be caused, so that the requirement of the market on gradually realizing the miniaturization of the actuator cannot be met.

Based on the above situation, publication number CN209063853U discloses an automobile air conditioner damper actuator, which comprises a motor, a PCB circuit board and a plug spring; the PCB circuit board is directly arranged at one shaft end of the motor, and the volume of the PCB circuit board can be directly and effectively reduced on the basis of realizing connection between the PCB circuit board and the motor. However, although the connection between the PCB and the motor is realized in the disclosed technology, for the whole air door actuator, the connection between the PCB and the motor is required, the installation and fixation of the PCB in the air door actuator are also required to be considered, and in combination with the application scenario of the automobile air door actuator in the automobile, the stability of the fixation state of the PCB in the air door actuator directly influences the service life of the whole actuator along with possible jolt in the use process of the automobile. Therefore, for the PCB circuit board, not only the effective cooperation with the motor, but also the mounting and fixing of the PCB circuit board itself in the damper actuator are required to be considered.

In addition, publication No. CN209063853U discloses a motor in an air conditioner damper actuator for an automobile as a motor of a complete structure, that is, comprising a motor housing and a stator structure and a rotor structure built in the motor housing, wherein the motor housing further comprises a casing and an end cover located at the axial end side of the casing, and the PCB circuit board is also arranged at one side of the end cover. Therefore, the motor is required to be integrally assembled in the production process under the structure, and the complexity of assembly and production can be increased.

Disclosure of Invention

The first objective of the present utility model is to provide a stator assembly, which solves the technical problem of optimizing the structure of the stator assembly to improve the convenience of the stator assembly to be matched with a PCB circuit board.

A second object of the present utility model is to provide a damper actuator to solve the technical problems of simplifying the overall structure of the damper actuator to facilitate assembly and reduce production costs.

The stator assembly of the present utility model is implemented as follows:

a stator assembly, comprising: the coil framework is provided with a terminal block and a supporting and connecting assembly, wherein the terminal block is arranged on the same axial side end of the coil framework, and the supporting and connecting assembly is used for being matched with a PCB circuit board; wherein the method comprises the steps of

The support connecting assembly comprises at least three support blocks which are arranged on the coil framework at intervals, and the at least three support blocks are suitable for jointly supporting the end face of the PCB towards the coil framework;

the terminal block is arranged at the circumferential edge of the axial side end of the coil framework and extends in the radial direction of the coil framework; and

the support connecting assembly further comprises at least two positioning columns which are arranged on the coil framework at intervals and used for being matched with the PCB in a clamping mode.

In an alternative embodiment of the utility model, at least two of the positioning posts and at least three of the support blocks are integrally injection molded onto the coil former.

In an alternative embodiment of the utility model, the terminal block is further formed with mounting holes for receiving grounding springs.

In an alternative embodiment of the present utility model, the stator assembly further includes a casing sleeved outside the coil skeleton; and

and a yielding groove suitable for embedding part of the terminal block is formed on the side wall of the shell.

In an alternative embodiment of the present utility model, the depth of the relief groove along the axial direction of the casing is not more than one third of the axial length of the casing.

In an alternative embodiment of the utility model, a circular through hole coaxial with the shell is formed at the axial side end of the shell, which faces away from the terminal block; and

the hole edge of the circular through hole is provided with a plurality of claw poles which are bent towards the inner cavity of the shell at intervals along the circumferential direction; the corresponding shaft ends of the coil frameworks, which are opposite to the terminal blocks, are provided with a plurality of claw pole avoiding grooves which are suitable for one-to-one embedding of a plurality of claw poles.

The throttle actuator of the present utility model is implemented as follows:

a damper actuator comprising: the device comprises a shell, a motor, a driving gear directly driven by the motor, an intermediate gear set in transmission fit with the driving gear, and an output gear in transmission fit with the intermediate gear set, wherein the motor is arranged in the shell; wherein the method comprises the steps of

The motor comprises the stator assembly, a rotor assembly and a PCB circuit board, wherein the rotor assembly and the PCB circuit board are respectively matched and connected with the stator assembly; and

the air door actuator further comprises a coupler connected with the PCB.

In an alternative embodiment of the present utility model, the PCB circuit board includes: the electronic component comprises a substrate, electronic components respectively arranged on two side end surfaces of the substrate in the thickness direction, and a motor terminal and an external input end which are formed on the substrate; wherein the method comprises the steps of

The motor wiring terminal is used for being connected with a pin inserted on the terminal block, and the external input end is used for being connected with the connector; and

and mounting positioning holes which are used for being matched and connected with at least two positioning columns one by one are also formed in the substrate at intervals.

In an alternative embodiment of the utility model, the shaft side end of the coil framework provided with the terminal block is also provided with a shaft hole suitable for the insertion of a gear shaft; and

the intermediate gear set comprises a first transmission gear, a second transmission gear and a third transmission gear which are sequentially connected; the first transmission gear is connected with the driving gear; the third transmission gear is connected with the output gear; the gear shaft of the first transmission gear is fixed on the shaft hole.

In an alternative embodiment of the present utility model, the housing includes a lower housing and an upper housing cover that are coupled together; the motor is assembled in the lower shell; and

the upper shell cover is suitable for being propped against the PCB circuit board from one side end of the PCB circuit board back-to-back line framework.

By adopting the technical scheme, the utility model has the following beneficial effects: the stator assembly and the air door actuator using the stator assembly are provided with the supporting and connecting assembly for being matched with the PCB circuit board directly at the same shaft side end of the coil framework, so that the structure of the motor can be simplified, and the motor is prevented from being provided with other end cover structures; on the other hand, the PCB circuit board is directly assembled at one axial side end of the coil framework and is connected with the contact pin on the terminal block positioned at the same axial side end, so that the structure is beneficial to the more compact space layout of the inner cavity of the shell of the air door actuator due to the fact that the assembly space of the axial side end of the motor is effectively utilized; but can facilitate automatic production and assembly. The whole volume of the PCB can be reduced on the basis that the PCB is conveniently and automatically connected with the motor.

Furthermore, the positioning columns arranged on the coil framework of the motor are matched with the mounting positioning holes of the substrate to realize quick positioning during circuit board mounting, and automatic production can be facilitated. The support block on the coil framework and the abutting column in the upper shell cover are matched again to realize stable installation of the circuit board, under the structure, the circuit board can be fastened through the fastening assembly between the upper shell body and the lower shell cover, so that an additional fastening structure is not required to be designed for the whole circuit board, the assembly process of the whole circuit board is simplified, and the stability of the use state of the circuit board in the outer shell body can be effectively guaranteed through the way that the upper shell body and the lower shell cover clamp the circuit board.

Drawings

FIG. 1 is a schematic exploded view of the damper actuator of the present utility model;

FIG. 2 is a schematic illustration of the mating structure of the motor and gear arrangement in the damper actuator of the present utility model;

FIG. 3 is a schematic diagram of an exploded construction of a stator assembly and a PCB circuit board of the damper actuator of the present utility model;

FIG. 4 is a schematic structural view of the stator assembly of the damper actuator of the present utility model;

FIG. 5 is a schematic diagram of the mating structure of the stator assembly of the damper actuator of the present utility model and a PCB circuit board;

FIG. 6 is a schematic structural view of the bobbin of the stator assembly of the damper actuator of the present utility model;

FIG. 7 is a schematic structural view of the housing of the stator assembly of the damper actuator of the present utility model;

FIG. 8 is a schematic view of the structure of the A-side of the PCB of the damper actuator of the present utility model;

FIG. 9 is a schematic view of the structure of the B side of the PCB of the damper actuator of the present utility model;

fig. 10 is a schematic view of the structure of the upper housing cover of the damper actuator of the present utility model.

In the figure: the motor comprises a motor 1, a coil skeleton 11, a shaft hole 12, a terminal block 13, a contact pin 15, a yielding groove 14, a machine shell 16, a circular through hole 17, a claw pole 18, a claw pole yielding groove 19, a driving gear 2, an output gear 3, a first transmission gear 51, a gear shaft 511, a second transmission gear 52, a third transmission gear 53, a base plate 101, an electronic component 102, a chip 103, a motor terminal 104, an external input end 105, an installation positioning hole 106, a lower shell 201, an upper shell cover 202, a positioning column 203, a supporting block 205, an abutting column 206, a coupler 300, a grounding spring 400, an installation hole 500 and a rotor assembly 600.

Detailed Description

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

Example 1:

referring to fig. 1 to 8, the present embodiment provides a stator assembly, including: a coil frame 11, a terminal block 13 arranged at the same axial side end of the coil frame 11 and a support connecting component for being matched with a PCB circuit board; the terminal block 13 and the support connection assembly are provided on the same shaft side end of the bobbin 11, and the shaft side end is adapted to be protruded from the rotation shaft of the rotor assembly 600 when the stator assembly is coupled with the rotor assembly 600. The terminal block 13 in the present embodiment is provided at the circumferential edge of the axial side end of the bobbin 11 and extends in the radial direction of the bobbin 11.

More specifically, the terminal block 13 is provided with a via hole for being matched with the contact pin 15, the contact pin 15 is bent after being pressed into the via hole, so that an enameled wire parallel terminal and a circuit board connecting end are formed, and the circuit board connecting end is perpendicular to the terminal block 13 and forms 90 degrees with the enameled wire welding end.

It should be noted that, the support connection assembly used in this embodiment includes at least three support blocks 205 disposed on the coil bobbin 11 at intervals, and the at least three support blocks 205 are adapted to jointly support the end face of the PCB circuit board facing the coil bobbin 11. The specific shape of the support block 205 in the present embodiment is not limited in any way, and may be a regular columnar structure or an irregular structure, as long as the end surface of the support block 205 that contacts the substrate 101 of the PCB is flat.

It should be noted that, for the three support blocks 205 here, one of the support blocks 205 may be replaced by the terminal block 13, that is, the entire terminal block 13 may perform a supporting function for the PCB.

Based on the above structure, the supporting and connecting assembly further includes at least two positioning posts 203 disposed on the coil former 11 at intervals for being engaged with the PCB. In an alternative embodiment, the positioning post 203 may be separately designed on the shaft end portion of the output shaft of the motor 300 protruding; in an alternative implementation case, the positioning posts 203 may be directly disposed on the support block 205, and in this case, the support block 205 is of a cylindrical structure, for example, the outer diameter of the support block 205 is larger than that of the positioning posts 203, so that the positioning posts 203 may not affect the support fit of the support block 205 to the substrate 101.

Two positioning posts 203 are provided on the coil bobbin 11 in combination with the drawings as an example. The positioning posts 203 are used for matching with the prefabricated mounting positioning holes 106 on the PCB. The positioning column 203 can be matched with the mounting positioning hole 106 on the PCB circuit board to realize the positioning in the mounting process of the PCB circuit board.

Based on the above-described structure, it is also necessary to say that, in an alternative implementation, at least two positioning posts 203 and at least three support blocks 205 in this embodiment are integrally injection-molded on the coil bobbin 11 for convenience of processing.

Further, a mounting hole 500 for accommodating the grounding spring 400 is formed in the terminal block 13. With this structure, when the PCB and the support connection assembly are assembled in place, the grounding spring 400 is in abutting connection with the PCB (when the stator assembly is applied to a specific damper actuator, the PCB is fixed in the housing of the damper actuator, i.e., when the PCB is assembled in place, the grounding spring 400 can be in abutting connection with the PCB).

In addition, the stator assembly of the present embodiment further includes a circular through hole 17 formed in the axial side end of the casing 16 facing away from the terminal block 13 coaxially with the casing 16; and the hole edge of the circular through hole 17 is provided with a plurality of claw poles 18 which are bent towards the inner cavity of the shell 16 at intervals along the circumferential direction; the corresponding bobbin 11 is formed with a plurality of claw pole avoiding grooves 19 adapted to one-to-one embedding of a plurality of claw poles 18 at the shaft ends facing away from the terminal block 13.

In addition, it should be noted that, the stator assembly in this embodiment further includes a casing 16 sleeved outside the coil skeleton 11; and a recess 14 for allowing part of the terminal block 13 to be inserted is formed in the side wall of the housing 16. Based on the structure, further, the depth X of the relief groove 14 along the axial direction of the casing 16 is not more than one third of the axial length Y of the casing 16, namely X is less than or equal to (1/3) Y; the design is to reduce the probability of magnetic leakage of the motor 1 adopting the stator assembly and reduce electromagnetic sound during operation.

Example 2:

referring to fig. 1 to 10, on the basis of the stator assembly of embodiment 1, this embodiment provides a damper actuator, including: the motor 1, the driving gear 2, the middle gear set and the output gear 3 are arranged in the shell, wherein the driving gear 2 is directly driven by the motor 1, the middle gear set is in transmission fit with the driving gear 2, and the output gear 3 is in transmission fit with the middle gear set; the shell comprises a lower shell 201 and an upper shell cover 202 which are connected in a matching way; the motor 1 is assembled in the lower housing 201.

In more detail, first, the motor 1 may be a stepper motor including the stator assembly of embodiment 1, and a rotor assembly 600 and a PCB wiring board respectively coupled with the stator assembly; and the damper actuator further includes a coupler 300 connected to the PCB circuit board.

Secondly, the PCB circuit board includes: a substrate 101, electronic components 102 provided on both side end surfaces (in the embodiment, both side end surfaces are defined as a surface and B surface, respectively) in the thickness direction of the substrate 101, and a motor terminal 104 and an external input terminal 105 formed on the substrate 101; wherein the motor terminal 104 is used for connecting with the pin 15 inserted on the terminal block 13, and the external input terminal 105 is used for connecting with the coupler 300. The base plate 101 is also provided with mounting positioning holes 106 at intervals for one-to-one mating with the positioning posts 203.

Under a specific and alternative implementation condition, the electronic components 102 adopted in the embodiment are patch-type components, and the power tubes 102 in the electronic components respectively located at two side end surfaces of the substrate 101 are in mirror symmetry structures relative to the thickness direction of the substrate 101, so that the electronic components located at two side end surfaces under the layout are similar in physical structure distance, and the control current synchronism generated by two groups of coils of the motor 300 when the PCB circuit board is applied to the damper actuator is better.

In addition, the PCB adopted in the embodiment further includes a chip 103 disposed on one of side end surfaces in a basic thickness direction, and since the chip 103 and the electronic component 102 are both electronic components with relatively high heat generation in use, in order to facilitate heat dissipation of the PCB, in the embodiment, the electronic component 102 is disposed on a portion of the substrate 101 adjacent to the motor terminal 104, and the chip 103 is disposed on a portion of the substrate 101 far from the motor terminal 104; with such a structure, the heat generated by the operation of the electronic component 102 and the chip 103 can be dissipated more quickly, and the heat dissipation performance of the PCB is optimized, so that the service life of the PCB is prolonged.

Considering that the compactness of the internal structural layout of the shell is further improved, thereby reducing the volume of the whole air door actuator, the embodiment also makes the following design:

the axial side end of the coil frame 11 provided with the terminal block 13 is also provided with an axial hole 12 which is suitable for the insertion of the gear shaft 511; and the intermediate gear set includes a first transmission gear 51, a second transmission gear 52 and a third transmission gear 53 which are sequentially connected; the first transmission gear 51 is connected with the driving gear 2; the third transmission gear 53 is connected with the output gear 3; the gear shaft 511 of the first transmission gear 51 is fixed to the shaft hole 12, so that the axial space of the motor 1 can be fully utilized, thereby further improving the compactness of the housing inner space.

Finally, to meet the requirement of the PCB circuit board of the present embodiment for assembly and fixation in the housing, the upper housing cover 202 of the present embodiment is further adapted to be pressed against the PCB circuit board from a side end of the PCB circuit board facing away from the wire frame 11. Under this structure, the PCB is effectively fixed in the housing of the damper actuator by the fastening assembly of the upper case cover 202 and the lower case 201, and the grounding spring is connected with the PCB in an abutting manner.

In this regard, in an alternative implementation case, in order to achieve the pressing of the upper case cover 202 against the circuit board, the end surface of the upper case cover 202 facing the lower case 201 in this embodiment is further provided with at least two abutment posts 206 adapted to press against the PCB circuit board. The abutment post 206 here may be shaped in the same structure as the support block 205 in the lower housing 201. It should be noted that, when the PCB is clamped between the upper case cover 202 and the lower case 201, the abutment posts 206 may be opposite to the supporting blocks 205, or the abutment posts 206 may be offset with respect to the supporting blocks 205, which satisfies the requirement of the present embodiment, and the present embodiment is not limited in any way. Note that, the specific shape of the contact post 206 in the present embodiment is not limited in any way, and may be a regular columnar structure or an irregular structure, as long as the end surface of the contact post 206 that contacts the substrate 101 of the PCB can be flat.

In summary, for the damper actuator of the present embodiment, the effective utilization of the assembly space of the shaft-side end of the motor 1 is improved, which is advantageous in making the space layout of the inner cavity of the housing of the damper actuator more compact.

Furthermore, fastening to the PCB circuit board can be formed through the fastening assembly between last casing and the lower cap to holistic circuit board need not design extra fastening structure, simplified holistic PCB's assembly process, and can effectively guarantee PCB in the stability of casing service condition through the mode of last casing and lower cap clamp PCB circuit board.

The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present utility model, and are more fully described herein with reference to the accompanying drawings, in which the principles of the present utility model are shown and described, and in which the general principles of the utility model are defined by the appended claims.

In the description of the present utility model, it should be understood that the terms "orientation" or "positional relationship" are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present utility model, unless expressly stated or limited otherwise, a first feature may include first and second features directly contacting each other, either above or below a second feature, or through additional features contacting each other, rather than directly contacting each other. Moreover, the first feature being above, over, and on the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being below, beneath, and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is less level than the second feature.

Claims (10)

1. A stator assembly, comprising: the coil framework is provided with a terminal block and a supporting and connecting assembly, wherein the terminal block is arranged on the same axial side end of the coil framework, and the supporting and connecting assembly is used for being matched with a PCB circuit board; wherein the method comprises the steps of

The support connecting assembly comprises at least three support blocks which are arranged on the coil framework at intervals, and the at least three support blocks are suitable for jointly supporting the end face of the PCB towards the coil framework;

the terminal block is arranged at the circumferential edge of the axial side end of the coil framework and extends in the radial direction of the coil framework; and

the support connecting assembly further comprises at least two positioning columns which are arranged on the coil framework at intervals and used for being matched with the PCB in a clamping mode.

2. The stator assembly of claim 1 wherein at least two of the positioning posts and at least three support blocks are integrally injection molded onto the bobbin.

3. A stator assembly according to claim 1 or claim 2 wherein the terminal block is further formed with mounting holes for receiving ground springs.

4. The stator assembly of claim 1 or 2, further comprising a casing sleeved outside the coil former; and

and a yielding groove suitable for embedding part of the terminal block is formed on the side wall of the shell.

5. The stator assembly of claim 4, wherein the relief groove has a depth along an axial direction of the housing that is no greater than one third of an axial length of the housing.

6. The stator assembly according to claim 4, wherein a shaft side end of the housing facing away from the terminal block is formed with a circular through hole coaxial with the housing; and

the hole edge of the circular through hole is provided with a plurality of claw poles which are bent towards the inner cavity of the shell at intervals along the circumferential direction; the corresponding shaft ends of the coil frameworks, which are opposite to the terminal blocks, are provided with a plurality of claw pole avoiding grooves which are suitable for one-to-one embedding of a plurality of claw poles.

7. A damper actuator, comprising: the device comprises a shell, a motor, a driving gear directly driven by the motor, an intermediate gear set in transmission fit with the driving gear, and an output gear in transmission fit with the intermediate gear set, wherein the motor is arranged in the shell; wherein the method comprises the steps of

The motor comprises a stator assembly as claimed in any one of claims 1 to 6, and a rotor assembly and a PCB circuit board respectively coupled with the stator assembly; and

the air door actuator further comprises a coupler connected with the PCB.

8. The damper actuator of claim 7, wherein the PCB circuit board comprises: the electronic component comprises a substrate, electronic components respectively arranged on two side end surfaces of the substrate in the thickness direction, and a motor terminal and an external input end which are formed on the substrate; wherein the method comprises the steps of

The motor wiring terminal is used for being connected with a pin inserted on the terminal block, and the external input end is used for being connected with the connector; and

and mounting positioning holes which are used for being matched and connected with at least two positioning columns one by one are also formed in the substrate at intervals.

9. The damper actuator according to claim 7, wherein the axial side end of the bobbin provided with the terminal block is further provided with an axial hole adapted for insertion of a gear shaft; and

the intermediate gear set comprises a first transmission gear, a second transmission gear and a third transmission gear which are sequentially connected; the first transmission gear is connected with the driving gear; the third transmission gear is connected with the output gear; the gear shaft of the first transmission gear is fixed on the shaft hole.

10. The damper actuator of claim 7, wherein the housing comprises a lower housing and an upper housing cover that are matingly connected; the motor is assembled in the lower shell; and

the upper shell cover is suitable for being propped against the PCB circuit board from one side end of the PCB circuit board back-to-back line framework.