CN106314377A - Dead-angle-free automobile windscreen wiper device - Google Patents

Abstract

The invention discloses a dead-angle-free automobile windscreen wiper device. The dead-angle-free automobile windscreen wiper device comprises a main windscreen wiper brush, an auxiliary windscreen wiper brush, a transmission gear, a servo motor, a servo motor controller and an optical-electricity encoder. The main brush is of a hollow structure and arranged on an automotive front windshield; the auxiliary brush is arranged on an inner cavity in the main brush and can stretch out or retract; the transmission gear is connected with an insection on the auxiliary brush and used for stretching and retracting the auxiliary brush; the servo motor is connected with the transmission gear and used for driving the transmission gear and further stretching and retracting the auxiliary brush; the optical-electricity encoder can detect the rotating angle of the main brush and transmits the rotating angle to the servo motor controller, the servo motor controller controls the rotating state of the servo motor according to the rotating angle of the main brush accordingly, and therefore correct stretching and retracting opportunities and the stretching and retracting quantities of the auxiliary brush are determined. By means of the dead-angle-free automobile windscreen wiper device, the covering area of the windscreen wiper can be greatly improved; as automatic ring-opening stretching and retracting control is adopted, the stability of the performance is guaranteed, and the dead-angle-free automobile windscreen wiper device can be widely applied to automotive front-window windscreen wipers with various shapes.

Description

A car wiper device without dead angle

technical field

The invention belongs to the technical field of automobiles, and more specifically relates to an automobile wiper device whose length is automatically changed according to the wiper angle.

Background technique

Wipers, also known as wipers, water dials, wipers or windshield wipers, are devices used to wipe off raindrops and dust attached to the windshield of vehicles to improve the visibility of drivers and increase driving safety. Especially in the harsh environment, rainwater and stains cover the front window of the car, which will have a great impact on the driver's line of sight. At this time, the wiper is particularly important. However, the coverage of most of the current wipers is semicircular, and the front window of a car is generally trapezoidal, so there is a dead angle that the wiper cannot clean, thereby affecting the driving safety of the vehicle.

Contents of the invention

Aiming at the defects of the prior art, the object of the present invention is to provide an automobile wiper device whose length can be automatically changed according to the wiper angle, aiming at solving the problem of cleaning dead spots in the existing wiper.

A car wiper device without dead angle provided by the present invention includes a main brush, an auxiliary brush, a transmission gear, a servo motor, a servo motor controller and a photoelectric encoder; wherein:

The main brush is installed on the front windshield of the automobile, and a brush is provided on the side contacting the glass; the inside of the main brush is a cavity structure for installing the auxiliary brush;

The auxiliary brush is installed in the cavity structure of the main brush, which is a brush strip structure shorter than the main brush; the root of the auxiliary brush is provided with a rack for meshing with the transmission gear, which can be driven by the transmission gear. down, protruding from the main brush or shrinking into the main brush;

The transmission gear is installed on the rotating shaft of the servo motor and rotates under the drive of the servo motor; the transmission gear meshes with the gear of the auxiliary brush and is used to stretch the auxiliary brush;

The rotating shaft of the photoelectric encoder is coaxially fixed with the rotating shaft of the main brush, and is used to collect the rotation angle state of the main brush; its output is connected to the servo motor, and is used to transmit the angle signal of the main brush;

The servo motor is installed at the shaft of the main brush, including a motor and a controller, the motor is used to drive the transmission gear to rotate; the controller is connected with the motor and the photoelectric encoder, and receives the main brush angle signal from the photoelectric encoder , to output forward rotation, reverse rotation or stop rotation instructions to the motor, so as to precisely control the extension and contraction of the auxiliary brush;

When working, the main brush rotates and drives the shaft of the photoelectric encoder at the same time. The photoelectric encoder outputs the angle status information of the main brush to the servo motor controller. The controller collects the angle information and processes it, and calculates the corresponding angle. , the controller issues an extension command, the servo motor drives the transmission gear to extend the auxiliary brush to clean the dead corner; when the main brush leaves the glass dead corner, the controller sends a contraction command, and the servo motor drives the gear to retract the auxiliary brush.

Further, the servo motor controller pre-records the corresponding relationship between the rotation angle of the main brush and the required expansion and contraction length of the auxiliary brush.

Further, the photoelectric encoder implements information transmission with the servo motor controller through the RS485 communication protocol.

Further, the main brush is made of carbon fiber material

Compared with the prior art, the technical solution proposed by the invention can greatly increase the cleaning area ratio of the wiper, reduce the blind spot of the driver's sight in rainy days, and further improve the driving safety of the car in rainy days.

Description of drawings

Fig. 1 is a schematic diagram of an automobile wiper device that automatically changes the length according to the wiper angle provided by the embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a wiper blade provided by an embodiment of the present invention;

Fig. 3 is a schematic diagram of the extension of the wiper auxiliary brush provided by the embodiment of the present invention;

Fig. 4 is a schematic diagram showing the shortening of the wiper auxiliary brush provided by the embodiment of the present invention;

Wherein, 1 is the overall structure of the wiper without dead angle, 201 is the main brush, 202 is the auxiliary brush, 203 is the gear, 204 is the servo motor, 205 is the servo motor controller, 206 is the photoelectric encoder, 207 is the windshield.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The automobile wiper device (hereinafter referred to as the wiper as shown in Figure 1) that automatically changes the length according to the wiper rotation angle detects the rotation angle θ of the main brush in real time during operation, and then according to the corresponding relationship between θ and R, the corresponding relationship can be obtained through actual measurement. Yes, control the servo motor to rotate at a certain angle, so that the secondary brush protrudes and approaches the edge of the windshield. The corresponding relationship between θ and R can be measured and stored in the controller through experiments. This allows the wipers to act on all areas of the windscreen.

The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

In the embodiment of the present invention, the structural block diagram of the wiper is shown in Figure 2. The main brush is installed on the fixed shaft, and the encoder is installed coaxially with the fixed shaft. The rotation of the main brush can drive the rotation of the encoder, and the auxiliary brush is installed on the main shaft. On the groove of the brush, the controller is installed in the control box. The control box can be installed on the rotation shaft of the main brush. The controller detects the rotation angle of the main brush in real time by communicating with the photoelectric encoder, and then controls the servo motor to rotate at a certain angle. The motor drives the auxiliary brush through the gear, so that the auxiliary brush expands and contracts, wherein the servo motor is also installed on the rotating shaft of the main brush. Specific steps are as follows:

Step 1: As shown in Figure 3, when the wiper rotates diagonally, in order to make the auxiliary brush close to the edge of the windshield, the servo motor rotates clockwise, and the auxiliary brush is extended, and the extended distance is from the previous one. The corresponding relationship between θ and R is determined;

Step 2: As shown in Figure 4, when the wiper rotates toward the bottom, according to the position of the sensor, in order to prevent the auxiliary brush from touching the edge of the windshield, the servo motor rotates counterclockwise, and the auxiliary brush shrinks. The length is determined by the correspondence between the previous θ and R.

The rotation angles of all the servo motors are in correspondence with the rotation angle θ of the wiper, and this correspondence can be directly tested and stored in the controller.

Those skilled in the art can easily understand that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention, All should be included within the protection scope of the present invention.

Claims (4)

1. one kind without dead angle vehicle wiper device, it is characterised in that include main brush (201), secondary brush (202), travelling gear (203), servomotor (204), servomotor controller (205) and photoelectric encoder (206)；Wherein:

Described main brush (201) is arranged on automobile front windshield, and the one side of its contact glass is provided with hairbrush；Main brush is internal is cavity Structure, is used for installing secondary brush；

Described secondary brush (202) is arranged in the cavity structure of described main brush, and it is the brush list structure that more main brush is short and small；Secondary brush Root is provided with tooth bar, for engaging with travelling gear, can stretch out or shrink in main brush under the driving of travelling gear in main brush In；

Described travelling gear (203) is arranged in the rotary shaft of servomotor, rotates under the drive of servomotor；Travelling gear It is meshed with the gear of pair brush, is used for the described secondary brush that stretches；

Described photoelectric encoder (206) rotating shaft is fixed with main brush rotating shaft coaxle, is used for gathering main brush rotational angle state；It is defeated Go out and connect described servomotor, be used for transmitting main brush angle signal；

Described servomotor (204) is arranged at main brush rotating shaft, and including motor and controller, motor is used for driving described driving cog Wheel rotates；Described controller is connected with motor and photoelectric encoder, receives the main brush angle signal that photoelectric encoder transmits, to electricity Machine output forward, reverse or stop turn instruction, thus accurately control stretching out and shrinking of pair brush；

During work, main brush drives photoelectric encoder rotating shaft simultaneously when rotating, and photoelectric encoder exports main brush angle state information and arrives Servomotor controller, controller acquisition angles information also processes, and respective angles resolved, when main brush is dead close to glass Angle, controller sends elongation instruction, and driven by servomotor travelling gear stretches out secondary brush, it is achieved the cleaning to dead angle；When main brush from When opening glass dead angle, controller sends contraction instruction, and pair brush regained by driven by servomotor gear.

2. windscreen wiper device as claimed in claim 1, it is characterised in that the pre-recorded described master of described servomotor controller The anglec of rotation of brush and the corresponding relation of the described required collapsing length of secondary brush.

3. as claimed in claim 1 without dead angle vehicle wiper device, it is characterised in that described photoelectric encoder passes through RS485 communication protocol and described servomotor controller realize information transmission.

4. as claimed in claim 1 without dead angle vehicle wiper device, it is characterised in that described main brush is by carbon fibre material system Become.