CN111231836A

CN111231836A - Telescopic automobile rearview mirror wiper

Info

Publication number: CN111231836A
Application number: CN202010242887.0A
Authority: CN
Inventors: 施卫; 夏涛; 万广轩; 张晨; 蒋龙
Original assignee: Jiangsu University of Technology
Current assignee: Jiangsu University of Technology
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-06-05

Abstract

The invention discloses a telescopic automobile rearview mirror windscreen wiper which comprises a rearview mirror shell, a rearview mirror and a windscreen wiper, wherein the windscreen wiper is connected with a motor shaft of a motor arranged in a rearview mirror through a rotating shaft sleeve, the motor is connected with an in-vehicle microcontroller through a wire harness, the windscreen wiper comprises an external windscreen wiper and an internal windscreen wiper, the internal windscreen wiper is arranged in the external windscreen wiper and can be telescopic relative to the length direction of the external windscreen wiper, the inner side end of the internal windscreen wiper is connected with a spring baffle plate in the external windscreen wiper through a spring, the outer side end of the internal windscreen wiper is provided with balls, communicated ball sliding grooves are formed in the bottom surface of the inner side of the rearview mirror shell and the curved surface of one side, far away. The rearview mirror wiper disclosed by the invention is controlled by the motor to rotate to finish the wiping process, and the degree of automation is high; the built-in windscreen wiper is telescopic, so that the wiping range of the windscreen wiper can cover most of mirror surfaces, the wiping effect is good, and the driving safety is guaranteed.

Description

Telescopic automobile rearview mirror wiper

Technical Field

The invention relates to the technical field of automobile manufacturing, in particular to a telescopic automobile rearview mirror windscreen wiper.

Background

The outer rearview mirror is an important accessory on an automobile, and is mainly used for a driver to observe and master the driving condition of the automobile behind in the driving process and guarantee driving safety.

However, when the automobile runs in rainy and snowy days, rainwater often falls on the mirror surface of the external rearview mirror, so that the observation of drivers is not facilitated, and many drivers can continuously stretch hands to the outside of the automobile and wipe the rainwater on the rearview mirror with towels, so that the driving danger is greatly increased.

Although the rear-view mirror of the car that has many models now all has the function of heating, can deal with the emergence of this kind of condition to a certain extent automatically, meet heavy rain weather, heating system just can not be timely evaporates the rainwater futilely, and often can leave the watermark on evaporating the dry mirror surface, influences the definition of mirror surface, and the driver can not be timely accurate know the specific trend of rear vehicle, drives for driver's rainy day and brings very big puzzlement, also can bring the potential safety hazard for driving.

At present, some rearview mirror structures with a windscreen wiper are disclosed in related patents, but some rearview mirror structures are pure mechanical structures, the windscreen wiper needs to be manually operated to wipe, and convenience and operability need to be improved; motor control's wiper structure has greatly improved the mobile convenience, but the rear-view mirror wiper among the prior art generally can not carry out multistage speed governing, and the wiper cleans the scope and can not cover most mirror surface, has the clearance dead angle, and area of field is limited, causes the potential safety hazard easily.

Disclosure of Invention

In order to solve the problems, the invention provides the telescopic automobile rearview mirror windscreen wiper which is simple in structure, convenient and fast to use, comprehensive in wiping and capable of greatly improving the safety of a driving process.

In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme: a telescopic automobile rearview mirror wiper comprises a rearview mirror shell, a rearview mirror and a wiper, wherein a lens frame for mounting the rearview mirror is arranged on the rearview mirror shell, the rearview mirror is mounted in the rearview mirror shell through the lens frame, the wiper is arranged on the edge of one side of the lens, one end of the wiper is connected to a rotating shaft sleeve, the rotating shaft sleeve is connected with a motor shaft of a motor arranged in the rearview mirror, the wiper comprises an external wiper and an internal wiper, the internal wiper is arranged in the external wiper and can extend and retract in the length direction of the external wiper relative to the external wiper, a spring baffle is arranged at one end close to the rotating shaft sleeve in the external wiper, the inner side end of the internal wiper is connected with the spring baffle through a spring, balls are arranged at the outer side end of the internal wiper, and communicated ball chutes are arranged on the bottom surface of the inner side of the rearview mirror shell and the curved surface, the ball is connected in the ball spout and can follow the ball spout and slide.

Further, the motor is connected with an in-vehicle microcontroller through a wire harness.

Furthermore, a Freescale single chip microcomputer is used as a microcontroller, the chip is MC9S12XS128, an H-bridge power chip MC33887 is used for controlling the forward rotation, the reverse rotation and the rotating speed of the motor, the rotation direction is controlled by setting the high and low levels of an IO port, and the rotating speed is controlled by adjusting the PWM duty ratio value.

Furthermore, the PWM7 and the PWM3 of the MC9S12XS128 are respectively used as input control ends of pins IN1 and IN2 of the MC33887, and then the feedback current signal of the MC33887 is sampled through the connection between the AD00 module and the FB pin of the MC9S12XS128, so that the high-side working current value of the H bridge is monitored IN real time; the pin D1 and the pin D2 are respectively connected to GND and 5V through a pull-down resistor and a pull-up resistor, so that output control of OUT1 and OUT2 can be completed, and control of positive and negative rotation and rotation speed of the motor is finally achieved.

The invention has the beneficial effects that:

1. the rearview mirror windscreen wiper disclosed by the invention is controlled by the motor to rotate to finish the wiping process, is high in mechanicalness, can automatically wipe rainwater and dust on a rearview mirror, and improves the driving safety;

2. the built-in windscreen wiper can stretch out and draw back in the length direction relative to the external windscreen wiper, so that the wiping range can cover most of mirror surfaces, the wiping and cleaning efficiency is high, a driver can know the moving direction of a rear vehicle in real time, and the driving safety is guaranteed.

3. The motor is intelligently controlled by the single chip microcomputer, the stability of the system is improved, the rotating speed of the motor is convenient to adjust, and several stages of speed regulation can be set to adapt to rainwater weather of different degrees.

Drawings

Fig. 1 is a front view of a retractable vehicle mirror wiper blade;

fig. 2 is a side view of a retractable vehicle mirror wiper blade;

FIG. 3 is a schematic diagram of a motor drive section;

wherein, the rearview mirror comprises 1-a rearview mirror shell, 2-a rearview mirror, 3-a windscreen wiper, 4-a rotating shaft sleeve, 5-a motor and 6-a motor shaft;

31-external windscreen wiper, 32-internal windscreen wiper, 33-spring baffle, 34-spring and 35-ball.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.

In order to effectively clean the surface of an automobile rearview mirror in rainy and snowy weather and ensure driving safety to the maximum extent, the invention discloses a telescopic automobile rearview mirror wiper which has the specific structure shown in figure 1-2 and comprises a rearview mirror shell 1, a rearview mirror 2 and a wiper 3, wherein a lens frame for mounting the rearview mirror 2 is arranged on the rearview mirror shell 1, the rearview mirror 2 is mounted in the rearview mirror shell 1 through the lens frame, the wiper 3 is vertically arranged at the edge position on the left side of the lens in an initial state, the top end of the wiper 3 is connected onto a rotating shaft sleeve 4, the rotating shaft sleeve 4 is connected with a motor shaft 6 of a motor 5 arranged in the rearview mirror 2 so as to drive the wiper 3 to rotate through the motor 5, and the motor 5 is connected with an in-vehicle microcontroller through a wiring harness.

The wiper 3 comprises an external wiper 31 and an internal wiper 32, the internal wiper 32 is arranged in the external wiper 31 and can extend and retract relative to the external wiper 31 in the length direction, a spring baffle 33 is arranged at one end, close to the rotating shaft sleeve 4, in the external wiper 31, the inner side end of the internal wiper 32 is connected with the spring baffle 33 through a spring 34, a ball 35 is arranged at the outer side end of the internal wiper 32, a communicated ball chute is arranged on the bottom surface of the inner side of the rearview mirror shell 1 and a curved surface at one side far away from the wiper 3, (the ball chute is designed along the running process of the wiper 3, the wiper 3 is at the initial position when the ball 35 is positioned at the left side end of the ball chute, and the wiper is at the one-way end position when the ball 35 is positioned at the right side end of the ball chute).

Because the ball 35 moves along the ball chute all the time, the position of the ball is relatively fixed in the direction vertical to the lens, namely the ball moves in the same plane all the time, and the other end of the wiper is fixed, the ball can also play a role in limiting the movement of the wiper 3 in the vertical direction, and the wiper blade on the inner side of the wiper is attached to the mirror surface all the time to move, so that the wiping effect is ensured.

In order to achieve a good motor control effect, a fiincar singlechip is selected as a microcontroller in the embodiment, the chip selects MC9S12XS128, an H-bridge power chip MC33887 is selected to control the forward rotation, the reverse rotation and the rotating speed of the motor, the rotation direction is controlled by setting the high and low levels of an IO port, and the rotating speed is controlled by adjusting a PWM duty ratio value, so that the forward rotation and the reverse rotation of the windscreen wiper can be controlled and the rotating speed can be adjusted.

Fig. 3 is a schematic diagram of the motor driving, as shown, the PWM7 and PWM3 of the MC9S12XS128 are respectively used as the input control terminals of the IN1 and IN2 pins of the MC33887, and then the feedback current signal (FB pin) of the MC33887 is sampled by the AD00 module of the MC9S12XS128, so as to monitor the high-side operating current value of the H-bridge IN real time; the D1 (pin 18) and the D2 (pin 13) are respectively connected to GND and 5V through a pull-down resistor and a pull-up resistor, so that the output control of OUT1 (pin 6 and 7) and OUT2 (pin 14 and 15) can be completed, and the forward and reverse rotation of the motor and the control of the rotating speed are realized.

The method comprises the steps of writing a c code program through Freescale codeWarrior, adjusting a PWM duty ratio value to determine different rotating speeds, and setting different rotating periods, wherein one rotating period comprises a reciprocating process, namely the time required for rotating the windscreen wiper from the initial position of the windscreen wiper shown in figure 1 to the right to the top to be horizontal and then reversing the windscreen wiper from the top to the initial position. A time delay program can be arranged between two running periods of the windscreen wiper, so that the windscreen wiper can stop for a period of time when rotating back and forth once, and then rotate the windscreen wiper next time. And then downloading the programmed program to a singlechip for debugging.

The specific working process is as follows:

after the motor is started and powered on, the microcontroller controls the motor 5 to be started, the motor 5 rotates forwards at first, the external windscreen wiper 31 starts to rotate rightwards along with the rotation of the motor shaft 6, the balls 35 roll along the ball sliding grooves, and the internal windscreen wiper 32 extends outwards from the bottom of the external windscreen wiper 31 under the dual effects of the pulling force of the balls 35 and the pushing force of the spring 34 along with the increase of the wiping radius, so that the wiping range of the windscreen wiper 3 can cover the mirror surface;

after the inner wiper 32 extends to the farthest distance, the inner wiper 32 contracts inward under the elastic restoring force of the spring 34 and the pushing restriction of the balls 35 as the wiping radius decreases;

when the balls 35 reach the uppermost end position on the right side of the ball chute, one-way wiping is completed, and at the moment, the motor 5 starts to rotate reversely, so that the wiper 3 performs return rotation;

when the windscreen wiper is rotated back to the initial position, due to the arrangement of the time delay program, the windscreen wiper 3 can rotate for the next period at intervals;

the external windscreen wiper 31 rotates back and forth along with the motor 5, the internal windscreen wiper 32 performs back and forth telescopic motion relative to the external windscreen wiper 31, and the motor 5 rotates forward and backward continuously to drive the windscreen wiper 3 to rotate back and forth, so that rainwater and dust on the mirror surface are wiped in real time, a driver can observe the moving direction of a rear vehicle in real time, and the driving safety is improved.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A telescopic automobile rearview mirror wiper is characterized by comprising a rearview mirror shell (1), a rearview mirror (2) and a wiper (3), wherein a mirror frame for mounting the rearview mirror (2) is arranged on the rearview mirror shell (1), the rearview mirror (2) is mounted in the rearview mirror shell (1) through the mirror frame, the wiper (3) is arranged on the edge of one side of the mirror, one end of the wiper (3) is connected onto a rotating shaft sleeve (4), the rotating shaft sleeve (4) is connected with a motor shaft (6) of a motor (5) arranged in the rearview mirror (2), the wiper (3) comprises an external wiper (31) and an internal wiper (32), the internal wiper (32) is arranged in the external wiper (31) and can be telescopic in the length direction of the external wiper (31), a spring baffle (33) is arranged at one end, close to the external wiper (31), in the external wiper (31), the inner side end of the built-in windscreen wiper (32) is connected with the spring baffle (33) through a spring (34), a ball (35) is arranged at the outer side end of the built-in windscreen wiper (32), a communicated ball sliding groove is formed in the bottom surface of the inner side of the rearview mirror shell (1) and the curved surface of one side far away from the windscreen wiper (3), and the ball (35) is connected in the ball sliding groove and can slide along the ball sliding groove.

2. A retractable vehicle mirror wiper as claimed in claim 1, characterized in that the motor (5) is connected to the vehicle microcontroller via a wiring harness.

3. The retractable vehicle rearview mirror wiper as claimed in claim 2, wherein said microcontroller is a fiincar single chip microcomputer, said chip is MC9S12XS128, said H-bridge power chip is MC33887 for controlling the forward rotation, reverse rotation and rotation speed of said motor, the rotation speed is controlled by setting the high and low levels of said IO port, and said rotation speed is controlled by adjusting the PWM duty ratio.

4. The retractable rearview mirror wiper blade as claimed IN claim 3, wherein PWM7 and PWM3 of MC9S12XS128 are respectively used as input control terminals of IN1 and IN2 pins of MC33887, and then feedback current signals of MC33887 are sampled through connection of an AD00 module and an FB pin of the MC9S12XS128, so that high-side working current values of the H bridge are monitored IN real time; the pin D1 and the pin D2 are respectively connected to GND and 5V through a pull-down resistor and a pull-up resistor, so that output control of OUT1 and OUT2 can be completed, and control of positive and negative rotation and rotation speed of the motor is finally achieved.