Motor power protection module for adjusting position of automobile headlamp

Abstract

The utility model discloses a motor power protection module for adjusting the position of an automobile headlamp. The power supply unit is electrically connected with the motor driving chip unit and the overvoltage and undervoltage detection unit, the headlamp position adjusting signal unit is in communication connection with the motor driving chip unit and the overvoltage and undervoltage detection unit, and the overvoltage and undervoltage detection unit is in communication connection with the motor driving chip unit. The motor driving chip unit is in communication connection with the adjusting motor; the headlamp position adjusting signal unit is provided with output voltages of different gears. The motor driving chip unit is provided with a motor working mode switch through resistor voltage division; and the over-voltage and under-voltage detection unit is provided with a motor driving chip working switch through resistor voltage division. According to the utility model, the locking of the adjusting motor due to out-of-range work caused by abnormal voltage can be effectively prevented.

Description

Technical field:

[0001] The utility model belongs to the technical field of automobile headlight position adjustment, and particularly relates to a motor power protection module for automobile headlight position adjustment. Background technology:

[0002] With the rapid development of automotive electronics, each car will be equipped with a corresponding headlight position adjustment module to adjust the position of the headlights. The headlight position adjustment module mainly uses a motor driver chip to control the headlight position adjustment motor. In the existing adjustment motor, the driver chip controls the motor to adjust the headlight position according to the signal given by the car. When the signal voltage given by the car is abnormal, it often causes the adjustment motor to work out of range and get stuck, affecting the service life of the adjustment motor.

[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility model content:

[0004] The purpose of the utility model is to provide a motor power protection module for adjusting the position of automobile headlights, thereby overcoming the defects in the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides a motor power protection module for adjusting the position of automobile headlights, comprising a power supply unit, a headlight position adjustment signal unit, a motor drive chip unit, and an over-voltage and under-voltage detection unit; the power supply unit is electrically connected to the motor drive chip unit and the over-voltage and under-voltage detection unit respectively, the headlight position adjustment signal unit is communicatively connected to the motor drive chip unit and the over-voltage and under-voltage detection unit respectively, the over-voltage and under-voltage detection unit is communicatively connected to the motor drive chip unit, and the motor drive chip unit is communicatively connected to the adjustment motor; the headlight position adjustment signal unit is provided with output voltages of different gears, and outputs voltages of corresponding gears according to the user adjusting the corresponding switch; the motor drive chip unit sets a motor working mode switch through a resistor voltage divider, and adjusts the motor working mode according to the comparison between the output voltage of the headlight position adjustment signal unit and the motor working mode switch; the over-voltage and under-voltage detection unit sets a motor drive chip working switch through a resistor voltage divider, and compares the output voltage of the headlight position adjustment signal unit with the motor drive chip working switch, and outputs a high level or low level signal to the motor drive chip unit to start and close the motor drive chip unit according to the comparison result.

[0006] Preferably, in the technical solution, the motor drive chip unit adopts AL4205SP.

[0007] Preferably, in the technical solution, the over-voltage and under-voltage detection unit adopts Aip2903D.

[0008] Preferably, in the technical solution, the power supply unit supplies power to the motor drive chip unit and the over-voltage and under-voltage detection unit, and provides the motor drive chip unit and the over-voltage and under-voltage detection unit with a reference voltage required for resistor voltage division.

[0009] Preferably, in the technical solution, the motor operating mode switch includes a motor operating mode upper limit switch and a motor operating mode lower limit switch. When the output voltage of the headlight position adjustment signal unit is less than the motor operating mode lower limit switch, the motor drive chip unit outputs a reverse signal to the adjustment motor. When the output voltage of the headlight position adjustment signal unit is greater than the motor operating mode upper limit switch, the motor drive chip unit outputs a forward signal to the adjustment motor. When the output voltage of the headlight position adjustment signal unit is between the motor operating mode upper limit switch and the lower limit switch, the motor drive chip unit outputs a standby signal to the adjustment motor.

[0010] Preferably, in the technical solution, the motor driver chip working switch includes an upper limit switch and a lower limit switch for the motor driver chip. When the output voltage of the headlight position adjustment signal unit is between the upper limit switch and the lower limit switch for the motor driver chip, the over- and under-voltage detection unit outputs a high-level signal to the motor driver chip unit, and the motor driver chip unit works normally. When the output voltage of the light position adjustment signal unit is greater than the upper limit switch for the motor driver chip or less than the lower limit switch for the motor driver chip, the over- and under-voltage detection unit outputs a low-level signal to the motor driver chip unit, and the motor driver chip unit stops working.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The over- and under-voltage detection unit can timely detect the output voltage signal of the headlight position adjustment signal unit. When the output voltage is out of the set range, the output of the motor driver chip unit can be stopped in time to stop the adjustment motor from working. This can effectively prevent the adjustment motor from working out of range and getting stuck due to abnormal voltage, thereby extending the service life of the adjustment motor. Description of the drawings:

[0013] Figure 1 This is a structural principle block diagram of the power protection module of the automobile headlight position adjustment motor of the utility model;

[0014] Figure 2 This is the circuit diagram of the power protection module of the automobile headlight position adjustment motor of the utility model. Specific implementation method:

[0015] The specific implementation modes of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0016] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0017] like Figure 1-2 As shown, a motor power protection module for adjusting the position of automobile headlights includes a 24V power supply unit 101, a headlight position adjustment signal unit 102, a motor drive chip unit 103, and an over-voltage and under-voltage detection unit 104; the motor drive chip unit 103 adopts AL4205SP, the over-voltage and under-voltage detection unit 104 adopts Aip2903D, the 24V power supply unit 101 is respectively connected to the No. 20 pin of the motor drive chip unit 103 and the No. 8 pin of the over-voltage and under-voltage detection unit 104, and the 24V power supply unit 101 supplies power to the motor drive chip unit 103 and the over-voltage and under-voltage detection unit 104; the headlight position adjustment signal unit 102 is provided with output voltages of different gears, and the voltage of the corresponding gear is output according to the user adjusting the corresponding switch;

[0018] The 24V power supply unit 101 is connected to the No. 8 and No. 10 pins of the motor drive chip unit 103, the circuit of the No. 10 pin is provided with a resistor R9, the circuit of the No. 8 pin is provided with resistors R7 and R5, the resistors R9, R7 and R5 perform resistance voltage division, the No. 8 pin is used as the lower limit switch of the motor working mode, the No. 10 pin is used as the upper limit switch of the motor working mode, and the 24V power supply unit 101 provides the motor drive chip unit 103 with the reference voltage required for the upper and lower limit voltage division;

[0019] The 24V power supply unit 101 is connected to the No. 2 and No. 5 pins of the over-voltage and under-voltage detection unit 104, the circuit of the No. 5 pin is provided with a resistor R11, the circuit of the No. 2 pin is provided with resistors R12 and R13, the resistors R11, R12 and R13 perform resistance voltage division, the No. 2 pin is used as the lower limit switch of the motor drive chip, the No. 5 pin is used as the upper limit switch of the motor drive chip, and the 24V power supply unit 101 provides the reference voltage required for the upper and lower limit voltage division for the over-voltage and under-voltage detection unit 104;

[0020] The headlight position adjustment signal unit 102 is connected to the No. 9 pin of the motor drive chip unit 103, and the circuit of the No. 9 pin is provided with a resistor R3, and the headlight position adjustment signal unit 102 sends the output voltage signal to the motor drive chip unit 103 through the No. 9 pin; the headlight position adjustment signal unit 102 is connected to the No. 3 and No. 6 pins of the over-voltage and under-voltage detection unit 104, and the circuit of the No. 3 and No. 6 pins is provided with a resistor R2, and the headlight position adjustment signal unit 102 sends the output voltage signal to the over-voltage and under-voltage detection unit 104 through the No. 3 and No. 6 pins;

[0021] Pins 1 and 7 of the over-voltage and under-voltage detection unit 104 are connected to pin 12 of the motor driving chip unit 103 , and the regulating motor 105 is connected to pins Q1 and Q2 of the motor driving chip unit 103 .

[0022] The headlight position adjustment signal unit 102 sends the output voltage signal to the motor drive chip unit 103, and the motor drive chip unit 103 compares the output voltage with the lower limit switch of the motor working mode on pin 8 and the upper limit switch of the motor working mode on pin 10. If it is lower than pin 8, the Q1 pin outputs a low level and the Q2 pin outputs a high level, and the adjustment motor 105 is in the reverse mode. If it is higher than pin 10, the Q1 pin outputs a high level and the Q2 pin outputs a low level, and the adjustment motor 105 is in the forward mode. If it is between pins 8 and 10, the Q1 pin outputs a high level and the Q2 pin outputs a high level, and the adjustment motor 105 is in the standby state and stops working.

[0023] The headlight position adjustment signal unit 102 sends the output voltage signal to the over-voltage / under-voltage detection unit 104, which compares the output voltage with the lower limit switch of the motor driver chip at pin 2 and the upper limit switch of the motor driver chip at pin 5. If the voltage is lower than pin 2, it is in an undervoltage state, pin 1 of the over-voltage / under-voltage detection unit 104 outputs a low level, and the motor driver chip unit 103 stops working. If the voltage is higher than pin 5, it is in an overvoltage state, pin 7 of the over-voltage / under-voltage detection unit 104 outputs a low level, and the motor driver chip unit 103 stops working. If the voltage is between pin 2 and pin 5, the over-voltage / under-voltage detection unit 104 outputs a high level to pin 12 of the motor driver chip unit 103, and the motor driver chip unit 103 works normally.

[0024] The voltage signal output by the headlight position adjustment signal unit 102 can be detected in time through the over-voltage and under-voltage detection unit 104. When the voltage signal is not within the set range, the output of the motor drive chip unit 103 can be stopped in time to stop the adjustment motor 105 from working. This can effectively prevent the adjustment motor 105 from working out of range and getting stuck due to abnormal voltage, thereby extending the service life of the adjustment motor 105.

[0025] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. A motor power protection module for adjusting the position of automobile headlights, characterized in that: It includes a power supply unit, a headlight position adjustment signal unit, a motor drive chip unit, and an over-voltage and under-voltage detection unit; the power supply unit is electrically connected to the motor drive chip unit and the over-voltage and under-voltage detection unit respectively, the headlight position adjustment signal unit is communicatively connected to the motor drive chip unit and the over-voltage and under-voltage detection unit respectively, the over-voltage and under-voltage detection unit is communicatively connected to the motor drive chip unit, and the motor drive chip unit is communicatively connected to the adjustment motor; the headlight position adjustment signal unit is provided with output voltages of different gears; the motor drive chip unit sets a motor working mode switch by means of a resistor voltage divider, and adjusts the motor working mode according to the comparison between the output voltage of the headlight position adjustment signal unit and the motor working mode switch; the over-voltage and under-voltage detection unit sets a motor drive chip working switch by means of a resistor voltage divider, and compares the output voltage of the headlight position adjustment signal unit with the motor drive chip working switch, and outputs a high level or low level signal to the motor drive chip unit to start and close the motor drive chip unit according to the comparison result.

2. The automobile headlight position adjustment motor power protection module according to claim 1 is characterized in that: The motor driver chip unit uses AL4205SP.

3. The automobile headlight position adjustment motor power protection module according to claim 2 is characterized in that: The over-voltage and under-voltage detection unit uses Aip2903D.

4. The automobile headlight position adjustment motor power protection module according to claim 3 is characterized in that: The power supply unit supplies power to the motor drive chip unit and the over-voltage and under-voltage detection unit, and provides the motor drive chip unit and the over-voltage and under-voltage detection unit with a reference voltage required for resistor voltage division.

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