Compact air door actuator

Abstract

The utility model relates to the technical field of air door actuators, and discloses a compact type air door actuator which comprises a shell, a driving assembly and a transmission assembly, the driving assembly comprises a rotor and a plurality of stator coils, the rotor is rotationally connected with the shell, and the stator coils are connected with the shell and distributed at intervals in the circumferential direction of the rotor; the transmission assembly comprises a rotor gear, a rotating shaft and a transmission gear, the rotor gear is connected with the rotor, the rotating shaft is arranged between two adjacent stator coils and is rotationally connected with the shell, and the transmission gear is connected with the rotating shaft and is meshed with the rotor gear.

Description

Technical Field

[0001] The utility model relates to the technical field of damper actuators, and in particular to a compact damper actuator. Background Technology

[0002] The damper actuator, as an accessory of the air conditioner, is one of the essential parts of modern cars. Its main function is to change the wind direction of the air outlet in the car by adjusting the position and angle of different dampers of the car air conditioner according to the different wind direction requirements of the passengers in the car. It is used when the car is cooled or heated up, mainly to blow the appropriate wind speed and airflow with appropriate temperature to the required area to meet the requirements of temperature airflow.

[0003] Announcement No. CN218257653U discloses a damper actuator, including a housing, a drive motor and a reduction gear set, the housing having an installation cavity, the housing having an output shaft hole connected to the installation cavity along the thickness direction of the installation cavity; the drive motor is arranged in the installation cavity, the drive motor comprises a shell and a drive shaft with one end extending out of the shell, the end of the drive shaft extending out of the shell is provided with a drive gear, and is arranged toward one side of the installation cavity in the thickness direction, the shell is provided with a mounting shaft hole along the thickness direction of the installation cavity; the reduction gear set comprises a first reduction gear meshing with the drive gear and an output gear drivingly connected to the first reduction gear, the rotating shaft of the first reduction gear is passed through the installation shaft hole, and the rotating shaft of the output gear is passed through the output shaft hole.

[0004] In the above-mentioned damper actuator, the rotating shaft of the first reduction gear passes through the mounting shaft hole on the outer wall of the driving motor. The larger the stator diameter, the higher the output torque of the damper actuator and the higher the load capacity of the damper actuator. However, since there is a stator coil in the driving motor, when the diameter of the stator increases, the rotating shaft of the first reduction gear needs to move away from the stator coil, which increases the meshing center distance between the gear fixed on the rotating shaft of the driving motor and the first reduction gear, increasing the overall size of the equipment and causing the damper actuator to be bloated. Contents of utility model

[0005] The purpose of the utility model is to overcome the above technical deficiencies and propose a compact damper actuator to solve the technical problem in the prior art that increasing the size of the stator will increase the meshing center distance between the gear fixed on the rotating shaft of the drive motor and the first reduction gear.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a compact damper actuator, comprising:

[0008] Shell;

[0009] A driving assembly, including a rotor and a plurality of stator coils. The rotor is rotatably connected to the housing, and the plurality of stator coils are connected to the housing and are circumferentially spaced apart along the rotor; and

[0010] A transmission assembly, including a rotor gear, a rotating shaft, and a transmission gear. The rotor gear is connected to the rotor, the rotating shaft is disposed between two adjacent stator coils and is rotatably connected to the housing, and the transmission gear is connected to the rotating shaft and meshes with the rotor gear.

[0011] In one embodiment, the driving assembly further includes a fixed skeleton, the fixed skeleton is connected to the housing, and the plurality of stator coils are wound around the fixed skeleton;

[0012] The end of the transmission gear is rotatably abutted against the fixed skeleton.

[0013] In one embodiment, a boss is formed at one end of the fixed skeleton;

[0014] The end of the transmission gear is rotatably abutted against the boss and abuts against the fixed skeleton through the boss.

[0015] In one embodiment, the rotor includes a central shaft, a fixing structure, and a magnetic ring. The central shaft is rotatably connected to the housing, the fixing structure is fixedly sleeved on the central shaft, and the fixing structure is formed with an annular groove, the annular groove is arranged around the central shaft, and the magnetic ring is arranged in the annular groove.

[0016] In one embodiment, the fixing structure is integrally formed.

[0017] In one embodiment, an installation groove is formed in the housing;

[0018] The central shaft is inserted into the installation groove;

[0019] The rotor further includes a bearing, and the bearing is sleeved on the central shaft and is fitted and disposed in the installation groove.

[0020] In one embodiment, the rotor further includes a shrapnel. One end of the shrapnel is rotatably sleeved on the central shaft and abuts against the rotor gear, and the other end of the shrapnel abuts against the inner wall of the housing. The shrapnel is used to provide an axial limiting force for the central shaft.

[0021] In one embodiment, the compact air damper actuator further includes a circuit board. The circuit board is disposed at one end of the fixed skeleton and is connected to the housing, and the circuit board is electrically connected to each stator coil.

[0022] In one embodiment, the circuit board is provided with a fixing hole opposite to the rotor gear and an avoidance groove opposite to the transmission gear;

[0023] The circuit board is sleeved on the rotor gear through the fixing hole.

[0024] In one embodiment, the transmission assembly further includes an output shaft and an output gear. The output shaft is rotatably connected to the housing. The output gear is connected to the output shaft and is in transmission connection with the transmission gear.

[0025] Compared with the prior art, the compact damper actuator provided by the present utility model is provided with a plurality of stator coils, and the plurality of stator coils are spaced apart along the circumferential direction of the rotor. When the diameter of the stator formed by combining the plurality of stator coils increases, it will not interfere with the rotating shaft located between the adjacent stator coils, that is, the increase in the stator diameter will not cause an increase in the meshing center distance between the transmission gear and the rotor gear; while increasing the stator diameter to improve the output torque of the damper actuator, the size of the damper actuator will not be increased, the overall volume is reduced, and the installation occupied space is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 FIG. is a schematic structural diagram of a compact damper actuator provided by an embodiment of the present utility model with a part of the housing hidden;

[0027] Figure 2 FIG. is a schematic structural diagram of a compact damper actuator provided by an embodiment of the present utility model with a part of the housing hidden;

[0028] Figure 3 FIG. is an exploded view of a stator coil and a fixing skeleton in a compact damper actuator provided by an embodiment of the present utility model;

[0029] Figure 4 FIG. is an exploded view of a rotor in a compact damper actuator provided by an embodiment of the present utility model;

[0030] Figure 5 FIG. is a sectional view of a compact damper actuator provided by an embodiment of the present utility model.

[0031] DESCRIPTION OF THE REFERENCE NUMERALS:

[0032] Housing 1;

[0033] Drive assembly 2;

[0034] Rotor 21;

[0035] Central shaft 211;

[0036] Fixing structure 212;

[0037] Magnetic ring 213;

[0038] Bearing 214;

[0039] Elastic piece 215;

[0040] Stator coil 22;

[0041] Fixed skeleton 23;

[0042] Boss 231;

[0043] Fixed ring 232;

[0044] Winding bracket 233;

[0045] Drive assembly 3;

[0046] Rotor gear 31;

[0047] Rotating shaft 32;

[0048] Drive gear 33;

[0049] Output shaft 34;

[0050] Output gear 35;

[0051] Circuit board 4. Specific implementation manner

[0052] 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.

[0053] In order to solve the technical problem in the prior art that when the size of the stator is increased, the meshing center distance between the gear fixed on the rotating shaft of the drive motor and the first reduction gear will increase, the present utility model provides a compact damper actuator, which can increase the stator diameter without increasing the meshing center distance between the gear fixed on the rotating shaft of the drive motor and the first reduction gear.

[0054] It should be noted that the compact damper actuator in the present utility model is used for but not limited to air-conditioning dampers, etc. For the convenience of description, in the present utility model, only the application of the compact damper actuator to air-conditioning damper adjustment is taken as an example for description, and the principle of the compact damper actuator applied to other types of equipment is substantially the same as that applied to air-conditioning damper adjustment, and will not be elaborated herein one by one.

[0055] Please refer to Figure 1 , Figure 1This is a schematic structural diagram of a compact damper actuator with the hidden part of the housing in an embodiment of the present invention. A compact damper actuator includes a housing 1, a driving assembly 2 and a transmission assembly 3. The driving assembly 2 includes a rotor 21 and a plurality of stator coils 22. The rotor 21 is rotatably connected to the housing 1, and the plurality of stator coils 22 are connected to the housing 1 and are circumferentially spaced along the rotor 21. The transmission assembly 3 includes a rotor gear 31, a rotating shaft 32 and a transmission gear 33. The rotor gear 31 is connected to the rotor 21. The rotating shaft 32 is arranged between two adjacent stator coils 22 and is rotatably connected to the housing 1. The transmission gear 33 is connected to the rotating shaft 32 and meshes with the rotor gear 31.

[0056] In the present invention, by providing a plurality of stator coils 22 and the plurality of stator coils 22 being circumferentially spaced along the rotor 21, when the stator diameter formed by the combination of the plurality of stator coils 22 increases, it will not interfere with the rotating shaft 32 located between adjacent stator coils 22, that is, the increase of the stator diameter will not cause the meshing center distance between the transmission gear 33 and the rotor gear 31 to increase. While increasing the stator diameter to improve the output torque of the damper actuator, the size of the damper actuator will not be increased, the overall volume is reduced, and the installation space occupied is reduced.

[0057] It should be understood that the plurality of stator coils 22 can be directly fixed to the inner wall of the housing 1 or indirectly fixed to the housing 1 through other components. As Figure 2 shown, in one of the embodiments, the driving assembly 2 further includes a fixing skeleton 23. The fixing skeleton 23 is connected to the housing 1, and the plurality of stator coils 22 are wound around the fixing skeleton 23. The end of the transmission gear 33 can rotatably abut against the fixing skeleton 23.

[0058] By providing the fixing skeleton 23, the fixing skeleton 23 can fix the plurality of stator coils 22 to the housing 1.

[0059] To avoid the gears directly rotating and rubbing against the stator coils 22, as Figure 2 shown, in one of the embodiments, one end of the fixing skeleton 23 is formed with a boss 231. The end of the transmission gear 33 can rotatably abut against the boss 231 and abut against the fixing skeleton 23 through the boss 231.

[0060] By forming a boss 231 at one end of the fixing skeleton 23, when the transmission gear 33 rotates driven by the rotating gear, the transmission gear 33 rotates and abuts against the boss 231. The boss 231 can support the bottom of the transmission gear 33 and make the transmission gear 33 higher than the stator coils 22, avoiding the transmission gear 33 rotating and rubbing against the stator coils 22.

[0061] It should be understood that the fixing skeleton 23 can be various structures capable of fixing the stator coils 22. As Figure 3As shown, in one of the embodiments, the fixed skeleton 23 includes a fixed ring 232 and a plurality of winding brackets 233 disposed within the fixed ring 232. The plurality of winding brackets 233 are built into the fixed ring 232 and are connected to the fixed ring 232. The stator coils 22 are arranged in one-to-one correspondence with the winding brackets 233, and the stator coils 22 are wound around the winding brackets 233. It should be understood that the boss 231 is formed by the outer protrusion of the end of the fixed ring 232.

[0062] By providing a plurality of winding brackets 233, a plurality of stator coils 22 arranged at intervals can be fixed.

[0063] As Figure 4 and Figure 5 As shown, in one of the embodiments, the rotor 21 includes a central shaft 211, a fixing structure 212, and a magnetic ring 213. The central shaft 211 is rotatably connected to the housing 1. The fixing structure 212 is fixedly sleeved on the central shaft 211, and the fixing structure 212 is formed with an annular groove that surrounds the central shaft 211. The magnetic ring 213 is disposed in the annular groove. Among them, the rotor gear 31 is fixedly sleeved on the central shaft 211.

[0064] The central shaft 211 is rotatably connected to the housing 1. The fixing structure 212 fixes the magnetic ring 213 to the central shaft 211. When the stator coil 22 is energized, it drives the magnetic ring 213 to rotate. The magnetic ring 213 drives the fixing structure 212 and the central shaft 211 to rotate, and the central shaft 211 drives the rotor gear 31 to rotate.

[0065] It should be understood that the fixing structure 212 can be an integrally formed structure or formed by splicing a plurality of components. In one of the embodiments, the fixing structure 212 is integrally formed.

[0066] By setting the fixing structure 212 to be integrally formed, compared with forming the fixing structure 212 by splicing, the subsequent assembly process is simple and efficient, and the firmness of the formed overall structure is high, and the overall balance performance is also significantly improved. More specifically, by the injection molding bosses 231 respectively formed at the two shaft ends of the magnetic ring 213, the injection molding bosses 231 are used to fix the body of the magnetic ring 213, so that the body of the magnetic ring 213 will not generate radial or axial offset; moreover, the connection strength between the body of the magnetic ring 213 and the injection molded body can be improved.

[0067] It should be understood that the rotation between the central shaft 211 and the housing 1 can be achieved by means of shaft hole fit or by means of bearings. As Figure 5 As shown, in one of the embodiments, an installation groove is formed in the housing 1; the central shaft 211 is inserted into the installation groove; the rotor 21 further includes a bearing 214, and the bearing 214 is sleeved on the central shaft 211 and is fitted and built into the installation groove.

[0068] For the drive component 2, the fitting requirement between its central shaft 211 and the perforation of the rotor gear 31 is relatively high. Due to the existence of machining errors, it is difficult to ensure that the dimensions are exactly matched between the central shaft 211 and the perforation of the rotor gear 31. When the central shaft 211 and the perforation of the rotor gear 31 are in interference fit, the rotor 21 is easily stuck to the central shaft 211 and thus cannot rotate; when the central shaft 211 and the perforation of the rotor gear 31 are in clearance fit, the rotor gear 31 runs unstably on the central shaft 211, generating a large noise, which will affect the use experience. Therefore, in this embodiment, by setting the bearing 214, the bearing 214 is embedded in the installation groove by interference fit, the central shaft 211, the rotor gear 31 and the magnetic ring 213 are integrally injection-molded, and the clearance between the central shaft 211 and the bearing 214 is less than 0.01 mm, which can limit the radial runout of the rotor 21 assembly.

[0069] Since the rotating gear may drive the central shaft 211 to axially jump during rotation, therefore, as Figure 5 shown, in one of the embodiments, the rotor 21 further includes a shrapnel 215. One end of the shrapnel 215 is rotatably sleeved on the central shaft 211 and abuts against the rotor gear 31, and the other end of the shrapnel 215 abuts against the inner wall of the housing 1. The shrapnel 215 is used to provide an axial limiting force for the central shaft 211.

[0070] By setting the shrapnel 215, the shrapnel 215 can provide an axial limiting force for the central shaft 211 to prevent the central shaft 211 from axially jumping.

[0071] As Figure 1 shown, in one of the embodiments, the compact damper actuator further includes a circuit board 4. The circuit board 4 is arranged at one end of the fixed skeleton 23 and is connected to the housing 1. The circuit board 4 is electrically connected to each stator coil 22.

[0072] By setting the circuit board 4, the circuit board 4 can supply power to each stator coil 22, so that the stator coil 22 drives the rotor 21 to rotate under the drive of an electrical signal.

[0073] As Figure 1 shown, in one of the embodiments, the circuit board 4 is provided with a fixing hole opposite to the rotor gear 31 and a relief groove opposite to the transmission gear 33; the circuit board 4 is sleeved on the rotor gear 31 through the fixing hole.

[0074] By providing a fixing hole on the circuit board 4, when the circuit board 4 approaches the rotor gear 31, the circuit board 4 is sleeved on the rotor gear 31 through the fixing hole, and the circuit board 4 can avoid the rotating transmission gear 33 through the relief groove. The overall structure is more compact, the overall volume is reduced, and the space occupied by the installation of the damper actuator is reduced.

[0075] As Figure 1As shown, in one of the embodiments, the transmission assembly 3 further includes an output shaft 34 and an output gear 35. The output shaft 34 is rotatably connected to the housing 1. The output gear 35 is connected to the output shaft 34 and is in transmission connection with the transmission gear 33.

[0076] By providing the output shaft 34 and the output gear 35, when the rotor 21 rotates, it drives the rotor gear 31 to rotate. The rotating gear drives the transmission gear 33 and the rotating shaft 32 to rotate. The transmission gear 33 is in transmission connection with the output gear 35 and drives the output gear 35 to rotate. The rotation of the output gear 35 drives the output shaft 34 to rotate, and the rotation of the output shaft 34 drives the blades of the air outlet of the air conditioner to rotate.

[0077] It should be understood that the output gear 35 and the transmission gear 33 can be directly meshed or can be in transmission connection through a plurality of meshing gears.

[0078] The specific embodiments of the present invention described above do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A compact damper actuator, characterized in that: include: case; A driving assembly, comprising a rotor and a plurality of stator coils, wherein the rotor is rotatably connected to the housing, and the plurality of stator coils are connected to the housing and are spaced apart along the circumference of the rotor; and The transmission assembly includes a rotor gear, a rotating shaft, and a transmission gear. The rotor gear is connected to the rotor. The rotating shaft is arranged between two adjacent stator coils and is rotationally connected to the housing. The transmission gear is connected to the rotating shaft and meshes with the rotor gear.

2. The compact damper actuator according to claim 1, characterized in that: The driving assembly further comprises a fixed frame, the fixed frame is connected to the housing, and a plurality of stator coils are wound around the fixed frame; The end of the transmission gear can be rotatably abutted against the fixed frame.

3. The compact damper actuator according to claim 2, characterized in that: A boss is formed at one end of the fixed frame; The end of the transmission gear can be rotatably abutted against the boss, and abutted against the fixed frame through the boss.

4. The compact damper actuator according to claim 1, characterized in that: The rotor includes a central shaft, a fixed structure and a magnetic ring. The central shaft is rotatably connected to the shell. The fixed structure is fixedly sleeved on the central shaft, and the fixed structure is formed with an annular groove. The annular groove is arranged around the central shaft, and the magnetic ring is arranged in the annular groove.

5. The compact damper actuator according to claim 4, characterized in that: The fixing structure is integrally formed.

6. The compact damper actuator according to claim 4, characterized in that: A mounting groove is formed in the housing; The central axis is inserted into the mounting groove; The rotor further includes a bearing, which is sleeved on the central shaft and fitted into the mounting groove.

7. The compact damper actuator according to claim 6, characterized in that: The rotor further comprises an elastic sheet, one end of which is rotatably sleeved on the central shaft and abuts against the rotor gear, and the other end of which abuts against the inner wall of the shell, and the elastic sheet is used to provide an axial limiting force for the central shaft.

8. The compact damper actuator according to claim 2, characterized in that: It also includes a circuit board, which is arranged at one end of the fixed frame and connected to the shell, and the circuit board is electrically connected to each of the stator coils.

9. The compact damper actuator according to claim 8, characterized in that: The circuit board is provided with a fixing hole relative to the rotor gear, and is provided with an avoidance groove relative to the transmission gear; The circuit board is sleeved on the rotor gear through the fixing hole.

10. The compact damper actuator according to claim 1, characterized in that: The transmission assembly also includes an output shaft and an output gear. The output shaft is rotatably connected to the housing, and the output gear is connected to the output shaft and is in transmission connection with the transmission gear.

Images