CN107139887B

CN107139887B - Automobile wiper

Info

Publication number: CN107139887B
Application number: CN201710521254.1A
Authority: CN
Inventors: 卢聪; 汪正山; 黄广强
Original assignee: Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2017-06-30
Filing date: 2017-06-30
Publication date: 2022-02-01
Anticipated expiration: 2037-06-30
Also published as: CN107139887A

Abstract

The invention relates to the field of automobile parts, in particular to an automobile wiper which comprises a wiper blade, wherein the wiper blade is connected to a wiper arm, the wiper arm is connected with a driving device for driving the wiper blade to move along a straight line, the movement direction of the traditional wiper is changed, the fan-shaped movement of the traditional wiper is changed into the straight line movement, the wiper blade is driven by the driving device to move along the straight line, the defect that the traditional wiper can only partially wipe a front windshield glass in a fan shape is overcome, the wiping area of the front windshield glass can be increased through the straight line movement of the wiper blade, the visible surface of the wiper glass is enlarged, the traditional fan-shaped wiping surface is changed, and meanwhile, when the wiper is not used, the initial position of the wiper blade is enabled to be stopped at the side of an A column of a driver assistant, and the effect that the front view and the lower view are influenced because the wiper blade is stopped on a decorative plate is effectively avoided.

Description

Automobile wiper

Technical Field

The invention relates to the field of automobile parts, in particular to an automobile wiper.

Background

The present invention relates to a wiper blade for an automobile, and more particularly, to a wiper blade for an automobile, which is used to wipe a windshield glass, and which has an effect of removing dust and foreign substances from the windshield glass by using a cleaning solution in the case of relatively large dust. The driver can have good front vision.

At present, the wiper mechanism can be divided into two types:

the device is characterized in that a four-bar mechanism is driven by a motor to drive two scraping arm output shafts to drive two scraping arms, and two scraping blades are driven on the scraping arms to move; in addition, two electronic motors directly drive two scraping arm output shafts respectively, and scraping brush angles on 2 scraping arm output shafts are controlled to drive scraping blades on the scraping arms to move. The arrangement mode of the mechanism is that the linkage rod of the wiper motor is partially arranged in the position of a water flowing groove of the whole vehicle, the linkage rod penetrates through the front windshield decorative plate to expose the two output shafts, and the wiper arm is arranged on the output shafts to drive the wiper blade on the glass to move, so that the function of wiping foreign matters on the front windshield by the wiper blade is realized.

At present, the scraping and brushing form can be divided into two types:

one embodiment is that the two scraping blades move in opposite rotation directions through the output shaft to be scraped oppositely; in addition, the two scraping blades realize the same rotation direction through the output shaft and are used for scraping, the above wiper can realize the effect of removing rainwater on the windshield or removing dust and foreign matters on the windshield in a matched washing mode when the scraping blades scrape the windshield, but the two scraping forms have some defects.

The first and the above motion mechanisms can only realize that the motion trail on the front windshield is a fan-shaped motion trail, and because the front windshield is generally in a rectangular or trapezoidal form, and the front windshield can only be used as a fan-shaped scraping and brushing area by taking the output shaft as an original point, the effective area of the scraping and brushing whole glass is greatly limited, the scraping and brushing area is small and unsatisfactory, and the scraping and brushing can not reach an ideal state.

Secondly, the scraping and brushing area of the wiper blade of the traditional mechanism on the windshield is limited by the boundary of the front windshield decorative plate and the left and right A main parts, so that the wiping and brushing cannot be performed outside the fan-shaped area, and the maximum scraping and brushing area cannot be well realized.

Third, the upper wiper arm and blade normally rest in an inoperative position at the lowermost edge of the front windshield, near the edge of the trim panel. When limited by the shape, the wiper arm and the wiper blade are in some cases positioned on top of each other, which greatly affects the effect of the front downward view in the cab.

For the disadvantages of the above wiper, a new type of wiper for automobiles is needed to solve the above problems for the good development of automobile enterprises and for the improvement of automobile development.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an automobile wiper with a wiper blade capable of moving linearly during wiping.

In order to achieve the purpose, the invention adopts the technical scheme that:

the automobile wiper comprises a wiper blade, wherein the wiper blade is connected to a wiper arm, and the wiper arm is connected with a driving device for driving the wiper blade to move along a straight line.

The driving device comprises a motor for driving, and the motor is connected with a transmission assembly for driving the scraping arm to move along a straight line.

The transmission assembly comprises a first gear with inner teeth, which is arranged on a metal plate of the vehicle body, a second gear which is matched with the first gear and used for transmitting power is arranged inside the first gear, and a cylindrical pin used for driving the scraping arm to move is arranged on the second gear.

The driving device also comprises a speed reducing component which is arranged between the transmission component and the motor and used for reducing speed.

The speed reduction assembly comprises a worm connected with an output shaft of the motor, the worm is connected with a worm wheel used for transmission speed reduction, and a connecting assembly used for connecting the transmission assembly is arranged on the worm wheel.

The connecting assembly comprises a worm gear shaft arranged at the center of the worm gear, the worm gear shaft is connected with a connecting shaft arranged at the center of the second gear through a crank, and the crank is connected with the connecting shaft through a bearing.

The automobile wiper comprises a guide rail assembly used for guiding, the guide rail assembly comprises a fixed guide rail arranged on the first gear and used for guiding, and a groove used for a pin to penetrate through is formed in the fixed guide rail.

The groove comprises a kidney-shaped groove for the cylindrical pin to pass through and a first T-shaped groove for placing the sliding guide rail is arranged at the upper end of the fixed guide rail.

The guide rail assembly further comprises a sliding guide rail which is arranged on the fixed guide rail and is matched with the first T-shaped groove to be connected with the cylindrical pin, and a second T-shaped groove which is used for connecting the cylindrical pin is formed in the sliding guide rail.

And a pulley which is matched with the second T-shaped groove and is used for reducing the moving resistance of the cylindrical pin is arranged on the cylindrical pin.

The invention has the advantages that:

the invention changes the moving direction of the traditional automobile wiper, changes the fan-shaped movement of the traditional automobile wiper into the linear movement, and changes the defect that the traditional automobile wiper can only partially brush the front windshield through the linear movement of the wiper blade driven by the driving device, the wiping area of the front windshield can be increased through the linear movement of the wiper blade, the visible surface of the wiping glass is enlarged, and the traditional fan-shaped wiping surface is changed.

Drawings

The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is a cross-sectional view of the present invention.

Fig. 4 is a schematic structural view of a second gear in the present invention.

Fig. 5 is a perspective view of a second gear in the present invention.

Fig. 6 is a schematic view showing the structure of the slide rail according to the present invention.

Fig. 7 is a schematic structural view of a fixed rail according to the present invention.

Fig. 8 is a schematic diagram of the linear motion of the cylindrical pin on the second gear according to the present invention.

The labels in the above figures are:

1. the device comprises a motor, a worm 2, a worm 3, a worm wheel 4, a first gear 5, a bearing 6, a second gear 7, a fixed slide rail 8, a slide rail 9, an output shaft 10, a scraping arm 11, a scraping blade 12, a windshield 13, a turbine shaft 14, a crank 15, a cylindrical pin 16, a connecting shaft 17, a pulley 18, a second T-shaped groove 19, a first T-shaped groove 20 and a waist-shaped groove.

Detailed Description

The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.

The automobile wiper comprises a wiper blade 11, wherein the wiper blade 11 is connected onto a wiper arm 10, the wiper arm 10 is connected with a driving device for driving the wiper blade 11 to move along a straight line, and the wiper blade 11 and the wiper arm 10 move along the straight line through different driving devices, so that the defect of a traditional automobile wiper fan-shaped local wiping brush is overcome.

Example 1

A kind of car wiper, the car wiper includes doctor-bar 11, doctor-bar 11 connects on scraping the arm 10, scrape the arm 10 and connect with the drive unit used for driving doctor-bar 11 to follow the rectilinear motion, the drive unit includes the motor 1 used for driving, the motor 1 is connected with the drive assembly used for driving and scraping the arm 10 and following the rectilinear motion, the drive assembly includes setting up the first gear 4 with internal tooth on the sheet metal of car body, the inside of first gear 4 is equipped with the second gear 6 used for transmitting the power with the first gear 4 looks adaptation, equipped with the cylindrical pin 15 used for driving and scraping the arm 10 movement on the second gear 6, the drive unit also includes setting up the deceleration assembly used for decelerating between drive assembly and motor 1, the deceleration assembly includes the worm 2 connected with output shaft 9 of motor 1, the worm 2 is connected with the worm wheel 3 used for transmitting and decelerating, there is the coupling assembling used for connecting the drive assembly on the worm wheel 3, the connecting assembly comprises a worm wheel shaft 13 arranged at the center of the worm wheel 3, the worm wheel shaft 13 is connected with a connecting shaft 16 arranged at the center of the second gear 6 through a crank 14, the crank 14 is connected with the connecting shaft 16 through a bearing 5, the automobile wiper comprises a guide rail assembly for guiding, the guide rail assembly comprises a fixed guide rail 7 arranged on the first gear 4 and used for guiding, a groove for a pin to pass through is arranged on the fixed guide rail 7, the groove comprises a kidney-shaped groove 20 for the pin 15 to pass through and a first T-shaped groove 19 for placing the sliding guide rail 8 is arranged at the upper end of the fixed guide rail 7, the guide rail assembly also comprises the sliding guide rail 8 which is arranged on the fixed guide rail 7 and matched with the first T-shaped groove 19 and used for being connected with the cylindrical pin 15, a second T-shaped groove for being connected with the cylindrical pin 15 is arranged on the sliding guide rail 8, a pulley 17 which is matched with the second T-shaped groove and used for reducing the moving resistance of the cylindrical pin 15 is arranged on the cylindrical pin 15, the width dimension of the waist-shaped groove 20 is not less than the diameter dimension of the pin, the output shaft 9 for connecting the scraping arm 10 is arranged on the sliding guide rail 8, the scraping blade 11 can be driven by the driving device to do linear motion, the motor 1 here adopts the direct current permanent magnet motor 1, but because the rotating speed of the direct current permanent magnet motor 1 is too high, the worm 2 is transmitted to the worm wheel 3 to realize the speed reduction function, the worm wheel shaft 13 on the worm wheel drives the crank 14 to move, the crank 14 is connected with the connecting shaft 16 through the bearing 5, the motion of the connecting shaft 16 on the second gear 6 is driven by the motion of the crank 14, after the connecting shaft 16 is driven by the crank 14, the connecting shaft 16 drives the second gear 6 to rotate in the first gear 4, because the connecting shaft 16 is connected with the crank 14 through the bearing 5, when the second gear 6 rotates along the first gear 4, the cylindrical pin 15 can also rotate, the edge of the second gear 6 is provided with the cylindrical pin 15, the cylindrical pin 15 on the second gear 6 can linearly reciprocate along the fixed guide rail 7 by arranging the first gear 4 and the second gear 6, so that the cylindrical pin 15 can drive the sliding guide rail 8 to linearly move on the fixed guide rail 7, and the scraping arm 10 is connected with the sliding guide rail 8 through the output shaft 9, so that when the cylindrical pin 15 drives the sliding guide rail 8 to slide on the fixed guide rail 7, the scraping arm 10 is inevitably driven to linearly move through the continuous motion of the motor 1, meanwhile, the sliding guide rail 8 is arranged in the fixed guide rail 7, the cylindrical pin 15 is matched with a second T-shaped groove 18 on the sliding guide rail 8 through the pulley 17, the connection between the cylindrical pin 15 and the sliding guide rail 8 is realized, and the cylindrical pin 15 can rotate due to the assembly with the pulley 17, because the output shaft 9 used for fixing the wiper is welded on the sliding guide rail 8, and the two sides of the sliding guide rail 8 are limited by the two side rails of the fixed slide rail, the sliding guide rail 8 can not rotate in the inner rail of the fixed guide rail 7 any more, the sliding guide rail 8 linearly reciprocates along the direction of the fixed slide rail, the output shaft 9 is fixedly connected with the scraping arm 10, the scraping arm 10 is connected with the scraping blade 11 according to the traditional mode, the track of the linear motion of the sliding guide rail 8 can be finally realized according to the arrangement, namely the track of the reciprocating motion of the scraping arm 10 driving the scraping blade 11, and the scraping blade 11 is stably driven to scrape and brush the windshield 12 according to the set scraping track.

Example 2

The automobile wiper comprises a wiper blade 11, wherein the wiper blade 11 is connected to a wiper arm 10, the wiper arm 10 is connected with a driving device for driving the wiper blade 11 to move linearly, the driving device comprises a connecting shaft 16 for connecting with the wiper arm 10, the connecting shaft 16 is connected with a transmission belt, the transmission belt is connected with a transmission motor 1 for driving, and the transmission motor 1 is a two-way motor 1.

Preferably, the driving device comprises a motor 1 for driving, the motor 1 is connected with a transmission component for driving the scraping arm 10 to move along a straight line, the transmission component can be a link mechanism or a gear mechanism, the invention mainly performs transmission according to gears, the invention discloses a transmission component, the transmission component comprises a first gear 4 with internal teeth arranged on a vehicle body metal plate, a second gear 6 matched with the first gear 4 and used for transmitting power is arranged inside the first gear 4, a cylindrical pin 15 used for driving the scraping arm 10 to move is arranged on the second gear 6, the cylindrical pin 15 can be equivalent to one point on the second gear 6, the first gear 4 and the second gear 6 form a structure equivalent to a planet wheel, the axes of the first gear 4 and the second gear 6 are parallel, the first gear 4 and the second gear 6 are meshed with each other, the driving of the scraping arm 10 by the cylindrical pin 15 is realized through the power transmitted by the motor 1, and when the first gear 4 and the second gear 6 are designed into proper sizes, the cylindrical pin 15 on the second gear 6 can move along a straight line, and the specific principle is as follows:

in the internal meshing gear mechanism, the planet gear revolves around the center of the internal gear and rotates around the axis of the planet gear under the driving of the tie rod, and the movement is planar compound movement, so that a moving rod fixed on the planet gear also performs compound movement.

The principle of linear motion of the cylindrical pin 15 is realized:

setting the radius of an inner gear (a big circle) as R and the radius of an outer gear (a small circle) as R;

when designing a gear, the radius R of the internal gear is 2 times of the radius R of the external gear. The number of the inner gears is equal to 2 times of the number of the outer gears, so that any point on the pinion can move along a straight line. The principle is as follows:

in the initial position, point a represents the outer gear upper cylindrical pin 15, assuming that when the outer gear circle is rotated clockwise by an arbitrary angle α around point O (i.e., the circle Q moves to the circle Q 'in the drawing), the outer gear circle itself is rotated counterclockwise due to the gear engagement, and assuming that point a is operated to a', the outer gear circle is rotated by an angle γ. Wherein point B is the intersection point of the outer gear circle and OA; wherein, the point C is that any point on the inner gear is tangent with the outer gear;

the linear speeds are consistent due to the meshing of the two gears, so that the length of the large arc AC = the length of the small arc A' C;

major arc AC length = α R

Small circular arc a' C length = γ r

Since R =2R, the number of the electrodes,

so γ =2 α;

since Δ Q 'a' O is an isosceles triangle, γ =2 β

So α = β

Therefore, lines OA ' and OA are the same line, and A ' is on line OA (i.e. B is the same point as A ')

Because alpha is an arbitrary angle, the motion locus of the point a (the cylindrical pin 15) is a straight line and always on OE no matter what alpha is.

With the self-transmission of the outer dimension itself and the rotation around the internal gear, the travel path is always on the radius of the internal gear. The running paths are respectively A → O → E, and then the E → O → A circularly and linearly reciprocate.

Preferably, the driving device also comprises a speed reducing component arranged between the transmission component and the motor 1 and used for reducing speed, the speed reducing component has various types, can be a combination between a gear and a gear, and also can be a combination between a worm wheel 3 and a worm 2, the invention preferably adopts the speed reducing combination of the worm wheel 3 and the worm 2, the speed reducing component comprises the worm 2 connected with an output shaft of the motor 1, the worm 2 is connected with the worm wheel 3 used for driving and reducing speed, the worm wheel 3 is provided with a connecting component used for connecting the transmission component, the motor 1 is arranged on a sheet metal of a vehicle body, the motor 1 adopts a direct current permanent magnet motor 1, the motor 1 is provided with a motor 1 seat, the motor 1 seat is connected with the sheet metal through a bolt, an installation groove is manufactured on the motor 1 seat, one end of the output shaft of the motor 1 is directly connected with the worm 2 in the groove, the worm wheel 3 is installed in the installation groove of the motor 1, the motor 1 drives the worm wheel 3 to move through the worm 2, the worm wheel 3 actively drives the assembly to move through the connecting assembly, the connecting assembly comprises a worm wheel shaft 13 arranged at the center of the worm wheel 3, the worm wheel shaft 13 is connected with a connecting shaft 16 arranged at the center of the second gear 6 through a crank 14, the crank 14 is connected with the connecting shaft 16 through a bearing 5, and the crank 14 is connected with the connecting shaft 16 through the bearing 5.

Preferably, the automobile wiper of the present invention comprises a guide rail assembly for guiding, the guide rail assembly comprises a fixed guide rail 7 arranged on the first gear 4 for guiding, a groove for passing a pin is arranged on the fixed guide rail 7, the groove comprises a kidney-shaped groove 20 for passing a cylindrical pin 15 and a first T-shaped groove 19 for placing the sliding guide rail 8 is arranged at the upper end of the fixed guide rail 7, the guide rail assembly further comprises the sliding guide rail 8 arranged on the fixed guide rail 7 and matched with the first T-shaped groove 19 for connecting the cylindrical pin 15, the sliding guide rail 8 is provided with a second T-shaped groove for connecting the cylindrical pin 15, the arrangement is such that the movement of the wiper blade 11 provides a guiding device, firstly, the fixed guide rail 7 is matched with the sliding guide rail 8, so that the moving direction of the sliding guide rail 8 is limited, so that the sliding guide rail 8 can only move along the first T-shaped groove on the fixed guide rail 7, the wiper arm 10 is connected to the slide rail 8 via an output shaft 9, and the wiper blade 11 is necessarily moved linearly when the slide rail 8 is moved linearly.

Preferably, the guide rail assembly of the present invention further comprises a sliding guide rail 8 disposed on the fixed guide rail 7 and adapted to the first T-shaped groove 19 for connecting with the cylindrical pin 15, wherein the sliding guide rail 8 is provided with a second T-shaped groove for connecting with the cylindrical pin 15, the cylindrical pin 15 is provided with a pulley 17 adapted to the second T-shaped groove for reducing the moving resistance of the cylindrical pin 15, the second T-shaped groove is designed such that the movement of the cylindrical pin 15 is allowed to have a slight deviation, and because each part of the whole device is manufactured, some errors are inevitable, so in the present invention, the second T-shaped groove 18 is used for connecting with the cylindrical pin 15, and the direction of the second T-shaped groove 18 is perpendicular to the moving direction of the sliding guide rail 8, which can well avoid affecting the shaking of the cylindrical pin 15 in the direction perpendicular to the moving direction of the sliding guide rail 8, even if the moving direction of the cylindrical pin 15 is slightly deviated from the straight direction due to the manufacturing error, because cylindric lock 15 can be in second T shape inslot self-control, can not influence sliding guide 8's linear motion, simultaneously as bigger optimization, cylindric lock 15 is connected with second T type groove 18 through pulley 17, and the setting of pulley 17 has not only increased the stability that cylindric lock 15 is connected with sliding guide 8, also makes things convenient for the removal of cylindric lock 15 on sliding guide 8.

Preferably, the width dimension of the waist-shaped groove 20 is not less than the diameter dimension of the pin, the arrangement avoids the movement of the pin 15 deviating from the straight line due to the manufacturing error of each part in the device, even if the movement of the pin 15 deviates from the straight line slightly, the collision between the pin 15 and the fixed guide rail 7 can not occur because the width dimension of the waist-shaped groove 20 is not less than the diameter dimension of the pin, the arrangement avoids the collision probability between the pin 15 and the fixed guide rail 7, the service life of the device is prolonged, and the width of the waist-shaped groove 20 is required to be twice the diameter of the pin 15 in normal production.

Preferably, the output shaft 9 for connecting the scraping arm 10 is arranged on the sliding guide rail 8, the output shaft 9 is arranged to avoid the scraping arm 10 from being directly arranged on the sliding guide rail 8, and the output shaft 9 is equivalent to increase the height of the sliding guide rail 8, so that the installation is convenient.

Preferably, the automobile wiper comprises a regulation and control system for controlling the movement of the automobile wiper, the regulation and control system comprises a detection module, the detection module is connected with a control module for receiving a signal of the detection module, the control module is connected with an execution module, the detection module comprises a position sensor for identifying the position of the wiper blade 11, the detection module adopts a single chip microcomputer with a detection and identification function, and the single chip microcomputer can be a PIC single chip microcomputer, a PHILIS 51PLC series single chip microcomputer or a HOLTEK single chip microcomputer; the execution module is the power equipment such as the motor 1, in order to stop the scraping blade 11 at the A column position of the secondary driving side without keeping off the visual field, a position sensor is arranged at the position needing to stop, when the automobile wiper needs to be closed after being used, a signal is sent to the control module, the control module determines according to the signal transmitted by the detection module, when the automobile wiper is at the position where the automobile wiper wants to stop, the control module sends a non-starting instruction to the execution module, when the automobile wiper is not at the position where the automobile wiper needs to stop, the control module sends a signal to the driving motor 1, the motor 1 is started, and the automobile wiper is controlled to move to the corresponding position, so that the scraping arm scraping blade 11 stops off the visual field of the driver, and the effect of maximally scraping the windshield 12 can be achieved.

It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.

Claims

1. The automobile wiper comprises a wiper blade, wherein the wiper blade is connected to a wiper arm, and the wiper arm is connected with a driving device for driving the wiper blade to move along a straight line; the driving device comprises a motor for driving, and the motor is connected with a transmission assembly for driving the scraping arm to move along a straight line; the transmission assembly comprises a first gear with internal teeth, which is arranged on a metal plate of the vehicle body, a second gear which is matched with the first gear and used for transmitting power is arranged in the first gear, and a cylindrical pin used for driving the scraping arm to move is arranged on the second gear;

the automobile wiper comprises a guide rail assembly for guiding, the guide rail assembly comprises a fixed guide rail which is arranged on a first gear and used for guiding, and a groove for a pin to pass through is formed in the fixed guide rail;

the groove comprises a waist-shaped groove for the cylindrical pin to pass through and a first T-shaped groove for placing the sliding guide rail is arranged at the upper end of the fixed guide rail;

the guide rail assembly further comprises a sliding guide rail which is arranged on the fixed guide rail, is matched with the first T-shaped groove and is used for being connected with the cylindrical pin, and a second T-shaped groove used for being connected with the cylindrical pin is formed in the sliding guide rail;

the scraping arm is connected with the sliding guide rail through an output shaft;

the driving device also comprises a speed reducing component which is arranged between the transmission component and the motor and used for reducing speed;

a pulley which is matched with the second T-shaped groove and used for reducing the moving resistance of the cylindrical pin is arranged on the cylindrical pin;

the moving direction of the cylindrical pin in the second T-shaped groove is vertical to the moving direction of the sliding guide rail.

2. The automobile wiper according to claim 1, wherein the speed reducing assembly comprises a worm connected with an output shaft of the motor, a worm wheel for speed reduction is connected with the worm, and a connecting assembly for connecting the transmission assembly is arranged on the worm wheel.

3. The wiper blade of claim 2, wherein the connecting member includes a worm wheel shaft provided at a center of the worm wheel, the worm wheel shaft being connected to a connecting shaft provided at a center of the second gear through a crank, the crank being connected to the connecting shaft through a bearing.