RU1837023C - Device for adjusting slope of vehicle head-light - Google Patents

Abstract

Usage: in electric drives for adjusting the position of headlights of a vehicle. SUMMARY OF THE INVENTION: A device for adjusting the inclination of headlights of a vehicle comprises actuating piezoelectric motors 1 for each pair. The rod of the piezoelectric motor is pivotally connected to the turning headlight: 2. The piezoelectric motors are controlled by digital circuit 3. The piezoelectric motor consists of the upper part of the housing 5 with the landing elements, the lower part of jKopnyca 6, the bearing 7, the piezoceramic cylinder 8 of radial polarization, the pin 9. The geometric dimensions of the piezoceramic cylinder 8 are determined experimentally analytical method. For given constant values of the diameter and wall thickness of the piezoceramic cylinder, its height is a variable and determined experimentally by obtaining optimal working vibrations at the end of the piezoceramic cylinder, which provide a traveling wave mode, the optimal shape of which occurs at the end of the piezoceramic cylinder with respect to longitudinal vibrational frequencies to transverse, equal to two. A working ring 10 is rigidly fixed at the end of the piezoceramic cylinder in places of excitation of the highest amplitude of oscillation, an adapter base 13 is used to center the shaft. The power supply to the piezo-vibration motor is provided through connector 14. The signal about the number of revolutions of the working ring is taken from the sensor revolutions 15. The extreme position of the headlamp is determined by the information from the limit switch 16. Zil. (Л С 00 с VI о ю со

Description

FIELD OF THE INVENTION This invention relates to an electric drive for headlight range control.

 inventions increase reliability.

Ba FIG. 1 shows a headlamp leveling circuit; FIG. 2 shows a sectional view of a piezoelectric vibrator: FIG. 3

-functional control circuit of piezoelectric vibrators.

The device for adjusting the inclination of the headlights of the vehicle comprises actuating piezoelectric motors 1 for each headlight. The rod of the piezoelectric motor is pivotally connected to the rotatable headlight 2. The piezo-vibrator motors are controlled by a digital circuit 3. The controls 4 are located on the front panel of the car.

The piezoelectric motor consists of the upper part of the housing 5 with landing elements, the lower part of the housing b, the bearing 7, the piezoceramic cylinder 8 of radial polarization, the pin 9. The geometric dimensions of the piezoceramic cylinder 8 are determined by the experimental-analytical method. For given constant values of the diameter and wall thickness of the piezoceramic cylinder, its height is a variable and is experimentally determined for. obtaining at the end of the piezoceramic cylinder optimal operating vibrations providing a traveling wave regime, the optimum shape of which occurs at the end of the piezoceramic cylinder with a longitudinal to transverse vibrational frequency ratio of two. At the end of the piezoceramic cylinder, in the places of excitation of the highest amplitude of oscillation, the working ring 10 is rigidly fixed to the end of the flange 11, mounted on the cone of the shaft 12. To center the shaft, an adapter base 13 is used. RPM sensor .15. Headlight extreme position Determined by information from limit switch 16.

The digital control circuit of the piezoelectric motors consists of two identical channels 17. Each channel consists of a reversible counter of the number of revolutions of the piezoelectric motors 1, a register of the position code of the control, a device for comparing two codes, electric oscillation generators supplying the piezoelectric motors.

In addition, the digital control circuitry contains blocks common to two channels: a control position encoder and an initial trigger unit. The control circuit has inputs for receiving signals from the speed sensor 15 and from the limit switch 16 of each piezo motor.

A device for adjusting the position of the headlights operates as follows.

By control 4, the driver sets the desired headlight position. The position encoder of the control provides a code that is written to the position code registers of the & channels. From the output of the registers, the signals are sent to a code comparison device. The code comparison device also receives a code for the current position of the rod of the piezo-vibration motor, which is located in the reverse counter of the number of revolutions. The code comparison device compares the received codes and provides control signals to high

frequency. High-frequency signals from the generators are fed through the connectors 14 of the piezoelectric motors to the distributed electrodes of the piezoceramic cylinder, causing a traveling wave to drive the end of the piezoceramic cylinder, which drives the flange 11 and through the worm gear shaft 12. The direction of movement of the shaft 12 is determined by the control signal from the device code comparisons. As the flange 11 rotates, the signal from the speed sensor enters the reversible speed counter. If the required and current headlight codes are equal, the control signal from the comparator

blocks the operation of high-frequency generators. Flange rotation stops. The control circuit is not disconnected from the vehicle electrical system and is constantly ready for operation.

When applying power to a digital circuit

For control 3, signals from high-frequency generators are fed through connector 4 to the distributed electrodes of the piezoceramic cylinder, and the flange 11 begins to rotate, extending the piezo-vibrator motor shaft. As a result of this, the headlamp is turned to the extreme position until the limit switch located on the vibration motor trips. As a result

when the switches are operated, the reversing speed counters are set to the zero state, and the position code of the control knob is recorded in the position register of the control. Shaft 12

the piezoelectric motor comes into translational motion by setting the headlights in the position specified by the control handle.

Device for adjusting the inclination of the headlights of a vehicle with a drive,

having a piezoceramic cylinder and using the traveling wave effect that occurs at its end, it is much simpler, smaller in size and has greater stability compared to

similar devices.

Claims (1)

SUMMARY OF THE INVENTION A device for adjusting the inclination of headlights of a vehicle, comprising an actuator mechanically coupled to an adjustable headlamp, a adjuster and an angle sensor, a limit switch mechanically connected to the movable part of the actuator, and a comparison unit, encoder position encoder rotation angle, position code register, reversible counter, initial installation unit, and a high-frequency signal generator, the executive motor is made vibrating, the control inputs of which are connected to the outputs of the high-frequency signal generator, the inputs of which are connected to the outputs of the unit compared to: none, the information inputs of which are connected respectively, to the outputs of the reversible counter and register of the position code, the inputs of which are connected to the rotary angle adjuster and the position encoder rotary angle encoder, the input of the initial setpoint unit is connected to the limit switch, and the output is to the installation inputs of the position code register and the reverse counter, the control and information inputs of which are connected respectively to the output of the comparison unit and the angle sensor, distinguishing with In order to increase reliability, the vibroengine contains a hollow piezoelectric ceramic cylinder with distributed electrodes, the height of which is proportional to the ratio of the frequencies of the longitudinal oscillations to the radial ones, equal to two. fern about p- | G L. I V5 L J