DE1809592U - BRUSH HOLDER WITH ROLLER SPRING. - Google Patents

Description

ΡΑΉ6 838 * -4.5.W.11Ä

Brush holder with ball spring

Brush holders for electrical machines are intended for grinding brushes Press on the commutator with as little pressure as possible throughout its entire period of wear. To reach this goal" roll springs were used as a pressure device. These are springs that roll up to form a spiral and generate a torque when they are wound up generate constant size. However, such a pressure element does not allow worn brushes to be exposed without further ado So far, the holder has been built in such a way that the entire pressure organ is removed can be removed from the holder. Figure 1 shows such a known pressure element schematically, leaving out those that are not of interest here Parts. 1 is the scroll spring that tries to wind itself up and therefore presses the brush 3 onto the commutator or Hing 5. The scroll spring is riveted at the bottom to its carrier 2, whose rabbit 6 is supported against the feet 7 and thus holds it in its position Have swiveled 7 back (the mechanism is not shown here), so the pressure element 1-2 can be removed upwards »whereupon the brush is exposed. Loose parts are undesirable in holder construction » because they can easily be exchanged or lost.

Another disadvantage is that e3 solves the haste 7 joints or requires riveted resilient parts. '3 is worth seeing, to assemble the holder from as few parts as possible, including being able to manufacture it cheaply and easily ·

Finally, there is still the risk of the .Rollfeder that Scroll spring at its point of contact with the brush (Fig. 1, ITr 8) chafed through or annealed by the current transfer at this point will·

According to the invention, these disadvantages are avoided by a pressure element which is detachably but undetachably attached to the holder »consists of only 2 parts, namely the Hollfeder οχιά. their U-shaped support, and that ultimately does not require any resilient or articulated latches on the holder itself. In. Fig. 2 shows the pressure element. The spring 1 is attached to the U-shaped and therefore resiliently compressible support 2. 2 ITases Ga and 6b are pressed out of its rear wall. Figure J shows the associated holder 4- with the split pin 9 »which can be inserted into the holes 1-. The hole 11 is provided in the holder rear wall. Figure 4 shows

a section through the finished holder · The nose 6b is supported against the upper edge of the hole 11 and thereby holds the pressure element in its position. The rabbit 6a limits the downward movement of the Draclzorganes when the scroll spring is put on and thus prevents its contact with the commutator. In order to expose the brush, the two sides of the U-shaped carrier 2 are pressed together so that the rabbit 6b comes ^{out of τ} Άηι_τχ £ ί.

Then the whole pressure element can be guided upwards and around the cotter pin 9 swung around as drawn in picture 4, whereupon the brush exposed.

To prevent the peeler 1 from blooming or chafing through, a liolle 12 can be provided; which is rolled up in the scroll spring and whose sides protrude over the land of the eder »as is shown schematically in Fig. 5." It is also (Metal or lunstlcohle), whereby an isolation of each one, if desired, is still easily possible. The shape of the shell, especially its side parts, does not matter. It can have round or angular side surfaces · ^ He last ones have a larger contact surface on the brush and therefore not work so easily in. Fig. 6 shows 2. B. a hollow 12 with square side parts 13, to which the copper cables 14 are attached to draw current.

Claims (1)

Pl. 126159 2Ί 2.60 Speech. Brush holder with Hollfeder for constant brush pressure, whose Spring on a U-shaped detachable but captive aru holder Attached bracket is attached, on which 2 lugs are pressed out 3ind, the use and the aügelweg during commissioning and in whose peder an owl is curled up, characterized in that this ole the 3 rom from the brush derives.