Rotary actuator of automobile air conditioner

Abstract

The invention provides a rotary actuator of an automobile air conditioner. The rotary actuator comprises a middle transmission assembly, an output gear, a stator assembly, a driving circuit board and a rotor assembly, the driving circuit board is respectively connected with an external signal line and the stator assembly, the rotor assembly comprises a permanent magnet part and a gear part, the permanent magnet part is matched with the stator assembly, and the intermediate transmission assembly is respectively meshed with the gear part of the rotor assembly and the output gear. The transmission assembly is used for transmitting rotation of the gear part of the rotor assembly to the output gear; a gear shaft of the output gear is connected with a target shaft of the air conditioner to drive the target shaft to rotate, and control over rotation of a target object of the air conditioner is achieved. The problems of axial movement and large vibration noise of the motor are solved, the operation is stable, the noise is low, and the transmission efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of automobile air conditioners, and in particular to an automobile air conditioner rotary actuator. Background Art

[0002] As people's requirements for the riding experience continue to improve, the performance of the automotive air conditioning system, as one of the key factors affecting the comfort level in the car, has received more and more attention. The automotive air conditioner can not only effectively regulate the temperature in the car, but also adjust the airflow by changing the direction of the air outlet grille to meet the needs of different passengers or adapt to different driving environments. This directional adjustment is mainly achieved by the automotive air conditioner rotary actuator.

[0003] The common automotive air conditioner rotary actuators on the market usually use DC motors or stepper motors as power sources to control the position and angle of the grille. Although this design is quite mature and widely used in various types of vehicles, there are still some problems that cannot be ignored:

[0004] 1. Axial movement: During the operation of the motor, due to the influence of factors such as the matching clearance between the mechanical structures, axial movement is likely to occur. This will not only affect the accuracy of the actuator's control of the grid position, but may also cause the stability of the entire system to decrease.

[0005] 2. Noise problem: In addition to the unstable movement mentioned above, the vibration generated by the motor when it is working will also turn into obvious noise pollution. For users who pursue a high-quality driving experience, such sound interference is obviously unacceptable. Summary of the invention

[0006] Based on the above problems, the present invention provides an automobile air-conditioning rotary actuator, aiming to solve the technical problems of axial movement and noise in the automobile air-conditioning rotary actuator in the prior art.

[0007] A rotary actuator for an automobile air conditioner comprises a housing and a lower cover which are fixedly connected up and down, wherein the housing and the lower cover form a receiving cavity, and the receiving cavity comprises an intermediate transmission component, an output gear, and a stator component, a driving circuit board and a rotor component constituting a brushless motor;

[0008] The driving circuit board is connected to the external signal line and the stator assembly respectively, and is used to receive the control signal transmitted by the external signal line to control the current change of the stator coil in the stator assembly;

[0009] The rotor assembly includes a permanent magnet part and a gear part. The permanent magnet part cooperates with the stator assembly and rotates due to the change of the magnetic field generated by the current change of the stator coil, thereby driving the gear part of the rotor assembly to rotate.

[0010] The intermediate transmission assembly is respectively meshed with the gear portion of the rotor assembly and the output gear, and is used to transmit the rotation of the gear portion of the rotor assembly to the output gear;

[0011] An axis connecting portion is provided in the first axis end of the gear shaft of the output gear, and a first hole is provided on the outer shell. The axis connecting portion of the output gear and the target shaft of the air conditioner are connected through the first hole. The rotation of the output gear drives the target shaft to rotate, thereby realizing the control of the rotation of the target object of the air conditioner.

[0012] Further, the intermediate transmission assembly includes a primary gear, a secondary gear and a tertiary gear;

[0013] The first-stage gear, the second-stage gear and the third-stage gear are all provided with a large gear part and a small gear part;

[0014] The large gear portion of the first gear meshes with the gear portion of the rotor assembly, and the small gear portion of the first gear meshes with the large gear portion of the second gear;

[0015] The small gear portion of the secondary gear meshes with the large gear portion of the tertiary gear;

[0016] The pinion portion of the tertiary gear meshes with the gear portion of the output gear.

[0017] Furthermore, a first positioning shaft, a second positioning shaft, a third positioning shaft and a fourth positioning shaft are fixed to the inner surface of the lower cover;

[0018] The first positioning shaft passes through the central through hole of the rotor assembly to realize the positioning of the rotor assembly;

[0019] The second positioning shaft passes through the central through hole of the first-stage gear to realize the positioning of the first-stage gear;

[0020] The third positioning shaft passes through the central through hole of the secondary gear to realize the positioning of the secondary gear;

[0021] The fourth positioning shaft passes through the central through hole of the third-stage gear to realize the positioning of the third-stage gear.

[0022] Further, the gear shaft of the output gear also has a second shaft end, and the gear portion of the output gear is between the second shaft end and the first shaft end;

[0023] The inner surface of the lower cover is also provided with a positioning boss, and a second hole is provided in the positioning boss;

[0024] The second hole and the second shaft end of the output gear are rotatably matched to achieve positioning of the output gear.

[0025] Further, the upper end surface of the first shaft end of the output gear is flush with the outer extension of the first hole;

[0026] The shaft connection portion is a clamping slot hole of the first shaft end of the output gear;

[0027] The target shaft of the air conditioner is inserted into the engaging slot to achieve engaging with the output gear.

[0028] Further, the stator assembly includes laminated silicon steel sheets, a coil frame, a stator coil and a metal pin;

[0029] The coil frame and the silicon steel sheet are fixedly connected, the metal pins are fixed on the coil frame and welded to the driving circuit board;

[0030] The stator coil is wound on the coil frame, and both ends of the stator coil are welded to the metal pins.

[0031] Further, the driving circuit board is on the stator assembly;

[0032] The lower cover also includes a plug-in extension port.

[0033] The external signal line is electrically connected to the external connector of the driving circuit board through the connector extension port.

[0034] Further, the driving circuit board is on the stator assembly;

[0035] The driving circuit board has a third opening;

[0036] The permanent magnet part of the rotor assembly is arranged in the central area of ​​the silicon steel sheet winding, and the gear part of the rotor assembly protrudes from the upper surface of the driving circuit board through the third hole.

[0037] Furthermore, the outer shell and the lower cover are connected in a snap-fit ​​manner.

[0038] Further, the side of the housing has a protrusion;

[0039] The edge of the lower cover is provided with a spring;

[0040] The protrusion and the spring piece are engaged with each other to realize the snap connection between the outer shell and the lower cover.

[0041] The beneficial technical effect of the present invention is that a driving circuit board is set to receive an external signal to control the change of the coil current of the stator assembly, thereby generating a magnetic field to drive the rotor to rotate. The rotor transmits the rotation to the target axis of the air conditioner to control the rotation of the target axis. The brushless motor composed of the driving circuit board, the stator assembly and the rotor assembly solves the problem of axial movement and the problem of high vibration and noise of the motor. It runs smoothly, has low noise and high transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the overall structure of an automobile air-conditioning rotary actuator of the present invention;

[0043] Figure 2 An exploded view of an automobile air-conditioning rotary actuator according to the present invention;

[0044] Figure 3 and Figure 6 This is a schematic diagram of the internal transmission of an automobile air-conditioning rotary actuator of the present invention;

[0045] Figure 4 This is a schematic diagram of the output gear structure of an automobile air-conditioning rotary actuator of the present invention;

[0046] Figure 5 This is a schematic structural diagram of a rotor assembly of a rotary actuator for an automobile air conditioner according to the present invention;

[0047] Figure 7 This is a schematic diagram of the coordination of a stator assembly, a drive circuit board, and a rotor assembly of a rotary actuator for an automobile air conditioner according to the present invention;

[0048] Figure 8 It is a structural schematic diagram of a stator assembly of a rotary actuator for an automobile air conditioner according to the present invention;

[0049] in,

[0050] 1-housing; 1a-bump; 1b-first opening; 1c-external connection hole;

[0051] 2- rotor assembly; 2a- permanent magnet portion; 2b- gear portion of the rotor assembly; 2c- central through hole of the rotor assembly;

[0052] 3-first gear; 3a-center hole of first gear;

[0053] 4-secondary gear; 4a-central through hole of the secondary gear;

[0054] 5-third-stage gear; 5a-center through hole of the third-stage gear;

[0055] 6-output gear; 6a-shaft connecting portion; 6b-first shaft end of the gear shaft of the output gear;

[0056] 7-driving circuit board; 7a-third opening;

[0057] 8-stator assembly; 8-1-silicon steel sheet; 8-2-coil frame; 8-3-stator coil; 8-4-metal pin;

[0058] 9-lower cover; 9a-spring; 9-1-first positioning axis; 9-2-second positioning axis; 9-3-third positioning axis; 9-4-fourth positioning axis; 9b-plug-in extension port; 9c-second orifice. DETAILED DESCRIPTION

[0059] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0061] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0062] See also Figure 1-6 The present invention provides a rotary actuator for an automobile air conditioner, comprising a housing (1) and a lower cover (9) fixedly connected to each other, the housing (1) and the lower cover (9) forming a receiving cavity, the receiving cavity comprising an intermediate transmission component, an output gear (6), and a stator component (8), a driving circuit board (7) and a rotor component (2) constituting a brushless motor;

[0063] The driving circuit board (7) is respectively connected to the external signal line and the stator assembly (8), and is used to receive the control signal transmitted by the external signal line to control the current change of the stator coil in the stator assembly (8);

[0064] The rotor assembly (2) comprises a permanent magnet portion (2a) and a gear portion (2b); the permanent magnet portion (2a) cooperates with the stator assembly (8) and rotates due to the change in the magnetic field generated by the change in the current of the stator coil, thereby driving the gear portion (2b) of the rotor assembly (2) to rotate;

[0065] The intermediate transmission assembly is respectively meshed with the gear portion (2b) of the rotor assembly (2) and the output gear (6), and is used to transmit the rotation of the gear portion (2b) of the rotor assembly (2) to the output gear (6);

[0066] A shaft connecting portion (6a) is provided in the first shaft end (6b) of the gear shaft of the output gear (6), and a first hole (1b) is provided on the housing (1). The shaft connecting portion (6a) of the output gear (6) and a target shaft of the air conditioner are connected via the first hole (1b). The rotation of the output gear (6) drives the target shaft to rotate, thereby realizing the control of the rotation of the target object of the air conditioner.

[0067] The permanent magnet part (2a) of the rotor assembly (2), the driving circuit board (7) and the stator assembly (8) constitute a brushless motor, which solves the problems of high noise and axial movement of the actuator in the prior art. The driving circuit board is arranged to receive an external signal to control the change of the current in the coil of the stator assembly, thereby generating a magnetic field to drive the rotor to rotate. The rotor transmits the rotation to the target axis of the air conditioner to control the rotation of the target axis. The brushless motor composed of the driving circuit board, the stator assembly and the rotor assembly solves the problem of axial movement and the problem of high vibration and noise of the motor, and runs smoothly, has low noise and high transmission efficiency.

[0068] Specifically, the target axis is the air conditioner outlet grille axis. The target object is the air conditioner outlet grille.

[0069] Specifically, the external signal line is a LIN signal line. LIN (Local Interconnect Network) is a low-cost serial communication protocol mainly used for communication between subsystems in a car. The present invention uses a brushless motor solution, uses a LIN signal to drive the brushless motor to operate, drives the rotor to operate through the stator of the brushless motor, thereby driving the intermediate transmission component to operate, and finally drives the air outlet grille shaft of the air conditioner to swing through the output gear to achieve the angle adjustment of the air outlet of the air conditioner.

[0070] Specifically, the driving circuit board (7) is a driving PCB board.

[0071] Furthermore, the intermediate transmission assembly includes a primary gear (3), a secondary gear (4) and a tertiary gear (5);

[0072] The first-stage gear (3), the second-stage gear (4) and the third-stage gear (5) are all provided with a large gear part and a small gear part;

[0073] The large gear portion of the primary gear (3) is meshed with the gear portion (2b) of the rotor assembly (2), and the small gear portion of the primary gear (3) is meshed with the large gear portion of the secondary gear (4);

[0074] The small gear portion of the secondary gear (4) is meshed with the large gear portion of the tertiary gear (5);

[0075] The pinion portion of the third-stage gear (5) meshes with the gear portion of the output gear (6).

[0076] The speed ratio and rotation direction are controlled by the design of large and small gears.

[0077] Specifically, the gear portion (2b) of the rotor assembly (2) is a straight tooth.

[0078] The gear portion of the output gear (6) is a straight tooth.

[0079] Specifically, the gear portion (2b) of the rotor assembly (2) is at the upper end of the rotor assembly (2), the large gear of the first gear (3) is at the bottom and the small gear is at the top. The large gear of the second gear (4) is at the top and the small gear is at the bottom. The large gear of the third gear (5) is at the top and the small gear is at the bottom. The upper small gear of the first gear (3) is meshed with the upper large gear of the second gear (4), the lower small gear of the second gear (4) is meshed with the upper large gear of the third gear (5), and the lower small gear of the third gear (5) is meshed with the gear portion of the output gear (6). The gradually lowering design saves space, improves space utilization, and is conducive to the miniaturization of the actuator.

[0080] Furthermore, a first positioning shaft (9-1), a second positioning shaft (9-2), a third positioning shaft (9-3) and a fourth positioning shaft (9-4) are fixed on the inner surface of the lower cover (9);

[0081] The first positioning shaft (9-1) penetrates the central through hole (2c) of the rotor assembly (2) to achieve positioning of the rotor assembly (2);

[0082] The second positioning shaft (9-2) penetrates the central through hole (3a) of the first-stage gear (3) to achieve positioning of the first-stage gear (3);

[0083] The third positioning shaft (9-3) penetrates the central through hole (4a) of the secondary gear (4) to achieve positioning of the secondary gear (4);

[0084] The fourth positioning shaft (9-4) penetrates the central through hole (5a) of the third-stage gear (5) to achieve positioning of the third-stage gear (5).

[0085] The first positioning shaft (9-1) positions the rotor assembly (2) so that the rotor assembly (2) rotates around the first positioning shaft (9-1).

[0086] The second positioning shaft (9-2) positions the first-stage gear (3), so that the first-stage gear (3) rotates around the second positioning shaft (9-2).

[0087] The third positioning shaft (9-3) positions the secondary gear (4), so that the secondary gear (4) rotates around the third positioning shaft (9-3).

[0088] The fourth positioning shaft (9-4) positions the third-stage gear (5), so that the third-stage gear (5) rotates around the fourth positioning shaft (9-4).

[0089] Specifically, the lower ends of the first positioning shaft (9-1), the second positioning shaft (9-2), the third positioning shaft (9-3) and the fourth positioning shaft (9-4) are all provided with limiting columns, and the diameter of the limiting columns is larger than the corresponding central through hole, so as to prevent the lower end faces of the gears of each level and the rotor assembly (2) of the intermediate transmission assembly from contacting the inner surface of the lower cover (9), and the friction generated by contacting the inner surface of the lower cover during rotation affects the rotation effect.

[0090] The central through hole (2c) of the rotor assembly (2), the central through hole (3a) of the first gear (3), the central through hole (4a) of the second gear (4), and the central through hole (5a) of the third gear (5) are all circular hole structures that penetrate from top to bottom. When the stator coil is driven and controlled by the driving circuit board (7), the current changes, and the magnetic field inside the stator coil changes regularly. The permanent magnet (2b) on the rotor assembly (2) rotates (forward or reverse) with the change of the magnetic field, and the gear part (2b) on the rotor assembly (2) also rotates (forward or reverse) accordingly.

[0091] Furthermore, the gear shaft of the output gear (6) also has a second shaft end, and the gear portion of the output gear (6) is between the second shaft end and the first shaft end (6b);

[0092] The inner surface of the lower cover (9) is also provided with a positioning boss, and a second hole (9c) is provided in the positioning boss;

[0093] The second hole (9c) and the second shaft end of the output gear (6) are rotatably matched to achieve positioning of the output gear (6).

[0094] The function of the positioning boss is also to prevent the gear portion of the output gear (6) from contacting the inner surface of the lower cover (9), thereby preventing friction with the inner surface of the lower cover (9) during rotation, thereby affecting the rotation effect.

[0095] Furthermore, the upper end surface of the first shaft end (6b) of the output gear (6) is flush with the outer extension of the first hole (1b);

[0096] The shaft connection portion (6a) is a clamping slot hole of the first shaft end (6b) of the output gear (6);

[0097] The target shaft of the air conditioner is inserted into the engaging slot to achieve engaging with the output gear (6).

[0098] Specifically, the snap-in slot is a plum blossom slot.

[0099] Furthermore, the stator assembly (8) comprises stacked silicon steel sheets (8-1), a coil frame (8-2), a stator coil (8-3) and a metal pin (8-4);

[0100] The coil frame (8-2) and the silicon steel sheet (8-1) are fixedly connected, and the metal pin (8-4) is fixed on the coil frame (8-2) and welded to the driving circuit board (7);

[0101] The stator coil (8-3) is wound on the coil frame (8-2), and two ends of the stator coil (8-3) are welded on the metal pins (8-4).

[0102] The stator coil (8-3) is an enameled copper wire.

[0103] The silicon steel sheet (8-1) is used for magnetic conduction. As an embodiment of the present invention, the shape of the silicon steel sheet (8-1) is designed to be a three-blade shape, and the central area of ​​the three blades is empty for placing the rotor assembly (2). Each blade of the three blades of the silicon steel sheet (8-1) has an empty sub-area connected to the central area, each sub-area accommodates a coil frame (8-2), and each coil frame (8-2) is wound with a stator coil (8-3). Each coil frame and its respective metal pin (8-4) are injection molded together.

[0104] Specifically, the inner surface of the lower cover (9) is provided with a positioning groove for the stator assembly (8), and the positioning groove is used to limit the stator assembly (8), so as to confine the stator assembly (8) in the positioning groove of the lower cover (9) to prevent the stator assembly (8) from moving at will.

[0105] The metal pins (8-4) on the stator assembly (8) are welded to the driving circuit board (7) to achieve current conduction between the circuit board and the stator coil. The driving circuit board (7) controls the current changes of each group of stator coils of the stator assembly (8) to drive the motor to operate.

[0106] Furthermore, the driving circuit board (7) is on the stator assembly (8);

[0107] The lower cover (9) also includes a plug-in extension port (9b).

[0108] The external signal line is electrically connected to the external connector of the driving circuit board (7) through the connector extension port (9b).

[0109] The chip of the driving circuit board (7) has a software burning function, and different software is burned according to different requirements, so that the driving circuit board (7) is controlled by an external LIN signal and has the functions of receiving an external LIN signal, outputting a LIN signal, driving the motor to run, adjusting the motor running speed, etc.

[0110] Furthermore, the driving circuit board (7) is on the stator assembly (8);

[0111] The driving circuit board (7) has a third opening (7a);

[0112] The permanent magnet part (2a) of the rotor assembly (2) is arranged in the central area of ​​the silicon steel sheet (8-1), and the gear part (2b) of the rotor assembly (2) protrudes from the upper surface of the driving circuit board (7) through the third hole (7a).

[0113] By placing the driving circuit board (7) on the stator assembly (8) and providing a third opening (7a) for the gear part (2b) of the rotor assembly (2) to protrude through, the brushless motor structure is made compact, and the use space is saved, thereby miniaturizing the actuator.

[0114] Furthermore, the outer shell (1) and the lower cover (9) are connected in a snap-fit ​​manner.

[0115] Furthermore, the side edge of the housing (1) has a protrusion (1a);

[0116] A spring sheet (9a) is provided on the edge of the lower cover (9);

[0117] The protrusion (1a) and the spring sheet (9a) engage with each other to achieve a snap connection between the housing (1) and the lower cover (9).

[0118] The spring sheet (9a) and the projection (1a) are combined into a buckle structure, and multiple groups of buckle structures work together to ensure that the outer shell (1) and the lower cover (9) are firmly fixed. This production and installation is simple and easy to operate. Of course, the lower cover (9) and the outer shell (1) can also be connected in a detachable manner.

[0119] Specifically, four corners of the housing (1) are provided with external connection holes (1c), which are specifically threaded holes, and the actuator is fixed to an external device by bolt connection.

[0120] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary actuator for an automobile air conditioner, characterized in that: The invention comprises a housing (1) and a lower cover (9) which are fixedly connected to each other, wherein the housing (1) and the lower cover (9) form a receiving cavity, wherein the receiving cavity contains an intermediate transmission component, an output gear (6), and a stator component (8), a drive circuit board (7) and a rotor component (2) constituting a brushless motor; The driving circuit board (7) is respectively connected to the external signal line and the stator assembly (8), and is used to receive a control signal transmitted by the external signal line to control the current change of the stator coil in the stator assembly (8); The rotor assembly (2) comprises a permanent magnet portion (2a) and a gear portion (2b); the permanent magnet portion (2a) cooperates with the stator assembly (8) and rotates due to a change in the magnetic field generated by a change in the current of the stator coil, thereby driving the gear portion (2b) of the rotor assembly (2) to rotate; The intermediate transmission assembly is respectively meshed with the gear portion (2b) of the rotor assembly (2) and the output gear (6), and is used to transmit the rotation of the gear portion (2b) of the rotor assembly (2) to the output gear (6); A shaft connecting portion (6a) is provided at a first shaft end (6b) of the gear shaft of the output gear (6), and a first opening (1b) is provided on the housing (1). The shaft connecting portion (6a) of the output gear (6) and a target shaft of the air conditioner are connected via the first opening (1b). The rotation of the output gear (6) drives the target shaft to rotate, thereby realizing the control of the rotation of the target object of the air conditioner.

2. The automobile air conditioner rotary actuator according to claim 1, characterized in that: The intermediate transmission assembly comprises a primary gear (3), a secondary gear (4) and a tertiary gear (5); The first-stage gear (3), the second-stage gear (4) and the third-stage gear (5) are all provided with a large gear portion and a small gear portion; The large gear portion of the primary gear (3) is meshed with the gear portion (2b) of the rotor assembly (2), and the small gear portion of the primary gear (3) is meshed with the large gear portion of the secondary gear (4); The small gear portion of the secondary gear (4) is meshed with the large gear portion of the tertiary gear (5); The pinion portion of the three-stage gear (5) meshes with the gear portion of the output gear (6).

3. The automobile air conditioner rotary actuator according to claim 2, characterized in that: A first positioning shaft (9-1), a second positioning shaft (9-2), a third positioning shaft (9-3) and a fourth positioning shaft (9-4) are fixed on the inner surface of the lower cover (9); The first positioning shaft (9-1) passes through a central through hole (2c) of the rotor assembly (2) to achieve positioning of the rotor assembly (2); The second positioning shaft (9-2) penetrates the central through hole (3a) of the first-stage gear (3) to achieve positioning of the first-stage gear (3); The third positioning shaft (9-3) penetrates the central through hole (4a) of the secondary gear (4) to achieve positioning of the secondary gear (4); The fourth positioning shaft (9-4) passes through the central through hole (5a) of the third-stage gear (5) to achieve positioning of the third-stage gear (5).

4. The automobile air conditioner rotary actuator according to claim 1, characterized in that: The gear shaft of the output gear (6) also has a second shaft end, and the gear portion of the output gear (6) is between the second shaft end and the first shaft end (6b); The inner surface of the lower cover (9) is also provided with a positioning boss, and the positioning boss is provided with a second hole (9c); The second hole (9c) and the second shaft end of the output gear (6) are rotatably matched to achieve positioning of the output gear (6).

5. The automobile air conditioner rotary actuator according to claim 1, characterized in that: The upper end surface of the first shaft end (6b) of the output gear (6) is flush with the outer extension of the first hole (1b); The shaft connection portion (6a) is a clamping slot hole of the first shaft end (6b) of the output gear (6); The target shaft of the air conditioner is inserted into the engaging slot to achieve engaging with the output gear (6).

6. The automobile air conditioner rotary actuator according to claim 1, characterized in that: The stator assembly (8) comprises stacked silicon steel sheets (8-1), a coil frame (8-2), a stator coil (8-3) and a metal pin (8-4); The coil frame (8-2) and the silicon steel sheet (8-1) are fixedly connected, and the metal pin (8-4) is fixed on the coil frame (8-2) and welded to the driving circuit board (7); The stator coil (8-3) is wound on the coil frame (8-2), and two ends of the stator coil (8-3) are welded to the metal pins (8-4).

7. The automobile air-conditioning rotary actuator according to claim 6, characterized in that: The driving circuit board (7) is above the stator assembly (8); The lower cover (9) further comprises a plug-in extension opening (9b). The external signal line is electrically connected to the external connector of the driving circuit board (7) through the connector extension port (9b).

8. The automobile air-conditioning rotary actuator according to claim 6, characterized in that: The driving circuit board (7) is above the stator assembly (8); The driving circuit board (7) has a third opening (7a); The permanent magnet portion (2a) of the rotor assembly (2) is arranged in the central area of ​​the silicon steel sheet (8-1), and the gear portion (2b) of the rotor assembly (2) protrudes from the upper surface of the drive circuit board (7) through the third hole (7a).

9. The automobile air conditioner rotary actuator according to claim 1, characterized in that: The outer shell (1) and the lower cover (9) are connected in a snap-fit ​​manner.

10. The automobile air conditioner rotary actuator according to claim 9, characterized in that: The side edge of the housing (1) has a protrusion (1a); The edge of the lower cover (9) is provided with a spring sheet (9a); The protrusion (1a) and the spring sheet (9a) are engaged with each other to achieve a snap connection between the housing (1) and the lower cover (9).

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