CN114251024B - PWM control-introduced self-closing automobile back door lock - Google Patents
PWM control-introduced self-closing automobile back door lock Download PDFInfo
- Publication number
- CN114251024B CN114251024B CN202111570994.7A CN202111570994A CN114251024B CN 114251024 B CN114251024 B CN 114251024B CN 202111570994 A CN202111570994 A CN 202111570994A CN 114251024 B CN114251024 B CN 114251024B
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- motor
- door lock
- state
- output voltage
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Classifications
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B81/00—Power-actuated vehicle locks
- E05B81/02—Power-actuated vehicle locks characterised by the type of actuators used
- E05B81/04—Electrical
- E05B81/06—Electrical using rotary motors
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B77/00—Vehicle locks characterised by special functions or purposes
- E05B77/36—Noise prevention; Anti-rattling means
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B81/00—Power-actuated vehicle locks
- E05B81/24—Power-actuated vehicle locks characterised by constructional features of the actuator or the power transmission
- E05B81/32—Details of the actuator transmission
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B83/00—Vehicle locks specially adapted for particular types of wing or vehicle
- E05B83/16—Locks for luggage compartments, car boot lids or car bonnets
- E05B83/18—Locks for luggage compartments, car boot lids or car bonnets for car boot lids or rear luggage compartments
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B85/00—Details of vehicle locks not provided for in groups E05B77/00 - E05B83/00
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- Lock And Its Accessories (AREA)
Abstract
The invention discloses a PWM (pulse-width modulation) controlled self-closing automobile back door lock, which comprises a motor, wherein the motor is connected with a lock body, and the lock body comprises two continuous states: the first state is: the door lock is sucked to return to the first return position; the second state is: the door lock is opened to return to the second return position, and when the door lock is in the attraction state, the output voltage of the motor is V 1 When in the first return state, the output voltage of the motor is V 2 When the door lock is in an open state, the output voltage of the motor is V 3 In the first return state, the output voltage of the motor is V 2 And introducing PWM waves with different duty ratios D according to the output voltage of the motor in different states, thereby realizing the speed regulation of the motor. The invention introduces the PWM control mode into the self-closing back door lock of the automobile, greatly reduces the running noise of the motor of the automobile door lock and improves the sound quality of the whole automobile and the user experience.
Description
Technical Field
The invention relates to the technical field of automobile accessories, in particular to a self-closing automobile back door lock introducing PWM control.
Background
Under the background of the vigorous development of the domestic automobile industry, the automobile electronic industry also enters a track with high-speed development, and the automobile electronic technology is generally regarded as the most effective technical means for improving and enhancing the automobile performance. The current self-suction type automobile back door lock tends to be mature in function, on one hand, a host factory pays more and more attention to the sound quality of a whole automobile, and the motor is used as an important working unit in the door lock, so that the working sound quality is very important. On the other hand, energy conservation and environmental protection are more and more emphasized in the modern society, and the participation of the whole people is higher and higher.
The motor during operation of present car back door lock generally can produce great noise, also can influence the life-span of transmission parts such as gear in the lock.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects of the prior art, the PWM control mode is introduced into the motor of the self-closing automobile back door lock, and the problem of high motor noise in the prior art can be solved.
The technical scheme is as follows: the self-closing automobile back door lock introducing PWM control comprises a motor, wherein the motor is connected with a lock body, and the lock body comprises two continuous states: the first state is: the door lock is closed to return to the first return position; the second state is: the door lock is opened to return to the second return position, and when the door lock is in the suction state, the output voltage of the motor is V 1 When in the first return state, the output voltage of the motor is V 2 When the door lock is in an open state, the output voltage of the motor is V 3 When in the first return state, the output voltage of the motor is V 2 And introducing PWM waves with different duty ratios D according to the output voltage of the motor in different states, thereby realizing the speed regulation of the motor.
Further, it includes:
the duty cycle D is represented as:
wherein T is the time of high level holding in the output PWM, i.e. the time of the motor energized by the whole vehicle, T is the time of the clock period of the PWM, and the average value of the voltage at the two ends of the armature of the motor, i.e. the output voltage U of the motor 0 Expressed as:
wherein, U s The voltage at two ends of the armature winding of the direct current motor is the output voltage of the whole vehicle;
therefore, under the condition that the voltage of the whole vehicle is not changed, the output voltage of the motor depends on the size of the duty ratio D, and the average value U of the voltage at two ends of the armature of the motor is changed by changing the value of D 0 Therefore, the purpose of controlling the rotating speed of the motor is achieved, namely PWM speed regulation is realized.
Further, comprising:
the duty ratio in the door lock attraction state is expressed as: d 1 ＝V 1 /U s The duty cycle in the first recovery state is expressed as: d 2 ＝V 2 /U s The duty cycle in the door lock open state is expressed as: d 3 ＝V 3 /U s The duty ratio in the second returning state is expressed as: d 4 ＝V 2 /U s 。
Further, comprising:
the unlocking state of the door lock is as follows: the motor drives the driving gear to rotate clockwise, when the driving gear rotates clockwise, the cam is driven to rotate, the cam is linked with the driving handle connecting rod to move, the pawl releasing handle is driven by the driving handle connecting rod, and therefore the pawl is driven by the pawl releasing handle to be disengaged outwards;
the first reset state is: when the pawl is disengaged, the cam is automatically reset to a middle position by the reset spring immediately;
the door lock suction state is as follows: the motor drives the driving gear to rotate anticlockwise, the driving gear rotates anticlockwise to drive the cam to rotate, and the cam is linked with the connecting rod to move, so that the connecting rod pushes the clamping plate to rotate anticlockwise until the clamping plate is completely meshed;
the second return state is: as soon as the catch plates are fully engaged, the cam is automatically reset to the neutral position by the reset spring.
Further, comprising:
the lock still includes worm and worm wheel, and the worm is installed in the one end of motor, and with the multi-tooth meshing transmission of worm wheel, drive gear and worm wheel transmission, drive gear and actuating handle and cam are settled on the lock body through first installed part.
Further, comprising:
the first mounting member is a rivet.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: the invention introduces the PWM control mode into the self-closing back door lock of the automobile, greatly reduces the running noise of the motor of the automobile door lock and improves the sound quality of the whole automobile and the user experience.
PWM adjusts the speed of the motor and controls the output voltage of the motor, so that the door lock can normally work under low voltage, thereby saving electric energy, prolonging the service life of parts such as a door lock gear and the like, and saving cost.
Drawings
FIG. 1 is a schematic diagram of a PWM according to the present invention.
Detailed Description
The technical solutions of the present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
The invention provides a self-closing automobile back door lock introducing PWM control, and the specific structure of the self-closing automobile back door lock can refer to the structure in the application number of 201921106592X, and the working principle is as follows:
the realization of the electric opening function: the motor is arranged on the lock body, when the motor rotates reversely, the worm on the motor drives the worm wheel to rotate, and the worm wheel drives the driving gear to rotate clockwise (the clockwise rotation). When the driving gear rotates clockwise, the cam is driven to rotate, the cam is linked with the driving handle connecting rod to move, the pawl releasing handle is driven by the driving handle connecting rod, one end of the pawl is inserted into the U-shaped groove of the pawl releasing handle, and therefore the pawl is driven by the pawl releasing handle to be disengaged outwards, and the opening function is achieved. When the pawl is disengaged, the cam is automatically reset to the neutral position by the reset spring immediately, and the neutral position switch of the motor checks whether the cam returns to the neutral position or not.
The realization of self-suction function: when the motor rotates reversely, the worm on the motor drives the worm wheel to rotate, and the worm wheel drives the driving gear to rotate anticlockwise (reverse rotation). The cardboard is in the state of opening, and when drive gear anticlockwise rotation, it is rotatory to drive the cam, and the motion of cam linkage connecting rod to promote the cardboard anticlockwise rotation by the connecting rod, mesh direction promptly, simultaneously, the cardboard promotes the base knob switch touching handle, presses the base knob switch by the base knob switch touching handle, detects whether the cardboard meshes completely, thereby realizes closing the function of closing the door certainly. When the clamping plates are completely meshed, the cam is automatically reset to the middle position immediately by the reset spring, and the middle position switch of the motor checks whether the cam returns to the middle position or not.
Thus, there are 4 states, two consecutive states:
the first state is: the door lock is sucked to return to the first return position; the second state is: the door lock is opened to return to the second return position, and when the door lock is in the suction state, the output voltage of the motor is V 1 In the first return state, the output voltage of the motor is V 2 When the door lock is in an open state, the output voltage of the motor is V 3 In the first return state, the output voltage of the motor is V 2 And introducing PWM waves with different duty ratios D according to the output voltage of the motor in different states, thereby realizing the speed regulation of the motor. In the embodiment, the PWM wave is introduced to the door lock, the whole car factory needs to realize PWM through programs and hardware in an ECU (electronic control Unit), so that the voltage output to the door lock is the required low voltage, for example, the voltage is 10V when the door lock is closed, and the return voltage is 6V; when the voltage is 8V when the switch is turned on, the return voltage is 6V, and specifically, two methods are adopted for changing the voltage: one is to use the electronic governor, and the other is to use the software, because the additional installation of the electronic governor will increase the cost of the hardware, so the latter is generally used, and it is troublesome to directly change the voltage in the program, so the use of the electronic governor is generatedThe average power of the motor is changed by intermittent power supply to change the speed of the motor, and the intermittent power supply is PWM.
Because the voltage required by the motor is different under each state, in the prior art, when the automobile ECU powers the door lock, the rotating speed of the motor is kept unchanged in the processes of attracting, returning, opening and returning, so that the temperature of the motor rises quickly during working, and the rotating speed is unchanged, so that the motor also generates larger noise during working. A Pulse Width Modulation (PWM) control mode is introduced, and the DC motor is regulated by changing the duty ratio of output pulses, so that the output voltage is controlled.
As shown in fig. 1, PWM is meant as pulse width modulation, which is, as the name implies, the width of a pulse, which is equivalent to obtaining a desired waveform (including shape and amplitude) by modulating the width of a series of pulses. Its duty cycle D is expressed as:
wherein D is within the range of 0-1,t, and is the time for holding high level in the output PWM, i.e. the time for the motor to be electrified by the whole vehicle, T is the time of the clock period of the PWM, and the average value of the voltage at two ends of the armature of the motor, i.e. the output voltage U of the motor 0 Expressed as:
wherein, U s The voltage at two ends of the armature winding of the direct current motor is the output voltage of the whole vehicle;
therefore, under the condition that the voltage of the whole vehicle is not changed, the output voltage of the motor depends on the size of the duty ratio D, and the average value U of the voltage at two ends of the armature of the motor is changed by changing the value of D 0 Therefore, the purpose of controlling the rotating speed of the motor is achieved, namely PWM speed regulation is realized.
In the present embodiment of the present invention,
the duty cycle in the door lock pick-up state is expressed as: d 1 ＝V 1 /U s ，
The duty cycle in the first recovery state is represented as: d 2 ＝V 2 /U s ，
The duty cycle in the door lock open state is expressed as: d 3 ＝V 3 /U s ，
The duty cycle in the second return state is expressed as: d 4 ＝V 2 /U s 。
The host factory defines the duty ratio by setting ECU software according to the output voltage requirements of the motor with 4 actions of the door lock, and the motor rotating speed can be controlled by changing the duty ratio, so that the voltage is 10V when the door lock is closed, and the return voltage is 6V; the voltage is 8V when the switch is turned on, and the return voltage is 6V.
Namely: with PWM control, the output voltage of the whole vehicle dcu is adjusted by detecting the current when outputting the voltage, thereby ensuring that the voltage 10v,6v,8v,6v is input to the door lock. If the output voltage of the whole vehicle is 12v, the duty ratio of the door lock in the closing process is 10/12, the duty ratio in the first return state is 6/12, the duty ratios in other states are analogized, if the output voltage of the whole vehicle is 14v, the closing duty ratio of the door lock is 10/14, and the duty ratios in other states are analogized. Without PWM control, such low voltage operation cannot be achieved. For example, the voltage output by the whole vehicle is 12v, and the voltage for the door lock is only 12v. The door lock can act under low voltage, so that the running noise of a motor of the door lock is reduced, the requirements on parts such as gears and the like in the door lock are reduced, the service lives of the parts such as the gears and the like of the door lock are prolonged, the cost is correspondingly reduced, and the energy is saved.
Claims (4)
1. The utility model provides a introduce PWM control from inhaling and close car back door lock which characterized in that, includes the motor, the motor is connected with the lock body, the lock body includes two kinds of continuous states: the first state is: the door lock is sucked to return to the first return position; the second state is: the door lock is opened to return to the second return position, and when the door lock is in the suction state, the output voltage of the motor is V 1 In the first return state, the motorHas an output voltage of V 2 When the door lock is in an open state, the output voltage of the motor is V 3 When in the first return state, the output voltage of the motor is V 2 Introducing PWM waves with different duty ratios D according to the output voltage of the motor in different states, thereby realizing the speed regulation of the motor;
the duty cycle D is represented as:
wherein T is the time of high level holding in the output PWM, i.e. the time of the motor energized by the whole vehicle, T is the time of the clock period of the PWM, and the average value of the voltage at the two ends of the armature of the motor, i.e. the output voltage U of the motor 0 Expressed as:
wherein, U s The voltage at two ends of the armature winding of the direct current motor is the output voltage of the whole vehicle;
therefore, under the condition that the voltage of the whole vehicle is not changed, the output voltage of the motor depends on the size of the duty ratio D, and the average value U of the voltage at two ends of the armature of the motor is changed by changing the value of D 0 Thereby achieving the purpose of controlling the rotating speed of the motor, namely realizing PWM speed regulation;
the duty ratio in the door lock attraction state is expressed as: d 1 ＝V 1 /U s The duty cycle in the first reset state is represented as: d 2 ＝V 2 /U s The duty cycle in the door lock open state is expressed as: d 3 ＝V 3 /U s The duty ratio in the second returning state is expressed as: d 4 ＝V 2 /U s 。
2. The PWM controlled self-closing automotive back door lock according to claim 1, wherein the door lock open state is: the motor drives the driving gear to rotate clockwise, when the driving gear rotates clockwise, the cam is driven to rotate, the cam is linked with the driving handle connecting rod to move, the pawl releasing handle is driven by the driving handle connecting rod, and therefore the pawl is driven by the pawl releasing handle to be disengaged outwards;
the first reset state is: when the pawl is disengaged, the cam is automatically reset to a middle position by the reset spring immediately;
the door lock suction state is as follows: the motor drives the driving gear to rotate anticlockwise, the driving gear rotates anticlockwise to drive the cam to rotate, and the cam is linked with the connecting rod to move, so that the connecting rod pushes the clamping plate to rotate anticlockwise until the clamping plate is completely meshed;
the second return state is: as soon as the catch plates are fully engaged, the cam is automatically reset to the neutral position by the reset spring.
3. The self-closing automotive back door lock incorporating PWM control according to claim 2, further comprising a worm and a worm wheel, the worm being mounted at one end of the motor and in multi-tooth meshing engagement with the worm wheel, the driving gear being in drive with the worm wheel, the driving gear being disposed on the lock body with the driving handle and the cam through the first mounting member.
4. The PWM controlled self-closing automotive tailgate lock according to claim 3, wherein the first mounting member is a rivet.
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| CN202111570994.7A CN114251024B (en) | 2021-12-21 | 2021-12-21 | PWM control-introduced self-closing automobile back door lock |
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| CN202111570994.7A CN114251024B (en) | 2021-12-21 | 2021-12-21 | PWM control-introduced self-closing automobile back door lock |
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| CN114251024B true CN114251024B (en) | 2023-03-03 |
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| FR3140642A1 (en) * | 2022-10-06 | 2024-04-12 | Akwel Vigo Spain Sl | Method for managing the noise of a lock arrangement for an opening of a motor vehicle. |
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