DE1763822A1 - Brush holder for electrical machines with sliding pressure lever - Google Patents

Description

SCHTINK & EBE OM

brush holder for electrical machines with sliding lever

The carbon brush guided in a straight line in the holder box Acting TVuckhehel can be pivoted around a pin and ssum Compensation of the resulting circular arc movement arranged displaceably. A brush holder construction is known, their lever brush side ti g with a cylindrical shape Pressure piece and at the opposite end with a Roller is provided, dje on a flat surface of the holder body rests. Approximately in the middle of the lever, the end of a spiral or vortex spring engages, which in principle intervenes Evans or Ellipsenlenkersvstera is formed.

However, since the end of the charge does not describe an exact arc, there must be greater lateral forces on the pressure piece linear support of the lever roller also brings the danger a flattening, which creates additional lateral forces can"

Furthermore, a brush holder with a pressure lever is used, which on the one hand slides on the rounded fiürstonkopf and whose rear end moves at the same time in a sliding guide which is pivotably mounted on a pivot. During the downward movement caused by the spring force, a torque occurs in this construction, which can cause tilting and hinder the pressure lever displacement in the guide _e The holder box must also have recesses on both sides for the pressure finger. In addition, this device can only be used for armored brushes, in which the current is transmitted through cables that are tamped or otherwise connected to the carbon.

109843/0439 - matt ? -

SCFt ¹ NK & EBE GMBH _, ^ _

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HETTHET,

A significant improvement in the print piece guidance will be by the brush holder designed according to the invention achieved displaceable pressure lever, which is characterized in that the pressure lever is rotatable about a bearing pin, displaceable in the plane of its center of rotation and its pressure piece pivotable in the head recess of the carbon brush is.

The storage of the pressure lever in the brush recess and in the Trunnions, as well as the arrangement of the pressure lever sliding surface in the plane of the center of the pivot point, guarantees a torque-free Shifting of the pressure lever, through which a uniform pressure piece movement guided in the direction of the brush axis is secured.

The pressure piece, the spring and the pivot are arranged to each other that their lines of action of force Cut with at least two pressure lever positions and the occurrence of significant lateral forces within the brush. wear area is prevented.

The pressure lever can slide in a recess of the bearing pin or it can also grip around it like a fork. Execution is not limited to the example shown. 41s pressure element can be a helical tension spring as well as a coil spring rolled up on the pressure lever or in the holder box can be used. An exemplary embodiment of the invention is shown in the drawing.

Fig. 1 shows a section through the brush holder. Fig. 2 shows a plan view of the brush holder.

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10 98 4 37 04 3 9. BATH

SCHTTNK Ά EBF OMBH

- sheet) HEnCHEI "ETM

In the holder box 1, the carbon brush 2 is guided, which has a head recess 3 into which the pressure piece h arranged on the pressure lever * engages. Animal pressure lever 5 is movable on a recessed in the center of the trunnion 6 G-leitflMche 7 bearing the bearing journal 6 is mutually in Lagerbohrunpen 8 of the Haiterka ^ least 1 rotatably disposed Pressure on the carbon brush 2 through a Schraubenzug-

or scroll spring 9 causes. The latter can be m

or rolled up in the holder box.

1 OS 8 L 3 / Π U Ί 9

"-V.

Claims (3)

SCHLINK A EBK GMBH HEUCHELHFTM * Pa t β η t a η spray ehe 1. Brush holder for electrical machines with movable pressure lever, characterized gekennze ic hn et that the pressure lever (5) rotatable about a bearing pin (6), displaceable in the plane of its pivot center, and its pressure floor (k) in the head molding O) of the carbon brush ( 2) is pivotable, 2 »Brush holder for electrical machines according to claim 1, characterized in that for at least two pressure lever positions the extensions the spring axis and the perpendicular to the sliding surface (7) of the bearing pin (6) on the extended Cut the brush axis. 3. Brush holder for electrical machines according to claim J and 2, characterized in that the pressure lever pivot point has a bearing pin (6) with a as a sliding surface (7) for the pressure lever (5) serving, symmetrical to the axis, recess is « Considered publications: DBP 660 972 U S A Pat. 3 1 ^ 6 365