Electric machine with non-drive sideband earthing brush and tachometer structure

Abstract

The present invention provides a motor with a grounding brush and a speed measuring mechanism on the non-drive side. The motor comprises a rotating shaft, an external bearing cover, a support plate and a grounding brush, a speed measuring mechanism and a bracket; the bracket bends for 90 degrees and is connected with the rear end of the external bearing cover; one end of the bracket is provided with a first blocking opening, and the other end is provided with a second blocking opening; a first installation hole arranged in the second blocking opening is connected with the speed measuring mechanism; the support plate is arranged on the external bearing cover of the motor; the external bearing cover is provided with a third blocking opening; the third blocking opening matches the first blocking opening of the bracket and is connected with a spring washer through a bolt. The arrangement of the grounding brush and the speed measuring mechanism on the non-drive side of the motor can not only protect the grounding brush, but also realize the standard interface for installing the speed measuring mechanism.

Description

Technical field [0001] The invention relates to a motor, in particular to a motor with a grounding brush and a tachometer structure on the non-transmission side. technical background [0002] The existing motor with tachometer structure guarantees a standard distance between the end surface of the outer bearing cover and the end surface of the rotating shaft, and adopts the standard stop and mounting hole size on the outer bearing cover, so that when the tachometer is installed, the standard is The size is installed on the outer bearing cover, so that when any tachometer is installed, only the part of the tachometer needs to be replaced without changing the shaft and outer bearing cover, which reduces a lot of work and facilitates standardized management. For the case where the grounding brush needs to be installed on the non-drive side of the motor, because the grounding brush is installed through the support plate installed on the outer bearing cover, it is impossible to instal...

AI Technical Summary

Problems solved by technology

In the case where the grounding brush needs to be installed on the non-drive side of the motor, since the grounding brush is installed through the support plate installed on the outer bearing cover, it is impossible to install the tachometer on the outer bearing cover. The above-mentioned set of standards The installation structure of the tachometer cannot be realized

At present, although there is a method of installing the grounding brush on the transmission side, it will have to lengthen the shaft extension of the shaft to install the grounding brush, which will affect the size of the motor shaft extension and the base foot, and this The size is the user's installation size, if the size is changed, it will affect the universality and interchangeability of the motor, so it should still be considered to install the grounding brush on the non-drive side

[0003] see figure 1 , is a structural schematic diagram of a motor with a grounding brush in the prior art, including an outer bearing cover 1', a grounding brush 21', a support plate 22', a rotating shaft 3' and a protective cover 4', and the protective cover 4' is used to protect the grounding The brush 21', but the installation of the protective cover 4' makes it impossible to install the structure of the tachometer part

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