Actuator for active rear spoiler

Abstract

The present invention relates to an actuator for an active rear spoiler (ARS), used to adjust the angle of a wing in the ARS in conjunction with the driving speed of a vehicle. The present invention comprises: a hollow-type output shaft in which a driving shaft for rotatably driving the wing of the ARS is coupled; a housing; a cover coupled to an opening of the housing; a driving motor which is disposed at the rear end portion of the housing and in which a first worm gear is formed on the outer circumference of a rotary shaft extending to the front end portion of a rotor; a reduction gear unit in which a first worm wheel that is gear-coupled to the first worm gear and performs a first deceleration is provided on one side of a transmission shaft and a torque-enhanced rotational output is generated from a second worm gear provided at the other side of the transmission shaft; and a second worm wheel which is gear-coupled to the second worm gear and performs a second deceleration, and is formed on the outer circumference of the hollow-type output shaft to generate a torque-enhanced rotational output from the hollow-type output shaft.

Description

Actuator for active rear spoiler

[0001] The present invention relates to an actuator for an active rear spoiler, and more particularly, to an actuator for an active rear spoiler used to adjust the wing angle of an active rear spoiler in conjunction with the driving speed of a vehicle.

[0002] Normally, when a vehicle travels along a road at high speed, drag, a force that resists in proportion to the vehicle's speed and frontal area, is generated, and lift is applied to the vehicle by the airflow along the body, causing the vehicle to be lifted.

[0003] The upper part of the vehicle is curved, while the lower part is flat. Consequently, the airflow over the upper part of the vehicle accelerates faster than the airflow over the lower part. This creates a pressure difference between the upper and lower parts of the vehicle, generating lift.

[0004] To solve this problem, a rear spoiler was installed on the roof panel or tailgate of a passenger car or RV (SUV), or a fixed spoiler was installed on the top of the trunk lid of a regular passenger car to prevent the rear of the vehicle from being lifted by lift when driving at high speeds.

[0005] However, in the case of a fixed spoiler, the stability and braking power are increased by compensating for the lift force, but when not driving at high speeds, the fixed spoiler may increase the resistance of the air flowing along the outside of the vehicle, which may cause a decrease in driving performance.

[0006] Accordingly, the present invention has been proposed to solve the problems of the above-mentioned prior art, and its purpose is to provide an actuator for an active rear spoiler (ARS) that is used to adjust the wing angle of the active rear spoiler in conjunction with the driving speed of a vehicle.

[0007] Another object of the present invention is to provide an actuator for an active rear spoiler capable of increasing the torque of a final output stage by employing a two-stage worm gear-worm wheel combination structure.

[0008] Another object of the present invention is to provide an actuator for an active rear spoiler with improved assemblability by insert molding or integrally processing a secondary worm wheel into an output shaft.

[0009] In order to achieve the above object, an actuator for an active rear spoiler according to one feature of the present invention is an actuator for an active rear spoiler for adjusting a wing angle of an active rear spoiler, comprising: a hollow output shaft having a drive shaft for rotating the wing of the active rear spoiler coupled therein; a housing having a rectangular cylinder shape and having a through hole formed therein through which a rear end of the hollow output shaft passes; a cover coupled to an open opening of the housing and having a through hole formed therein through which a front end of the hollow output shaft passes; a drive motor disposed at the rear end of the housing and having a first worm gear integrally formed on the outer periphery of a rotational shaft extending to a front end of a rotor; a reduction gear unit having a first worm wheel provided on one side of a power transmission shaft, the first worm wheel being gear-engaged with the first worm gear to perform a first reduction, and a second worm gear provided on the other side of the power transmission shaft to generate a torque-increased rotational output; And it is characterized by including a second worm wheel that is gear-coupled with the second worm gear to perform secondary reduction and is integrally formed on the outer periphery of the hollow output shaft to generate a torque-increased rotational output from the hollow output shaft.

[0010] In this case, the rotational axis of the drive motor and the hollow output shaft are each arranged in the longitudinal direction of the housing, and the power transmission shaft of the reduction gear unit can be arranged in a direction orthogonal to the rotational axis of the drive motor and the hollow output shaft.

[0011] In addition, the driving motor is arranged at the rear of the housing and is configured as an inner rotor type in which a rotor is arranged on the inside of a stator, and the first worm gear can be integrally formed on an extension of a rotational shaft extending forward of the rotor.

[0012] Furthermore, the driving motor further includes a central shaft arranged inside the rotation shaft. The central shaft can be rotatably supported on the front end of the cover and the rear end of the housing, respectively.

[0013] In addition, the reduction gear unit includes a power transmission shaft arranged orthogonally to the rotational axis of the drive motor and the hollow output shaft; a first worm wheel integrally provided on one outer peripheral portion of the power transmission shaft and gear-coupled to the outer peripheral portion of the first worm gear to perform a first reduction; and a second worm gear integrally provided on the other outer peripheral portion of the power transmission shaft and gear-coupled to a second worm wheel integrally formed on the outer peripheral portion of the hollow output shaft to perform a second reduction; and a torque-increased rotational output can be generated by a two-stage reduction from the hollow output shaft.

[0014] Moreover, the torque of the hollow output shaft can be increased by employing a two-stage worm gear-worm wheel coupling structure between the drive motor and the hollow output shaft.

[0015] The above driving motor may include a rotor rotatably coupled to the hollow interior of the housing; and a stator disposed on the outside of the rotor with an air gap and configured to generate a rotating magnetic field to rotate the rotor; wherein the stator may include a stator core having a plurality of teeth each having a “T” shape and a back yoke interconnected with the plurality of teeth to form a magnetic circuit; a bobbin made of an insulating material integrally formed to surround an outer circumferential surface on which coils of each of the plurality of teeth are wound; and a coil wound on the outer circumferential surface of the bobbin.

[0016] In this case, the stator core is formed in the shape of a flat surface on one side and an arcuate surface on the other side to increase the assembling efficiency when assembled inside the housing, and a through hole is formed on each of the corners where the flat surface and the arcuate surface of the stator core meet, into which a fixing screw or fixing bolt is fastened for fixing the stator core to the rear wall of the housing, and a screw assembly projection having a through hole into which a fixing screw or fixing bolt is fastened may be integrally formed in the arcuate surface.

[0017] The actuator for an active rear spoiler according to the present invention may further include first and second printed circuit boards (PCBs) that are electrically connected to each other and are arranged in a divided area at both ends of the drive motor so that a motor drive circuit required to drive the drive motor is mounted thereon.

[0018] In addition, the actuator for an active rear spoiler according to the present invention may further include first and second bearings that rotatably support both ends of the hollow output shaft at the front end of the cover and the rear end of the housing, respectively; and first and second oil chambers that are coupled to the front end of the cover and the rear end of the housing, respectively, to cover the first and second bearings at both ends of the hollow output shaft, thereby realizing an interior formed by the coupling of the housing and the cover as a waterproof structure.

[0019] In this case, the interior formed by the combination of the housing and the cover can realize an IP69 waterproof structure.

[0020] As described above, in the present invention, the wing angle of the active rear spoiler (ARS) can be adjusted in conjunction with the driving speed of the vehicle.

[0021] In addition, conventionally, there are problems such as the structure being too complex due to connection using multiple spur gears, insufficient space for increasing the torque of the driving motor, and low mass productivity, but in the present invention, the torque of the final output stage can be increased by adopting a two-stage worm gear-worm wheel combination structure even in a narrow space.

[0022] Moreover, in the present invention, the assembling ability can be improved by insert molding or integrally processing the secondary worm wheel into the output shaft.

[0023] In the present invention, by adopting a double worm structure in the reduction gear section, power is transmitted with a minimum number of gear engagements, thereby minimizing backlash and increasing the brake torque, thereby increasing the breaking strength.

[0024] In addition, in the present invention, considering that it is difficult to secure a space in which a printed circuit board (PCB) on which a motor drive circuit (driver) necessary for driving a drive motor is mounted is embedded inside the housing, the drive motor can be implemented by first and second printed circuit boards (PCBs) arranged by dividing the area at both ends.

[0025] FIG. 1 is a perspective view of an actuator for an active rear spoiler (ARS) having a hollow output shaft according to a preferred embodiment of the present invention.

[0026] Figure 2 is an exploded perspective view of an actuator having a hollow output shaft according to a preferred embodiment of the present invention.

[0027] Figures 3 to 5 are a front view, a plan view, and a right side view, respectively, of the reduction gear unit.

[0028] Figure 6 is a fully exploded perspective view of an actuator having a hollow output shaft according to a preferred embodiment of the present invention.

[0029] FIGS. 7 to 10 are a perspective view, a side view, a cross-sectional view taken along line AA of FIG. 8, and an exploded perspective view, respectively, showing a stator of a driving motor according to the present invention.

[0030] Figures 11a and 11b are a front view and a BB line cross-sectional view, respectively, of an actuator according to the present invention.

[0031] Figures 12a and 12b are a front view and a cross-sectional view taken along line CC of an actuator according to the present invention, respectively.

[0032] Figures 13a and 13b are cross-sectional views taken along lines DD and EE of Figure 12b, respectively.

[0033] Hereinafter, a preferred embodiment according to the present invention will be described with reference to the attached drawings.

[0034] In this process, the sizes and shapes of components depicted in the drawings may be exaggerated for clarity and convenience. Furthermore, terms specifically defined in consideration of the structure and operation of the present invention may vary depending on the intent or custom of the user or operator. Definitions of these terms should be based on the content throughout this specification.

[0035] An actuator for an active rear spoiler (ARS) having a hollow output shaft according to the present invention controls the wing angle of the active rear spoiler (ARS) in conjunction with the driving speed of the vehicle to optimize aerodynamics so as to prevent the rear of the vehicle from being lifted by lift when the active rear spoiler (ARS) is installed on a roof panel or tailgate of a passenger car or an RV (SUV) at high speed, for example, when the speed exceeds 80 km / h, thereby improving fuel efficiency and driving stability.

[0036] The attached drawing 1 is a perspective view of an actuator for an active rear spoiler (ARS) having a hollow output shaft according to a preferred embodiment of the present invention, drawing 2 is an exploded perspective view of an actuator having a hollow output shaft according to a preferred embodiment of the present invention, drawing 3 to drawing 5 are a front view, a plan view, and a right side view of a reduction gear portion, respectively, and drawing 6 is a completely exploded perspective view of an actuator having a hollow output shaft according to a preferred embodiment of the present invention.

[0037] Referring to FIGS. 1 to 6, an actuator (100) for an active rear spoiler (ARS) having a hollow output shaft according to a preferred embodiment of the present invention comprises: a hollow output shaft (60); a square housing (10) having a through hole formed therein through which a rear end of the hollow output shaft (60) passes; a cover (11) coupled to an open opening of the housing (10) and having a through hole (11a) formed therein through which a front end of the hollow output shaft (60) passes; first and second bearings (71, 72) rotatably supporting the hollow output shaft (60) at the front end of the cover (11) and the rear end of the housing (10), respectively; a drive motor (20) disposed at the rear end of the housing (10) and having a first worm gear (34) integrally formed on the outer periphery of a rotary shaft (32) extending to a front end of a rotor (30); A first worm wheel (53) provided on one side of a power transmission shaft (51) is coupled to the outer periphery of the first worm gear (34), and a reduction gear unit (50) in which a torque-increased rotational output is generated from a second worm gear (55) provided on the other side of the power transmission shaft (51); and a second worm wheel (57) integrally formed on the outer periphery of the hollow output shaft (60) and gear-coupled with the second worm gear (55).

[0038] In this case, when the hollow output shaft (60) is rotatably supported at the front end of the cover (11) and the rear end of the housing (10) by the first and second bearings (71, 72), first and second oil seals (75, 76) are coupled to the front end of the cover (11) and the rear end of the housing (10), respectively, to realize a waterproof structure in the interior formed by the combination of the housing (10) and the cover (11).

[0039] The above first and second oil seals (75, 76) may preferably be installed to have a waterproof structure of IP69 since the actuator (100) for the active rear spoiler (ARS) is installed on the outside of the vehicle.

[0040] The above driving motor (20) generates, for example, a relatively high-speed rotational power, and the reduction gear unit (50) receives the high-speed rotational power and converts it into torque by reducing the rotational speed, thereby generating a reduced rotational power with increased torque.

[0041] The above reduction gear unit (50) receives the high-speed rotational power of the driving motor (20), reduces it, thereby increasing the torque and transmitting it to the hollow output shaft (60).

[0042] The above hollow output shaft (60) is set to have a large diameter to transmit relatively large torque, and the inner portion may have a shaft-joining structure such as a spline joint, screw joint, or a joint structure of a polygonal (e.g., hexagonal) inner portion and a polygonal outer portion so that a slip phenomenon does not occur during power transmission when rotating the wing of the active rear spoiler (ARS).

[0043] The above driving motor (20) is arranged at the rear of the housing (10) and may be configured as an inner rotor type in which a rotor is arranged on the inside of a stator, and includes a rotor (30) that is rotatably coupled to the hollow interior of the housing (10), a stator (40) that is arranged on the inner periphery of the housing (10) with an air gap on the outside of the rotor (30) and generates a rotating magnetic field to rotate the rotor (30), and a first worm gear (34) is integrally formed on the outer periphery of an extension of a rotational shaft (32) extending forward of the rotor (30).

[0044] The rotor (30) has a rotation axis (32) arranged on the outside of a central axis (33), and the magnet (31) arranged on the outer periphery of the rotation axis (32) may be formed of a plurality of N-pole and S-pole split magnet pieces, or a ring-shaped magnet in which the N-pole and S-pole are multi-polarly split and magnetized may be used. The rotor (30) has a structure that does not use a back yoke.

[0045] The above rotor (30) has a rotation axis (32) that extends forward, and a first worm gear (34) is integrally formed on the outer periphery of the extension. In this case, the central axis (33) can be rotatably supported on the front end of the cover (11) and the rear end of the housing (10), respectively.

[0046] As shown in FIGS. 9 and 10, the stator (40) includes a stator core (45) having a plurality of teeth (41) each having a "T" shape and a back yoke (42) interconnected with the plurality of teeth (41) to form a magnetic circuit; a bobbin (44) made of an insulating material integrally formed to surround an outer circumference on which a coil (43) of each of the plurality of teeth is wound; and a coil (43) wound on an outer circumference of the bobbin (44).

[0047] In this case, the bobbin (44) can be formed of upper and lower insulators that are joined at the front and rear to surround the back yoke (42) together with a plurality of teeth (41).

[0048] In addition, the bobbin (44) has a plurality of pairs of winding area guides (44a, 44b) protruding from both ends to limit the winding area of ​​the coil (43).

[0049] The above stator core (45) is formed in the shape of a flat portion (45a) on one side and an arc portion (45b) on the other side to increase the assembling efficiency when assembled inside the housing (10), and a protrusion (45c) for screw assembly can be integrally formed on the arc portion (45b).

[0050] As shown in Fig. 13b, two through holes are formed on both corners where the flat portion (45a) and the circular portion (45b) of the stator core (45) meet, into which two fixing screws or bolts (46) are fastened for fixing the stator core (45) to the rear wall of the housing (10), and a screw assembly protrusion (45c) is formed in the middle portion of the circular portion (45b) into which a fixing screw or bolt (46) is fastened.

[0051] In the present invention, considering that it is difficult to secure a space in which a printed circuit board (PCB) on which a motor drive circuit (driver) required to drive a drive motor is mounted is built inside the housing, the present invention can be implemented by first and second printed circuit boards (PCBs) (13, 80) arranged by dividing the area at both ends of the drive motor (20).

[0052] The first and second printed circuit boards (PCBs) (13, 80) can be electrically connected to each other, and a connector coupling portion (10a) is protruded from the rear end of the housing (10) so that a connector for communication with a control unit provided in the body of the vehicle can be coupled to the second printed circuit board (PCB) (80) disposed at the rear end of the housing.

[0053] The actuator (100) for an active rear spoiler (ARS) according to the present invention may be configured with a BLDC motor having, for example, a 20-pole-18-slot, 12-pole-9-slot or 8-pole-6-slot structure as the driving motor (20).

[0054] In addition, when the coil (43) of the stator (40) of the above driving motor (20) is wound on a plurality of teeth (41), the coil (43) can be wound in a U, V, W three-phase structure, and the other end of the U, V, W three-phase coil (43) can be connected in a Y-connection or star-connection manner.

[0055] In this case, coils (43) are wound on a plurality of teeth (41) in a U, V, W three-phase structure on the first and second printed circuit boards (PCB) (13, 80), and the start terminals of the U, V, W three-phase coils (43) are connected to the inverter output of the motor drive circuit (driver), and the end terminals of the U, V, W three-phase coils (43) are commonly connected to form a neutral point (COM).

[0056] Moreover, the above drive motor (20) is driven in three phases by winding a U, V, W three-phase coil (43) on a tooth (41) in a U, V, W three-phase structure, for example, and can be driven in a 6-step manner using an inverter after receiving a rotor position signal from two or three Hall sensors mounted on a Hall sensor assembly in a radio-wave drive type motor drive circuit.

[0057] As a result, the rotational output of the drive motor (20) is generated from the first worm gear (34) integrally formed on the upper portion of the rotational shaft (32) of the rotor (30). In this case, the first worm gear (34) can be manufactured integrally with the rotational shaft (32).

[0058] The above reduction gear unit (50) includes a power transmission shaft (51), a first worm wheel (53) integrally provided on one outer peripheral portion of the power transmission shaft (51) and coupled to the outer peripheral portion of the first worm gear (34) to perform a first reduction, and a second worm gear (55) integrally provided on the other outer peripheral portion of the power transmission shaft (51) to transmit the first reduced rotational output to a second worm wheel (57) integrally formed on the outer peripheral portion of the hollow output shaft (60), and a second reduction is performed between the second worm gear (55) and the second worm wheel (57) to generate a torque-increased rotational output.

[0059] Both ends of the power transmission shaft (51) are rotatably supported by the third and fourth bearings (73, 74), and the power transmission shaft (51) and the third and fourth bearings (73, 74) are arranged longitudinally on the inner periphery of the housing (10).

[0060] In this case, the hollow output shaft (60) is rotatably supported by first and second bearings (71, 72) installed at the front end of the cover (11) and the rear end of the housing (10), respectively.

[0061] In addition, the second worm wheel (57) formed on the outer periphery of the hollow output shaft (60) can be improved in assembling by insert molding or processing it as an integral part of the output shaft (60).

[0062] The inner portion of the above hollow output shaft (60) may have a shaft-joining structure such as a spline joint, screw joint, or a joint structure of a polygonal (e.g., hexagonal) inner portion and a polygonal outer portion so that a slip phenomenon does not occur when power is transmitted by coupling a drive shaft that rotates the wing of the active rear spoiler (ARS).

[0063] The actuator (100) for an active rear spoiler (ARS) according to the present invention has the drive motor (20) and the hollow output shaft (60) arranged longitudinally inside the housing (10), and the power transmission shaft (51) of the reduction gear unit (50) is arranged orthogonally to the drive motor (20) and the hollow output shaft (60), so that efficient arrangement can be achieved in a limited internal space having a rectangular shape.

[0064] The actuator (100) for an active rear spoiler (ARS) according to the present invention can increase the torque of the final output stage by adopting a two-stage worm gear-worm wheel combination structure.

[0065] The operation of the actuator (100) for an active rear spoiler (ARS) according to the present invention will be described below with reference to FIGS. 1 to 13b.

[0066] The actuator (100) for the active rear spoiler (ARS) of the present invention first operates the BLDC driving motor (20) installed along the longitudinal direction at the rear of the housing (10), and the rotor (30) rotates due to the rotating magnetic field of the stator (40), and the first worm gear (34) formed integrally on the extension of the rotational axis (32) of the rotor (30) also rotates in the same direction.

[0067] When the first worm gear (34) above rotates, the first worm wheel (53) of the reduction gear part (50) gear-coupled to the outer periphery of the first worm gear (34) rotates, causing a first reduction and also causing the power transmission shaft (51) to rotate.

[0068] As a result, the second worm gear (55) formed on the other side of the power transmission shaft (51) rotates the second worm wheel (57) to which it is gear-coupled, thereby achieving secondary deceleration.

[0069] Accordingly, as the second worm wheel (57) is driven to rotate, a rotational output with increased torque is obtained through a two-stage deceleration from the hollow output shaft (60).

[0070] The hollow output shaft (60) is coupled with a wing drive shaft for driving the wing of an active rear spoiler (ARS), and the wing drive shaft rotates the rotation shaft (32) of the drive motor (20) clockwise or counterclockwise in accordance with the driving speed of the vehicle from a control unit provided in the vehicle body, thereby rotating the hollow output shaft (60) and the wing drive shaft to control the wing angle of the active rear spoiler (ARS). As a result, in the present invention, by controlling the wing angle of the active rear spoiler (ARS) to optimize aerodynamics, fuel efficiency improvement and driving stability can be secured.

[0071] Although the present invention has been described and illustrated with specific preferred embodiments as examples, the present invention is not limited to the above embodiments, and various changes and modifications may be made by a person having ordinary skill in the art to which the invention pertains within a scope that does not depart from the spirit of the present invention.

[0072] An actuator for an active rear spoiler according to the present invention can be applied to adjust the wing angle of an active rear spoiler (ARS) in conjunction with the driving speed of a vehicle.

Claims

1. An actuator for an active rear spoiler for adjusting the wing angle of the active rear spoiler, A hollow output shaft having a drive shaft coupled internally to rotate the wing of the above-mentioned active rear spoiler; A square housing having a through hole formed through which the rear end of the hollow output shaft passes; A cover coupled to the open opening of the housing and having a through hole formed therein through which the tip of the hollow output shaft passes; A driving motor disposed at the rear end of the housing, and having a first worm gear integrally formed on the outer periphery of a rotating shaft extending to the front end of the rotor; A reduction gear unit in which a first worm wheel is provided on one side of a power transmission shaft to perform a first reduction by being gear-coupled with the first worm gear, and a torque-increased rotational output is generated from a second worm gear provided on the other side of the power transmission shaft; and An actuator for an active rear spoiler, comprising a second worm wheel that is gear-coupled with the second worm gear to perform secondary reduction and is integrally formed on the outer periphery of the hollow output shaft to generate a torque-increased rotational output from the hollow output shaft.

2. In paragraph 1, The rotational axis of the above driving motor and the hollow output shaft are each arranged in the longitudinal direction of the housing, An actuator for an active rear spoiler in which the power transmission shaft of the above reduction gear unit is arranged in a direction perpendicular to the rotational axis of the above driving motor and the above hollow output shaft.

3. In paragraph 1, The above driving motor It is arranged at the rear of the above housing and is composed of an inner rotor type in which the rotor is arranged on the inside of the stator. An actuator for an active rear spoiler in which the first worm gear is integrally formed on an extension of a rotational shaft extending forward of the rotor.

4. In paragraph 3, Further comprising a central axis arranged on the inside of the above rotation axis. The above central axis is an actuator for an active rear spoiler rotatably supported at the front end of the cover and the rear end of the housing, respectively.

5. In paragraph 1, The above reduction gear part A power transmission shaft arranged orthogonally to the rotational axis of the above driving motor and the hollow output shaft; A first worm wheel integrally provided on one side of the outer peripheral portion of the power transmission shaft and gear-coupled to the outer peripheral portion of the first worm gear to perform the first reduction; and A second worm gear is integrally provided on the outer peripheral portion of the other side of the power transmission shaft and is gear-coupled to a second worm wheel integrally formed on the outer peripheral portion of the hollow output shaft to perform secondary reduction; An actuator for an active rear spoiler that generates torque-increased rotational output through two-stage reduction from the above hollow output shaft.

6. In paragraph 1, An actuator for an active rear spoiler that increases the torque of the hollow output shaft by employing a two-stage worm gear-worm wheel combination structure between the drive motor and the hollow output shaft.

7. In paragraph 1, The above driving motor a rotor rotatably coupled to the hollow interior of the housing; and A stator is disposed with an air gap on the outside of the rotor and generates a rotating magnetic field to rotate the rotor; The above stator A stator core having a plurality of teeth each having a “T” shape and a back yoke interconnected with the plurality of teeth to form a magnetic circuit; A bobbin made of insulating material integrally formed to surround the outer surface on which each of the plurality of teeth coils is wound; and An actuator for an active rear spoiler, comprising a coil wound on the outer surface of the bobbin.

8. In Article 7 of pPCT, The above stator core In order to increase the assembling efficiency when assembled inside the above housing, one side is flat and the other side is in the shape of an arc. At each corner portion where the flat portion and the arc portion of the stator core meet, a through hole is formed into which a fixing screw or fixing bolt is fastened to fix the stator core to the rear wall of the housing. An actuator for an active rear spoiler, wherein a screw assembly projection having a through hole formed in the above circular portion into which a fixing screw or fixing bolt is fastened is integrally formed.

9. In paragraph 1, An actuator for an active rear spoiler further comprising first and second printed circuit boards (PCBs) arranged in a divided area at both ends of the drive motor so that a motor drive circuit required to drive the drive motor is mounted thereon and electrically connected to each other.

10. In paragraph 1, First and second bearings rotatably supporting both ends of the hollow output shaft at the front end of the cover and the rear end of the housing, respectively; and An actuator for an active rear spoiler further comprising first and second oil chambers, each of which is connected to a front end of the cover and a rear end of the housing to cover the first and second bearings at both ends of the hollow output shaft, thereby realizing an interior formed by the connection of the housing and the cover as a waterproof structure.

11. In paragraph 10, An actuator for an active rear spoiler that realizes an IP69 waterproof structure by combining the above housing and cover.

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