FR2699757A3 - Brush holder for a small electrical device especially for small electric motors. - Google Patents

Abstract

a) Brush holder for a small electrical appliance, in particular for small electric motors. b) Brush holder characterized in that the conductive bar (21) has a conduction cross section over its entire length and that the deformations have the shape of a hook (25) closed in the manner of a button. c) The invention applies to brush holders, in particular for small electric motors.

Description

"Brush holder for a small electric appliance, especially for small ones

  BACKGROUND OF THE INVENTION The invention relates to a carrier for a small electrical appliance, particularly small motors, comprising a rigid base plate made of

  insulation wire and at least one metal conductor bar fixed to the base plate, connected to connections for current input and output for brushes, impact coils, capacitors or the like, the busbar being anchored in the

  It is already known to use brush holders, which are made from conductive plates, in which the conductive tracks are made to electrically connect and recess.

  bond brushes, shock coils and capacitors by stripping specific areas of the metal layer. Such conductive tracks are suitable only for low intensities. Brush holders are already known in which conductive bars are anchored to a fixed base plate made of insulating material, which bars are formed by buffering from a surface. metal platen The conductive bars 25 have laterally projecting lugs and bent as connecting elements They are fixed on the base plate with protruding legs and

  curved through openings, legs which are de-

  cut from the surface of the conductor bars

  These disadvantages in the case of these conductor bars

  is that these have cross-sections

  the ones that vary in the direction of their length and that in particular the conductive cross section is

  considerably weakened in the area of the legs

cut.

Advantages of the invention

  The brush holder according to the invention is

  characterized by the fact that the conductor bar has a

  transverse conduction along its entire length

  and that the deformations have the shape of a hook

  The brush holder according to the invention has the advantage that its busbars

  formed from a flat cable that is commonly found

  commercially by folding have a section

  In addition, they can be

  bricks under falls, so that the costs of

  production of both material and

  the machining devices, are low In addition, the closed hooks button-shaped are suitable

  particularly for connecting connecting cables

  and connecting cords by welding or brazing.

  Advantageous configurations can be

  the brush holder according to the invention by virtue of the fact that: the hook is closed in the manner of a button

  presents tabs and a part connecting them

  be them, tabs that come into engagement from the ajour on the side of the plate, which is next to

  the bearing surface of the conductive bar.

  in the connecting part of the

  glet is formed a molding for receiving a connecting wire. at least two tabs are arranged on a conductive bar. Drawings An embodiment of the invention is shown in the drawings and will be described more

in detail below.

  Figure 1 shows a brush holder in plan view. FIG. 2 shows the brush holder according to FIG. 1 without trim in view from below and,

  Figure 3 shows part of the carrier

  broom according to Figure 2 in cross section.

  Description of the exemplary embodiment

  The brush holder has a baseplate or

  disc-shaped support 11 made of an insulating material

  For the connection and the electrical connection

  brooms 12, shock coils 13 and condensate

  several conductor bars 21, 22, by

  four bars, are attached to the plate

  port 11, bars by means of which are set

  tact the connection cables and the connection cords.

  15.1 16 according to a circuit determined by welding.

age or brazing.

  The busbars 21, 22 are manufactured

  from a flat metal cable and are

  curved part 21 and partly rectilinear (22).

  They are fixed on the support plate 11 by deformation

  different areas of the flat cable to form

  hooks 25 in the form of a button, which penetrates

  trent through openings 23 in the support plate

  11 and are flattened on the opposite side (Figure 3) Se-

  their length or the number of connections, the bar-

  21, 22 are anchored by two, three

or more than one closed hook 25.

  The perforations 23 have a rectangular shape, the short sides of the rectangle being a little wider than the width of the conductive bars 21, 22 and extend perpendicular to their alignment. For ease of assembly, the openings 23 have recesses.

  24 arc-shaped in the long sides.

  The busbars 21, 22 are manufactured

  as follows: Sections are suspended by a flat cable with a cross-section of eg 4 x 0.8

  mm and these sections are also curved in part.

  In these sections, one forms at the places of fixing

  U-shaped closed hooks 26, without

  The above-mentioned conductive bars 21, 22 are joined to the support plate 11 so that they rest by their rectilinear zones 27 on one face of the support plate 11 and that their closed hooks 26 penetrate to the surface of the support plate 11. through the openings 23 (Figure 3 on the left) To anchor the busbars 21, 22 on the support plate 11, the closed hooks 26 are flattened so that their branches are deformed in tabs 28 which rest on the opposite face of the plate 11 and their top is flattened with the outer portion of the tab 28 parallel to the plane of the support plate 11, so that a closed hook 25 is formed, which ensures for the conductive bar 21, 22 the function of a button (figure 3, on the right) These closed hooks also serve to put the cables in contact with each other.

  connecting cords 15, 16 by welding or brazing

  For the connection point to be exact-

  localized and that during the welding of the connection cable 15 by spot welding, the material of the cable is not widely moved by pressing, is formed in the portion connecting the two tabs 28 one

  to the other a molding 30 to receive about me

  of the cross-section of the connecting cable

  15. The ends of the busbars 21, 22 are partly in the plane of their extent, they are partly extended and bent from the support plate 11, and formed like a hook 31,

  with which a connecting pipe may be connected

  In place of the hook 31, one end of a conductive bar 21, 22 may also have a third closed hook 25 on which the conduct

  connection is brazed or soldered.

Claims (4)

R E V E N D I C A T IO N S   1) Brush holder for a small electrical appliance   particularly a small motor, with a   than rigid base of insulating material and with at least one metal conductor bar fixed on the base plate, which bar is connected to connectors   for the arrival and departure of the current for   lais, shock coils, capacitors or analogous   these bus bars being anchored to the base plate by deformations engaging through openings therein, characterized in that   that the conductive bar (21, 22) has a trans-   conductive throughout its length and that the   deformations have the shape of a hook closed to the of a button (25).   2) Brush holder according to claim 1,   characterized in that the closed hook (25) in the manner of a button has tabs (28) and a portion (29) connecting them together, tabs which engage from the aperture (23). on the side of the plate (11), which is opposite the bearing face of the conductive bar (21).   3) Brush holder according to claim 2,   characterized in that in the connecting portion (29) of the tab (28) is formed a molding (30) for   receive a connecting wire (15).   4) Brush holder according to one of the claims   1 to 3, characterized in that two tabs (25)   are arranged at least on a conductive bar (21).