CN206968611U

CN206968611U - Screen wiper

Info

Publication number: CN206968611U
Application number: CN201720566120.7U
Authority: CN
Inventors: 潘伟; 周伦; 凌国宇; 李勇; 李晓波
Original assignee: Chengdu Huachuan Electric Parts Co Ltd
Current assignee: Chengdu Huachuan Electric Parts Co Ltd
Priority date: 2017-05-19
Filing date: 2017-05-19
Publication date: 2018-02-06
Anticipated expiration: 2027-05-19

Abstract

Vehicle-mounted wiper field is the utility model is related to, discloses a kind of screen wiper, intelligent control is realized to wiper.The utility model includes motor, motor reduction gearbox, automatically controlled circuit board, reluctive transducer and radial magnet, and electric machine built-in has brush holder, and automatically controlled circuit board is provided with MCU and H bridge metal-oxide-semiconductor groups；Wherein, the car body controller of MCU and automobile is connected, and MCU is also connected with reluctive transducer, H bridge metal-oxide-semiconductor groups respectively, H bridge metal-oxide-semiconductor groups and motor connection；The deceleration that radial magnet is arranged on motor reduction gearbox increases the center for turning round gear, and reluctive transducer is arranged on the top of radial magnet.The utility model is applied to automobile.

Description

Screen wiper

Technical field

It the utility model is related to vehicle-mounted wiper field, more particularly to screen wiper.

Background technology

Existing vehicle-mounted wiper, is traditional wiper assembly, windscreen wiper assembly by rain shaving electrical machine, mechanical linkage structure, scrape Arm wiper forms；There are two groups of brushes in rain shaving electrical machine on brush holder, be respectively used to top gear and low or first gear, top gear and low or first gear are real It is now by being supplied to the different voltage of rain shaving electrical machine, rain shaving electrical machine operates in one direction, is realized by mechanical linkage structure The rotating of scraping arm wiper；No matter top gear, or low or first gear, rain shaving electrical machine is all using fixed voltage system, when running into The operating mode of external complex, it is such as dry scrape, it is half-dried scrape, in the case of the different external drags of windage when, windscreen wiper wiping velocities can be by not With the influence of degree, now the off-position angle of windscreen wiper, commutation angle, wiper frequency can be affected；Simultaneously as rain shaving electrical machine without Which kind of gear identical voltage system is used by, using full speed before starting and commutating, so scraping arm wiper is in front windshield Caused noise is also relatively large on glass, and very big program have impact on the comfortableness of driver's cabin；Traditional wiper assembly is simultaneously free of There is any ECU, all controls realize that such as high low speed gear switch, intermittent time is controlled by BCM (i.e. car body controller) System etc., significantly increase BCM complexity, another convenience, because rain shaving electrical machine is without speed-regulating function, so to windscreen wiper electricity The uniformity of machine has high requirement；Traditional windscreen wiper assembly employs the mechanical structure of complexity, on the one hand takes larger installation Space, also can be on the other hand strict challenge to service life.

Utility model content

The technical problems to be solved in the utility model is：A kind of screen wiper is provided, intelligent control is realized to wiper.

To solve the above problems, the technical solution adopted in the utility model is：Screen wiper, including motor, motor subtract Fast case, automatically controlled circuit board, reluctive transducer and radial magnet, electric machine built-in have brush holder, automatically controlled circuit board be provided with MCU and H bridge metal-oxide-semiconductor groups；Wherein, the car body controller of MCU and automobile connect, and MCU also respectively with reluctive transducer, H bridge metal-oxide-semiconductors Group connection, H bridge metal-oxide-semiconductor groups and motor connection；The deceleration that radial magnet is arranged on motor reduction gearbox increases the center for turning round gear, magnetic resistance Formula sensor is arranged on the top of radial magnet.

Further, one group of brush is provided with the brush holder.

Specifically, the automatically controlled circuit board is arranged on the cover plate of motor reduction gearbox.

Specifically, the reluctive transducer is arranged at the surface 3-5mm of radial magnet.

The beneficial effects of the utility model are：By setting automatically controlled circuit board, reluctive transducer and radial magnet, utilize Radial magnet and reluctive transducer collect windscreen wiper angle, velocity information, and pass to automatically controlled circuit board, and automatically controlled circuit board is on the one hand The windscreen wiper gear information of BCM outputs can be received, while is calculated in real time with pid algorithm, controls H bridge metal-oxide-semiconductors group real by pwm signal The size and polarity of terminal voltage are now controlled, electric machine speed regulation and commutation is realized, meets the use need of various operating mode difference external drags Ask；Before startup and commutation, slow down again by the mode of pwm signal is gentle to motor slow acceleration, reduce electric motor starting and change To impact, reduce noise.

Also, due to having lacked one group of brush on brush holder, thus have more spaces be used for arrange be used for EMC functions electric capacity, Inductance element, lift EMC performances.

Brief description of the drawings

Fig. 1 is motor assembly schematic diagram of the present utility model.

Marked in figure：Motor cover plate -1, H bridge metal-oxide-semiconductor group -2, slow down and increase skew gear -3, motor reduction gearbox -4, MCU-5, Automatically controlled circuit board -6, reluctive transducer -7, radial magnet -8, metal clamps -9, brush holder -10, motor stator -11.

Embodiment

The utility model is further illustrated with reference to the accompanying drawings and detailed description.

Embodiment provides a kind of motor assembly of screen wiper, as shown in Figure 1：Brush holder 10 is placed in motor stator 11 Portion, motor stator 11 and the bolt of motor reduction gearbox 4, which combine, to be fixed, and the center of gear 3 is turned round in increasing of slowing down radial magnet 8, and reluctance type passes Sensor 7 is arranged at the surface 3-5mm of radial magnet 8, and increasing of slowing down is turned round gear 3 and is fixed in motor reduction gearbox 4, automatically controlled circuit Control unit MCU5, H bridge metal-oxide-semiconductor group 2 is designed with plate 6, automatically controlled circuit board 6 passes through the strong point on motor cover plate 1, positioning Hole, fixation clamp precise positioning are fixedly mounted, and motor cover plate 1 is fixed on motor reduction gearbox 4 by multiple metal clamps 9, more Point uniform pressure is fixed, and has silica gel ring, excellent sealing waterproof among motor cover plate 1 and motor reduction gearbox 4.

Only have one group of brush on the brush holder 10 of embodiment, you can complete the speed governing and commutation of motor, while the motor have it is excellent Good rotating characteristic, is easy to speed regulating control；There is radial magnet 8 center of decelerating through motor helical gear 3, for being sensed to reluctance type Device 7 provides windscreen wiper angle, velocity information；Motor internal has an automatically controlled circuit board 6, on the one hand the MCU5 on automatically controlled circuit board 6 can connect The windscreen wiper gear information of BCM outputs is received, while MCU5 is calculated in real time with pid algorithm, and H bridge metal-oxide-semiconductors group 2 is controlled by pwm signal The size and polarity of control terminal voltage are realized, electric machine speed regulation and commutation is realized, meets the use of various operating mode difference external drags Demand；Before startup and commutation, slow down again by the mode of pwm signal is gentle to motor slow acceleration, reduce electric motor starting and The impact of commutation, reduce noise；Motor cover plate and reduction box are installed using metal clamps Multipoint Uniform pressure, and with silica gel ring, Excellent sealing is prevented into water.

Intelligent control method is as follows：

1st, MCU5 obtains the windscreen wiper gear information of BCM outputs, such as high low or first gear, interval shelves, cleaning mould by bus mode Formula etc..

2nd, MCU5 output pwm signals control H bridge metal-oxide-semiconductors group 2, is slowly increased PWM duty cycle, motor is slowly started, subtract It is small to start impact and noise.

3rd, reluctive transducer 7 is carried by the radial magnet 8 installed in the center of decelerating through motor increasing skew gear 3 to MCU5 For the angle information and velocity information of rain shaving electrical machine.

4th, MCU5, by pid algorithm, calculates subsequent time rain according to the angle and velocity information of reluctive transducer 7 Motor terminal voltage size and polarity are scraped, by PWM mode, control H bridge metal-oxide-semiconductors group 2, realizes the speed regulation to motor, direction Regulation, has real-time, overcomes resistance, ensures off-position, commutation angular accuracy, ensures wiper frequency.

5th, MCU5 before being commutated in the range of wiper, controls H bridge metal-oxide-semiconductors group 2, to electricity according to angle information again by PWM Machine slowly slows down, and reduces motor commutation impact and noise.To this accomplishes the half period of wiper, be then return to step 1 after It is continuous to perform next cycle, realize that wiper scrapes water cleaning function.

General principle of the present utility model and main feature are the foregoing described, the description of specification simply illustrates this practicality New principle, on the premise of the spirit and scope of the utility model is not departed from, the utility model also has various change and changed Enter, these changes and improvements are both fallen within claimed the scope of the utility model.

Claims

1. screen wiper, including motor and motor reduction gearbox, electric machine built-in have brush holder, it is characterised in that also including electrical control lines Road plate, reluctive transducer and radial magnet, automatically controlled circuit board is provided with MCU and H bridge metal-oxide-semiconductor groups；Wherein, MCU and automobile Car body controller connection, and MCU also be connected with reluctive transducer, H bridge metal-oxide-semiconductor groups respectively, H bridge metal-oxide-semiconductor groups and motor company Connect；The deceleration that radial magnet is arranged on motor reduction gearbox increases the center for turning round gear, and reluctive transducer is arranged on radial magnet Top.

2. screen wiper as claimed in claim 1, it is characterised in that one group of brush is provided with the brush holder.

3. screen wiper as claimed in claim 2, it is characterised in that the automatically controlled circuit board is arranged on motor reduction gearbox On cover plate.

4. screen wiper as claimed in claim 2, it is characterised in that the reluctive transducer is being arranged on radial magnet just At the 3-5mm of top.