SU934285A1 - Device for setting optimum mutual position of toothed wheels - Google Patents

Description

(54) DEVICE FOR INSTALLING OPTIMAL MUTUAL POSITION OF TOOTH WHEELS

one

The invention relates to mechanical engineering, in particular to testing equipment, and can be used in the manufacture and quality control of gears, as well as in adjusting their relative position .5

A known machine for testing gears and measuring noise has a drive mechanism with an engine equipped with a reversing device, which is associated with a device for measuring the noise level, a reciprocating movement of a small pinion gear when searching for and determining its position (spindle), corresponding to the minimum noise level, and an indicator mechanism indicating the axial position 15 of the small pinion gear 1.

A disadvantage of the known machine is that when searching for the optimal one. It is necessary to move it over the entire range of permissible displacements, which leads to unproductive time.

The closest to the invention in technical essence and the achieved positive effect is a device for setting the optimum relative position of gear wheels, containing converters of the angular position and vibration of gear wheels into an electrical signal and connected to the latter synchronous filter 2.

A disadvantage of the known device lies in the considerable time spent on finding the optimal mutual position of gear wheels due to the need to move one of the wheels in the entire range of allowable displacements when checking all minimum harmonic levels.

The purpose of the invention is to reduce the installation time of the relative position of the wheels.

This goal is achieved by the fact that the device is equipped with a testing mechanism designed for reciprocal action with one of the gears, a control unit connected in series with it, a comparator unit and an engagement phase meter, which is connected to a synchronous filter, and a phase adjuster associated with the comparator unit, and the angular position transducer is connected to a synchronous filter and to a phase meter.

The drawing shows a block diagram of the device.

The device for optimizing the relative position of the gears comprises a series-connected oscillation converter 1 of gear wheels 2 and 3 into an electrical signal, a synchronous filter 4, a phase meter 5, a comparison block 6, a control unit 7 and a test mechanism 8 interacting with the wheel 3, as well as Converter 9 of the angular position of the wheels 2 and 3 into an electrical signal, the sensitive part of which is connected with the teeth of the gear wheel 2, and the output is connected to the second inputs of the synchronous filter 4 and the phase meter 5, and the setpoint generator 10 s, the output of which is connected to the second input of the comparison unit 6.

The device is designed to work with a rolling machine or with a bench for testing gears that have a drive and a loading wheel loading wheel (not shown), as well as an indicator showing the amount of displacement or wheel alignment coordinate (not shown).

The device works as follows.

We consider the device operation by the example of optimization of the assembly distance of the leading pinion of the main pair of the rear axle reduction gear of the car during the test. A pair of gears, for example, 2 and 3, which is a reference, is mounted on a machine with a nominal mounting distance, the sensitive part of the inductive transducer 9 of the angular position is attached to the base of the machine in close proximity to the ends of the gear teeth 2, the oscillation transducer 1 is also positioned on the frame or on the bearing of the driven machine spindle, then rotate the wheels 2 and 3 with the required speed and load during the entire optimization process. In order to calibrate the device, rotate a pair of gears 2 and 3 manually and determine the optimum axial position of the gear 3 according to the contact spot on the reference pair, and the first harmonic of the frequency of the overvoltage is extracted from the signal from the oscillator 1 to the synchronous filter 4 teeth, is equal to the frequency of the teeth passing relative to the sensitive part of the transducer 9 angular position, the signal from the output of which controls the setting of the synchronous filter 4. A sinusoidal signal from the output of the filter 4 enters t on the phase meter 5, in which the phase., the vibration signal relative to the pulses arriving at its second input from the output of the angular position transducer 9, is converted into a constant voltage, which is supplied to the comparison unit 6, to the second input

which, from the output of the rear end of the phase 10, receives a constant voltage corresponding to the optimum mutual arrangement and equal to the average value of the phase in the range of possible phase changes for different gears. The angular position of the sensitive part of the transducer 9 is changed, turning it relative to the axis of the driven wheel 2, while achieving equal measurement of the phase value at the output of the phase meter 5 and the voltage at the output of the unit 10, the permissible phase value, where the calibration process ends. Instead of the reference pair, the tested one is set without changing the position of the transducers 1 and 9, and rotated at the same speed and load as the reference pair, the measured phase value is compared in comparison block 6 with the allowable value, and the difference signal from its comparison output goes control unit 7, in which the direction and magnitude of the required displacement of the drive gear 3 along its axis is determined. The dependence of the magnitude of the displacement on the phase value is determined at the stage of debugging the optimization technology of a particular type of main pair. The control signal from the output of the control unit 7 is fed to the actuator 8, which changes the mounting distance. The process of measuring and adjusting the mounting distance continues until the phase values are set equal to the allowable value with a given accuracy, which is also determined for a particular type of optimization technology that is the main one at the debugging stage. At the end of the optimization process, the mounting distance of the main pair is determined at the machine’s click, and in control unit 7 a signal is generated that stops running-in. In case the optimization has not occurred within a predetermined time, in block 7 of the control, a run-in termination signal is generated, and the sign of rejecting the main pair is induced.

Such a design of the device provides automatic B3aHJviHoe movement of the gear wheels until the desired phase of the first harmonic of the teeth engagement frequency is obtained, which corresponds to the optimum positioning of the wheels with a given contact spot, thereby reducing the time for setting their optimum relative position.

Claims (1)

1. Patent of Germany No. 1777445, cl. G 01 M 13/02, 1977. 2 USSR Author's Certificate in Application No. 2719190 / 25-28, cl. G 01 M 13/02, 1979 (prototype).