SU934194A1 - Device for checking key slots on shafts - Google Patents

Description

(54) DEVICE TO CONTROL SPETITAL CALVES

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The invention relates to a measurement technique, namely, devices for monitoring the displacement and skew of keyways with respect to the shaft.

A known device for controlling keyways on the shafts, comprising a housing with a clamping prism, an insert installed in the housing along the bisector of the prism angle, and two readout assemblies mounted in the housing {1.

The disadvantage of the known is that it. designed to control grooves on shafts of the same diameter.

The purpose of the invention is to expand the range of controlled shaft diameters.

This goal is achieved by the fact that the device for testing key grooves on the shafts is equipped with measuring tips installed in housing grooves on plane-parallel springs: parallel to the clamping surfaces of the prism and interacting with the reference nodes.

FIG. 1 shows a device for controlling keyways, general view; in fig. 2 the same, top view. . IN SHAFT

The device contains a housing 1, equipped with a clamping prism 2, an elliptical liner 3, mounted on a cone shank of an aluminum bar 4 along the bisector of the prism angle 2. The rod 4 is fixed in housing 1 by a clip 5. 7, interacting with the reference nodes 8 (for example indicators), fixed in the housing 1 by the holders 9.

The device works as follows.

On the stem 4, the liner 3 is fixed, corresponding to the width of the keyway of the monitored shaft. The device is mounted on a controlled shaft so that the insert 3 is freely placed in the keyway, and the clamping prism touches the shaft with its surfaces. In this position, both reference nodes 8 are mounted on O with a tension of 0.30.5 mm. Clamp; insert 3 to the bottom of the artificial groove, fix the housing 1 of the device above the shaft 3-5 mm, and turn the stem 4 along with the insert 3 to complete

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fastening it to the keyway of the shaft. The body is lowered onto the shaft.

When the groove is displaced, the clamping prism 2 contacts the shaft with only one of the BOTH surfaces, and the reading of the reading unit 8 on this side of the device does not change, remains equal to 0. On the other side of the housing 1, only the measuring tip 7 comes into contact with the shaft, and the readout node shows twice the amount of displacement (S10NOCHNOGO groove from) axis of the shaft.

When measuring the bias of the keyway axis relative to the axis of the shaft, the device is set at the ends of the groove, and the half-difference of the readings of the reading device 8 gives the amount of bias.

Movable measuring tips, parallel to the base surfaces of the prism, create the conditions for the same pattern of jaw contact with shafts of different diameters.

Allowing Apply one device size where multiple sizes are required.

Claims (1)

Claims An instrument for controlling keyways on shafts, comprising a housing with a base prism, an insert installed in the housing along the prism angle bisector, and two reading angles installed in the housing, characterized in that, in order to expand the range of monitored shaft diameters, it is provided measuring tips installed in the housing grooves on plane-parallel springs parallel to the clamping surfaces of the prism and interacting with the reference nodes. Sources of information taken into account during the examination 1. Tolerances and landings. Ed. V.D. M gokova. L., Mechanical Engineering, 1979, vol. 1, p. 453 (prototype).