SU763873A1 - Scale mechanism for adjusting electric machine - Google Patents

Description

one

The invention relates to scale mechanisms for setting up an electric machine, which are used to coarsely adjust the scale with the rotation of the rotor to the desired angle, perform an accurate, final adjustment of the scale by rotating the input gear interacting with the gear wheel mounted on the .Q rotor, fixing the position rotor (scale) by tightening rotor support screws.

Devices are known that are used to move a rotating "r" shaft, containing kinematic chains (1.

Closest to the proposed design is a large-scale mechanism containing the actual tuning mechanism, consisting of a single-stage cylindrical gearbox, including an input gear coupled with a gear wheel mounted on the rotor, and a stopper 25 device in the form of a rigid massive cover with screws, mounted on rigid guide pins.

The disadvantages of this mechanism are the low accuracy of setting

due to the inevitable departure of the scale in the process of its fixation and the preservation of this departure after the final locking of the locking device, the laboriousness of the adjustment due to the need for multiple reorganizations caused by the departure of the scale.

The purpose of the invention is to create a large-scale adjustment mechanism that ensures particularly high precision of the scale adjustment, reducing the laboriousness of the adjustment, i.e. increased ease of use.

This goal is achieved by the fact that it contains the second stage of fine tuning, made in the form of the second stage of the worm gear, the end of which is placed on the body of the tuning mechanism from the side of the elastic cover.

Figure 1 schematically shows a large-scale electric machine with a large-scale adjustment mechanism of an electric machine, longitudinal section; figure 2 - the same, end view; on fig.Z - input element settings, the cut.

The tuning mechanism is made in the form of a two-stage worm gear.

with a large gear ratio (on the order of 300) The second stage of accurate tuning is formed by the input screw 1 having a head with a slot 2 located on the front side of the housing 3 and coupled with an oblique gear wheel 4, the first stage is exact-. The worm is formed by a screw 5 coupled with a € f helical gear fixed with a clamping nut 7 on the output end of the rotor shaft 8 and having a collet shank with an external thread 9 The locking assembly is made in the form of an Elastic cover 10 with a round cylindrical central hole fixed by screws 11 and leaning on a cone clamping nut.

The adjustment and fixing of the scale is performed as follows.

The screws 11 of the locking unit 10 are loosened by the 3s1 clamp 7 collet 9 and the hem itself, the wheel 6 and the rotor 8 are disconnected. The coarse scale setting is performed by turning the rotor 8 to the required angle 1 by a screwdriver inserted in the slot of the end face 12 for a rough rotor shaft scale settings. Close the clamping nut 7 and thereby. The wheel 6 is connected to the rotor, 8. The scale is preliminarily fine-tuned by turning the screw 1 with a screwdriver inserted into the slot of the head 2. Lock the locking device with 10 screws 11. At the same time, friction forces arise between the elastic cover 10 and the tapered part of the clamping nut 7, which is sufficient to maintain scale in terms of vibration, shock, and other mechanical factors, but not enough. rigid control of the output of the gearbox. When locking the lock assembly inevitably, there is an inevitable departure of the previously exposed scale, which means a deterioration in the tuning accuracy.

An additional fine scale adjustment is then performed by

rotation of the locked rotor by turning the screw 1. At a larger moment at the output of the gearbox (on the rotor shaft), the frictional forces between the elastic cover 10 and the rotor 8 are easily overcome and it is possible to reduce the scale departure earlier in the locked rotor,

As a result of the application of the proposed adjustment mechanism, the ability to set the scale of the adjustable parameter with extremely high accuracy (about 5-10 arc seconds in the rotor position) while maintaining its exact value, the speed of adjustment, since the repeated scale settings are eliminated.

Claims (1)

Invention Formula A scale mechanism for setting up an electric machine, comprising a housing, a first fine tuning stage, made in the form of a worm gear, whose gear wheel is mounted on the rotor shaft of the electric machine and associated with a clamping nut placed on the end of the rotor shaft, on the end of which is a slot The scale adjustment switch, and the stop assembly in the form of an elastic cover with 1; a central opening in which the clamping nut cone is located, characterized in that, in order to increase the tuning accuracy and ease of operation of the mechanism, it contains a second fine tuning step, made in the form of the second stage of the worm gear, the end of which is placed on the body adjustment mechanism on the side of the elastic cover. Sources of information taken into account during the examination 1. Koldak S.А. Repair of electric micromachines of automatic devices. M., Energie, 1965, p.32.