Air door actuator

Abstract

The utility model relates to the technical field of air door actuators, and discloses an air door actuator which comprises a shell and an electric motor, the shell is provided with a longitudinal shaft, and a wiring port is formed along the longitudinal shaft; the electric motor comprises a rotor and a stator, the rotor is rotationally connected with the shell, the stator comprises three stator coils, and the three stator coils are distributed in the circumferential direction of the rotor at intervals and connected with the shell. The symmetry axis of one of the three stator coils coincides with the longitudinal axis, and the symmetry axes of the other two stator coils and the longitudinal axis are arranged to form an included angle of 60 degrees.

Description

Technical Field

[0001] The utility model relates to the technical field of air damper actuators, and particularly relates to an air damper actuator. Background Art

[0002] The air damper actuator belongs to one of the accessory parts of an automotive air conditioner. The output shaft of the air damper actuator is connected to the blade of the air outlet of the air conditioner. Its main functions are: according to the different requirements of the direction of the air flow for the occupants in the vehicle, by adjusting the position and angle of the blade, to change the direction of the air flow at the air outlet in the vehicle, and it is used when the temperature in the compartment drops or rises. It mainly blows the appropriate air speed and the air flow with the appropriate temperature to the required area to meet the requirements for the flow of the temperature air flow.

[0003] Publication No. CN110199459A discloses an electromechanical actuator. The electromechanical actuator includes a housing and a three-phase electric motor. The housing includes an outer shell. The three-phase electric motor is formed by a stator excited by an electric coil and a magnetized rotor. The three-phase electric motor drives the output shaft by means of a gear train. The axis of the rotor's shaft, the axis of the output shaft, and the axis of the intermediate gear are parallel. The stator has a radial triangular star shape. The three wound magnetic poles of the stator form the three branches of the star. The symmetry axes of two consecutive wound magnetic poles form a mechanical angle of 120°. The housing also includes an electronic circuit. The electronic circuit includes a capacitor for filtering an electric signal. The outer shell has a longitudinal axis. The stator is positioned in the housing such that the symmetry axis of one of the three wound magnetic poles forms an angle between 70° and 110° with the longitudinal axis.

[0004] Since the symmetry axis of one of the three wound magnetic poles forms an angle between 70° and 110° with the longitudinal axis, it causes the wound magnetic poles not to be arranged along the direction of the longitudinal axis of the outer shell, increasing the overall size of the electromechanical brake. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the above technical deficiencies, and propose an air damper actuator to solve the technical problem that the overall size of the air damper actuator increases due to the setting mode of the wound magnetic poles in the prior art.

[0006] To achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides an air damper actuator, including:

[0008] A housing having a longitudinal axis and formed with a wiring port along the longitudinal axis; and

[0009] An electric motor includes a rotor and a stator. The rotor is rotatably connected to the housing. The stator includes three stator coils which are circumferentially spaced apart along the rotor and are all connected to the housing. The axis of symmetry of one of the three stator coils coincides with the longitudinal axis, and the axes of symmetry of the other two stator coils are arranged at an angle of 60° with the longitudinal axis.

[0010] In one embodiment, the stator further includes an outer iron core and three inner iron cores. The outer iron core is formed with a rotor slot and three mounting slots. The outer iron core is sleeved on the rotor through the rotor slot. The three mounting slots are circumferentially spaced apart along the rotor; the three inner iron cores are respectively placed inside the three mounting slots.

[0011] The three stator coils are respectively wound around the three inner iron cores.

[0012] In one embodiment, the outer iron core and the three inner iron cores are integrally formed, and the outer iron core and the three inner iron cores are both formed by stacking silicon steel sheets.

[0013] In one embodiment, the housing includes an upper housing and a lower housing. The upper housing and the lower housing are detachably connected and enclose to form a receiving cavity.

[0014] The rotor and the stator are placed inside the receiving cavity.

[0015] In one embodiment, the upper housing is formed with a first limiting groove, and the lower housing is formed with a second limiting groove.

[0016] The rotor includes a rotating shaft and a magnetic ring. One end of the rotating shaft is rotatably inserted into the first limiting groove, and the other end is rotatably inserted into the second limiting groove. The magnetic ring is sleeved on the rotating shaft.

[0017] In one embodiment, the rotor further includes a bearing. The bearing is sleeved on the rotating shaft and is fitted and placed inside the second limiting groove.

[0018] In one embodiment, the rotor further includes a spring piece. One end of the spring piece is rotatably abutted against the rotating shaft, and the other end is connected to the upper housing.

[0019] In one embodiment, a convex block is formed on the inner wall of the upper housing. The convex block is provided with the first limiting groove relative to the lower housing.

[0020] The spring piece is provided with a through hole relative to the convex block, and a plurality of elastic strips are formed in the through hole of the spring piece. The elastic strips are inclined, and one end of the elastic strips is connected to the spring piece, and the other end gradually approaches the convex block in the direction away from the upper housing.

[0021] In one embodiment, the rotor further includes a rotor gear which is fixedly sleeved on the rotating shaft;

[0022] The upper housing is provided with a first output hole, and the lower housing is provided with a second output hole opposite to the first output hole;

[0023] The damper actuator further includes an output assembly, which includes an output shaft and an output gear. One end of the output shaft is rotatably inserted into the first output hole, and the other end is rotatably inserted into the second output hole. The output gear is fixedly sleeved on the output shaft and meshes with the rotor gear. The output gear is rotatably disposed inside the accommodation cavity.

[0024] In one embodiment, the lower housing is formed with a fixing groove 12b, and a plurality of support ribs are formed in the fixing groove 12b. The plurality of support ribs are spaced apart along the circumferential direction of the first output hole. One end of the output gear is rotatably embedded in the fixing groove 12b and abuts against the plurality of support ribs.

[0025] Compared with the prior art, for the damper actuator provided by the present utility model, the housing itself has a wiring port, and the wiring port is arranged along the longitudinal axis of the housing. The symmetry axis of one of the three stator coils coincides with the longitudinal axis, and the symmetry axes of the other two stator coils are arranged at an angle of 60° with the longitudinal axis. One of the stator coils can make full use of the space at the wiring port of the housing, so that the size utilized by this stator coil coincides with the interface, while the other two stator coils coincide with the space required by other components inside the housing. This arrangement can make full use of the space inside the housing and reduce the overall volume of the damper actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of a damper actuator provided by an embodiment of the present utility model;

[0027] Figure 2 is a schematic structural diagram of the damper actuator with the lower housing hidden according to an embodiment of the present utility model;

[0028] Figure 3 is a schematic structural diagram of the damper actuator with the upper housing hidden according to an embodiment of the present utility model;

[0029] Figure 4 is an exploded view of the stator in the damper actuator provided by an embodiment of the present utility model;

[0030] Figure 5 is a schematic structural diagram of the damper actuator with the upper housing hidden according to an embodiment of the present utility model;

[0031] Figure 6 It is a schematic structural diagram of a shrapnel and an elastic strip in a damper actuator provided by an embodiment of the present invention;

[0032] Figure 7 It is a cross-sectional view of a rotor in a damper actuator provided by an embodiment of the present invention;

[0033] Figure 8 It is a cross-sectional view of a partial structure of a damper actuator provided by an embodiment of the present invention;

[0034] Figure 9 It is a schematic structural diagram of a damper actuator after hiding the upper housing and the output assembly provided by an embodiment of the present invention.

[0035] Description of reference numerals:

[0036] Housing 1;

[0037] Wiring port 1a;

[0038] Upper housing 11;

[0039] First limiting groove 11a;

[0040] Lower housing 12;

[0041] Second limiting groove 12a;

[0042] Fixing groove 12b;

[0043] Bump 13;

[0044] Support rib 14;

[0045] Electric motor 2;

[0046] Rotor 21;

[0047] Rotating shaft 211;

[0048] Magnetic ring 212;

[0049] Bearing 213;

[0050] Shrapnel 214;

[0051] Elastic strip 215;

[0052] Rotor gear 216;

[0053] Fixing ring 217;

[0054] Stator 22;

[0055] Stator coil 221;

[0056] Outer iron core 222;

[0057] Rotor slot 22a;

[0058] Mounting groove 22b;

[0059] Inner iron core 223;

[0060] Circuit board 24;

[0061] Output assembly 3;

[0062] Output shaft 31;

[0063] Output gear 32;

[0064] Longitudinal axis L. Detailed implementation manner

[0065] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0066] In order to solve the technical problem that the overall size of the air door actuator increases due to the arrangement method of the winding magnetic poles in the prior art, the present utility model provides an air door actuator, which can avoid the influence of the arrangement method of the winding magnetic poles on the volume of the air door actuator.

[0067] It should be noted that the air door actuator described in the present utility model is used for but not limited to automotive air conditioners, etc. For the convenience of description, in the present utility model, only the case where the air door actuator is applied to an automotive air conditioner is taken as an example for description, and the principle of the air door actuator applied to other types of devices is substantially the same as that applied to an automotive air conditioner, and will not be elaborated herein one by one.

[0068] Please refer to Figure 2 and Figure 3 , Figure 2 and Figure 3 are both schematic structural diagrams of the air door actuator with the housing of a hidden part in an embodiment of the present utility model. An air door actuator includes a housing 1 and an electric motor 2. The housing 1 has a longitudinal axis L and a wiring port 1a is formed along the longitudinal axis L. The electric motor 2 includes a rotor 21 and a stator 22. The rotor 21 is rotatably connected to the housing 1. The stator 22 includes three stator coils 221. The three stator coils 221 are circumferentially spaced along the rotor 21 and are all connected to the housing 1. The symmetry axis of one of the three stator coils 221 coincides with the longitudinal axis L, and the symmetry axes of the other two stator coils 221 are arranged at an angle of 60° with the longitudinal axis L.

[0069] The housing 1 itself has ports for wiring. The wiring port 1a is arranged along the longitudinal axis L of the housing 1. The axis of symmetry of one of the three stator coils 221 coincides with the longitudinal axis L, and the axes of symmetry of the other two stator coils 221 are arranged at an angle of 60° with the longitudinal axis L. One of the stator coils 221 can make full use of the space at the wiring port 1a of the housing 1, so that the size utilized by this stator coil 221 coincides with that of the interface, while the other two stator coils 221 coincide with the space required by other components inside the housing 1. This arrangement can make full use of the space inside the housing 1 and reduce the overall volume of the damper actuator.

[0070] It should be understood that the stator coil 221 can be directly fixed inside the housing 1 or indirectly connected to the housing 1 through other structures. As Figure 4 shown, in one of the embodiments, the stator 22 further includes an outer iron core 222 and three inner iron cores 223. The outer iron core 222 is formed with a rotor slot 22a and three mounting slots 22b. The outer iron core 222 is sleeved on the rotor 21 through the rotor slot 22a, and the three mounting slots 22b are circumferentially spaced along the rotor 21; the three inner iron cores 223 are respectively placed inside the three mounting slots 22b; the three stator coils 221 are respectively wound around the three inner iron cores 223.

[0071] By providing the outer iron core 222 and the inner iron cores 223, the connection between the three stator coils 221 and the housing 1 is realized; when the stator coil 221 is energized, the outer iron core 222 and the inner iron cores 223 can ensure the effective transmission of magnetic flux; by providing the rotor slot 22a inside the outer iron core 222, the installation of the outer iron core 222 relative to the rotor 21 is realized, and by providing three mounting slots 22b inside the outer iron core 222, the three stator coils 221 are accommodated through the three mounting slots 22b. Moreover, the cooperation of the sizes of the outer iron core 222, the inner iron cores 223 and the three stator coils 221 can reduce the volume of the iron core occupied by the damper actuator.

[0072] As Figure 4 shown, in one of the embodiments, the outer iron core 222 and the three inner iron cores 223 are integrally formed, and the outer iron core 222 and the three inner iron cores 223 are both formed by laminating silicon steel sheets.

[0073] The integral formation of the outer iron core 222 and the three inner iron cores 223 is more robust in structure and can better resist the mechanical stress generated during the operation of the electric motor 2, thereby improving the reliability of the electric motor 2; the iron core formed by laminating silicon steel sheets has excellent magnetic properties, can effectively conduct magnetic flux, optimize the magnetic circuit design of the electric motor 2, and thus improve the performance and efficiency of the electric motor 2.

[0074] It should be understood that the housing 1 can be integrally formed or formed by splicing multiple structures, such as Figure 1As shown, in one embodiment, the housing 1 includes an upper housing 11 and a lower housing 12. The upper housing 11 and the lower housing 12 are detachably connected to each other and enclose to form a receiving cavity. The rotor 21 and the stator 22 are disposed inside the receiving cavity.

[0075] The detachable connection between the upper housing 11 and the lower housing 12 makes it easy to access the internal structure by simply disassembling a part of the housing 1 when maintenance or replacement of internal components is needed, which makes the assembly and maintenance of the electric motor 2 more convenient.

[0076] It should be understood that the upper housing 11 and the lower housing 12 can be detachably connected by means of snaps, bolts, screws, etc.

[0077] It should be understood that the wiring port 1a is enclosed between the upper housing 11 and the lower housing 12.

[0078] In one embodiment, the upper housing 11 is formed with a first limiting groove 11a, and the lower housing 12 is formed with a second limiting groove 12a. The rotor 21 includes a rotating shaft 211 and a magnetic ring 212. One end of the rotating shaft 211 is rotatably inserted into the first limiting groove 11a, and the other end is rotatably inserted into the second limiting groove 12a. The magnetic ring 212 is sleeved on the rotating shaft 211.

[0079] By providing the first limiting groove 11a and the second limiting groove 12a, both ends of the rotating shaft 211 are respectively inserted into the first limiting groove 11a and the second limiting groove 12a, realizing the limitation of both ends of the rotating shaft 211, and being able to provide stable support for both ends of the rotating shaft 211. When the stator coil 221 is energized, the stator coil 221 drives the magnetic ring 212 to rotate, and the magnetic ring 212 drives the rotating shaft 211 to rotate.

[0080] As Figure 7 and Figure 8 shown, in one embodiment, the rotor 21 further includes a bearing 213. The bearing 213 is sleeved on the rotating shaft 211 and is fitted and disposed inside the second limiting groove 12a.

[0081] By providing the bearing 213, the bearing 213 can position the radial direction of the rotating shaft 211 and prevent the rotating shaft 211 from jumping radially during the rotation process.

[0082] As Figure 5 and Figure 8 shown, in one embodiment, the rotor 21 further includes a shrapnel 214. One end of the shrapnel 214 is rotatably abutted against the rotating shaft 211, and the other end is connected to the upper housing 11.

[0083] By providing the spring piece 214 , the spring piece 214 can provide an elastic limiting force to limit the axial runout of the rotating shaft 211 , and through the joint action with the bearing 213 , the axial and radial runout of the rotating shaft 211 is limited, so that the rotating shaft 211 can rotate smoothly.

[0084] like Figure 6 , Figure 7 and Figure 8 As shown, in one of the embodiments, a protrusion 13 is formed on the inner wall of the upper shell 11, and the protrusion 13 is provided with a first limiting groove 11a relative to the lower shell 12; a spring sheet 214 is provided with a through hole relative to the protrusion 13, and a plurality of elastic strips 215 are formed in the through hole of the spring sheet 214, and the elastic strip 215 is arranged at an angle, and one end of the elastic strip 215 is connected to the spring sheet 214, and the other end gradually approaches the protrusion 13 in a direction away from the upper shell 11.

[0085] By providing the protrusion 13, the spring sheet 214 can be sleeved on the protrusion 13 through the through hole, which can prevent the spring sheet 214 from sliding away from the protrusion 13 along the radial direction of the through hole. By providing a plurality of elastic strips 215 in the through hole, the other ends of the plurality of elastic strips 215 gradually approach the protrusion 13. When the spring sheet 214 moves relative to the protrusion 13 along the radial direction of the through hole, the elastic strip 215 abuts against the protrusion 13, which can limit the sliding of the spring sheet 214 relative to the protrusion 13 and provide elastic force for the spring sheet 214 to return to its original position after sliding, so that the through hole of the spring sheet 214 tends to be coaxial with the protrusion 13.

[0086] like Figure 7 and Figure 8 As shown, in one embodiment, the rotor 21 also includes a rotor gear 216, which is fixedly sleeved on the rotating shaft 211; the upper shell 11 is provided with a first output hole, and the lower shell 12 is provided with a second output hole relative to the first output hole; the damper actuator also includes an output component 3, the output component 3 includes an output shaft 31 and an output gear 32, one end of the output shaft 31 can be rotatably inserted in the first output hole, and the other end can be rotatably inserted in the second output hole, the output gear 32 is fixedly sleeved on the output shaft 31, and meshes with the rotor gear 216, and the output gear 32 can be rotatably built into the accommodating cavity.

[0087] By setting the rotor gear 216, the rotor gear 216 is connected to the rotating shaft 211. When the rotating shaft 211 rotates, the rotor gear 216 is driven to rotate. The rotating rotor gear 216 drives the output gear 32 to rotate. The output gear 32 drives the output shaft 31 to rotate. The output shaft 31 drives the blades of the air outlet of the air conditioner to rotate to adjust the air outlet direction of the automobile air outlet.

[0088] It should be understood that the output gear 32 may be directly meshed with the rotor gear 216 or may be indirectly meshed with the rotor gear 216 via a gear train.

[0089] It should be understood that the spring piece 214 can directly abut the rotating shaft 211. Figure 8 As shown, in one embodiment, the spring piece 214 is sleeved on the rotating shaft 211 and abuts against the rotor gear 216 , and abuts against the rotating shaft 211 through the rotor gear 216 .

[0090] like Figure 7 and Figure 8 As shown, in one embodiment, the rotor 21 also includes a fixing ring 217, which is fixedly sleeved on the rotating shaft 211, and an annular groove is formed on the fixing ring 217, the fixing ring 217 and the rotor gear 216 are integrally injection molded, the magnetic ring 212 is fixedly embedded in the annular groove, the outer iron core 222 is sleeved on the magnetic ring 212 through the rotor groove 22a, and the outer iron core 222 is fixed to the lower shell 12.

[0091] By integrally injection molding the rotor gear 216 and the fixing ring 217 , the number of parts can be reduced. Moreover, when the magnetic ring 212 is embedded in the injection-molded fixing ring 217 , the magnetic ring 212 can be fixed to prevent the magnetic ring 212 from moving radially or axially, thereby enhancing the connection strength between the magnetic ring 212 and the fixing ring 217 .

[0092] like Figure 9 As shown, in one embodiment, the lower shell 12 is formed with a fixing groove 12b, and a plurality of support ribs 14 are formed in the fixing groove 12b. The plurality of support ribs 14 are distributed at intervals along the circumference of the first output hole. One end of the output gear 32 can be rotatably embedded in the fixing groove 12b and abut against the plurality of support ribs 14.

[0093] By setting a fixed groove 12b, the fixed groove 12b can accommodate the rotating output gear 32, and by setting a plurality of supporting ribs 14, when the rotating gear rotates, it rotates and abuts against the supporting ribs 14, and abuts against the lower shell 12 through the supporting ribs 14, thereby preventing the end face of the rotating gear from directly abutting against the lower shell 12, reducing the contact area during rotation, and reducing the rotational friction of the rotating gear.

[0094] like Figure 5 As shown, in one embodiment, the electric motor 2 also includes a circuit board 24, the circuit board 24 is built into the accommodating groove, and the circuit board 24 is provided with a fixing hole relative to the rotor gear 216, the circuit board 24 is sleeved on the rotor gear 216 through the fixing hole, the circuit board 24 is electrically connected to each stator coil 221, and the wiring terminals of the circuit board 24 extend into the wiring port 1a; the outer shape of the circuit board 24 is substantially the same as the outer shape of the outer iron core 222.

[0095] By providing the circuit board 24, the circuit board 24 can control the electrical signals applied to each stator coil 221 to control the rotation of the magnetic ring 212 and the rotating shaft 211 through the stator coil 221; by extending the connection terminals of the circuit board 24 into the connection port 1a of the housing 1, power can be supplied to the circuit board 24 through the connection terminals at the connection port 1a; by making the outer shape of the circuit board 24 substantially the same as that of the outer iron core 222, the increase in the volume of the damper actuator caused by the circuit board 24 can be avoided.

[0096] The specific embodiments of the present invention described above do not limit the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A damper actuator, characterized in that: include: A housing having a longitudinal axis and a wiring port formed along the longitudinal axis; and An electric motor comprises a rotor and a stator, wherein the rotor is rotatably connected to the housing, and the stator comprises three stator coils, which are spaced apart along the circumference of the rotor and are all connected to the housing, wherein the symmetry axis of one of the three stator coils coincides with the longitudinal axis, and the symmetry axes of the other two stator coils are arranged at an angle of 60° to the longitudinal axis.

2. The damper actuator according to claim 1, characterized in that: The stator further comprises an outer iron core and three inner iron cores, the outer iron core is formed with a rotor slot and three mounting slots, the outer iron core is sleeved on the rotor through the rotor slot, the three mounting slots are distributed at intervals along the circumference of the rotor; the three inner iron cores are respectively built into the three mounting slots; The three stator coils are respectively wound around the three inner iron cores.

3. The damper actuator according to claim 2, characterized in that: The outer iron core and the three inner iron cores are integrally formed, and the outer iron core and the three inner iron cores are all formed by stacking silicon steel sheets.

4. The damper actuator according to claim 1, characterized in that: The housing comprises an upper housing and a lower housing, wherein the upper housing and the lower housing are detachably connected and enclose a receiving cavity; The rotor and the stator are built in the accommodating cavity.

5. The damper actuator according to claim 4, characterized in that: The upper shell is formed with a first limiting groove, and the lower shell is formed with a second limiting groove; The rotor comprises a rotating shaft and a magnetic ring. One end of the rotating shaft can be rotatably inserted in the first limiting groove, and the other end can be rotatably inserted in the second limiting groove. The magnetic ring is sleeved on the rotating shaft.

6. The damper actuator according to claim 5, characterized in that: The rotor further includes a bearing, which is sleeved on the rotating shaft and fitted into the second limiting groove.

7. The damper actuator according to claim 6, characterized in that: The rotor further comprises an elastic sheet, one end of which is rotatably abutted against the rotating shaft, and the other end of which is connected to the upper shell.

8. The damper actuator according to claim 7, characterized in that: A convex block is formed on the inner wall of the upper shell, and the convex block is provided with the first limiting groove relative to the lower shell; The spring sheet is provided with a through hole relative to the protrusion, and a plurality of elastic strips are formed in the through hole of the spring sheet. The elastic strips are arranged obliquely, and one end thereof is connected to the spring sheet, and the other end thereof gradually approaches the protrusion in a direction away from the upper shell.

9. The damper actuator according to claim 5, characterized in that: The rotor further comprises a rotor gear, and the rotor gear is fixedly sleeved on the rotating shaft; The upper shell is provided with a first output hole, and the lower shell is provided with a second output hole opposite to the first output hole; The damper actuator also includes an output component, which includes an output shaft and an output gear. One end of the output shaft can be rotatably inserted in the first output hole, and the other end can be rotatably inserted in the second output hole. The output gear is fixedly sleeved on the output shaft and meshes with the rotor gear. The output gear can be rotatably built into the accommodating cavity.

10. The damper actuator according to claim 9, characterized in that: The lower shell is formed with a fixing groove, and a plurality of supporting ribs are formed in the fixing groove. The plurality of supporting ribs are distributed at intervals along the circumference of the first output hole. One end of the output gear is rotatably embedded in the fixing groove and abuts against the plurality of supporting ribs.

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