SU1265901A1 - Brush unit of electric machine - Google Patents

Abstract

The invention relates to electrical engineering. The aim of the invention is to improve the performance of the assembly by ensuring the fixation of the brush in the housing of the brush holder in the raised position. The brush assembly contains a brush holder, in the window of which a brush 5 is installed, a bar 3 made in the form of two plates connected in the lower part by a bridge, the bar fixed in the grooves 2 made in guides which are connected by a rod 10 which is mounted relative to the restrictive stop 13 so that when the strip 3 bent to the stop and contacting the stop with the rod mate, an angle between the strip and the side surface of the brush is formed, which is smaller than the angle formed when there is no brush between the strip in seemed position and the plane tangent to the pressure spring. 2 Il. (L to O5 ate; o

Description

The invention relates to electrical engineering.

The purpose of the invention is to improve the performance characteristics of the unit by ensuring that the brush is fixed in the housing of the brush holder in the raised state.

FIG. 1 shows the brush assembly of an electric machine, a slit; in fig. 2 is a view A of FIG. one.

The brush assembly contains a brush holder, in the guides 1 of housing 2 of which a bar 3 is installed with a pressure spring 4 fixed on it. The spring interacts with a brush 5 installed in the window of housing 2 (in Fig. 1 it is shown by a dotted line in the raised state with which it interacts spring 4). The bar 3 is made in the form of two plates (FIG. 2) connected in the lower part by a jumper 6. The plates of the bar 3 are provided with support 7 and mounting 8 protrusions on the outer lateral sides. With these projections, the bar is fixed in the grooves 9, made in the guides 1, which are connected by the rod 10. The bar 2 is made with side grooves 11 located between the mounting projections 8 and its lower part, the width of the bar 2 within the grooves 11 is less than the width groove 9, made in the housing. The lower part 12 of the plank 3 is, for example, at a right angle to the vertical walls of the recesses 11, and in the upper part of the housing 2 in the area of the guides 1 there is a restrictive stop 13. The rod 10 is installed in the brush holder with respect to the restrictive stop 13 in such a way that when before contact with the stop 13 of the strap 3 and the mating of its bent lower part 12 with the rod 10, an angle a is formed between the strap 3 and the side surface of the brush 5 facing it, and this angle a is smaller than the angle p, which is formed without brush 5 (in FIG. 1 such position The spring 4 is shown by a solid line between the bar 3 in the aforementioned (extended) position and the plane, the tangent (in Fig. 1 is the straight sun) and the pressure spring 4 on the side of the brush 5 and passing through the intersection line (in Fig. 1 - point B) of the plane of the strap 3 in the indicated position with the side surface 14 of the sheath 5 drawn to the strap. FIG. 1 position 15 marked the wall of the window in the housing 2 under the brush 5.

The device works as follows.

With the help of the mounting protrusions 8, the strap 3 with the spring located on the brush (not shown in the figures) is fixed in the slots 9 of the housing 2. The supporting protrusions 7 thus serve as constraints on the movement of the strap. Side notches 11 provide the ability to input and output slats in the housing. The lower part 12 of the rail is bent and the stop 13 together with the rod 10 ensures that the rail is held in the housing.

when installing brushes and revision knots. Due to the described mutual placement of the rod 10 and the stop 13, the spring 4 with the bar 3 released from fixation in the slots 9

and the removed brush 5 is partially located above the window in the housing under the brush (shown in Fig. 1 by a solid line delineating the spring 4), and with the brush 5 installed (shown in Fig. 1 by a dashed line) it reliably fixes the brush in the housing in a raised state, since in this case the brush 5 is pressed by the spring 4 to the wall 15 of the window in the housing 2 under the brush. In order to remove or insert the brush holder 5 into the brush holder 5, the spring 4 must be retracted.

Thus, in comparison with the known, the operational characteristics of the brush assembly are improved by providing the possibility of reliable fixation of the brush.

0 in the housing in elevated condition, which enhances ease of commissioning, drilling and grinding the collector, testing the electric machine, determining its electromechanical parameters and other modes of operation when the brush should be removed from the collector.

Claims (1)

Invention Formula The brush unit of the electric maschion, containing a brush holder, in the body guides of which a bar is installed with a pressure spring fixed on it, interacting with a brush installed in the brush holder window, the bar is made in the form of two plates connected by a jumper in the lower part, the plates are provided with supporting and mounting tabs which are placed on the outer lateral sides and with the help of which the bar is fixed in grooves made in guides which are connected by a rod, 40 the bar is made with lateral grooves located between the mounting protrusions and its lower part, so that the width of the bar within the specified grooves is less than the width of the groove made in the housing, with the lower part angled to the vertical walls of the grooves, and in the upper part of the housing in the area of the guides A restrictive abutment, characterized in that, in order to improve the performance characteristics of the assembly’s node by ensuring the fixation of the brush in the brush holder housing in the raised position, the rod is mounted in the brush holder flax limiting stop so that when outputted to contact with abutment strip and its conjugated zhenii 55 of the bent lower part with the rod, an angle is formed between the bar and the side surface of the brush facing it, smaller than the angle formed when there is no brush between the bar in the indicated position and the plane tangential to the pressure spring from the brush side and passing through the plane of intersection position with the side of the brush facing the plank.