Actuator for controlling active air-inlet grille by adopting brush direct current motor

Abstract

The utility model relates to the technical field of automobile parts, and discloses an actuator adopting a brush direct current motor to control an active air inlet grille, the actuator comprises a lower shell and an upper shell, the lower shell and the upper shell are clamped to form an outer shell of the actuator, and a driving assembly, a speed reducing mechanism, a transmission mechanism and a control unit are installed on the inner wall of the lower shell and the inner wall of the upper shell. The control unit can adjust the rotating angle and speed of the brush direct current motor in real time according to the actual requirements of a vehicle, so that the opening size of the air inlet grille can be automatically adjusted according to the temperature in a cabin, the normal temperature of an automobile engine or a battery is kept, the opening of the grille is adjusted according to the requirements, wind resistance is reduced, and energy consumption is reduced. Fuel is saved or the endurance mileage of the battery is improved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile accessories, and in particular to an actuator for controlling an active air intake grille using a brushed DC motor. Background Art

[0002] With the continuous development of automobile technology, the requirements for automobile performance and energy efficiency are gradually increasing. Among them, the engine cooling system is one of the key factors affecting automobile performance and energy efficiency. Traditional air intake grilles usually adopt a fixed design and cannot be automatically adjusted according to the working state of the engine and the external ambient temperature, thus affecting the cooling effect and fuel economy of the engine. Therefore, it is particularly important to develop an actuator that can automatically adjust the opening and closing angle of the air intake grille according to the working state of the engine and the external ambient temperature.

[0003] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0004] In order to solve the problem that traditional air intake grilles usually adopt a fixed design and cannot be automatically adjusted according to the operating status of the engine and the external ambient temperature, thereby affecting the cooling effect and fuel economy of the engine, the present application provides an actuator that uses a brushed DC motor to control an active air intake grille.

[0005] The present application provides an actuator using a brushed DC motor to control an active air intake grille, which adopts the following technical solution:

[0006] An actuator using a brushed DC motor to control an active air intake grille comprises a lower shell and an upper shell, wherein the lower shell and the upper shell are snap-fitted to form an actuator housing, and a driving assembly, a speed reduction mechanism, a transmission mechanism and a control unit are installed on the inner walls of the lower shell and the upper shell;

[0007] The driving assembly comprises a brushed DC motor fixedly mounted on the outer wall of the bottom of the lower shell, and a worm is fixedly connected to the end of the output shaft of the brushed DC motor;

[0008] The speed reduction mechanism comprises a worm wheel, a linkage gear and a driven gear, the worm wheel is meshed with the worm, a first sub-gear is fixedly connected to the outer wall of the top middle section of the worm wheel, the first sub-gear is meshed with the linkage gear, a second sub-gear is fixedly connected to the outer wall of the bottom middle section of the linkage gear, the second sub-gear is meshed with the driven gear;

[0009] The transmission mechanism includes an output port opened on the outer wall of the upper shell, the top outer wall of the driven gear is fixedly connected with an output gear, the output gear is rotatably connected to the inner wall of the output port, and its top end extends outside the upper shell;

[0010] The control unit includes an integrated board fixedly mounted on the inner wall of the lower shell, a Hall sensor is mounted on the outer wall of the integrated board, a magnet is fixedly mounted on the output shaft of the brushed DC motor at one end away from the worm, the magnet is used in conjunction with the Hall sensor, and a PCB assembly is also mounted on the outer wall of the integrated board.

[0011] Preferably, the front outer wall of the lower shell is provided with an interface, the interface is electrically connected to the PCB assembly, and the brushed DC motor and the Hall sensor are both electrically connected to the PCB assembly.

[0012] Preferably, the bottom inner wall of the lower shell is fixedly connected to two shaft seats, and the two ends of the worm are rotatably connected to the inner walls of the two shaft seats.

[0013] Preferably, a sealing ring is installed on the outer wall of the output gear, and the outer wall of the sealing ring fits with the inner wall of the output port.

[0014] Preferably, the inner walls of the lower shell and the upper shell opposite to each other are fixedly connected with a first fixed shaft, and the worm gear and the first sub-gear are rotatably connected inside the lower shell and the upper shell via the two first fixed shafts.

[0015] Preferably, the inner walls of the lower shell and the upper shell opposite to each other are fixedly connected with a second fixed shaft, and the linkage gear and the second sub-gear are rotatably connected inside the lower shell and the upper shell via the two second fixed shafts.

[0016] Preferably, a third fixed shaft is fixedly connected to the bottom inner wall of the lower shell, and the driven gear is rotatably connected to the interior of the lower shell and the upper shell through the third fixed shaft.

[0017] In summary, this application includes the following beneficial technical effects:

[0018] 1. The use of brushed DC motor as the driving source reduces costs and improves control accuracy. Through the cooperation of the deceleration mechanism and the transmission mechanism, the active air intake grille is accurately driven. The control unit can adjust the rotation angle and speed of the brushed DC motor in real time according to the actual needs of the vehicle, so that the air intake grille can automatically adjust the size of the grille opening according to the temperature in the cabin, maintain the normal temperature of the car engine or battery, and adjust the grille opening as needed, thereby reducing wind resistance, reducing energy consumption, saving fuel or increasing battery life;

[0019] 2. When the brushed DC motor starts, it will also drive the magnet to rotate. Since the Hall sensor is used in conjunction with the magnet and a unipolar magnet is used, a pulse signal is sent out for each rotation. The Hall sensor is connected to the interface through a PCB assembly and outputs a pulse signal. The body ECU determines the open and closed position and rotation angle of the air intake grille by reading the pulse signal data, which is beneficial for the internal system of the body to accurately understand the status of the air intake grille, and further accurately control it according to the status of the air intake grille. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall schematic diagram of an embodiment of the application;

[0021] Figure 2 is a first partial cross-sectional view of an embodiment of the application;

[0022] Figure 3 is a second partial cross-sectional view of the embodiment of the application;

[0023] Figure 4 It is a schematic diagram of the overall internal structure of an embodiment of the application;

[0024] Figure 5 is a schematic diagram of the structure of a brushless DC motor in an embodiment of the application;

[0025] Figure 6 It is a schematic diagram of the structure of the integrated board in the application embodiment;

[0026] Figure 7 is a front perspective schematic diagram of an embodiment of the application;

[0027] Figure 8 is a partial cross-sectional view of the lower shell in the application embodiment;

[0028] Fig. 9 is a partial cross-sectional view of the upper shell in the embodiment of the application;

[0029] Fig.10 is a pulse signal output principle diagram of an embodiment of the application;

[0030] Fig.11 is a graph showing the corresponding relationship between the grid rotation angle and the number of hall pulses in an embodiment of the application;

[0031] Fig.12 It is a circuit diagram of an embodiment of the application.

[0032] Explanation of the accompanying drawings: 1. lower shell; 101. first fixed shaft; 102. second fixed shaft; 103. third fixed shaft; 2. upper shell; 201. output port; 3. interface; 4. worm gear; 401. first sub-gear; 5. linkage gear; 501. second sub-gear; 6. driven gear; 601. output gear; 602. sealing ring; 7. brushed DC motor; 701. shaft seat; 702. worm; 703. magnet; 8. integrated board; 801. Hall sensor; 802. PCB assembly. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-12 This application is described in further detail.

[0034] The present application embodiment discloses an actuator that uses a brushed DC motor to control an active air intake grille. Figure 1-12 , an actuator using a brushed DC motor to control an active air intake grille, comprising a lower shell 1 and an upper shell 2, wherein the lower shell 1 and the upper shell 2 are snap-fitted to form a housing of the actuator, and a driving assembly, a speed reduction mechanism, a transmission mechanism and a control unit are installed on the inner walls of the lower shell 1 and the upper shell 2;

[0035] The driving assembly includes a brushed DC motor 7 fixedly mounted on the bottom outer wall of the lower shell 1, and a worm 702 is fixedly connected to the end of the output shaft of the brushed DC motor 7;

[0036] The speed reduction mechanism includes a worm wheel 4, a linkage gear 5 and a driven gear 6. The worm wheel 4 is meshed with the worm 702. A first sub-gear 401 is fixedly connected to the outer wall of the top middle section of the worm wheel 4. The first sub-gear 401 is meshed with the linkage gear 5. A second sub-gear 501 is fixedly connected to the outer wall of the bottom middle section of the linkage gear 5. The second sub-gear 501 is meshed with the driven gear 6.

[0037] The transmission mechanism includes an output port 201 formed on the outer wall of the upper shell 2, an output gear 601 is fixedly connected to the top outer wall of the driven gear 6, and the output gear 601 is rotatably connected to the inner wall of the output port 201, and its top end extends out of the upper shell 2;

[0038] The control unit includes an integrated board 8 fixedly mounted on the inner wall of the lower shell 1, a Hall sensor 801 is mounted on the outer wall of the integrated board 8, a magnet 703 is fixedly mounted on the output shaft at one end of the brushed DC motor 7 away from the worm 702, the magnet 703 is used in conjunction with the Hall sensor 801, and a PCB assembly 802 is also mounted on the outer wall of the integrated board 8.

[0039] An interface 3 is provided on the front outer wall of the lower shell 1 , and the interface 3 is electrically connected to the PCB assembly 802 , and the brushed DC motor 7 and the Hall sensor 801 are both electrically connected to the PCB assembly 802 .

[0040] Two shaft seats 701 are fixedly connected to the inner wall of the bottom of the lower shell 1 , and two ends of the worm 702 are rotatably connected to the inner walls of the two shaft seats 701 .

[0041] A sealing ring 602 is installed on the outer wall of the output gear 601 , and the outer wall of the sealing ring 602 fits with the inner wall of the output port 201 .

[0042] The first fixed shaft 101 is fixedly connected to the inner wall opposite to the lower shell 1 and the upper shell 2 , and the worm gear 4 and the first sub-gear 401 are rotatably connected inside the lower shell 1 and the upper shell 2 via the two first fixed shafts 101 .

[0043] The inner walls opposite to the lower shell 1 and the upper shell 2 are fixedly connected with the second fixed shaft 102 , and the linkage gear 5 and the second sub-gear 501 are rotatably connected inside the lower shell 1 and the upper shell 2 via the two second fixed shafts 102 .

[0044] A third fixed shaft 103 is fixedly connected to the bottom inner wall of the lower shell 1 , and the driven gear 6 is rotatably connected to the inside of the lower shell 1 and the upper shell 2 via the third fixed shaft 103 .

[0045] The implementation principle of the actuator of the active air intake grille controlled by a brushed DC motor in the embodiment of the present application is as follows: in actual application, the interface 3 is connected to the control system inside the vehicle body, and the output gear 601 in the transmission mechanism inside the actuator is connected to the active air intake grille to form a complete active air intake grille system, and then the control system inside the vehicle body generates a control signal according to parameters such as vehicle speed and engine speed, and then transmits the control signal to the PCB component 802 through the interface 3. After the PCB component 802 receives the control signal, it controls the brushed DC motor 7 to start rotating, and the output shaft of the brushed DC motor 7 drives the worm 702 The worm gear 4 meshing with the worm gear 4 rotates, and then drives the first sub-gear 401 to rotate through the cooperation of the reduction mechanism. Since the first sub-gear 401 drives the linkage gear 5 meshing with the worm gear 4 to rotate, the linkage gear 5 drives the second sub-gear 501 at the bottom to rotate, and drives the driven gear 6 meshing with the worm gear 4 to rotate through the second sub-gear 501. At this time, the reduction mechanism reduces the speed and increases the torque. Then, through the cooperation of the transmission mechanism, the driven gear 6 drives the output gear 601 to rotate on the inner wall of the output port 201 when the driven gear 6 rotates, and transmits the power to the grille blades, driving the grille blades to rotate to adjust the intake air flow.

[0046] Reference Figure 4 , Figure 5 , Figure 6 and Fig.10The signal of Hall sensor 801 is read by the vehicle body ECU (not shown in the figure). The ECU has a self-learning function. When it is first assembled or the vehicle body is powered on again, the maximum opening and closing positions are memorized through self-learning. The grille is closed to the final position, and the Hall sensor 801 is reset to zero and stored in the ECU chip. When the brushed DC motor 7 rotates forward, the grille is opened, and the Hall sensor 801 outputs a pulse signal. The ECU starts counting. The brushed DC motor 7 rotates forward through the reduction mechanism and the transmission mechanism to drive the grille to open. At this time, the brushed DC motor 7 drives the magnet 703 to rotate. When the magnet 703 rotates, it cooperates with the Hall sensor 801 to output a pulse signal. The ECU starts counting. When the pulse signal of Hall sensor 801 is read from 0, that is, each time the brushed DC motor 7 rotates one circle, a pulse signal is added. The corresponding relationship between the rotation angle of the grille and the number of pulses of the brushed DC motor 7 is referred to. Fig.11 , the maximum rotation angle of the grille is 90°, that is, the pulse signal data reaches 238, stops moving, and the grille is in a 90° open state. When the Hall sensor 801 pulse signal starts to read from 238, that is, the brushed DC motor 7 reduces a pulse signal for each reverse rotation. The pulse signal data reaches 0 and stops moving, that is, the grille is completely closed. Since the Hall sensor 801 is used in conjunction with the magnet 703, the magnet 703 adopts a unipolar magnet, that is, each rotation sends a pulse signal, and the Hall sensor 801 is connected to the interface 3 through the PCB assembly 802 to output a pulse signal. The interface 3 transmits the pulse signal to the control system in the vehicle body. The vehicle body ECU determines the open and closed position and rotation angle of the air intake grille by reading the pulse signal data, which is conducive to the internal system of the vehicle body to accurately understand the state of the air intake grille, and further accurately control it according to the state of the air intake grille;

[0047] At this time, the control system inside the vehicle body can integrate the transmitted pulse signal to further determine the opening or closing angle of the air intake grille, and accurately control the opening and closing angle of the active air intake grille by controlling the speed and direction of the fine-tuning brush DC motor 7. When the vehicle is running at high speed or the engine temperature is high, the air intake volume is increased to improve the engine's operating efficiency; when the vehicle is running at low speed or the engine temperature is low, the air intake volume is reduced to reduce wind resistance and fuel consumption.

[0048] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0049] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0050] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An actuator for controlling an active air intake grille using a brushed DC motor, comprising a lower shell (1) and an upper shell (2), characterized in that: The lower shell (1) and the upper shell (2) are snap-fitted to form the outer shell of the actuator, and the inner walls of the lower shell (1) and the upper shell (2) are equipped with a driving assembly, a speed reduction mechanism, a transmission mechanism and a control unit; The driving assembly comprises a brushed DC motor (7) fixedly mounted on the outer wall of the bottom of the lower shell (1), and a worm (702) is fixedly connected to the end of the output shaft of the brushed DC motor (7); The speed reduction mechanism comprises a worm wheel (4), a linkage gear (5) and a driven gear (6); the worm wheel (4) is meshed with the worm (702); a first sub-gear (401) is fixedly connected to the outer wall of the top middle section of the worm wheel (4); the first sub-gear (401) is meshed with the linkage gear (5); a second sub-gear (501) is fixedly connected to the outer wall of the bottom middle section of the linkage gear (5); and the second sub-gear (501) is meshed with the driven gear (6); The transmission mechanism comprises an output port (201) formed on the outer wall of the upper shell (2); an output gear (601) is fixedly connected to the top outer wall of the driven gear (6); the output gear (601) is rotatably connected to the inner wall of the output port (201), and its top end extends out of the upper shell (2); The control unit comprises an integrated board (8) fixedly mounted on the inner wall of the lower shell (1); a Hall sensor (801) is mounted on the outer wall of the integrated board (8); a magnet (703) is fixedly mounted on the output shaft of the brushed DC motor (7) at one end away from the worm (702); the magnet (703) is used in conjunction with the Hall sensor (801); and a PCB assembly (802) is also mounted on the outer wall of the integrated board (8).

2. The actuator for controlling an active air intake grille using a brushed DC motor according to claim 1, characterized in that: The front outer wall of the lower shell (1) is provided with an interface (3), the interface (3) is electrically connected to the PCB assembly (802), and the brushed DC motor (7) and the Hall sensor (801) are both electrically connected to the PCB assembly (802).

3. The actuator for controlling an active air intake grille using a brushed DC motor according to claim 1, characterized in that: The bottom inner wall of the lower shell (1) is fixedly connected to two shaft seats (701), and the two ends of the worm (702) are rotatably connected to the inner walls of the two shaft seats (701).

4. The actuator for controlling an active air intake grille using a brushed DC motor according to claim 1, characterized in that: A sealing ring (602) is installed on the outer wall of the output gear (601), and the outer wall of the sealing ring (602) is in contact with the inner wall of the output port (201).

5. The actuator for controlling an active air intake grille using a brushed DC motor according to claim 1, characterized in that: The inner walls of the lower shell (1) and the upper shell (2) opposite to each other are fixedly connected with a first fixed shaft (101), and the worm gear (4) and the first sub-gear (401) are rotatably connected inside the lower shell (1) and the upper shell (2) via the two first fixed shafts (101).

6. The actuator for controlling an active air intake grille using a brushed DC motor according to claim 1, characterized in that: The inner walls of the lower shell (1) and the upper shell (2) opposite to each other are fixedly connected with a second fixed shaft (102), and the linkage gear (5) and the second sub-gear (501) are rotatably connected inside the lower shell (1) and the upper shell (2) via the two second fixed shafts (102).

7. The actuator for controlling an active air intake grille using a brushed DC motor according to claim 1, characterized in that: A third fixed shaft (103) is fixedly connected to the bottom inner wall of the lower shell (1), and the driven gear (6) is rotatably connected to the interior of the lower shell (1) and the upper shell (2) via the third fixed shaft (103).

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